January 1969 v.20 n.5

Cover: Model 2547A Coupler is shown recording the readings of a counter and a digital voltmeter on punched tape for entry into a time-sharing terminal

Broadband Passive Components for Microwave Network Analysis. It takes more than an advanced network analyzer to make accurate, broadband device-parameter measurements. You need precision, broadband hardware and it helps to have everything in one instrument, by Stephen F. Adam, Richard A. Lyon, George R. Kirkpatrick, pg 2-10. 8745A, 8743A, 8761A/B, 788D, 779D, 11606A, 11588A.

Measuring High-Frequency Transistor Parameters. If you have the right instruments, high-frequency transistor measurements are very simple. Here is the method along with some advice on taking and interpreting data, by Richard H. Bauhaus, pg 11-14. 11600A, 11602A, 8717A.

Printed-Circuit Slide Switches Save Panel Space, pg 13

[Author:] Richard A. Bauhaus, pg 14

Recording Data for Computer Analysis. This modular digital coupler, together with a recording device, translates the digital outputs of voltmeters, counters and other instruments into computer-compatible digital records, by Robert L. Knapp, William J. Steinmetz, pg 15-20. 2547A.

[Authors:] Robert L. Knapp, William J. Steinmetz, pg 20.

February 1969 v.20. n.6

Solid-state Displays. First in a line of solid-state display devices are these one- and three-digit numeric indicators that are compatible with integrated circuits, needing only BCD input signals and five-volt power to display any numeral from 0 to 9 in an array of bright red dots, by Gerald P. Pighini, Howard C. Borden, pg 2-12. 5082-7000.

Solid-State Displays, Present and Future, pg 4

Measuring Luminance, pg 10

[Authors:] Howard C. Borden, Gerald P. Pighini, pg 11

Hybrid Hot Carrier Diodes. Unique combinations of p-n junctions and Schottky barriers have the high breakdown voltage and high-temperature characteristics of silicon, the low turn-on voltage of germanium, and the speed of Schottky barrier devices and they can be produced at low cost, by A. Michael Cowley, Robert A. Zettler, pg 13-20 5082-2800.

Hybrid Technology Produces Many Useful New Devices, pg 16

[Authors:] A. Michael Cowley, Robert A. Zettler, pg 19

March 1969 v.20 v.7

Cover: Artistically portrayed unique measurement capabilities of the HP Model 3450A Multi-Function Meter

Twelve Functions in a New Digital Meter. Some common analog-to-digital conversion techniques and benefits derived from dual slope as used in the new digital instrument, by Jerry L. Harmon, Bill Kay, pg 2-13. 3450A.

Peltier Heating and Cooling, pg 6

[Authors:] Harold Briggs, Jerry Harmon, Bill Kay, pg 12

A Computer-Controlled System for Testing Digital Logic Modules. High-speed system that can do production testing quickly, thoroughly and economically along with being easy to program and operate and to adapt for testing different modules, by William P. Cargile, pg 14-20. 2060A.

2060A System Commands, pg 19

[Author:] William P. Cargile, pg 20

April 1969  v.20 n.8

Cover: Two Model 1925A Word Generators are cascaded to produce a 32-bit word in a nonreturn-to-zero format shown on the face of a Model 143A Oscilloscope

A New Programmable, Building-Block Pulse and Digital System. A pulse generator system consisting of a series of plug-ins that can be combined to provide a wide variety of digital test signals, by Ronald L. Knauber, Gordon K. Blanz, pg 2-8. 1900, 1900A, 1901A, 1905A, 1908A, 1910A, 1915A, 1917A, 1920A, 1925A.

Why Use Variable Rise and Fall, pg 5

[Authors:] Gordon Blanz, Ron Knauber, pg 8

Generating Words for Digital Testing, by Eddie Donn, pg 8-13. 1925A.

[Author:] Eddie Donn, pg 12.

Frequency-Domain Oscilloscope Now Measures to 1250 MHz. With this new RF plug-in, HP’s absolutely calibrated RF spectrum analyzer can display any part of the new frequency range from 500 kHz to 1250 MHz – or the whole range at once, by Siegfried Linkwitz, pg 14-20. 8554L, 8552A.

The Meaning of “Frequency-Domain Oscilloscope”…excerpts from an Informal Talk, by Roderick Carlson, pg 16

Beyond Traditional Spectrum Analyzer Uses, pg 18

[Author:] Siegfried Linkwitz, pg 20

May 1969 v.20 n.9

Cover: Model 5360A Computer Counter’s extraordinary capabilities

Introducing the Computing Counter. Here is the most significant advance in electronic counters in recent years, by Gilbert A. Reeser, Gary B. Gordon, pg 2-8. 5360A, 5379A.

The Measurement Cycle and the Concept of Arming, pg 5

An Electronic Counter for the 1970’s. What does it take to build an 11-digit counter that goes to 320 MHz and makes time-interval measurements with 100-picosecond resolution?, by Gilbert A. Reeser, pg 9-12. 5360A.

[Author:] Gilbert A. Reeser, pg 12

Computation for Measurement Flexibility. The arithmetic unit of the computing counter places a flexible digital computational capability at the disposal of the counter, its plug-ins and the user, by France Rode, Gary B. Gordon, pg 13-16. 5360A.

[Authors:] France Rode, Gary Gordon, pg 14

Automatic Counter Inverts Period to Get Frequency. The computing counter’s little brother measures frequencies between 0.125 Hz and 20 MHz with seven-digit resolution and fully automatic ranging and also measures pulsed carrier frequencies directly, by Ian T. Band, pg 17-20. 5323A.

[Author:] Ian T. Band, pg 20

June 1969 v.20 n.10

Cover: HP Model 4920A Coaxial Fault Analyzer

Portable, Rugged Cable Fault Locator for VHF Communications and CATV. Designed for field use, an easy-to-operate TDR unit checks CATV and communication system cables with high accuracy, by Ronald D. Lowe, pg 2-8. 4920A.

Time Domain Reflectometry, pg 5

[Author:] Ronald D. Lowe, pg 7

Tradeoffs in Impulse Testing, by James M. Hood, pg 8-9

[Author:] Jim [James] Hood, pg 9

Compact Function Generator Covers 0.0005 Hz to 5 MHz. New instrument generates seven types of waveforms over a wide frequency range, by Raymond C. Hanson, pg 10-13. 3310A.

[Author:] Raymond C. Hanson, pg 13

IC Logic Checkout Simplified. Simple but elegant, this touch-and-read logic probe clearly signals the presence of nanosecond pulses and indicates logic levels in TTL and DTL integrated-circuit logic networks, by Gary B. Gordon, pg 14-16. 10525A.

[Author:] Gary B. Gordon, pg 16

Pulsar Optical and Radio Emissions Observed Simultaneously. Detection of a time interval between the optical and radio pulses has provided an important test of the various theories developed to explain why pulsars pulse, by Charles N. Taubman, pg 17-20

[Author:] Charles N. Taubman, pg 19

Are Pulsars Rotating Neutron Stars? pg 20

July 1969 v.20 n.11

Cover: HP Model 80500A Noise Monitoring System at Stuttgart Airport

Real-Time Measurement and On-Line Processing of Acoustical and Other Audio-Frequency Spectra. Almost any acoustical quantity can be determined by measuring and suitably processing the frequency spectra of sounds. All it takes is this new real-time audio spectrum analyzer married to a general-purpose digital computer, by Wisu T. Kapuskar, Christopher J. Balmforth, pg 2-10. 80501A, 8054A.

[Authors:] Wisu T. Kapuskar, Chris J. Balmforth, pg 8

Monitoring Airport Noise. Noise control around airports is never easy but it’s next to impossible without up-to-the-minute information about noise levels at critical locations. Here’s a computerized system that gathers and processes the necessary data, by Wisu T. Kapuskar, Christopher J. Balmforth, pg 11-15. 80500A.

Network Analysis at Low Frequencies. Both phase and amplitude information are obtained with a new network analyzer covering frequencies down to 10 kHz, by Charles A. Kingsford-Smith, pg 16-20. 675A, 676A.

[Author:] Charles A. Kingsford-Smith, pg 20

August 1969 v.20 n.12

Cover: HP Model 9213A is a general-purpose computer-controlled, dc-to-12.4-GHz automatic calibration system for lab-type instrumentation

Automated Testing. What is automated testing? What does it buy us? How is it evolving?, by Robert A. Grimm, pg 2-6. 9500A.

[Author:] Robert A. Grimm, pg 6

Choosing an Automatic Test System. When is an automatic test system justified? how do you decide on the configuration?, by Stephen C. Shank, M. D. Ewy, pg 7-10

[Authors:] M. D. Ewy, Stephen C. Shank, pg 10

Building an Automatic Test System. What are the things you have to think about when putting a system together?, by M. D. Ewy, pg 11-14

Hewlett-Packard Automatic Test Systems. HP uses and supplies small modular systems of all kinds: standard special-purpose systems, standard multipurpose systems, custom systems, and system components, by Robert A. Grimm, pg 15-20

September 1969 v.21 n.1

Cover: Isometric projection of a function computed by the 9100A Computing Calculator and plotted simultaneously by the 9125A plotter.

Graphical Output for the Computing Calculator. An X-Y plotter, designed to take the calculator output, draws graphs of solutions to complex problems. It can make Smith Charts, polar, semilog and log-log plots, by Robert W. Colpitts, Dan Allen, Tom Vos, pg 2. 9125A.

[Authors:] Robert W. Colpitts, Dan Allen, Tom Vos, pg 6

Plotter Applications, pg 7

Antenna Plots, pg 7

High-Resolution Time-Domain Reflectometry With a Portable 30-lb Instrument. State-of-the-art sampling oscillography gives 35 ps system risetime to a direct-reading plug-in for the 180-series oscilloscopes, by Jeffrey H. Smith, pg 8-14. 1815A, 1815B, 1817A, 1816A, 1106A, 1108A.

[Author:] Jeffrey H. Smith, pg 13

Precision DC Current Sources. CCB-Series Current Sources can supply precisely regulated currents and programming is rapid, and tiny leakage currents are eliminated by a guarding technique, by Willis C. Pierce, Jr., Joseph C. Perkinson, pg 15-20

Current Sources in the Laboratory and on the Production Line, pg 16

[Authors:] Joseph C. Perkinson, Willis C. Pierce, Jr., pg 19

October 1969 v.21 n.2

Cover: HP Model 4470A Transistor Noise Analyzer

Direct Measurement of Transistor Noise Voltage, Noise Current and Noise Figure. New analyzer measures noise in FET’s and bipolar transistors from 10 Hz to 1 MHZ while rapid and easy operation makes it suitable for both lab and production testing, by Haruo Itoh, Knud L. Knudsen, pg 2-7. 4470A.

[Authors:] Haruo Itoh, Knud L. Knudsen, pg 7

Sources of Noise in Transistors, by Niladri R. Mantena, pg 8-11

[Author:] Nilardi R. Mantena, pg 11

Premonitory Heartbeat Patterns Recognized by Electronic Monitor. Computerlike instrument for intensive care wards provides advance warning of potentially fatal heart irregularities, by Thomas C. Horth, pg 12-20. 7822A.

Electrical Performance of theHeart, pg 14

Ectopic Beats, pg 15

[Author:] Thomas C. Horth, pg 20

November 1969 v.21 n.3

Cover: Model 3721A Correlator displaying the crosscorrelation between a wideband noise coming from a loudspeaker and the output of a microphone

Correlation, Signal Averaging, and Probability Analysis. Correlation is a measure of the similarity between two waveforms which is useful in nearly every kind of research and engineering. Two other statistical methods of waveform analysis are also widely useful, by Richard L. Rex, Gordon T. Roberts, pg 2-8

[Authors:] Richard L. Rex, Gordon T. Roberts, pg 8

A Calibrated Real-time Correlator/Averager/Probability Analyzer. This digital signal analyzer computes and displays 100-point autocorrelation functions, crosscorrelation functions, waveshapes of signals buried in noise, probability density functions, and probability distributions, by George C. Anderson, Michael A. Perry, pg 9-16. 3721A.

[Authors:] Michael A. Perry, George C. Anderson, pg 15

Correlation in Action. Selected Applications of Model 3721A Correlator, pg 17-20.

December 1969 v.21 n.4

Cover: Model 8407A Network Analyzer System which reveals transmission characteristics of a multi-pole bandpass filter, displays amplitude and phase response

Network Analysis in the Range 100 kHz to 110 MHz. With speed and convenience, a new Network Analyzer presents swept display of amplitude response as great as 80 dB, yet achieves 0.05 dB resolution, by William A. Rytand, David R. Gildea, pg 2-11. 8407A, 8412A, 8414A, 11652A, 11651A, 11654A.

[Authors:] David R. Gildea, William A. Rytand, pg 11

Network Analyzer Applications, pg 7

High Impedance Probing to 500 MHz. Intended for use with spectrum analyzers, counters, oscilloscopes and network analyzers when the signal can’t be brought to the instrument on a 50-ohm line, a new dc-500 MHz voltage probe has an input impedance of 100 k ohms shunted by less than 3pF or, with a slip-on voltage dividers, less than 1 pF, by Joel Zellmer, pg 12-16. 1120A.

[Author:] Joel Zellman, pg 16

January 1970 v. 21 n.5

Cover: Operator uses optical comparator to check alignment of helical electrodes in new 250MHz Oscilloscope’s cathode-ray tube

A DC-to-VHF Oscilloscope. Displaying intermittent pulse trains with nanosecond risetimes, capturing fast transients, a predetector look at amplitude-modulated carriers – these are some of the tasks performed by a new general-purpose oscilloscope that has dc-250 MHz bandwidth and 10 mV/cm sensitivity, by James Pettit, pg 2-8. 183A, 183B, 1830A, 1840A.

[Author:] James Pettit, pg 8

A Fast-Writing, High-Frequency Cathode-Ray Tube. A three-way requirement for high-frequency response, fast writing rate, and sensitivity used all that we knew about cathode-ray tube design, and more, by David Chaffee, pg 9-10. 183A.

[Author:] David Chaffee, pg 10

A Wideband Oscilloscope Amplifier. Solid-state monolithic technology makes possible wideband amplifier design with improved response, economy of power, and ease of maintenance, by Alan J. DeVilbiss, pg 11-14. 1830A.

[Author:] Alan J. DeVilbiss, pg 14

Monolithic Transistor Arrays for High-Frequency Applications, by Merrill Brooksby, Richard D. Pering, pg 15-16

[Authors:] Merrill Brooksby, Richard D. Pering, pg 16

A Fast Time Base for a High-Frequency Oscilloscope. A fresh approach to time base circuits was needed to get fast linear sweeps and stable triggering at high frequencies, by William Mordan, pg 17-20

[Author:] William J. Mordan, pg 20

February 1970  v.21 n.6

Cover: Automatic network analyzer systems can vary widely and the power of these systems has produced a revolution in microwave engineering

A System for Automatic Network Analysis, by Douglas Kent Rytting, Steven Neil Sanders, pg 2-10. 8542A.

About the Hardware…, pg 8

[Authors:] Douglas Kent Rytting, Steven Neil Sanders, pg 10

Software for the Automatic Network Analyzer, by William A. Ray, Warren W. Williams, pg 11-15

[Authors:] William R. Ray, Warren W. Williams, pg 15

Developing Accuracy Specifications for Automatic Network Analyzer Systems, by B.P. Hand, pg 16-19

[Author:] B. P. [Phil] Hand, pg 19

Applications of the Automatic Network Analyzer, by Brian Humphries, pg 20-24. 8542A.

[Author:] Brian A. Humphries, pg 24

March 1970 v.21 n.7

Cover: Model 5375 A Keyboard

The Computing Counter Gets Its Keyboard. The computing counter with its keyboard has the computing ability and operating convenience of a programmable desk calculator, plus the ability to make measurements and process the measured data in real time, by Keith M. Ferguson, pg 2-10 5360A, 5379A, 5375A.

[Author:] Keith M. Ferguson, pg 10

Correction to “’Flying Clock’ Comparisons Extended to East Europe, Africa and Australia”,  page 12 in the December 1967 issue, by Leonard S. Cutler, pg 10

Protecting Hospitalized Patients from Electrical Hazards. Electrodes internal to the body give rise to safety problems far more complex than generally supposed, requiring changed thinking about the design and use of medical electronics equipment. Electronic engineers can help explain these concepts, by William F. Craven, pg 11-17

[Author:] William F. Craven, pg 17

Calculator Processes Multichannel Analyzer Data. Two interface cards and a cable connect HP multichannel analyzers to HP’s programmable desktop calculator, by Norman D. Marschke, pg 18-20. 10619A.

[Author:] Norman D. Marschke, pg 20

April 1970 v.21 n.7

Cover: Model 5326B Timer/Counter DVM

Timer/Counter/DVM: A Synergistic Prodigy? One version of this medium-cost universal counter has an internal digital voltmeter, from which it derives some surprising capabilities. Both versions can average repetitive time intervals for increased resolution, and can measure the frequencies of pulsed carriers, by Kenneth J. Jochim, Rolf Schmidhauser, pg 2-10. 5326A, 5326B.

A Network Analyzer with Digital Readout, pg 9

[Authors:] Kenneth J. Jochim, Rolf Schmidhauser, pg 9

Measuring Nanosecond Time Intervals by Averaging. What kind of resolution can you get and how do you get it? What about accuracy?, by Rolf Schmidhauser, pg 11-13

High Accuracy AC Calibration to 1100 Volts, by Fred L. Hanson, pg 14-17. 745A, 746A.

[Author:] Fred L. Hanson, pg 17

A New Camera for High-Speed Oscilloscope Recording, by Dan Paxton, pg 18-20. 195A.

[Author:] Dan Paxton, pg 20

May 1970 v.21 n.9

Cover: IMPATT diodes

Design and Application of Silicon IMPATT Diodes. DC power is converted directly into microwave energy by an IMPATT diode. In X-band, these devices generate higher CW power than any other present-day, solid-state microwave source, clearing the way for new cost-sensitive microwave designs, by A. M. Cowley, pg 2-13. 5082-0400, 5082-0401.

Making Cool-Running IMPATT Diodes, pg 8

Measuring IPMATT Diode Thermal Resistance, pg 10

[Author:] A. M. [Mike] Crowley, pg 13

Measuring Capacitance Automatically. Completely automatice multifrequency bridge measures capacitance from 0.001 pF to 1.2 mF, conductance and dissipation factor, by Hitoshi Noguchi, Takeo Shimizu, Koichi Maeda, pg 14-20. 4270A.

Logic Circuits, pg 17

[Authors:] Hitoshi Noguchi, Takeo Shimizu, Koichi Maeda, pg 20

June 1970 v.21 n.10

Cover: Model 5450A Fourier Analyzer next to a United Airline jet engine

Digital Fourier Analysis. Some of the theoretical and practical aspects of measurements involving Fourier analysis by digital instrumentation, by Peter R. Roth, pg 2-9. 5450A.

[Author:] Peter R. Roth, pg 9

A Calibrated Computer-Based Fourier Analyzer. This pushbutton-controlled digital measuring instrument performs complex analytical operations on input signals or time series and as a bonus, the user gets a general-purpose digital computer, by Agoston Z. Kiss, pg 10-20. 5450A.

A Fourier Analyzer Makes Fundamental Measurements, pg 15

[Author:] Agoston [Ago] Z. Kiss, pg 20

July 1970 v.21 n.11

Cover: An inspector critically eyes solid-state alphanumeric display module.

Solid-State Alphanumeric Displays, by Howard C. Borden, Robert L. Steward, pg 2-9. 5082-7100, 5082-7102.

The Mathematics of Strobed Arrays, pg 9

[Authors:] Howard C. Borden, Robert L. Steward, pg 9

Adding More Precision to Spectrum Analyzer Measurements. Augmented with a combination tracking signal generator and counter, the spectrum analyzer becomes a swept measuring system of great frequency precision and dynamic range, by Patrick J. Barrett, Robert R. Hay, Paul G. Winninghoff, pg 10-16. 8443A, 8553B, 8552B.

Product Design, by William H. Bull, pg 13

[Authors:] Rob Hay, Bill Bull, Pat Barrett, Paul G. Winninghoff, pg 16

August 1970 v.21 n.12

Cover: Model 5525A Laser Interferometer

A Two-Hundred-Foot Yardstick with Graduations Every Microinch. This new and innovative laser interferometer is ready to measure distance with no warmup at all. From its specially designed two-frequency laser and heterodyning techniques it derives increased sensitivity and resistance to air turbulence and with its internal computer it can smooth jittery readings, calculate velocity and improve resolution, by John N. Dukes, Gary B. Gordon, pg 2-8. 5525A.

[Authors:] Andre F. Rude, Kenneth J. Wayne, pg 8

A New Tool for Old Measurements – and New Ones Too, by Andre F. Rude, Kenneth J. Wayne, pg 9

Automatic Error Plotting – a Report Card for Nonlinear Behavior, by Jonathan D. Garman, pg 10-11

[Author:] Jonathan D. Garman, pg 11

Machine Tool Evaluation by Laser Interferometer, by Richard R. Baldwin, pg 12-13

[Author:] Richard R. Baldwin, pg 13

An Instant-On Laser for Length Measurement. This specially designed two-frequency laser is rugged, tunes itself instantly, and runs cool, by Glenn M. Burgwald, William P. Kruger, pg 14-16. Laser Interferometer.

[Authors:] William P. Kruger, Glenn M. Burgwald, pg 16

September 1970 v. 22 n.1

Cover: Some of the digital devices that can communicate with each other by means of Model 2570A Coupler/Controller.

A Programmable, Modular, Bidirectional Data Coupler. Instrumentation coupler, automated test system controller, computer interface. This new coupler/controller assumes many identities to create a broad range of new possibilities for system automation, by Gibson F. Anderson, pg 2-6. 2570A.

[Author:] Gibson F. Anderson, pg 6

Instrumentation Systems Controlled by Time-Shared Computers. A coupler/controller and an acoustic coupler can put a large computer into a system at very low cost, by Neal E. Walko, pg 7-9. 2570A.

[Author:] Neal E. Walko, pg 9

Measuring Q – Easier and Faster. Thirty-five years later, Q measurements become easier, with greater Q range and over wider bands, by Shiro Kito, Keiichi Hasegawa, pg 10-16. Boonton Q Meter, 260A, 4342A.

[Authors:] Shiro Kito, Keiichi Hasegawa, pg 16

October 1970 v.22 n.2

Cover: Model 9100 Calculator System and the Model 9160A Card Reader

More Memory for Desktop Calculators. Extended memory unit adds as many as 3472 program steps, by Russell Sparks, pg 2-7. 9100A, 9100B.

Error Indication in the Model 9101A Extended Memory, pg 5

[Author:] Russ [Russell] Sparks, pg 7

Optical Card Reader for Fast Calculator Programming, by Gene Zeller, pg 8-12. 9160A.

[Author:] Gene Zeller, pg 12

Hard Copy Output for the System 9100 Computing Calculators, by Chuck McAfee, pg 13-16. 9120A.

[Author:] Chuck McAfee, pg 16

November 1970 v. 22 n.3

Cover: The directional detector, the frequency converter module, the 2-4 GHz YIG oscillator, the PIN absorptive modulator, and the 0.1-2 GHz amplifier

Sweeping the Microwave Spectrum with Solid-State Sources, by Robert H. Bathiany, Carl J. Enlow, Phillip G. Foster, Stephen Vitkovits, pg 2-8. 8620A, 8621A, 8630A.

[Authors:] Carl J. Enlow, Phillip G. Foster, Robert H. Bathiany, Stephen Vitkovits, pg 8

Microcircuits for the Microwave Sweeper, by Ronald E. Pratt, Robert W. Austin, Arlen Dethiefsen, pg 9-16. 8620A.

[Authors:] Ronald E. Pratt, Robert W. Austin, Arlen E. Dethlefsen, pg 16

December 1970 v.22 n.4

Cover: Crystal plating is a typical process-control application for the 5360A Computing Counter and its new Programmer, Model 5376A

Computing-Counter Measurement Systems. Automated measurements and data processing don’t necessarily require a computer. Systems based on the HP computing counter and a new programmer have computer capabilities but lower-than-computer costs, by David Martin, pg 2-6. 5376A.

[Authors:] Eric M. Ingman, David Martin, pg 6

Programmer is Key to Computing-Counter Systems. This modular programmer provides programmability and interface facilities to go with the computing counter’s arithmetic and precision measurement capabilities, by Eric M. Ingman, pg 7-10. 5376A.

Instruction Repertoire, HP 5376A Programmer, pg 11-12

Measuring Noise and Level On International Telephone Systems, by Jim Plumb, Jacques Holtzinger, pg 13-16. 3556A, 236A.

[Author:] Jim Plumb, Jacques Holtzinger, pg 16

January 1971 v.22 n.5

Cover: Half-module and rack versions of the HP Model 3480A/B

A New High-speed Multifunction DVM. Plug-ins provide true rms ac capability as well as dc and ohms. Reading speed is 1000 per second of ohms and dc, by Lee Thompson, Craig Walter, H. Mac Juneau, pg 2-15. 3480A, 3480B 3481A, 3482A, 3484A.

What is the HP Model 3480A?, pg 12

Electrical Isolation: Coupling from Low to Chassis, pg 13

[Authors:] H. Mac Juneau, Lee Thompson, Craig Walter, pg 16

February 1971 v.22 n.6

HP/CAI. This computer-assisted-instruction or CAI, system makes impressive contributions to the state of the art of CAI. It’s a combination of field-proven hardware, a standard computer language, and well tested curricula. The first curriculum is an elementary mathematics drill and practice program, by Samuel D. Edwards, William G. Ansley, pg 2-10

HP/CAI – In the Beginning, pg 3. Computer-Assisted-Instruction.

HP/CAI – The Future, pg 9. Computer-Assisted-Instruction.

[Authors:] William G. Ansley, Samuel D. Edwards, pg 10

Distortion in Complementary-Pair Class-B Amplifiers. In which the author develops, among other things, a new treatment of crossover distortion, by B. M. Oliver, pg 11-16

[Author:] Dr. Bernard [Barney] M. Oliver, pg 16

March 1971 v.22 n.7

Cover: One of the reactors at General Electric Company’s Vallecitos Nuclear Center.

On-Line Data Reduction for Nuclear Analyzers. Sniffing out minute amounts of radioactivity in our environment is just one of the talents of the versatile multichannel analyzer. Here are four multichannel analyzer systems – two of them brand new – that include on-line computing devices capable of anything from straight number crunching to completely automating the analysis, by Jonathan R. Cross, James A. Doub, John M. Stedman, pg 2-10. 5406B, 5402A.

Identifying Radioactive Materials. How multichannel analyzers work and why they need on-line data reduction, pg 4

The Systems in Action. In the following paragraphs each of the four types of multichannel-analyzer systems is described in more detail and examples are given to illustrate what each system can do, pg 5

Multichannel Analyzers and People, pg 6

[Authors:] Jonathan R. Cross, John M. Stedman, James A. Doub, pg 10

Very High and Very Low Resistances – Why and How They Are Measured. These extremes of the resistance range can tell a great deal about properties of materials and the quality of semiconductor contacts, by Yoshihisa Kameoka, Jean E. Bonhomme, pg 11-16. 4329A, 16008A, 4328A.

[Authors:] Yoshihisa Kameoka, Jean E. Bonhomme, pg 16

April 1971 v.22 n.8

Cover: Model 1930A Pseudo-Random Binary Sequence Generator

Manipulating Digital Patterns with a new Binary Sequence Generator, by Edward S. Donn, pg 2-8. 1930A.

[Author:] Edward S. Donn, pg 8

How to Make a Nuclear Spectrum Hold Still. It’s simple with this new digital spectrum stabilizer, by Steven Upshinsky, pg 9-11. 5586A.

[Author:] Steven Upshinsky, pg 11

Astronomers Find Optical Timing of Pulsars More Accurate. Measuring light pulses instead of radio pulses yields more accurate information about pulsar characteristics, by Laurence D. Shergalis, pg 12-13.

[Author:] Stephen [Steve] F. Adam, pg 16

Programmable Step Attenuators Use Distributed-Thin-Film Attenuator Cards. New programmable Step Attenuators employ a special transmission-line configuration with common outer conductors, so only center conductors need to be switched, by Stephen F. Adam, pg 14-16. 33300 Series, 33300A, 33300B, 33300C, 33300D, 33301A, 33301B, 33301C, 33301D, 33304A, 33304B, 33304C, 33304D, 33305A, 33305B, 33305C, 33305D.

May 1971 v.22 n.9

Cover: Dry lake bed dramatizes ability of new 1700-series Oscilloscopes to bring lab scope performance anywhere it may be needed

A Power-Thrifty Portable Oscilloscope. A big step forward in battery-powered scope performance – up to 75 MHz bandwidth with dual-trace operation and delayed sweep – is taken by the new 1700-series Oscilloscopes, by Thomas K. Bohley, Donald R. Bloyer, Robert E. Mast, pg 2-10. 1700A, 1701A, 1707A.

No-Fuss Trigger Circuit, pg 6

High-Efficiency Power Supply, pg 6

Low-Power Amplifier, pg 7

[Authors:] Bob Mast, Tom Bohley, Don Bloyer, pg 9

NBS Publishes Revised List of Physical Constants, pg 11

Effective Stripline Device Characterization. Characterizing stripline devices for high-frequency designs requires more than elegant instrumentation – demands placed on the device-handling hardware are surprisingly severe, by George R. Kirkpatrick, pg 12-16. 11608A, 8746A.

[Author:] George R. Kirkpatrick, pg 16

June 1971 v.22 n.10

Cover: Rotational microwave spectroscopy gives exact information about the structures of molecules

The Routine Rotational Microwave Spectrometer. For the first time, it’s now a simple matter to get high-quality data using this 30-year-old technique. A new spectrometer makes the centimeter-wavelength region of the spectrum available for routine analytical work, by Howard W. Harrington, John R. Hearn, Roger F. Rauskolb, pg 2-12. 8460A.

Everything You Always Wanted to Know About Rotational Microwave Spectroscopy, pg 4

New HP Division for Physics and Physical Chemistry, pg 6

[Authors:] Howard W. Harrington, John R. Hearn, Roger F. Rauskolb, pg 12

An Easy Way to Analyze Graphs, by Ivar W. Larson, Dean C. Millett, pg 13-16. 9107A.

[Authors:] Ivar W. Larson, Dean C. Millett, pg 16

July 1971 v.22 n.11

Cover: The 9401B Digital Test Unit, heart of a new digital test subsystem that multiples the capabilities of these modular computer-controlled systems

General-Purpose Test System Gets Digital Capability. HP’s most general-purpose computerized automatic test system can now test digital and analog/digital electronic devices as well as purely analog devices. A new subsystem gives it a functional logic test capability, by Leif Gudnitz, Homer Tsuda, pg 2-9. 28035A.

Digital Testing versus Digital Testing, pg 4

Software Drivers and BASIC Statements for Digital Testing, pg 7

[Authors:] Leif Gudnitz, Homer Tsuda, pg 9

Optical Power Measurements Made Easy. This new low-cost radiant flux meter system gives direct radiometric measurements in the infrared, visible, and ultraviolet regions of the spectrum. It zeros and calibrates itself too, by Michael R. Mellon, Charles L. Hicks, pg 10-16. 8330A, 8334A

Multitudinous Applications, pg 14

Units of Optical Power, pg 15

[Authors:] Charles L. Hicks, Michael R. Mellon, pg 16

August 1971 v.22 n.12

Cover: A 5300A mainframe, a 5310A battery pack, a 5303A 500 MHz counter module and a makeshift antenna

Lilliputian Measuring System Does Much, Costs Little. A mainframe costing less than $400, a choice of four functional snap-on modules including a 500-MHz counter, and an unusual battery pack are the elements of this rugged, portable, MOS/LSI/LED instrument system, by Ian T. Band, Hans J. Jekat, Eric E. May, pg 2-12. 5300A, 5301A, 5302A, 5303A, 5304A, 5310A.

A Package for Portability and Serviceability, pg 9

[Authors:] Eric E. May, Hans J. Jekat, Ian T. Band, pg 11

An Almost All-Solid-State Strip-Chart Recorder. Linear motor pen drive replaces complex servo system with only one moving part, by Charles K. Michener, pg 13-16. 7123A, 7123B, 7143A, 7143B.

[Author:] Charles K. Michener, pg 16

September 1971 v.23 n.1

The Spectrum Analyzer, Oscilloscope For the Frequency Domain: A Special Issue. As the HP spectrum analyzer family adds new members, frequency range now extends from 20 Hz to 40 GHz. There are new tracking generators and a preselector. The family is reviewed, its new additions elaborated, pg 2-3

A Fully Calibrated, Solid State Microwave Spectrum Analyzer. Microwave spectrum analysis with performance advantages previously associated only with lower frequency instruments, by Richard C. Keiter, pg 4-9. 8555A.

[Author:] Richard C. Keiter, pg 9

Tracking Generators. Tracking generators, working with spectrum analyzers, expand measuring ability, by John Page, pg 10-11. 8444A.

[Author:] John R. Page, Jr., pg 11

A Low Frequency Spectrum Analyzer. Fully calibrated spectrum analysis now is extended downwards to 20 Hz, by Irving H. Hawley, Jr., pg 12-15. 8556A, 8553B, 8554L, 8555A, 8443A, 8444A, 8445A.

[Author:] Irving H. Hawley, Jr., pg 15

October 1971 v.23 n.2

Cover: Inside the new 2100A Computer is another computer, the microprocessor, most of which fits on the two boards shown here

Price, Performance, Architecture, and the 2100A Computer. Here are the why’s behind the design of HP’s new minicomputer, by Fred F. Coury, pg 2-3

[Author:] Fred F. Coury, pg 3

Microprogramming, ROMs, Firmware and All That. Behind the scenes in HP’s new mini is a sophisticated microcomputer with its own instruction repertoire and an expandable memory, by Charles T. Leis, pg 4-9. 2100A.

ROM Simulator Tests Computer in Five Minutes, pg 8

[Author:] Charles T. Leis, pg 9

A Lot of Memory in a Small Space. This new core memory is fast, rugged, reliable and small enough to expand to 32K words inside the 2100A mainframe, by Robert J. Frankenberg, pg 10-12. 2100A.

[Author:] Robert J. Frankenberg, pg 12

A Bantam Power Supply for a Minicomputer. How do you get a 500 watt power supply with several regulated dc output voltages into half a cubic foot of space?, by Richard D. Crawford, Gregory Justice, pg 13-15

[Authors:] Richard D. Crawford, Gregory Justice, pg 15

UTC Time Scale to Change in 1972, pg 16. Coordinated Universal Time, GMT ,Greenwich Mean Time.

November 1971 v.23 n.3

Cover: Model 1810A Sampling Oscilloscope plug-in

A Scrutable Sampling Oscilloscope. Some find sampling scopes enigmatic, choosing to forego their high-frequency response and sensitivity rather than use them. Here’s a sampling scope for people who don’t like sampling scopes. New circuit ideas make it as easy to use as a real-time scope, by William Farnbach, pg 2-8. 1810A.

[Author:] William Farnbach, pg 7

Frequency Stability Measurements by Computing Counter System. Here are methods for making either time-domain or frequency-domain measurements conveniently, accurately, and with high resolution, by David Martin, pg 9-14

[Author:] David Martin, pg 14

More Informative Impedance Measurements, Swept from 0.5 to 110 MHz. An accessory Probe converts the Model 8407A Network Analyzer into a vector impedance measuring system that gives instantaneous swept display of a component’s or network’s complex impedance versus frequency. The system compensates for the effects of the Probe’s own capacitance and inductance on the measurement., by Julius K. Botka, pg 15-19. 11655A.

[Author:] Julius K. Botka, pg 19

New UTC System, pg 20. Coordinated Universal Time.

Time Step and Elimination of the Frequency Offset of the UTC System, pg 20. Coordinated Universal Time.

December 1971 v.23 n.4

Cover: John Shanahan and Hamilton Chisholm present a new signal generator that’s also a versatile synthesizer

Uniting Signal Generation and Signal Synthesis. A simultaneous solution is devised to the problems of signal generation and signal synthesis, while optimizing both for bench and automatic use, by John C. Shanahan, pg 2-13. 8660A, 8660B.

[Author:] John C. Shanahan, pg 13

The Indirect Synthesis Approach. There are many advantages but some disadvantages, pg 7

Remote Laser Interferometry. This unique remote interferometer, affectionately dubbed The Magic Cube, significantly improves the stability, accuracy, and scope of laser interferometer measurements, by Richard R. Baldwin, Andre F. Rude, Gary B. Gordon, pg 14-20. 10565A.

Magic Cube and Modules Make Many Measurements, pg 16. 10565A.

[Authors:] Richard R. Baldwin, Andre F. Rude, Gary B. Gordon, pg 20

January 1972 v.23 n.5

Cover: A new computerized catheterization lab measurement system

A Computer-aided Hospital Systems for Cardiac Catheterization Procedures. Computer reduction of data acquired during cardiac catheterization eliminates considerable pencil and paper computation, a significant time-saver for the physician. Simultaneously, it guarantees highly sophisticated measurements while shortening a normally lengthy procedure, a less disquieting experience for the patient, by John L. Fanton, pg 2-7. 5690A.

The Cath Lab, pg 3. Cardiac catheterization.

Finding a Good Waveform, pg 6

[Author:] John L. Fanton, pg 7

Clip-and-Read Comparator Finds IC Failures. Here’s a clever new tool for troubleshooting digital integrated-circuit equipment, by Mark Baker, Jesse Pipkin, pg 8-12. 10529A.

Probe, Clip, Comparator – Three Complementary IC Logic Testers, pg 11

[Authors:] Mark Baker, Jesse Pipkin, pg 12

The Well-Modulated Synthesizer. While preserving synthesizer qualities, means are found to modulate output widely, precisely, and remotely, by James E. Stinehelfer, pg 13-16. 8660, 86632A, 86631A.

[Author:] James E. Stinehelfer, pg 16

February 1972 v. 23 n.6

Cover: New HP Automatic Spectrum Analyzer can detail the scene, identify alarm conditions and offer further options

Introducing the Automatic Spectrum Analyzer. Under computer control a modern spectrum analyzer becomes an entirely new instrument, by Michael Cunningham, Lynn Wheelwright, pg 2-6. 8580A.

[Authors:] Lynn M. Wheelwright, Michael Cunningham, pg 6

Organizing the Automatic Spectrum Analyzer System. Organization determines the usefulness of the system’s many capabilities, by William H. Shaffer, pg 7-9. 8580A.

[Author:] William H. Shaffer, pg 9

Automating the 10-MHz-to-18-GHz Receiver. As it is automated, the spectrum analyzer not only acquires computer programmability but also some improvements in basic performance, by Steven Neil Sanders, pg 10-13. 8580A.

[Author:] Steven [Steve] Neil Sanders, pg 13

Hewlett-Packard’s Barney Oliver and John Cage Write the Book. No one or two authorities on instrumentation could alone have produced the new McGraw-Hill text “Electronic Measurements and Instrumentation” which Oliver and Cage have edited, pg 14-16

Fine-line Thermal Recording on Z-fold Paper, by Walter R. McGrath, Arthur Miller, pg 17-20

Position Feedback for Galvanometer Fidelity, pg 18. 7414A, 7754A.

New Recorders Use Hot-tip Writing, pg 20

[Authors:] Walter McGrath, Jr., Arthur Miller, pg 20

March 1972  v.23 n.7

Cover: Microwave Communications Repeater

Time Domain Reflectometry in Narrowband Systems, by Gene A. Ward, pg 2-7. TDR, 1580A.

[Author:] Gene A. Ware, pg 7

Measuring High-value Capacitors. High-capacitance electrolytics have been difficult to measure. New circuit developments make “touch and read” measurements possible, by Yoshihisa Kameoka, pg 8-13. 4350A, 4350B.

[Author:] Yoshihisa Kameoka, pg 12

Measuring True RMS AC Voltages to 100 MHz. Broadband measurements of true rms voltage used to be costly or inaccurate or both, by J. B. Folsom, pg 14-20. 3403A.

[Author:] J. B. Folsom, pg 20

April 1972 v.23 n.8

Cover: HP’s new ECG Telemetry System

An Effective ECG Telemetry System. Replacing direct wiring with an RF telemetry link benefits a monitored cardiac patient by releasing him from the confines of a bed, but it could create some additional problems for the nursing staff. The ECG Telemetry System deftly overcomes these problems, by James L. Larsen, Richard F. Dillman, Alfred Nardizzi, Richard Tverdoch, pg 2-9. 78100A, 78101A.

Why ECG Telemetry? Pg 3

The Importance of Slew-Rate Limiting, pg 6

[Authors:] James L. Larsen, Richard Dillman, Alfred M. Nardizzi, Richard Tverdoch, pg 9

A Human Interface for Automatic Measurement Systems. This system console enhances a user’s ability to operate a measurement system that features a magnetic tape cassette operating system and an interactive graphic display, by Kenneth A. Fox, Marc P. Pasturel, Peter S. Showman, pg 10-17. 8500A.

[Authors:] Kenneth A. Fox, Marc P. Pasturel, Peter S. Showman, pg 17

An Agile Graphic Display Device. The new Graphic Displays have a display area of 11×15 inches, 0.02 inch spot size, 50 ft-L brightness, less than 1 ms large-step jump and settling time – until now no display device could simultaneously meet all these requirements,  by John Riggen, Douglas Fogg, pg 18-24. 1310A, 1311A.

What about Storage Displays? Pg 21

[Authors:] John W. Riggen, O. Douglas Fogg, pg 23

Appendix: Equalizing Power Dissipation in an Electronic Attenuator, pg 23

May 1972 v.23 n.9

Cover: The fast, precise linear-motor actuator and head carriage assembly that moves the read/write heads in Model 7900A Disc Drive

A Faster, Tougher Disc Drive for Small Computer Systems. Here’s a high-performance cartridge disc drive that doesn’t have to be treated like a baby. It’s the only peripheral storage device most small computer systems need, by James E. Herlinger, James R. Barnes, pg 2-5. 7900A.

About Disc Drives, pg 4

[Authors:] James E. Herlinger, James R. Barnes, pg 5

Inside the 7900 Disc Drive. Here’s what makes it fast, accurate, rugged and reliable, by James E. Herlinger, William J. Lloyd, pg 6-11 7900A, 7901A.

[Author:] William J. Lloyd, pg 11

Reading and Writing on the Fast Disc. Specially designed wide-temperature range heads and a phase-locked loop help guarantee reliable data transfer, by William I. Girdner, Wallace H. Overton, pg 12-14. 7900.

[Authors:] William I. Girdner, Wallace H. Overton, pg 14

An Efficient Disc Drive/Computer Interface. The I/O structure minimizes bulk, system cost, and computer overhead, but doesn’t get in the way of drive performance, by Donald J. Bowman, pg 15-16. 7900.

[Author:] Donald J. Bowman, pg 16

Narrowband Noise Immunity in a Broadband Gain-Phase Meter. Phase response, as necessary as gain for complete understanding of circuit behavior, has often been ignored for reasons of convenience. A new Gain-Phase Meter, with its attach-and-read operating simplicity, promises to make phase measurements as routine as voltage measurements. Despite its broad bandwidth (1 Hz to 13 MHz), the new instrument has much of the ability of narrowband phase-meters to suppress the effects of noise, by Raymond C. Hanson, pg 17-20. 3575A.

[Author:] Raymond C. Hanson, pg 20

June 1972 v.23 n.10

Cover: Dr. Dennis R. Clark of the Stanford University Department of Pharmacology with his HP-35 Pocket Calculator

The ‘Powerful Pocketful’: an Electronic Calculator Challenges the Slide Rule. This nine-ounce, battery-powered scientific calculator, small enough to fit in a shirt pocket, has logarithmic, trigonometric, and exponential functions and computes answer to 10 significant digits, by Thomas M. Whitney, France Rode, Chung C. Tung, pg 2-9. HP-35.

Operational Stacks and Reverse Polish Notation, pg 5

How the HP-35 Compares with the Slide Rule, pg 7

[Authors:] France Rode, Thomas [Tom] M. Whitney, Chung C. Tung, pg 9

Algorithms and Accuracy in the HP-35. A lot goes on in that little machine when it’s computing a transcendental function, by David S. Cochran, pg 10-11

[Author:] David [Dave] S. Cochran, pg 11

Packaging the Pocket Calculator. The industrial design of the HP-35 was of primary importance, often taking precedence over electrical considerations, by Edward T. Liljenwall, pg 12-13

[Author:] Edward [Ed] T. Liljenwall, pg 13

New Capabilities in Digital Low-Frequency Spectrum Analysis. A new Fourier analyzer and two fast-transform peripherals adapt to a wide range of applications, by Stephan G. Cline, Norman D. Marschke, pg 14-20. FFT, 5451A, 5470A, 5471A.

See Also: Correction: Regarding a speed-up analyzer in  “New Capabilities in Digital Low-Frequency Spectrum Analysis”, page 23 in the August 1972 issue

The Where and How of Fourier Analyzers, pg 18

[Authors:] Stephan [Steve] G. Cline, Norman [Norm] D. Marschke, pg 20

July 1972 v.23 n.11

Cover: HP’s new Automatic Synthesizer

The Synthesized Test Oscillator – A New Signal Source for the 0.1 Hz-13 MHz Range. Programmability, high accuracy in frequency and level setting, waveform purity – these are some of the capabilities now being asked of wide-range signal sources. Meeting these needs requires something other than a traditional RC oscillator, by Ronald K. Tuttle, pg 2-8. 3320A, 3320B.

[Author:] Ronald K. Tuttle, pg 8

Party-line Programming, pg 8

The Incremental Sweep Generator – Point-by-Point Accuracy with Swept-Frequency Convenience. Putting a calculator in a 0.1 Hz-to-13 MHz Frequency Synthesizer gives the lab bench the speed and convenience of automatic testing. Amplitude sweeping adds a new dimension, by Charles A. Kingsford-Smith, pg 9-15. 3330B, 3330A.

[Author:] Charles Kingsford-Smith, pg 15

Microprogramming and Writable Control Store. Here’s what these powerful but little-understood features of the HP 2100A minicomputer mean to the user, by Fred F. Coury, pg 16-20. 12908A.

[Author:] Fred F. Coury, pg 20

August 1972 v.23 n.12

Cover: The new Model 3490A Digital Multimeter

Compactness and Versatility in a New Plug-Together Digital Multimeter. A new 4 1/2 digit Multimeter is constructed in sections that plug together to form a compact instrument, giving the user a choice of capabilities, by Albert Gookin, pg 2-6. 3470, 34740A, 34702A, 34701A.

[Author:] Albert Gookin, pg 6

A New Five-Digit Multimeter that can test itself. Along with 5-digit resolution, guarded inputs and other attributes of a precision multimeter, this one has an enhanced confidence factor: it can interrogate itself to verify that all goes well, by Lee Thompson, pg 7-12. 3490A.

[Author:] Lee Thompson, pg 12

Functional Modularity Helps Designer and User of New Measurement and Control Subsystem. A method of allocating functions to modules in a system, functional modularity gives a new industrial system-in-a-box a high degree of versatility at reasonable cost, by James M. Kasson, pg 13-19. 2440A. 9600.

Modular Systems for Sensor-Based Data Acquisition and Control, pg 15

Unusual Pacer Excels in System Timing, pg 17

[Author:] James [Jim] M. Kasson, pg 19

Multiprogrammer Magnifies Minicomputer I/O Capacity. When you have an automatic system with dozens or hundreds of devices to control and monitor, and only a minicomputer to do the job, this minicomputer I/O extender can help, by John Mickowski, pg 20-24. 6940A, 6941A.

[Author:] John Mickowski, pg 23

Correction: Regarding a speed-up analyzer in  “New Capabilities in Digital Low-Frequency Spectrum Analysis”, page 14 in the June 1972 issue, pg 23

September 1972 v.24 n.1

Cover: The Logic Pulser and the Microwave Link Analyzer

Logic Pulser and Probe: A New Digital Troubleshooting Team. A new Logic Pulser in a probe package injects pulses onto digital circuit nodes without disconnecting IC outputs. A new Logic Probe detects pulses, high and low levels, and open circuits or bad levels, by Robin Adler, Jan R. Hofland, pg 2-7. 10526T, 10525T.

Two Troubleshooting Kits, pg 6. 5015T, 5011T.

[Authors:] Robin Adler, Jan R. Hofland, pg 7

A New Microwave Link Analyzer with High-Frequency Test Tones. Microwave link nonlinearities yield their secrets to high-frequency test tone probing. Agreement can now be obtained between swept measurements and white noise tests, by Reid Urquhart, pg 8-16. 3702B, 3710A.

Microwave Radio Communications and Performance Measurements, pg 10-11

Appendix: Derivative and Differential Measurements, pg 16

[Author:] Reid Urquhart, pg 16

MLA Measures RF Performance with Down Converter. Using this addition to the HP Microwave Link Analyzer gives new insights into microwave link performance, by Michael Crabtree, pg 17-18. 3730A.

[Author:] Michael Crabtree, pg 18

Communications-Oriented Microwave Solid-State Sweeper. One use is as an up-converter with the HP Microwave Link Analyzer to make RF measurements, by Arlen E. Dethlefsen, pg 19-20. 8605A.

[Author:] Arlen E. Dethlefsen, pg 20

October 1972 v.24 n.2

Cover: The time is coming when a group of test instruments can easily be made to work as one by linking them together digitally through a new interface system.

A Practical Interface System for Electronic Instruments. Connecting instruments into a digitally-controlled system now becomes a matter of plugging in cables. This article describes the interface system that makes this possible, by Gerald E. Nelson, David W. Ricci, pg 2-7

[Authors:] Gerald [Jerry] E. Nelson, David [Dave] W. Ricci, pg 7

A Common Digital Interface for Programmable Instruments: The Evolution of a System. HP’s corporate interface engineer describes the trends, philosophy, and ancestors that have helped define the new HP instrument interface system, by Donald C. Loughry, pg 8-11

[Author:] Donald [Don] C. Loughry, pg 11

Faster Gain-Phase Measurements with New Automatic 50Hz-to-13MHz Network Analyzers. Complete characterization of networks in the frequency domain now becomes faster and more convenient than ever, by Gerald E. Nelson, Paul L. Thomas, Robert L. Atchley, pg 12-20. 3570A.

The Analog Story, pg 14-15

The Digital Story, pg 16

Programming Economy, pg 19

[Authors:] Robert [Bob] L. Atchley, Paul L. Thomas, pg 19

 

November 1972 v.24 n.3

Cover: HP’s new “voltmeter for the microwave engineer”

A “Voltmeter” for the Microwave Engineer. It makes swept insertion and return loss measurements simultaneously, over a wide frequency range, by Hugo Vifian, Frank K. David, Wayne L. Frederick, pg 2-7. 8755L.

Evolution of Diode Detector, by Frank K. David, pg 4-5

The Well-Matched Modulator, by Wayne Frederick, pg 6

[Authors:] Frank K. David, Wayne L. Frederick, Hugo Vifian, pg 7

Versatile Display Unit Extends Correlator Capability. Together this new Spectrum Display and an HP Correlator form a versatile and economical instrument for analyzing signals and systems in the time and frequency domains simultaneously, by David J. Morrison, Brian W. Finnie, Rajni S. Patel, Kenneth H. Edwards, pg 8-15. 3720A.

Appendix: Effects of Input Quantization, pg 14

[Authors:] David J. Morrison, Brian W. Finnie, Rajni S. Patel, Kenneth [Ken] H. Edwards, pg 15

Voltage Precision and High Current Capability – Both in One Power Supply. This new family of power supplies combine the accuracy of a calibrator with brute force power, by George G. Emmermann, pg 16-20. 6104A, 6114A, 6105A, 6115A.

[Author:] George G. Emmermann, pg 20

December 1972  v.24 n.4

Cover: Models 10, 20 and 30 [9800 Series] are three quite different calculators for a diversity of users with a diversity of calculating capabilities

A New Series of Programmable Calculators. The three calculators and many peripherals of the 9800 Series are designed to handle the broadest possible range of applications. Flexibility and expandability are emphasized, by Richard M. Spangler, pg 2-4.

[Author:] Richard M. Spangler, pg 4

Model 10 Maintains Compatibility, Expands Capability, by Curtis D. Brown, Jack M. Walden, pg 5-7. 9800 Series.

[Authors:] Curtis [Curt] D. Brown, Jack M. Walden, pg 7

Interactive Model 20 Speaks Algebraic Language, by Rex L. James, Francis J. Yockey, pg 8-13. 9800 Series.

Printer and Keyboard for Models 10 and 20, pg 11. 9800 Series.

[Authors:] Rex L. James, Francis [Frank] J. Yockey, pg 13

BASIC-Language Model 30 Can be Calculator, Computer or Terminal, by Richard M. Spangler, pg 14-18. 9800 Series.

9800 Processor Incorporates 8-MHz Microprocessor, by Henry J. Kohoutek, pg 19-22

[Author:] Henry J. Kohoutek, pg 22

All-Semiconductor Memory System Includes Read-Only and Read/Write Chips, by Calvin L. Finn, pg 22-24. 9800 Series.

[Author:] Calvin L. Finn, pg 24

Versatile Input/Output Structure Welcomes Peripheral Variety, by Gary L. Egan, pg 24-27. 9800 Series.

[Author:] Gary L. Egan, pg 27

Development of the 9800 Series, by Robert E. Watson, pg 27-28

January 1973 v.24 v.5

Cover: The new HP 3000 Computer System

An Economical Full-Scale Multipurpose Computer System. This is the first 16-bit computer system to have a hardware stack architecture and virtual memory. It handles time-sharing, batch processing, and real-time operations in several languages concurrently, by Bert E. Forbes, Michael D. Green, pg 2-6. 3000.

A Computer for All Reasons, pg 7. 3000.

[Authors:] Bert E. Forbes, Michael [Mike] E. Green, pg 8

Central Bus Links Modular HP 3000 Hardware. Sharing the bus can be one or more CPU’s, I/O processors, memory modules, high-speed I/O channels and special devices. The microprogrammed CPU’s have a procedure-oriented stack architecture, by Jamshid Basiji, Arndt B. Bergh, pg 9-14

[Authors:] Jamshid [Jim] Basiji, Arndt [Arne] B. Bergh, pg 14

Software for a Multilingual Computer. SPL is a high-level language that produces code that’s as efficient as other systems’ assembly-language code. Other 3000 languages are FORTRAN, BASIC and COBOL, by William E. Foster, pg 15-19

[Author:] William [Bill] E. Foster, pg 19

Single Operating System Serves all HP 3000 Users. The Multiprogramming Executive operating system takes care of command interpretation, file management, memory management, scheduling and dispatching, and input/output management for time-sharing, batch and real-time users, by Thomas A. Blease, Alan Hewer, pg 20-24

[Authors:] Thomas [Tom] A. Blease, Alan Hewer, pg 24

February 1973  v.24 n.6

Cover: HP’s new Model 8640A/B 0.45-550 MHz Signal Generator

A Solid State VHF Signal Generator for Today’s Exacting Requirements. The spectral purity of a vacuum-tube oscillator and the freedom from aging effects characteristic of solid-state oscillators are combined in a new 450 kHz-550 MHz signal generator.  High-quality FM and AM capabilities are included, too, in addition to CW, by Michael S. Marzalek, Larry C. Sanders, Kenneth L. Astrof, Raymond M. Shannon, pg 2-13 8640A, 8640B.

Signal Generators and Radio Receiver Measurements, pg 3

[Authors:] Kenneth [Ken] L. Astrof, Larry C. Sanders, Michael [Mike] S. Marzalek, Raymond [Ray] M. Shannon, pg 13

Computer-Aided Design of Modular Power Supplies. A universal circuit and a computer program – these make it possible to obtain fixed-voltage, modular power supplies in a wide range of output ratings at low cost, but with laboratory-grade performance and reliable operation assured, by Willis C. Pierce, Jr., James S. Gallo, William T. Walker, pg 14-20. 62000.

[Authors:] James [Jim] S. Gallo, William [Bill] T. Walker, Willis [Bill] C. Pierce, pg 20

March 1973 v.24 n.7

Cover: HP Model 5700A Gas Chromatograph

High Performance Flame-Ionization Detector System for Gas Chromatography. A new electrometer circuit plus improvements in mechanical design bring a higher level of performance to a widely-used technique for chemical analysis, by Douglas H. Smith, pg 2-10. 5700A.

Gas Chromatography, pg 4-5

The 5700A-series Gas Chromatographs, pg 8

[Author:] Douglas [Doug] A. Smith, pg 10

Synthesized Signal Generation to 1.3 GHz. Because they maintain quartz-crystal stability at all frequencies over a wide range, frequency synthesizers find growing use in testing procedures. With the system described here, synthesizer applications can now extend well into the UHF range, by Bradley Stribling, Young Dae Kim, Roland Hassun, Dieter Scherer, Melvin Humpherys, Charles Cook, pg 11-19. 86602A.

A 0.1 to 1300 GHz Amplifier, pg 15

[Authors:] Dieter Scherer, Young Dae Kim, Charles W. Cook, Melvin [Dee] D. Humpherys, Bradley [Brad] C. Stribling, Roland [Rolly] Hassun, pg 19

A Greater Range of Capabilities for the Compact, Plug-on Digital Multimeter. Higher sensitivity for voltage and resistance measurements, 5-digit resolution and a new “set range” concept are given the inexpensive 3470 Measurement System by new plug-on modules, by Arthur Dumont, Stephen Venzke, Reid Gardner, pg 20-24. 3470, 34703A, 34740A, 34750A.

[Authors:] Arthur [Art] J. Dumont, Stephen [Steve] B. Venzke, Reid J. Gardner, pg 24

April 1973 v.24 n.8

Cover: Behind the type N connector on the front panel of Model 5340A Frequency Counter is the assembly shown here: a power splitter followed by two wide-band thin-film hybrid samplers and other elements of two phase-locked loops

A High-Performance Automatic Microwave Counter. This new counter needs only a single input to measure 10Hz to 18 GHz, and its sensitivity is many times better than previous counters. It’s also systems compatible, by Richard F. Schneider, pg 2-9. 5340A.

[Author:] Richard [Dick] F. Schneider, pg 8

A dc-to-20-GHz Thin-film Signal Sampler for Microwave Instrumentation. This rugged, miniature, wideband sampler is responsible for many of the advanced capabilities of the new Model 5340A Microwave Counter, by Jerry Merkelo, pg 10-13

[Author:] Jerry Merkelo, pg 13

Automating the Calibration Laboratory.  This new family of systems, combining standard and specially developed hardware and software, greatly reduces instrument calibration times without sacrificing precision or thoroughness, by John L. Minck, E. Robert Aikin, pg 14-24. 9550.

Some Definitions for Calibration Laboratory Work, pg 17

Novel Procedures Speed Automatic Calibrations, pg 18-19

Observations from an Operating System, pg 23

[Authors:] John L. Minck, E. Robert [Bob] Aikin, pg 23

May 1973 v.24 n.9

Cover: Ray Hutchinson at the Pacific Stock Exchange holding a HP-80 Business Pocket Calculator

A Pocket-Sized Answer Machine for Business and Finance. This new nine-ounce, battery-powered calculator replaces most commonly used financial tables, such as compound interest, annuities and bonds. It’s also a 200-year calendar, by William L. Crowley, France Rode, pg 2-9. HP-80.

[Authors:] France Rode, William [Bill] L. Crowley, pg 9

Laboratory Notebook: Thick Films Widen Attenuator Response, by Thomas Zamborelli, pg 9

A More Rugged, Cleaner Writing Oscillographic Ink Recorder. This new oscillographic recording system features a reliable low-pressure ink system, instant-dry near-black ink, plug-in versatility and a rugged, serviceable design, by Lawrence Brunetti, pg 10-17. 7402A.

Single-Channel 100-mm-Wide Recording, pg 14

Appendix: Dynamic Writing System Analysis, pg 15-16

[Author:] Lawrence [Larry] Brunetti, pg 17

A Quiet, Low-Cost, High-Speed Line Printer. This thermal printer writes 80 column lines at 250 lines per minute. Developed primarily for the 9830A Calculator, it’s a general-purpose printer that’s easily interfaced to a variety of controllers, by Dick B. Barney, James R. Drehle, pg 18-24. 9866A.

The Thermal Printhead Story, pg 23. 9866A.

[Authors:] Dick B. Barney, James [Jim] R. Drehle, pg 24

June 1973 v.24 n.10

Cover: The tweezers hold a new monolithic silicon-on-glass diode quad

Schottky-Barrier Diodes Structured for Better High-Frequency Performance. Connecting discrete components into thin-film hybrid circuits becomes increasingly difficult as the demand for higher frequencies gives rise to smaller components. Described here is a way of fabricating diodes to gain high frequency performance without imposing severe mechanical limitations, by Raymond A. Morris, Jack H. Lepoff, pg 2-6. 5082-2709, -2716, -2768, -2769.

[Authors:] Jack H. Lepoff, Raymond [Ray] A. Morris, pg 6

DMM and DAC Modules Expand Low-Cost Measuring System. A five-digit multimeter/counter module and a three-digit digital-to-analog converter module are new members of the 5300 Measuring System joining the mainframe, battery pack, and four timer/counter modules previously available, by Lewis W. Master, James F. Horner, P. Thomas Mingle, pg 7-15. 5306A.

Which Multimeter? pg 9 5306A, 3470.

A Compact, Three-Digit Digital-to-Analog Converter Module, pg 11-12

Appendix: 5306A Noise Rejection Characteristics, pg 14

[Authors:] James [Jim] F. Horner, Lewis [Lew] W. Masters, P. Thomas [Tom] Mingle, pg 15

Laser/Calculator System Improves Encoder Plate Measurements. This in-house system is a good example of what the right combination of instruments and calculator can do for measurements. Developed for acceptance testing of the optical position-encoder plates used in HP moving-head disc drives, its speed and accuracy have helped improve yields from the original 20% to the present 90%, by Glenn O. Herreman, pg 16-18. 9820A, 5526A.

Calculator with Metrology Programs Now a Laser Option, pg 18. 9820A.

[Author:] Glenn O. Herreman, pg 18

Instrument Basics Without Pain. Engineers and non-engineers in science and technology have one thing in common: they need to understand electronic instruments. Hewlett-Packard’s Clyde Coombs has assembled a book that answers the need, by Ross Snyder, pg 19-20. Basic Electronic Instrument Handbook.

July 1973 v.24 n.11

Cover: The monochromator assembly, crystal disperser, electron lens and detector assembly from Model 5950A ESCA Spectrometer

A Second-Generation ESCA Spectrometer. Monochromatized x-rays, a dispersion compensated electron optical system and an improved detection system enhance the sensitivity and resolution of a powerful analytical technique – Electron Spectroscopy for Chemical Analysis, by Michael A. Kelly, Charles E. Tyler, pg 2-14. 5950A.

Electronic Spectroscopy for Chemical Analysis, pg 5-6

The Charging Effect, pg 10. 5950A.

[Authors:] Charles [Check] E. Tyler, Michael [Mike] A. Kelly, pg 14

Compact Function Generator with Enhanced Capability/Cost Ratio. A no-frills design plus a computer’s help in verifying zero production defects brings the cost of this handy instrument down without sacrificing quality, by E. Harry Heflin, pg 15-20. 3311A.

Low-Cost Function Generator Circuits, pg 18-19

[Author:] E. Harry Heflin, pg 20

August 1973 v.24 v.12

Cover: The HP 9540 Transceiver Test System helps assure reliability by improving quality control, and lowers test costs, too

Automated Transceiver Testing. A new computerized system is dedicated to production and maintenance testing of mobile transmitters, receivers, and transceivers in the communication bands from 10 MHz to 1000 MHz. Tests conform to EIA standards and include AM, FM, audio, and power tests, by Dimitry A. Bobroff, pg 2-7. 9540.

Shielding and Grounding, pg 6

[Author:] Dimitry [Jim] A. Bobroff, pg 7

Signal Processing Techniques for Automatic Transceiver Testing. Here’s how the 9540 System test transceivers to EIA standards using only a voltmeter and a counter, by Robert G. Huenemann, pg 8-13

Sample Timing Considerations, pg 11-12. 9540.

[Author:] Robert [Bob] G. Huenemann, pg 13

Digitally-Controlled Current Sources for New Ways of Making Automatic Measurements. Using a digitally-controlled current source as the stimulus in automatic test systems simplifies some measurements, improves others, and makes some easy that would be hard to do any other way, by Rene Peerboom, pg 14-20. 6140A, 6145A.

[Author:] Rene Peerboom, pg 19

September 1973 v.25 n.1 [back covers reads v.2 n.1]

Cover: Model 3580A Spectrum Analyzer

A Low-Frequency Spectrum Analyzer that Makes Slow Sweeps Practical. Tuning through a 5Hz-to-50kHz range with a one-hertz bandwidth must be done slowly. This new spectrum analyzer speeds up the process while bringing a number of other conveniences to this class of instrument, by William L. Hale, Gerald E. Weibel, pg 2-13. 3580A.

Precision Discriminator, pg 7

Permanent Waveform Storage, pg 9

Peak-Detecting Analog-to-Digital Converter, pg 10

Adapting a Sweep, pg 12-13

Optimum Sweep Rate, pg 12

[Authors:] Gerald [Jerry] E. Weibel, William [Bill] L. Hale, pg 13

A High-Performance Beam Tube for Cesium Beam Frequency Standards. The benefits are significant improvements in accuracy, short-term stability, settability, and sensitivity to external dc magnetic fields, by Ronald C. Hyatt, Louis F. Mueller, Terry N. Osterdock, pg 14-24. 5061A.

Appendix: Short Term Stability, pg 23

[Authors:] Ronald [Ron] C. Hyatt, Terry N. Osterdock, Louis [Lou] F. Mueller, pg 23

October 1973 v.25 n.2

Cover: Model 5000A Logic Analyzer’s two rows of 32 red light-emitting diodes display digital data occurring at the A and B inputs

The Logic Analyzer: A New Instrument for Observing Logic Signals. Designed specifically to solve digital design and troubleshooting problems, this new instrument provides a digital display with storage, positive and negative digital delay, combinatorial triggering and digital sequence comparison, by Mark Baker, Howard D. Marshall, Robin Adler, pg 2-16. 5000A.

Logic Analyzer Applications in Digital System Waveform Measurements, pg 5-6

Everyday Uses, pg 6

The IC Troubleshooters, pg 12

Stapled within the October 1973 issue: Hewlett-Packard Journal Index: Volumes 20, 21, 22, 23 and 24 – September 1968 through August 1973. PART I: Chronological Index pg 2-5. Part II: Subject Index  pg 6-12. Part III: Model Number Index, pg 13-16 (pages noted here are pages in the index, not in the journal).

[Authors:] Howard D. Marshall, Mark Baker, Robin Adler, pg 15

A Pulse Generator for Today’s Digital Circuits. This new dual-output Pulse Generator produces 16V pulses at high repetition rates and with as much as 16V offset. A new control arrangement makes pulse set-up much simpler, by Horst Link, Reinhard Falke, pg 17-24. 8015A.

[Authors:] Reinhard Falke, Horst Link, pg 24

November 1973 v.25 n.3

Cover: A hand-held digital multimeter has finally become reality

A Self-Contained, Hand-Held Digital Multimeter – A New Concept in Instrument Utility. Aside from clipping the coiled lead to any convenient reference point, only one hand is needed to hold this instrument and take a reading, by Robert L. Dudley, Virgil L. Laing, pg 2-9. 970A.

[Authors:] Virgil L. Laing, Robert [Bob] L. Dudley, pg 9

A Portable High-Resolution Counter for Low-Frequency Measurements. This snap-on functional module for the low-cost 5300 Measuring System makes six-digit measurements of frequencies between 0.833 Hz and 2 MHz. Special features help solve many low-frequency measurement problems, by Kenneth J. MacLeod, pg 10-15. 5307A.

Operation of the digital Programmable Frequency Generator, pg 14

[Author:] Kenneth [Ken] J. MacLeod, pg 15

A High-Speed Pattern Generator and an Error Detector for Testing Digital Systems. The rate at which errors occur in transferring digits through systems operating at bit rates as high as 150 M bits/s can be determined by a new Error Detector working with a new Data Generator, by James Robertson, John Stinson, Thomas Crawford, Ivan Young, pg 16-24. 3760A.

[Authors:] John Stinson, Thomas [Tom] Crawford, James Robertson, Ivan Young, pg 23

December 1973 v.25 n.4

Cover: The new Model 7155A Portable Strip-Chart Recorder

A Go-Anywhere Strip-Chart Recorder that Has Laboratory Accuracy. This rugged, portable recorder is designed to operate in the laboratory, in a moving vehicle or aircraft, in the desert, in freezing temperatures, on battery power or ac of various frequencies, even upside down, always within its laboratory specifications, by Rick A. Warp, Howard L. Merrill, pg 2-8. 7155A.

[Authors:] Rick A. Warp, Howard L. Merrill, pg 8

Telecommunication Cable Fault Location from the Test Desk. This new fault locator automates Wheatstone-bridge methods that have fallen into disuse because they are too cumbersome. The results is fast, easy fault location and better telephone service, by Thomas R. Graham, James M. Hood, pg 9-14. 4913A.

[Authors:] Thomas [Tom] R. Grahma, James [Jim] M. Hood, pg 14

High-Efficiency Modular Power Supplies Using Switching Regulators. The switching regulators’ advantages of smaller size and cooler operation used to be counterbalanced by higher cost, slower transient response and noise, both electrical and acoustical. These new power supplies reduce the disparity significantly, by B. William Dudley, Robert D. Peck, pg 15-20. 62604J-62628J.

[Authors:] B. William [Bill] Dudley, Robert [Bob] D. Peck, pg 20

January 1974 v.25 n.5

Cover: Model 1601L Logic State Analyzer

The Logic State Analyzer – Displaying Complex Digital Processes in Understandable Form. Sixteen consecutive 12-bit works from any part of a data stream are captured and held for display by a new Logic State Analyzer, greatly simplifying the task of monitoring program flow when troubleshooting complex digital processors, by William A. Farnbach, pg 2-9. 1601L.

[Author:] William [Bill] Farnbach, pg 9

A Laser Interferometer That Measures Straightness of Travel. This unique “straightedge” combines the high accuracy of the optical flat with the long range of the laser to achieve submicron resolution over ranges up to 100 feet, by Richard R. Baldwin, David A. Harland, Barbara E. Grote, pg 10-20. 5526A.

Machine Tool Calibration with the Expanded Laser Measurement System, pg 13-14. 5526A

Ray-Trace Program, pg 17-18

[Author:] Richard [Dick] R. Baldwin, pg 19

[Authors:] Barbara E. Grote, David A. Harland, pg 20

February 1974 v.25 n.6

Cover: Model 1220A Oscilloscope

Practical Oscilloscopes at Workaday Prices. 15-MHz bandwidth, 2mV sensitivity, 3% accuracy, sweeps usable to 20ns/div and an 8×10 cm CRT with internal graticule would normally class these oscilloscopes as laboratory instruments but they will find wide use in the service shop, technical school, and industry, by Hans-Gunter Hohmann, pg 2-10. 1220A, 1221A.

[Author:] Hans-Gunter Hohmann, pg 9

Laboratory Notebook. Sharp Cut-off Filters for That Awkward UHF Band, by James Larsen, Richard Dilman, Richard Tverdoch, pg 10

A Data Error Analyzer for Tracking Down Problems in Data Communications. A combined data generator and self-synchronizing receiver, this new instrument makes six different measurements simultaneously, helping to pinpoint sources of trouble in data communications systems, by Jeffrey R. Duerr, pg 11-20. 1645A.

[Author:] Jeffrey [Jeff] R. Duerr, pg 20

March 1974 v.25 n.7

Cover: Model 4271A Digital LCR meter

An Automatic, Precision 1-MHz Digital LCR Meter. This new LCR Meter is especially designed for measurements of low-value components in integrated circuits and thin-film hybrid circuits, as well as of discrete components. It uses a four-pair measurement technique to reduce errors caused by stray capacitance, residual inductance and mutual inductance of the test leads, by Kohichi Maeda, pg 2-9. 4271A.

Phase Error Compensation, pg 6

[Author:] Kohichi Maeda, pg 9

A Moderately Priced 20-MHz Pulse Generator with 16-Volt Output. Suitable for general-purpose use, this instrument also has the pulse amplitude needed for driving the newer CMOS circuits, by Rainer Eggert, Gunter Krauss, pg 10-15. 8011A.

[Author:] Gunter Krauss, pg 14

[Author:] Rainer Eggert, pg 15

Appendix: A Capacitance Multiplier, pg 15

Laboratory Notebook. Logarithmic Amplifier Accepts 100-dB Signal Range, by Robert Jeremiasen, pg 16-17

Versatile VHF Signal Generator Stresses Low Cost and Portability. This high-quality, reliable instrument fits the budget and the performance needs of a variety of users, by Robert R. Hay, pg 18-24. 8654A.

Specifying Signal Generator Noise, pg 21

[Author:] Robert [Bob] R. Hay, pg 23

April 1974 v.25 n.8

Cover: New 9880A/B Mass Memory System for the 9830A Calculator

Mass Memory System Broadens Calculator Applications. Inventory control, payroll, order processing and other large-data-base applications are now within the capability of HP’s most powerful desktop calculator, the BASIC language Model 30, by Chris J. Christopher, Havyn E. Bradley, pg 2-12. 9880A, 9880B.

Mass Memory for Business Applications, pg 4

[Authors:] Havyn E. Bradley, Chris J. Christopher, pg 12

An Easily Calibrated, Versatile Platinum Resistance Thermometer. Unusual features of this digital thermometer are a choice of normal or expanded resolution, linear analog output, interchangeable probes, and many options including a battery pack and digital output, by Tony E. Foster, pg 13-17. 2802A.

[Author:] Tony E. Foster, pg 17

Appendix: Analog Linearization, pg 17

Speeding the Complex Calculations Required for Assessing Left Ventricular Function of the Heart. Adapting computers to medical tasks has been slower than originally anticipated, going step-by-step as truly suitable tasks are identified and implemented. Here’s another example of how a computer can help out when a suitable task is identified, by Peter Dikeman, Chi-ning Liu, pg 18-24. 5693A.

[Authors:] Peter Dikeman, Chi-ning Liu, pg 24

May 1974 v.25 n.9

Cover: The HP-65 – a personal computer

The “Personal Computer”: A Fully Programmable Pocket Calculator. This 11 ounce battery-powered marvel has the computing power of an advanced scientific pocket calculator and is programmable as well, so it can adapt to any number of specialized uses, by Chung C. Tung, pg 2-7. HP-65.

See Also: Correction: To the result for figure 4 on page 10, and to other text in the article “Programming the Personal Computer”, page 17 in the June 1974 issue

A Self-Clocking Two-Track Recording Technique, pg 4

[Author:] Chung C. Tung, pg 7

Programming the Personal Computer. Wherein are revealed the functions of the keys, how problems are solved, and a bit of what goes on inside, by R. Kent Stockwell, pg 8-14. HP-65. See Also: Correction [results for figures] in the June 1974 issue on page 17

Appendix: HP-65 Programmable Pocket Calculator Functions and Operations, pg 14

[Author:] R. Kent Stockwell, pg 14

Designing a Tiny Magnetic Card Reader. Here’s how it was designed and how it works, by Robert B. Taggart, pg 15-17. HP-65.

[Author:] Robert [Bob] B. Taggart, pg 17

Testing the HP-65 Logic Board. The board and its automatic test system are designed for rapid production testing and troubleshooting, by Kenneth W. Peterson, pg 18-20

[Author:] Ken Peterson, pg 20

Economical Precision Step Attenuators for RF and Microwaves. Refinements in edgeline transmission structures and thin-film techniques lead to wideband step attenuators that are smaller and less expensive than previous models, by David R. Veteran, George R. Kirkpatrick, pg 21-24. 8495A, 8495B, 8496A, 8496B.

[Authors:] David [Dave] R. Veteran, George [Bob] Kirkpatrick, pg 24

June 1974 v.25 n.10

Cover: Model 5345A Electronic Counter that advances the art of pulsed RF frequency measurements with frequency averaging

A New Generation in Frequency and Time Measurements. This new general-purpose electronic counter refines the art of frequency and time measurements to an impressive degree by the application of advanced technology, by James L. Sorden, pg 2-8. 5345A.

[Author:] James [Jim] L. Sorden, pg 8

The 5345A Processor: An Example of State Machine Design, by Ronald E. Felsenstein, pg 9-11

[Author:] Ronald [Ron] L. Felsenstein, pg 11

Time Interval Averaging: Theory, Problems, and Solutions, by David C. Chu, pg 12-15

Appendix: Time Interval Estimation in the Presence of Quantization Error, pg 15

[Author:] David [Dave] C. Chu, pg 15

Third Input Channel Increases Counter Versatility, by Arthur S. Muto, pg 16-18. 5353A.

Correction: To the result for figure 4 on page 10, and to other text in the article “Programming the Personal Computer”, page 8 in the May 1974 issue, pg 17

[Author:] Arthur [Art] S. Muto, pg 18

A Completely Automatic 4-GHz Heterodyne Frequency Converter, by Ali Bologlu, pg 19-21. 5354A.

[Author:] Ali Bologlu, pg 21

Interface Bus Expands Instrument Utility, by Bryce E. Jeppsen, Steven E. Schultz, pg 22-24. 5354A, ASCII Programmable Modules, 59301A, 59303A, 59304A, 59306A, 59307A, 59308A, 59309A, 10631A/B/C.

[Authors:] Steven [Steve] E. Schultz, Bryce E. Jeppsen, pg 24

July 1974 v.25 n.11

Cover: IMAGE, a sophisticated new database management system for HP 2100 and HP 3000 Computers, has information management capabilities formerly available only in large computer systems

Powerful Data Base Management System for Small Computers. For the first time, sophisticated data management is available to the user of computers as small as the HP 2100 and HP 3000, by Richard E. McIntire, pg 2-10. IMAGE/3000, QUERY3000, IMAGE/2000, QUERY/2000.

[Author:] Richard [Dick] E. McIntire, pg 10

Why Data Base Management Systems, pg 5

Quality Frequency Counters Designed for Minimum Cost. Lowest possible cost was a major design objective for these counters. But so were high quality, excellent performance, ease of service and efficient production, by Warren J. O’Buch, Lewis W. Masters, pg 11-14. 5381A, 5382A.

[Authors:] Warren J. O’Buch, Lewis [Lew] J. Masters, pg 14

A Versatile Bipolar Power Supply/Amplifier for Lab and Systems Use. The elements of a power supply/amplifier can be combined to perform as several different instruments: a precision bipolar power supply, a fast-responding programmable power supply, a low-distortion current-limiting power amplifier, a power amplifier with programmable gain, by Santo Pecchio, pg 15-19. 6825A, 6827A.

[Author:] Santo Pecchio, pg 19

An Automatic Exposure Control for a Lab-Bench X-Ray Camera. Locating shorted bonding wires in IC’s, checking pad alignment in multilayer circuit boards, and finding much other “inside” information becomes as easy as taking snapshots when you use an industrial x-ray system that has automatic exposure control, by John L. Brewster, pg 20-24. 43805.

[Author:] John Brewster, pg 24

August 1974 v.25 n.12

Cover: Model 4940A Transmission Impairment Measuring Set

Measuring Analog Parameters of Voiceband Data Channels. A new Transmission Impairment Measuring Set combines the measurement capabilities of six separate instruments into one portable package. It measures fifteen parameters affecting data transmission in one-fourth the time formerly required, by Noel E. Damon, pg 2-7. 4940A.

Transient Measurements, by Paul G. Winninghoff, pg 8-9

The 4940A Sine Wave Transmitter, by Richard T. Lee, pg 9-11

Nonlinear Distortion Measurements, by Donald A. Dresch, pg 12-13

Envelope Delay Distortion Measurements, by Johann J. Heinzl, Richard G. Fowles, pg 14-16

Peak-to-Average Ratio Measurements, by Erhard Ketelsen, pg 17-18

[Authors:] Noel E. Damon, Donald [Don] A. Dresch, Richard [Dick] T. Lee, pg 19

[Authors:] Erhard Ketelsen, Richard [Dick] G. Fowles, Johann J. Heinzl, Paul G. Winninghoff, pg 19

Microwave Integrated Circuits Solve a Transmission Problem in Educational TV. An educational TV system using a satellite transmission link needs a state-of-the-art ground-station receiver that doesn’t cost very much. Microwave integrated circuits provide a way, by Arthur Fong, James A. Hall, Douglas J. Mellor, Richard D. Pering, pg 20-24. ATS-6.

Direct-to-Schoolhouse Satellite Relay of Video Programs, pg 22

[Authors:] Douglas [Doug] J. Mellor, Richard [Rick] D. Pering, James [Jim] A. Hall, Arthur [Art] Fong, pg 24

September 1974 v.26 n.1

Cover: Model 8082A Pulse Generator

A 250-MHz Pulse Generator with Transition Times Variable to less than 1 ns. Generating pulses at a 250-MHz repetition rate while giving the operator full control over the shape of these pulses requires microcircuit techniques, by Gert Globas, Eldon Cornish, Joel Zellmer, pg 2-7. 8082A.

[Authors:] Eldon Cornish, Joel Zellmer, Gert Globas, pg 7

Optimizing the Design of a High-Performance Oscilloscope. A wideband oscilloscope is more useful if its performance is not subject to variations that may degrade measurement accuracy. Its value is even more apparent if this consistent performance is achieved at moderate cost, both initial and long-term, by S. Raymond Kushnir, Thomas J. Zamborelli, P. Kent Hardage, pg 8-15. 1720A.

[Authors:] P. Kent Hardage, Thomas [Tom] J. Zamborelli, S. Raymond [Ray] Kushnir, pg 14

A Thin-Film/Semiconductor Thermocouple for Microwave Power Measurements. This device is what makes it possible for the 435A/8481A Power Meter to outperform thin-film and thermistor power meters, by Weldon H. Jackson, pg 16-18

[Author:] Weldon H. Jackson, pg 18

Microelectronics Enhances Thermocouple Power Measurements. Day-to-day microwave power measurement accuracy is substantially improved by this new thermocouple power meter system, without sacrificing the convenience of earlier thermistor instruments, by John Lamy, pg 19-24. 435A/8481A.

[Author:] John C. Lamy, pg 23

October 1974  v.26 n.2

Cover: The HP 21MX Series

A User-Oriented Family of Minicomputers. HP’s minicomputer section manager discusses the philosophy behind the design of this new computer series, by John M. Stedman, pg 2-6. 21MX.

The Value of User Microprogrammability, pg 4

[Author:] John M. Stedman, pg 6

Microprogrammable Central Processor Adapts Easily to Special User Needs. The 21MX processor maintains program and I/O compatibility with its HP predecessors, but has a new micro-instruction format that makes it easier to extend the instruction set, by Philip Gordon, Jacob R. Jacobs, pg 7-14

Testing the 21 MX Processor, by Richard L. Hammons, Cleaborn C. Riggins, pg 10-11

[Authors:] Philip [Phil] Gordon, Jacob [Jake] R. Jacobs, Clearborn  [Cle] C. Riggins, Richard [Rich] L. Hammons, pg 14

All Semiconductor Memory Selected for New Minicomputer Series. Considerations of cost, reliability, power, density and speed all pointed to the 4K RAM as the best choice, by Robert J. Frankenberg, pg 15-20. 21MX.

The Million-Word Minicomputer Main Memory, by John S. Elward, pg 19-20

[Authors:] Robert [Bob] J. Frankenberg, John [Jack] S. Elward, pg 20

A Computer Power System for Severe Operating Conditions. The power supply system of 21MX Series Computers differs in many respects from the power supplies of other minicomputers. It is less vulnerable to poor ac line conditions than the supplies of most minicomputers of similar size and cost, by Richard C. Van Brunt, pg 21-24

[Author:] Richard [Dick] C. Van Brunt, pg 24

November 1974 v.26 n.3

Cover: A 9700A Distributed System Central Station collects data from two satellite automatic test systems dedicated to measurement tasks

Distributed Computer Systems. As multiple minicomputers collect data, control processes, and run tests, a central computer system supports them all, gathering data, generating management reports, and performing other tasks at the same time, by Shane Dickey, pg 2-11. 9700, 91700A, 91703A, 91704A, 91705A.

A Working Distributed System, pg 4-5

Satellites for Specific Applications, pg 8

RTE File Management Package, pg 10

[Author:] Shane Dickey, pg 11

A Quality Course in Digital Electronics. This practical approach to the teaching of digital integrated circuit principles includes hardware, a textbook and a 26-experiment laboratory workbook, by James A. Marrocco, Barry Bronson, pg 12-14. 5035T.

[Authors:] Barry Bronson, James [Jim] A. Marrocco, pg 14

Simplified Data-Transmission Channel Measurements. Synthesized signal generation and a dual time-interval measurement simplify evaluation of group delay and attenuation distortion in voice-grade telephone lines used for transmitting digital data, by David H. Guest, pg 15-24. 3770A.

Measurement of Amplitude and Delay Distortion, pg 17

A Group Delay Standard, pg 20

December 1974 v.26 n.4

Cover: The LED numeric display on this oscilloscope is an essential part of a new way of measuring very short time intervals

Improved Accuracy and Convenience in Oscilloscope Timing and Voltage Measurements. Timing measurements are made more easily and accurately with the dual-delayed sweep of a new oscilloscope. An internal microprocessor gives direct readout of time or voltage, greatly simplifying measurement procedures, by William B. Risley, Walter A. Fischer, pg 2-11. 1722A.

[Authors:] William [Bill] B. Risley, Walter [Walt] A. Fischer, pg 11

Laboratory Notebook: An Active Loop-Holding Device, by David H. Guest, pg 11

A Supersystem for BASIC Timesharing. This HP 3000 Computer System is optimized for BASIC language timesharing, but it also supports concurrent batch processing in BASIC, FORTRAN, COBOL, and SPL, by Nealon Mack, Leonard E. Shar, pg 12-17

[Authors:] Nealon [Neal] Mack, Leonard [Len] E. Shar, pg 17

Deriving and Reporting Chromatograph Data with a Microprocessor-controlled Integrator. Printing retention times next to the peaks while plotting the chromatogram, a new integrator measures the chromatograph peak areas and, at the end of the run, derives concentrations and prints the analysis on the chromatogram, by Andrew Stefanski, pg 18-24. 3380A.

A Printing Plotter, pg 20

Adapting a Calculator Microprocessor to Instrumentation, by Hal Barraclough, pg 22

[Authors:] Andrew [Andy] Stefanski, Hal Barraclough, pg 23

January 1975 v.26 n.5

Cover: HP Product Manager, Jane Evans, with the HP Interface Bus

The Hewlett-Packard Interface Bus: Current Perspectives. First announced over two years ago, the Hewlett-Packard Interface Bus has undergone refinements that make it suitable as a model for a proposed international standard, by Donald C. Loughry, pg 2-4

The HP Interface Bus, pg 3

HP Interface Bus Specification Summary, pg 4

Putting Together Instrumentation Systems at Minimum Cost. Instrumentation systems that do useful work can be assembled around the HP Interface Bus at costs in the $15k to $25k range. Here is an approach to assembling such systems with a minimum amount of engineering time, by David W. Ricci, Peter S. Stone, pg 5-11

Recreatable automatic Systems for the Lab, pg 6

Developing a One-of-a-Kind Automatic Test System, pg 9

Packaged Calculator-Based Measurement Systems, pg 11

Filling in the Gaps–Modular Accessories for Instrument Systems. These programmable modules provide such accessory functions as remote display, switching, digital-to-analog conversion, and measurement pacing and timing. They are useful both with single instruments and as components of automated systems, by Charles R. Trimble, Steven E. Schultz, pg 12-18. 59301A, 59303A, 59304A, 59306A, 59307A, 59308A, 59309A, 59300 Series, 5312A, 5150A.

A Quiet, HP-IB-Compatible Printer that Listens to both ASCII and BCD, by Hans-Jurg Nadig, pg 14-15

A Multifunction Scanner for Calculator-Based Data Acquisition Systems, by David L. Wolpert, pg 17

Instruments for Use in HP Interface Bus Connected Systems, pg 17

Minimal Cost Measuring Instruments for Systems Use, by Lawrence P. Johnson, Gary D. Sasaki, pg 18

Visualizing Interface Bus Activity. Connecting to the HP Interface Bus, a new analyzer listens to and displays the status of all bus lines for easy study of bus activity. It also serves as a talker, using programs in its internal memory to exercise bus-compatible instruments and systems, by Harold E. Dietrich, pg 19-23. 59401A.

[Authors:] Donald [Don] C. Loughry, David [Dave] W. Ricci, Peter [Pete] S. Stone, Steven [Steve] E. Schultz, Charles [Charlie] R. Trimble, Hans-Jurg [Hans] Nadig, pg 23

[Authors:] Harold [Harry] E. Dietrich, David [Dave] L. Wolpert, Gary D. Sasaki, Lawrence [Larry] P. Johnson, pg 24

February 1975 v.26 n.6

Cover: Two-bridge measurement that’s easy for the 7047A X-Y Recorder

High-Sensitivity X-Y Recorder Has Few Input Restrictions. To match its high sensitivity, this new recorder provides 130 dB of common-mode rejection for virtually any input configuration. No external “guard” connection is needed unless the common-mode voltage exceeds ten volts peak, by Daniel E. Johnson, John M. Wade, Donald W. Huff, pg 2-9. 7047A X-Y.

Appendix I: Analytical Expressions for common-Mode Rejection Ratio and Noise Pump-Out Current, pg 8

Appendix II: Effects of Amplifier Offsets, pg 9

[Authors:] John M. Wade, Donald [Don] W. Huff, Daniel [Dan] E. Johnson, pg 9

Digital High-Capacitance Measurements to One Farad. Here’s a new high-C meter capable of measuring today’s wide-value electrolytic and tantalum capacitors. It’s for production testing, incoming inspection and the laboratory, by Kunihisa Osada, Jun-ichi Suehiro, pg 10-16. 4828A.

[Authors:] Kunihisa Osada, Jun-ichi Suehiro, pg 15

Computer Performance Improvement by Measurement and Microprogramming. The speed of a computer-based Fourier analyzer was increased by a factor of ten by creating several new machine language instructions using firmware. Areas to be microprogrammed were selected on the basis of performance measurements, by David C. Snyder, pg 17-24. Microcode.

[Author:] David [Dave] C. Snyder, pg 24

March 1975 v.26 n.7

Cover: New Model 86290A 2-to-18 GHz RF Plug-in installed in an 8620A Sweep Oscillator mainframe

A High-Performance 2-to-18-GHz Sweeper. This precise, compact microwave sweep oscillator is a significant contribution to its field. The latest microelectronic and YIG technology makes it possible, by Carl J. Enlow, Paul R. Hernday, pg 2-14. 86290A.

A 2-18-GHz YIG-Tuned Multiplier, by Robert Joly, pg 6

A 2.0-6.2-GHz YIG-Tuned Oscillator, by Roger Stancliff, Paul Hernday, pg 8

A 2.0-6.2-GHz Power Amplifier, by Ganesh Basawapatna, pg 11

Product Design of the 86290A, by Willaim Misson, Billy Knorpp, pg 12

How YIG Tuning Works, pg 13. Yttrium-Iron-Garnet.

Broadband Swept Network Measurements. Vector and scalar measurements can be made from 2 to 18 GHz in one sweep by pairing the new 2-18-GHz sweep oscillator with other microwave instruments, by John J. Dupre, Cyril J. Yansouni, pg 15-17. 8620A/86290A.

[Authors:] John [Jack] J. Dupre, Paul R. Hernday, Carl J. Enlow, Cyril J. Yansouni, pg 17

The Dual Function Generator: A Source of a Wide Variety of Test Signals. FM signals, AM signals, dc levels, tone bursts, pulses and ramps, in addition to sine, square and triangular waves, are produced by this new dual-source function generator, by Dan D. Danielson, Ronald J. Riedel, pg 18-24. 3312A.

Variable Symmetry with Constant Frequency, pg 20

[Authors:] Dan D. Danielson, Ronald J. Riedel, pg 24

April 1975 v.26 n.7

Cover: Model 5305A, a new low-cost compact, portable 1100-MHz frequency counter

A Portable 1100-MHz Frequency Counter. This new addition to the 5300 Measuring System is well suited for checking out land mobile communications and aeronautical navigation equipment, by Hans J. Jekat, pg 2-8. 5305A.

An Eight-Digit Mainframe for the 5300 Measuring System, by P. Thomas Mingle, pg 6

[Author:] Hans J. Jekat, pg 7

A New 5-GHz Transistor Process, pg 8

Big Timer/Counter Capability in a Portable Package. This 75-MHz, eight-function universal timer/counter is another snap-on module for the low-cost, compact 5300 Measuring System. Compatibility with battery pack, digital-to-analog converter, and HP interface bus modules provides extra versatility, by Kenneth J. MacLeod, pg 9-13. 5308A.

A Universal Autoranging System for a Universal Timer/Counter, pg 11

[Author:] Kenneth [Ken] J. MacLeod, pg 13

A High-Current Power Supply for Systems that use 5-volt IC Logic Extensively. This switching-regulated power supply gives 100A at 5 V with 70% efficiency. A heat-removal system allows compactness without loss of reliability, by Mauro DiFrancesco, pg 14-19. 62605M.

[Author:] Mauro DiFrancesco, pg 18

Band-Selectable Fourier Analysis. Frequency resolution in selected bands can be as much as 100 times better than conventional baseband Fourier analysis, by H. Webber McKinney, pg 20-24

[Author:] H. Webber [Webb] McKinney, pg 24

May 1975 v.26 n.9

Cover: Model 3551A Telephone Test Set

An Understandable Test Set for Making Basic Measurements on Telephone Lines. This new portable test set uses a digital processor to present direct-reading, autoranged measurements of level and frequency, substantially reducing operator errors. Other conveniences simplify set-up and operation, by Michael B. Aken, David K. Deaver, pg 2-9. 3551A, 3552A.

A Function Generator with a Well-Defined Output, pg 6

[Authors:] David [Dave] K. Deaver, Michael [Mike] Aken, pg 9

A Computer System for Analog Measurements on Voiceband Data Channels. Besides making nine data-channel performance tests automatically in less than two minutes, this new Transmission Parameter Analyzer is capable of a much broader range of measurements, by Roger F. Rauskolb, Stephen G. Cline, Robert H. Perdriau, pg 10-17. 5453A.

Portable Transponder Allows Two-Way Data Channel Measurements, pg 16

Hewlett-Packard Instruments for Checking Voice-Grade Telephone Lines, pg 17

[Authors:] Roger F. Rauskolb, Robert [Bob] H. Perdriau, Stephan [Steve] G. Cline, pg 17

A Precision Spectrum Analyzer for the 10-Hz-to-13-MHz Range. Adaptable to automatic systems or bench use, a new spectrum analyzer has measurement resolution of 0.01 dB, pass-bands as narrow as 3 Hz, and a dynamic range of 70 db, by Jerry W. Daniels, Robert L. Atchley, pg 18-24. 3571A.

Attenuating the Classical Attenuator Problem, pg 22

[Authors:] Robert [Bob] L. Atchley, Jerry W. Daniels, pg 24

June 1975 v.26 n.10

Cover: Model 2640A Interactive display terminal using its optional line-drawing character set to display a form to be filled in by the operator

Cost-effective, Reliable CRT Terminal is First of a Family. Microprocessor control and modular design result in a computer terminal that is powerful and flexible, yet low in cost. Jim Doub, engineering section manager, discusses the family concept and the philosophy behind the design, by James A. Doub, pg 2-5. 2640A.

The HP 2640A At Work as a Data Entry Terminal, by Terry Eastham, pg 4

[Author:] James [Jim] A. Doub, pg 5

A Functionally Modular Logic System for a CRT Terminal, by Arthur B. Lane, pg 6-10. 2640A.

Data Communications, pg 9

[Author:] Arthur [Art] B. Lane, pg 10

A High-Resolution Raster Scan Display, by Jean-Claude Roy, pg 11-15. 2640A.

2640A Sweep System, by George Crow, pg 14

2640A Power Supply, by George Crow, pg 15

[Author:] Jean-Claude [Jean] Roy, pg 15

Firmware for a Microprocessor-controlled CRT Terminal, by Thomas F. Waitman, pg 16-19. 2640A.

Testing the HP 2640A, by Edward Tang, pg 19

[Author:] Thomas [Tom] F. Waitman, pg 19

A Microprocessor-Scanned Keyboard, by Otakar Blazek, pg 20-21. 2640A.

[Author:] Otakar [Oty] Blazek, pg 21

Packaging for Function, Manufacturability, and Service, by Robert B. Pierce, pg 22-24. 2640A.

Designing with Engineering Foam Plastics, by Jerome Keever, pg 23

[Author:] Robert [Bob] B. Pierce, pg 24

July 1975 v.26 n.11

Cover: Model 5328A Universal Counter and its optional input modules

Modularity Means Maximum Effectiveness in Medium-Cost Universal Counter. A single mainframe and a wide choice of optional timer, counter, and DVM modules provide better performance at lower cost, meet each user’s needs precisely, and leave room for future growth, by Bruce S. Corya, James F. Horner, pg 2-8. 5328A.

Mechanical Design of an Option-configurable Counter, pg 6

[Authors:] James [Jim] F. Horner, Bruce S. Corya, pg 7

Using a Modular Universal Counter. Here’s what the various features of the new Model 5328A Universal Counter can do for the user, by Alfred Langguth, William D. Jackson, pg 9-14

Three-State Trigger Lights, pg 10

HP-IB Option Fits Simple or Sophisticated Systems Applications, pg 13

[Authors:] William [Bill] D. Jackson, Alfred [Al] Langguth, pg 14

Synthesized Signal Generator Operation to 2.6 GHz with Wideband Phase Modulation. New plug-ins give the Model 8660-series Synthesized Signal Generators programmable operation to 2.6 GHz and a capability for phase modulation, by Young Dae Kim, James A. Hall, pg 15-20. 8660C, 86603A, 86634A.

Phase Modulation, pg 18-19

[Authors:] James [Jim] A. Hall, Young Dae Kim, pg 20

Applications of a Phase-Modulated Signal Generator. Once a capability is made available, applications emerge. Here are a few that have been found for the phase-modulated synthesized signal generator in HP’s own laboratories, by James A. Hall, pg 21-24

August 1975 v.26 n.12

Cover: Multichannel is the byword as new test instruments are developed in response to the accelerating rush to digital electronic

The Logic State Analyzer, a Viewing Port for the Data Domain. A new logic state analyzer has expanded capabilities that speed the location of the sources of problems in digital systems and broaden the range of problems that can be resolved with this class of instrument, by Charles T. Small, Justin S. Morrill, Jr., pg 2-10. 1600A, 1607A.

Inside the Model 1607A Logic State Analyzer, by Thomas Saponas, pg 9

[Authors:] Charles [Chuck] T. Small, Justin S. Morill, Jr., pg 10

Oscilloscope Triggering on Digital Events, pg 11

Unravelling Problems in the Design of Microprocessor-Based Systems. The debugging of a microprocessor-based system is expedited considerably by an instrument that provides an appropriate disclosure of what’s going on inside the system, by William E. Wagner, pg 12-16

[Author:] William [Bill] E. Wagner, pg 16

A Multichannel Word Generator for Testing Digital Components and Systems. This instrument supplies eight 32-bit serial words simultaneously at clock rates up to 50 MHz or, conversely, 32 8-bit parallel words. Versatile outputs adapt the generator to a wide range of tests involving digital components, assemblies and data buses, by Wolfgang Kappler, Arndt Pannach, pg 17-24. 8016A.

Word Generator Operation with the HP Interface Bus, pg 19

Problem Solutions with the Model 8016A Word Generator, by Jurgen Buesen, pg 21-22

[Authors:] Wolfgang Kappler, Arndt Pannach, pg 24

September 1975 v.27 n.1

Cover: Test procedures for Model 9510D can now be written in ATLAS, a high-level language that relieves the test procedure writer of the need for detailed knowledge of the test system

ATLAS: A Unit-Under-Test Oriented Language for Automatic Test Systems. A engineer can write test procedures in ATLAS without detailed knowledge of the system that will do the testing. HP’s new ATLAS compiler is the first comprehensive implementation of what is fast becoming a world-wide standard test language, by William R. Finch, Robert B. Grady, pg 2-13. 9500.

Minimizing Test Program Expenses, pg 8

HP ATLAS Language Words and Compiler Commands, pg 12

[Authors:] Robert [Bob] B. Grady, William [Bill] R. Finch, pg 13

Automatic 4.5-GHz Counter Provides 1-Hz Resolution. Its new frequency counter offers high performance for telecommunications and other applications at a modest cost. Systems compatibility and built-in diagnostics enhance its value, by Ali Bologlu, pg 14-18. 5341A.

[Author:] Ali Bologlu, pg 18

A New Instrument Enclosure with Greater Convenience, Better Accessibility, and High Attenuation of RF Interference. Evolutionary changes in the way electronic circuits are packaged have called for a new approach to enclosure design. Described here is the results of a corporate-wide effort to meet customers’ changing requirements, by Allen F. Inhelder, pg 19-24

[Author:] Allen [Al] E. Inhelder, pg 24

October 1975 v.27 n.2

Cover: New Model 436A Digital Power Meter and the new Model 8484A Power Sensor

Digital Power Meter Offers Improved Accuracy, Hands-Off Operation, Systems Compatibility. Its four-digit general-purpose microwave power meter features autoranging, absolute or relative readings, 0.01 dB resolution, and 0.02 dB basic accuracy. Six power sensors cover a frequency range of 100 kHz to 18 GHz and a power range of –70 dBm to +35dBm, by Allen P. Edwards, pg 2-7. 436A.

Automatic Gain and Attenuation Measurements, pg 5

[Author:] Allen P. Edwards, pg 7

Very-Low-Level Microwave Power Measurements. A new low-barrier Schottky diode power sensor makes it possible to measure power as low as 100 picowatts over a frequency range of 10 MHz to 18 GHz, by Ronald E. Pratt, pg 8-10. 8484A.

[Author:] Ronald [Ron] E. Pratt, pg 10

Active Probes Improve Precision of Time Interval Measurements. Usable with most time interval counters, this new probe system helps solve problems caused by trigger point indeterminacy, system delay errors, inadequate dynamic range, and circuit loading, by Robert W. Offermann, Steven E. Schultz, Charles R. Trimble, pg 11-16. 5363A.

See Also: Correction: To the accuracy noted in the article “Active Probes Improve Precision of Time Interval Measurements”, page 11 in the November 1975 issue

[Authors:] Steven [Steve] E. Schultz, Robert [Bob] W. Offermann, Charles [Charlie] R. Trimble, pg 16

Flow Control in High-Pressure Liquid Chromatography. Operation at high pressures introduces many problems in the control of fluid flow when two solvents must be mixed in a precise ratio. Hydraulic capacitors provide the key to precision solvent mixing, by Helge Schrenker, pg 17-24. 1010B.

[Author:] Helge Schrenker, pg 24

November 1975 v.27 n.3

Cover: The HP-21 Scientific, the HP-22 Business and Financial, and the HP-25 Programmable Scientific

Three New Pocket Calculators: Smaller, Less Costly, More Powerful. HP’s second-generation pocket calculator family now includes a basic scientific model, a programmable scientific model, and a business model, by Randall B. Neff, Lynn Tillman, pg 2-7. HP-21, HP-22, HP-25.

An Example of HP-25 Programming, pg 6

[Authors:] Randall [Randy] B. Neff, Lynn Tillman, pg 7

Inside the New Pocket Calculators. The HP-21 type of calculator isn’t just a stripped-down version of older HP pocket calculators, but an entirely new design, by Richard E. Whicker, Michael J. Cook, George M. Fichter, pg 8-12

Packaging the New Pocket Calculators, by Thomas A. Hender, pg 10

[Authors:] Richard [Rich] E. Whicker, Michael [Mike] J. Cook, pg 11

Correction: To the accuracy noted in the article “Active Probes Improve Precision of Time Interval Measurements”, page 11 in the October 1975 issue, pg 11

[Authors:] Thomas [Tom] A. Hender, George M. Fichter, pg 12

A New Microwave Link Analyzer for Communications Systems Carrying Up to 2700 Telephone Channels. Multiplexed communications systems can operate at full capacity only when distortions are at a low level. This new instrument helps optimize the performance of wide-bandwidth systems, by Ian Matthews, Svend Christensen, pg 13-24. 3790A, 3792A.

The Detection of AM-to-PM Conversion by Means of High-Frequency Test Signals, by Ian Matthews, pg 18 –20

[Authors:] Ian Matthews, Svend Christensen, pg 24

December 1975 v.27 n.4

Cover: An oscilloscope displays wave-forms in the traditional manner but it can also be adapted to display 1’s and 0’s in a data format

A 100-MHz Analog Oscilloscope for Digital Measurements. A new general-purpose oscilloscope has features such as dual-channel magnification and third-channel trigger display that enhance its versatility, particularly with respect to measurements in digital systems, by Allan I. Best, pg 2-7. 1740A.

Working in the Data Domain – Logic State Analyzers and Oscilloscopes, by Charles H. House, pg 5

A “Visible” Mechanical Design, by John W. Campbell, pg 6

[Author:] Allan [Al] I. Best, pg 7

An Oscilloscope Vertical-Channel Amplifier that Combines Monolithic, Thick-Film Hybrid, and Discrete Technologies. To minimize maintenance and calibration times by minimizing the number of parts and the number of adjustments, a high degree of integration was incorporated in the vertical amplifier system of the Model 1740A Oscilloscope, by Joe K. Millard, pg 8-11

Designing a High-Density Thick-Film Hybrid Integrated Circuit, by Richard D. Tabbutt, pg 9

[Author:] Joe K. Millard, pg 11

A Real-Time Operating System with Multi-Terminal and Batch/Spool Capabilities. RTE-II, an advanced version of HP’s real-time executive system for 2100 Series Computers, has several new features that aid both real-time measurement and control and concurrent background activities such as program development, by George A. Anzinger, Adele M. Gadol, pg 12-20. 92001A, Real-Time Executive System II.

Introduction to Real-Time Operating Systems, by Van Diehl, Kenneth A. Fox, pg 15

[Authors:] Adele M. Gadol, George A. Anzinger, pg 20

Real-Time Executive System Manages Large Memories. RTE-III does everything other HP real-time executive systems do and adds large-memory management (up to 256K words) using HP’s dynamic mapping system, by Linda W. Averett, pg 21-24. 92060A, Real-Time Executive System III.

[Author:] Linda W. Averett, pg 24

January 1976 v.27 n.5

Cover: Microprocessor Control

An Automatic Selective Level Measuring Set for Multichannel Communications Systems. Combining microprocessor control with meticulous receiver and synthesizer design results in a powerful new tool for the installation, maintenance, and surveillance of frequency-division multiplexed communications systems, by J. Reid Urquhart, pg 2-7. 3745A, 3745B.

Operating a Selective Level Measuring Set through a Keyboard, pg 4

[Author:] J. Reid Urquhart, pg 7

Designing Precision into a Selective Level Measuring Set, by Hugh P. Walker, pg 8-12

Spurious Responses That Can Perturb a Measurement, pg 12

[Author:] Hugh P. Walker, pg 12

Designing a Quiet Frequency Synthesizer for a Selective Level Measuring Set, by John H. Coster, pg 13-15

[Author:] John H. Coster, pg 15

Making the Most of Microprocessor Control, by David G. Dack, pg 16-18

[Author:] David G. Dack, pg 18

Real-Time Multi-User BASIC. Easy-to-learn, interactive BASIC is now available as a programming language for HP computer systems operating under the real-time executive operating systems, RTE-II and RTE-III, by James T. Schultz, pg 19-24

[Author:] James [Jim] T. Schultz, pg 24

February 1976 v.27 n.6

Cover: A sculptural representation of the 5501A Laser Transducer System for machine-tool positioning

Laser Transducer Systems for High-Accuracy Machine Positioning. These reliable, modular systems consist of an HP two-frequency laser head and interferometric optics designed for permanent installation on a machine tool or measuring machine, and a selection of interface electronics to couple the laser to a computer, calculator or numerical controller, by Andre F. Rude, Michael J. Ward, pg 2-6. 5501A.

Appendix: Some Things to Keep in Mind When Configuring a Laser System, pg 6

Electronics for the Laser Transducer. The emphasis is on flexibility and completeness, making the system adaptable to virtually any combination of controller and machine, by William E. Olson, Robert B. Smith, pg 7-18. 5501A.

A Numeric Display Module, by Ronald C. Jensen, pg 10

System Example: Calculator/Laser Controlled Measuring Machine, pg 17

[Authors:] Andre F. Rude, Robert [Bob] B. Smith, William [Bill] E. Olson, Michael [Mike] J. Ward, pg 18

Using a Programmable Calculator as a Data Communications Terminal. A discussion of the data communications capabilities of the HP 9830A Calculator, with examples of real-life applications, by James E. Carlson, Ronald L. Stickle, pg 19-24

[Authors:] Ronald [Ron] L. Stickle, James [Jim] E. Carlson, pg 24

March 1976 v.27 n.7

Cover: The new rugged Model 5062C Cesium Beam Frequency Reference and the new 15-centimeter cesium beam tube that makes it possible

A Cesium Beam Frequency Reference for Severe Environments. Systems operating in demanding environments, including airborne, marine and land mobile, can now benefit from the accuracy and stability of the cesium atom as a time and frequency reference, by Charles E. Heger, Ronald C. Hyatt, Gary A. Seavey, pg 2-10. 5062C.

[Authors:] Charles [Chuck] E. Heger, Gary A. Seavey, Ronald [Ron] C. Hyatt, pg 10

Calibrated FM, Crystal Stability, and Counter Resolution for a Low-Cost Signal Generator. A new synchronizer/counter boosts the frequency stability and resolution of HP’s low-cost 520-MHz signal generator, which is now available in a new calibrated-FM version, Model 8654B, as well as the original Model 8654A, by Robert R. Collison, Ronald E. Kmetovicz, pg 11-17. 8655A.

[Authors:] Robert [Bob] R. Collison, Ronald [Ron] E. Kmetovicz, pg 17

A 50-Mbit/s Pattern Generator and Error Detector for Evaluating Digital Communications System Performance. To simplify measurements in PCM system, this new all-in-one instrument has fixed clock rates and a choice of interface levels. Besides measuring bit-error rate, it can also estimate coding errors and measuring clock-frequency offset, by Ivan R. Young, Robert Pearson, Peter M. Scott, pg 18-24. 3780A.

[Authors:] Ivan R. Young, Robert [Bob] Pearson, Peter M. Scott, pg 24

April 1976 v.27 n.8

Cover: Model 3810A Total Station gives the operator a direct readout of distance to a pole-mounted retroreflector held by his rod man

Electronic Total Station Speeds Survey Operations. This new electronic surveying instrument measures slope distance and zenith angle simultaneously, then computes and displays horizontal or vertical distance in feet or metres. Its base measures horizontal angle, by Michael L. Bullock, Richard E. Warren, pg 2-12. 3801A.

Angle Transducer, pg 10

[Authors:] Michael [Mike} L. Bullock, Richard [Rick] E. Warren, pg 12

Designing Efficiency into a Digital Processor for an Analytical Instrument. Hardware control of the I/O system eliminates excessive overhead in the architecture of a digital processor used in a gas chromatograph, leading to significant improvements in operating convenience, by John S. Poole, Len Bilen, pg 13-20. 5840A.

[Authors:] Len Bilen, John S. Poole, pg 20

May 1976 v.27 n.9

Cover: Model 2644A Terminal is a microprocessor-controlled CRT terminal that has two built-in magnetic tape units for mass data storage

New CRT Terminal Has Magnetic Tape Storage for Expanded Capability. Two built-in tape drives make the terminal a stand-alone data station. User benefits are reduced on-line time costs, lover line charges in remote operations, and greatly lessened demand on computer resources, by Robert G. Nordman, Richard L. Smith, Louis A. Witkin, pg 2-15. 2644A.

Mini Data Cartridge: A Convincing Alternative for Low-Cost, Removable Storage, by Alan J. Richards, pg 6-7

Mini-Cartridge Drive Mechanism, pg 12-13

[Authors:] Richard [Rich] L. Smith, Alan J. Richards, Louis [Lou] A. Witkin, Robert [Bob] G. Nordman, pg 14

Laboratory Notebook: A Logarithmic Counter, by David Arnold, pg 16-15 [sic]

June 1976 v.27 n.10

Cover: 9825A Calculator with its high-performance NMOS LSI processor and the powerful system-controller capabilities

Third Generation Programmable Calculator Has Computer-Like Capabilities. A new programming language, HPL, helps the user apply the many technological advances in this personal computing machine to a wide variety of computation and control problems, by Donald E. Morris, Chris J. Christopher, Geoffrey W. Chance, Dick B. Barney, pg 2-14. 9825A.

9825A Product Design, pg 5

9825A Cartridge Tape Unit, pg 13

[Authors:] Geoffrey [Geoff] W. Chance, Donald [Don] E. Morris, Dick B. Barney, Chris J. Christopher, pg 14

High-Performance NMOS LSI Processor, by William Eads, David S. Maitland, pg 15-18. 9825A.

Processor Tester. An Application of the 9825A Calculator, pg 18

[Authors:] David [Dave] S. Maitland, William [Bill] D. Eads, pg 18

Character Impact Printer Offers Maximum Printing Flexibility. This new printer is fast and reliable, and has features previously unavailable in a calculator peripheral, including programmable horizontal and vertical tabulation, variable character spacing, and plotting ability, by Robert B. Bump, Gary R. Paulson, pg 19-23. 9871A.

[Authors:] Robert [Bob] B. Bump, Gary R. Paulson, pg 23

Mid-Range Calculator Delivers More Power at Lower Cost. Its design takes advantage of the latest technology, principally a single-chip microprocessor, by Douglas Clifford, F. Timothy Hickenlooper, A. Craig Mortensen, pg 24-32. 9825A, 9815A.

[Author:] Douglas [Doug] M. Clifford, pg 30

[Authors:] A. Craig Mortensen, F. Timothy [Tim] Hickenlooper, pg 31

July 1976 v.27 n.11

Cover: Model 8505A Network Analyzer

A Direct-Reading Network Analyzer for the 500-kHz-to-1.3-GHz Frequency Range. Beside measurements of gain, loss, phase shift and reflection coefficient, this new all-in-one measuring set makes direct measurements of equivalent electrical length, group delay, and deviation from linear phase shift, by Hugo Vifian, pg 2-6. 8505A.

[Author:] Hugo Vifian, pg 6

Measuring A Linearly Changing Frequency, by Frederick Woodhull, pg 6

A Family of Test Sets for the 500 kHz-1.3 GHz Range, by Julius Botka, pg 7

Processing Wide-Range Network Analyzer Signals for Analog and Digital Display, by William S. Lawson, David D. Sharrit, pg 8-11

A Wide-Range, Continuously-Variable Line Stretcher, by William Lawson, pg 9

A Wide-Range, High-Resolution Group Delay Detector, by David Sharrit, pg 11

[Authors:] William [Bill] S. Lawson, David [Dave] D. Sharrit, pg 11

A Precision RF Source and Down-Converter for the Model 8505A Network Analyzer, by Rolf Dalichow, Daniel R. Harkins, pg 12-16

Well-Matched Down-Converters, by Wayne Frederick, pg 13

Generating Well-Isolated Tracking Source Signals, by Mark Roos, Phillip Chen, pg 15

[Authors:] Rolf Dalichow, Daniel [Dan] R. Harkins, pg 16

August 1976 v.27 n.12

Cover: Against a backdrop photo of an HP 3000 series II Computer System are a Series II Memory board and an example of an Error Correcting Memory Log Analysis

Series II General-Purpose Computer Systems: Designed for Improved Throughput and Reliability. A larger, faster memory system with error correction and error logging, a faster central processor, an expanded instruction set, and a more efficient operating system are the major technological advances. Benchmark studies rate the new HP 3000 Series II Computer System at two to four times the throughput of earlier versions, by Leonard E. Shar, pg 2-7. Model 5, Model 7, Model 9.

An All-Semiconductor Memory with Fault Detection, Correction, and Logging, by Elio A. Toschi, Tak Watanabe, pg 8-13. 3000 Series.

[Authors:] Leonard [Len] E. Shar, Tak Watanabe, Elio A. Toschi, pg 13

HP 3000 Series II Performance Measurement, by Clifford A. Jager, pg 14-16

[Author:] Clifford [Cliff] A. Jager, pg 16

September 1976 v.28. n.1

Cover: HP Model 1741A variable persistence/storage scope

An Easier-to-Use Variable-Persistence/Storage Oscilloscope with Brighter, Sharper Traces. Revising the control arrangement and operating modes of a variable persistence oscilloscope results in a more “friendly” instrument that also has improved display characteristics, by Van Harrison, pg 2-8. 1741A.

A Brighter, More Sharply Focused Variable Persistence/Storage Cathode-Ray Tube, by Robert Wickliff, Jr., pg 6

[Author:] Van Harrison, pg 8

An Automatic Wide-Range Digital LCR Meter. Easy operation, a wide measurement range, two measurement frequencies, high reliability, optional HP-IB compatibility, and low cost make it suitable for a wide range of component and impedance measurements, by Satoru Hashimoto, Toshio Tamamura, pg 9-16. 4261A.

See Also: Correction: To figure 4 in the article “An Automatic Wide-Range Digital LCR Meter”, page 9 in the October 1976 issue

[Authors:] Satoru Hashimoto, Toshio Tamamura, pg 15

October 1976 v.28 n.2

Cover: New Oximeter. 47201A.

Continuous, Non-Invasive Measurements of Arterial Blood Oxygen Levels. A new oximeter gives calibrated non-invasive measurements of the oxygen saturation of hemoglobin in arterial blood, using a multiwavelength optical technique that approaches “touch-and-read” convenience, by Edwin Merrick, Thomas Hayes, pg 2-9. 47201A.

See Also: Corrections: To an incomplete reference on page 9 in the article “Continuous, Non-Invasive Measurements of Arterial Blood Oxygen Levels, page 20 in the December 1976 issue. Also,  to an equation on page 5 in the same article, also on page 20 in the December 1976 issue.

Oximeter Theory, pg 5

[Authors:] Edwin [Ed] B. Merrick, Tom Hayes, pg 9

Correction: To figure 4 in the article “An Automatic Wide-Range Digital LCR Meter”, page 9 in the September 1976 issue, pg 9

Laboratory Notebook: A Signal-Level Reference, by J. Reid Urquhart, pg 10

Laboratory Notebook: An Accurate, Low-Noise Discriminator, by Gerald Ainsworth, Richard Pope, pg 10

Card-Programmable Digital IC Tester Simplifies Incoming Inspection. It’s inexpensive, easy to set up to test a wide variety of digital IC’s and easy to operate. Interfaces for many automatic IC handlers are available, by Eric M. Ingman, pg 11-18. 5045A.

[Author:] Eric M. Ingman, pg 18

Some Economic Considerations of IC Testing, by Mark Baker, pg 18-19

November 1976 v.28 n.3

Cover: The HP-97 and the HP-67 are fully programmable portable calculators that can run each other’s programs

A Pair of Program-Compatible Personal Programmable Calculators. One is a small, portable printing calculator and the other is a hand-held version without a printer. Both versions feature a “smart” magnetic card reader, and each can run the other’s programs, by Peter D. Dickinson, William E. Egbert, pg 2-8. HP-97, HP-67.

[Authors:] Peter D. Dickinson, William [Bill] E. Egbert, pg 8

Portable Scientific Calculator Has Built-In Printer. It’s the first of a new generation of small, portable, printing calculators that operate on rechargeable batteries or line current, by Bernard E. Musch, Robert B. Taggart, pg 9-16. HP-91.

See Also: Corrections: To a typographical error in the equation on page 10 in the article “Portable Scientific Calculator Has Built-In Printer”,  in the December 1976 issue, pg 20

Printing on the HP-97, by William E. Egbert, pg 10

The New Accuracy: Making 2³ = 8*, by Dennis W. Harms, pg 16-17

[Author:] Dennis W. Harms, pg 17

[Authors:] Bernard [Bernie] E. Musch, Robert [Bob] B. Taggart, pg 18

High-Power Solid-State 5.9-12.4-GHz Sweepers. Two new RF plug-ins for the 8620C Sweep Oscillator produce more than 50

mW of output power, thanks to a new gallium arsenide field-effect transistor, by Louis J. Kuhlman, Jr., pg 19-22

A 5.9-12.4-GHz GaAs FET Power Amplifier, pg 20

The GaAs FET in Microwave Instrumentation, by Patrick H. Wang, pg 22-23

New Low-Noise GaAs FET Chip has 25-Milliwatt Output at 10 GHz, pg 23

[Authors:] Patrick [Pat] H. Wang, Louis [Jack] J. Kuhlman, Jr., pg 24

December 1976 v.28 n.4

Cover: Model 547A Current Tracer reveals the presence and relative size of current steps by the brightness of its built-in lamp while Model 546A Logic Pulser supplies the needed stimulus current if it isn’t already present in the system under test

Current Tracer: A New Way to Find Low-Impedance Logic-Circuit Faults. By tracing current pulses, this sensitive probe helps locate solder bridges, shorted conductors in cables, shorts in voltage distribution networks, shorted IC inputs and dead or stuck outputs, stuck wired-AND circuits, and stuck data buses, by John Beckwith, pg 2-8. 547A.

[Author:] John F. Beckwith, pg 8

New Logic Probe Troubleshoots Many Logic Families. The probe’s single lamp indicator displays high or low logic levels, bad levels, and open circuits on digital circuit nodes. Testable logic families include TTL, DTL, CMOS, HTL, HNIL and MOS, by Robert Quenelle, pg 9-11. 545A.

A Smart Probe-Test System, by Barry Bronson, pg 10

[Author:] Robert [Bob] C. Quenelle, pg 11

A Multifunction, Multifamily Logic Pulser. This microprogrammed pulse generator in a probe can produce single pulses, pulse bursts, or pulse streams. Its output state automatically adjusts for the type of logic being simulated, by Barry Bronson, Anthony Chan, pg 12-15. 546A.

[Authors:] Anthony [Tony] Y. Chan, Barry Bronson, pg 15

Probe Family Packaging, by David E. Gordon, pg 16-17

[Author:] David [Dave] E. Gordon, pg 17

Multifamily Logic Clip Shows All Pin States Simultaneously. This new logic clip works with virtually all logic families from ECL to 18V CMOS. Loading of the circuit under test is minimal. The clip is protected by overloads to 30V, by Durward Priebe, pg 18-20. 548A.

[Author:]  Durward Priebe, pg 20

Corrections:

To a typographical error in the equation on page 10 in the article “Portable Scientific Calculator Has Built-In Printer”,  in the November 1976 issue, pg 20

Also,  to an incomplete reference on page 9 in the article “Continuous, Non-Invasive Measurements of Arterial Blood Oxygen Levels in the October 1976 issue. Also,  to an equation on page 5 in the same article, pg 20

Interfacing a Parallel-Mode Logic State Analyzer to Serial Data. A new serial-to-parallel converter enables a parallel-mode logic state analyzer to work with serial data so the analyzer’s tabular display and versatile triggering can be used for tracing data flow in serial data systems, by Justin S. Morrill, Jr., pg 21-24. 10254A.

[Author:] Justin S. Morrill, Jr., pg 24

January 1977 v.28 n.5

Cover: A fetal monitor and a logic state analyzer for digital electronics

A Logic State Analyzer for Microprocessor Systems. A new logic state analyzer for debugging systems that use popular microprocessors has broadly expanded triggering capabilities plus keyboard control and mnemonic display that help solve problems more efficiently, by Jeffrey H. Smith, pg 2-11. 1611A.

[Author:] Jeffrey [Jeff] H. Smith, pg 11

Firmware for a Microprocessor Analyzer. By replacing hardware with firmware, the instrument designer can increase operator convenience and present data in a more meaningful form without increasing circuit complexity. Here is how this capability was applied to a logic state analyzer, by Thomas A. Saponas, pg 12-15. 1611A.

[Author:] Thomas [Tom] A. Saponas, pg 15

A Versatile, Semiautomatic Fetal Monitor for Non-Technical Users. A new monitoring instrument detects the heart beat of an unborn child by any one of four techniques. It does not required technically trained people to operate it, so the benefits of fetal monitoring now become available to a wider range of hospitals, by Heinz Sommer, Walter Ruchay, Peter Salfeld, Erich Courtin, pg 16-24. 8030A.

Fetal Monitoring – Towards Improved Management of Pregnancy and Delivery, pg 17

A Peak Pulse Detector, by Heinz Sommer, pg 19

An Elemental Cardiotocograph, pg 23

[Authors:] Erich Courtin, Heinz Sommer, Peter Salfeld, Walter Ruchay, pg 23

February 1977 v.28 n.6

Cover: Voltmeters

A Fast-Reading, High-Resolution Voltmeter that Calibrates Itself Automatically. Although it has 1-mV resolution and integrating capability – useful for high-accuracy measurements on the lab bench – this new voltmeter makes 24 readings/second working on the HP interface bus – a boon for systems users. Real-time autocalibration and the ability to perform calculations on its own readings contribute to its versatility, by Albert Gookin, pg 2-10. 3455A.

A Low-Cost, Programmable Data Logger, pg 4

A Faster Integrating Analog-to-Digital Converter, pg 9

[Author:] Albert [Al] Gookin, pg 10

A High-Speed System Voltmeter for Time-Related Measurements. Waveform characteristics as well as dc levels can be determined by this fast sample-and-hold voltmeter when teamed with a calculator or computer. Optimized for systems use, it has a programmable trigger delay that gives it unusual capabilities, by John E. McDermid, Joseph M. Gorin, James B. Vyduna, pg 11-19. 3437A.

A Programmable Data Acquisition System that also Analyzes, pg 14

[Authors:] John E. McDermid, James [Jim] B. Vyduna, Joseph [Joe] M. Gorin, pg 19

Contemporary Design Practice in General-Purpose Digital Multimeters. With lower cost and smaller size, digital multimeters are now found in a very broad range of applications. New approaches to design are required to meet the demands posed by this universality, by Roy D. Barker, Virgil L. Laing, Joe E. Marriott, H. Mac Juneau, pg 20-28. 3476A/B, 3435A.

An Economical 3 ½ -Digit Multimeter, pg 21. 3476A.

A Precision 3 ½ Digit Multimeter, pg 23. 3435A.

Extending the Ranges of a Digital Multimeter, pg 25

1-mV Resolution in a Low-Cost 4 ½ Digit Multimeter, pg 26. 3465A/B.

[Authors:] Roy D. Barker, Virgil L. Laing, pg 26

[Authors:] Joe E. Marriott, H. Mac Juneau, pg 27

March 1977 v.28 n.7

Cover: New HP 1000 Computer System

A New Series of Small Computer Systems. HP 1000 Systems are designed for high-performance applications in computation, instrumentation and operations management, by Lee Johnson, pg 2-6. Model 30/31, Model 80/81.

HP 1000 Computer System Applications, pg 5

[Author:] Lee Johnson, pg 6

HP 1000 Operating System is Enhanced Real-Time Executive. New RTE-II and RTE-III software provides for on-line system generation and switching, disc cartridge backup, disc and mini-cartridge distribution of software, new system string communication, and improved I/O error management, by Kathleen F. Hahn, David L. Snow, pg 7-14. 92001B, 92060B.

[Authors:] Kathleen [Kathy] F. Hahn, David [Dave] L. Snow, pg 14

Development and Application of Microprograms in a Real-Time Environment, by Harris Dean Drake, pg 15-17. 92061A.

[Author:] Harris [Dean] Dean Drake, pg 17

E-Series Doubles 21MX Performance. Faster logic, improvements to the architecture and firmware, and new microprogrammed features greatly increase performance without significantly increasing cost, by Cleaborn C. Riggins, pg 18-19. 21MX.

[Author:] Cleaborn C. Riggins, pg 19

How the E-Series Performance Was Attained, by Scott J. Stallard, pg 20-23. 21MX.

[Author:] Scott J. Stallard, pg 23

Microprogrammed Features of the 21MX E-Series, by Thomas A. Lane, pg 24-27

[Author:] Thomas [Tom] A. Lane, pg 27

OPNODE: Interactive Linear Circuit Design and Optimization. OPNODE is a powerful software package for computer-aided circuit design with an interactive graphics console in a minicomputer environment, by William A. Rytand, pg 28-31

[Author:] William [Bill] A. Rytland, pg 31

Viewpoints: John Moll on HP’s Integrated Circuit Technology, pg 32 (continued on page 17)

April 1977 v.28 n.8

Cover: HP’s new silicon-on-sapphire micro-CPU chip, MC²

Silicon-On-Sapphire Technology Produces High-Speed Single-Chip Processor. This new integrated-circuit processor is a static CMOS/SOS 16-bit parallel device. Its architecture is optimized for controller applications. Instruction execution times are 0.5 to 1.5 microseconds at an 8-MHz clock rate, by Bert E. Forbes, pg 2-8. MC².

CMOS/SOS, by David Farrington, pg 5

[Authors:] Bert E. Forbes, David Farrington, pg 8

Miniature Oscilloscope Probes for Measurements in Crowded Circuits. Resistive-divider probes only 2.4 mm (0.1) inch in diameter can access test points in densely populated circuits without shorting to adjacent leads. Grounding options preserve fast rise times, by Carolyn M. Finch, Marvin F. Estes, Lawrence A. Gammill, pg 9-12. 10017A, 10018A, 10040A, 10041A, 10042A, 10021A, 10022A, 10026A, 10027A.

[Authors:] Marvin [Marv] F. Estes, Lawrence [Larry] A. Gammill, Carolyn M. Finch, pg 12

A Small, Solid-State Alphanumeric Display. Serial loading and on-board storage of data on this dot-matrix display reduces the cost and complexity of supporting circuitry substantially. The 5 x 7 array of LEDs gives full alphanumeric capability (upper and lower case letters, numerals, special symbols), by Peter B. Ashkin, Jack L. Hines, John T. Uebbing, pg 13-20. HDSP-2000.

Generating Characters on a Dot-Matrix Display, pg 16-17

A Highly Tolerant Shift-Register Flip-Flop, pg 19

[Authors:] John J. Uebbing, Peter B. Ashkin, Jack L. Hines, pg 20

May 1977 v.28 n.9

Cover: 5004A Signature Analyzer, a troubleshooting tool for field repair of digital systems

Signature Analysis: A New Digital Field Service Method. In a digital instrument designed for troubleshooting by signature analysis, this method can find the components responsible for well over 99% of all failures, even intermittent ones, without removing circuit boards from the instrument, by Robert A. Frohwerk, pg 2-8. 5004A.

[Author:] Robert [Bob] A. Frohwerk, pg 8

Easy-to-Use Signature Analyzer Accurately Troubleshoots Complex Logic Circuits. It’s a new tool for field troubleshooting of logic circuits to the component level, by Anthony Y. Chan, pg 9-14. 5004A.

[Author:] Anthony [Tony] Y. Chan, pg 14

Signature Analysis – Concepts, Examples, and Guidelines. Guidelines for the designer are developed based on experience in attempting to retrofit existing products for signature analysis and the successful application of signature analysis in a new voltmeter, by Hans J. Nadig, pg 15-21

Designer Guidelines for Applying Signature Analysis to Microprocessor-Based Products, pg 18

[Author:] Hans J. Nadig, pg 21

Personal Calculator Algorithms I: Square Roots. A detailed description of the algorithm used in HP hand-held calculators to computer square roots, by William E. Egbert, pg 22-24

[Author:] William [Bill] E. Egbert, pg 24

June 1977 v.28 n.10

Cover: Technical developments described in this issue occupy widely spaced positions in the frequency spectrum (symbolized here by the visible spectrum) – at the low, low end, a dc power supply and power supply programmer, and at the high end, coaxial microwave accessories. But most of these devices share one common characteristic: they can be equipped to work on the HP interface bus.

A Wide-Ranging Power Supply of Compact Dimensions. Its output ranging from 0 to 50 volts and 0 to 10 amperes, this 200W, series-regulated, laboratory power supply spans a range that would normally require three power supplies and it can be programmed by way of the HP interface bus, by William T. Walker, John W. Hyde, Paul W. Bailey, pg 2-9. 6002A.

Remote Programming of Power Supplies Through the HP Interface Bus, by Kent Luehman, Emery Salesky, pg 6-7

[Author:] Paul W. Bailey, pg 8

[Authors:] John W. Hyde, Emery Salesky, Kent Lushman, William [Bill] T. Walker, pg 9

Coaxial Components and Accessories for Broadband Operation to 26.5 GHz. The new APC-3.5 coaxial connector makes it possible to design detectors, attenuators, sliding loads, and switches for broadband operation to 26.5 GHz, by Ronald E. Pratt, Donald R. Chambers, George R. Kirkpatrick, pg 10-16. 8473C, 33330C, 8495D/K, 33321D/K, 911C, 33311C.

[Authors:] George [Bob] R. Kirkpatrick, Ronald [Ron] E. Pratt, Donald [Don] R. Chambers, pg 15

Personal Calculator Algorithms II: Trigonometric Functions. A detailed explanation of the algorithms used by HP hand-held calculators to compute sine, cosine, and tangent, by William E. Egbert, pg 17-20

[Author:] William [Bill] Egbert, pg 20

July 1977 v.28 n.11

Cover: Model 2641 APL Display Station

Small Computer System Supports Large-Scale Multi-User APL. Powerful, interactive APL is now available for the multi-lingual HP 3000 Series II Computer System, by Kenneth A. Van Bree, pg 2-5. A Programming Language. APL\3000, 32105A, 2641A.

[Author:] Kenneth [Ken] A. Van Bree, pg 4

Introduction to APL, pg 4-5

APL Data: Virtual Workspaces and Shared Storage, by Grant J. Munsey, pg 6-10

See Also: Corrections: Figures 2 & 3 on pages 9-10 in “APL Data: Virtual Workspaces and Shared Storage”, are interchanged; a clarification of functions on pages 14 and 19 in the same article, page 22 in the August 1977 issue

[Author:] Grant J. Munsey, pg 10

APLGOL: Structured Programming Facilities for APL, by Ronald L. Johnston, pg 11-13

[Author:] Ronald [Ron] L. Johnston, pg 13

APL/3000 Summary, pg 14-16

A Dynamic Incremental Compiler for an Interpretive Language, by Eric J. Van Dyke, pg 17-23. APL.

A Controller for the Dynamic Compiler, by Kenneth A. Van Bree, pg 21

[Author:] Eric J. Van Dyke, pg 23

Extended Control Functions for Interactive Debugging, by Kenneth A. Van Bree, pg 23-24

CRT Terminal Provides both APL and ASCII Operation, by Warren W. Leong, pg 25-28. 2641A.

[Author:] Warren W. Leong, pg 28.

August 1977 v.28 n.12

Cover: Model 7920A Disc Drive which consists of two protect discs and three data discs and holds 50 megabytes of data

New 50-Megabyte Disc Drive: High Performance and Reliability from High-Technology Design. Achieving its high performance and large storage capacity required sophisticated design methods and tested the known limits of some manufacturing processes, by Herbert P. Stickel, pg 2-15. 7920A.

Head Alignment Disc Pack, by James Hood, pg 9

A Mechanical Vibrations Analogy for Servo System Design, by Joel Harrison, Lynn Weber, pg 13-14

[Author:] Herbert [Herb] P. Stickel, pg 15

An Individualized Pulse/Word Generator System for Subnanosecond Testing. A high-speed pulse/word generator is constructed in modular form so it can be configured according to specific testing requirements, by Volker Eberle, Christian Hentschel, Gunter Riebesell, Joel Zellmer, pg 16-24. 8080A, 8092A, 8084A.

[Authors:] Volker Eberle, Christian Hentschel, pg 22

Corrections: Figures 2 & 3 on pages 9-10 in “APL Data: Virtual Workspaces and Shared Storage”,  page 6 in the July 1977 issue, are interchanged; a clarification of functions on pages 14 and 19 in the same article, pg 22

[Authors:] Gunter Riebesell, Joel Zellman, pg 23

September 1977 v.29 n.1

Cover: Model 8772A X-Y Plotter

A New Family of Intelligent Multi-Color X-Y Plotters. These fast, precise, programmable plotters draw report quality four-color plots. Features include dashed-line fonts, several built-in character fonts, user-defined characters, and symbol plotting, by Lawrence G. Brunetti, pg 2-5. 9872A, 7221A.

[Author:] Lawrence [Larry] G. Brunetti, pg 5

Easy-to-Use Interface Language Controls HP-IB Plotter, by Thomas H. Daniels, Larry W. Hennessee, pg 5-9. 9872A.

[Author:] Larry W. Hennessee, Thomas [Tom] H. Daniels, pg 9

Remote Terminal Plotter Offers Simple Programming and Efficient Communications, by Marvin L. Patterson, David A. Bones, pg 9-13. 9872A, 7221A.

Programmable I/O Assures System Compatibility, by David A. Bones, pg 12

[Authors:] Marvin [Marv] L. Patterson, David [Dave] A. Bones, pg 13

Speed, Precision, and Smoothness Characterize Four-color Plotter Pen Drive System, by Richard M. Kemplin, Robert D. Haselby, Marvin L. Patterson, pg 13-18

[Authors:] Robert [Bob] d. Haselby, Richard [Dick] M. Kemplin, pg 18

Appendix: Correction of Non-Ideal Step Motor Behavior, by Marvin Patterson, pg 19

Pen and Ink System Helps Assure Four-color Plotter Line Quality, by Richard M. Kemplin, Larry W. Hennessee, Leonard P. Balazer, George W. Lynch, pg 20-25

Digitizing Sight Adds Versatility, by Leonard Balazer, pg 22

[Authors:] George W. Lynch, Leonard P. Balazer, pg 25

A Battery-Powered ECG Monitor for Emergency and Operating Room Environments. Electrical isolation, reduced susceptibility to RF and electrosurgery interference, and battery power equip this non-fade ECG monitor to operate in the electrically hostile environments found in emergency vehicles and operating rooms, by Ronald D. Gatzke, Sherry R. Grobstein, pg 26-32. 78333A.

Safety Problems in Battery-Powered Instruments, pg 27

Electrosurgery Interference, by Sherry R. Grobstein, pg 28

[Author:] Sherry R. Grobstein, pg 31

[Author:] Ronald [Ron] D. Gatzke, pg 32

October 1977 v.29 n.2

Cover: Model 5420A Digital Signal Analyzer

Advanced Digital Signal Analyzer Probes Low-Frequency Signals with Ease and Precision. Significant new features include absolute internal calibration in the user’s choice of engineering units, digital band selectable or ‘zoom’ analysis, fully annotated dual-trace CRT display with X and Y axis cursors, digital storage of data and measurement setups on a tape cartridge and a random noise source to provide test stimulus, by H. Webber McKinney, Richard H. Grote, pg 2-8. 5420A.

The Module I/O Bus (MIOB), by David C. Synder, pg 6

[Authors:] Richard [Dick] H. Grote, H. Webber [Webb] McKinney, pg 8

Front End Design for Digital Signal Analysis, by Jean-Pierre Patkay, Frank R.F. Chu, Hans A. M. Wiggers, pg 9-14. 5420A.

[Authors:] Hans Am M. Wiggers, Jean-Pierre [Pierre] D. Patkay, Frank Rui-Feng Chu, pg 13

Display and Storage Systems for a Digital Signal Analyzer, by Walter M. Edgerley, Jr., David C. Snyder, pg 14-17. 5420A.

Included between pages 14 & 15: Index to Volumes 25, 26, 27, 28. September 1973 through August 1977. PART 1: Chronological Index. PART 2: Subject Index. PART 3: Model Number Index. PART 4: Author Index. The index is 12 pages; no page numbers are given to the index itself.

[Authors:] Walter [Walt] M. Edgerley, Jr., David [Dave] C. Snyder, pg 16

Digital Signal Analyzer Applications. Analyses of two actual systems, one electrical and one mechanical, show what the analyzer can do, by Terry L. Donahue, Joseph P. Oliverio, pg 17-21. 5420A.

[Authors:] Joseph [Joe] P. Oliverio, Terry L. Donahue, pg 21

Printing Financial Calculator Sets New Standards for Accuracy and Capability. This briefcase-portable calculator has several new functions and is exceptionally easy to use. Most important, the user need not be concerned about questions of accuracy or operating limits, by Roy E. Martin, pg 22-28. HP-92.

[Author:] Roy E. Martin, pg 28.

November 1977 v.29 n.3

Cover: Model 8672A Synthesized Signal Generator

Expanding Synthesized Signal Generation to the Microwave Range. Here are two broadband, programmable, high-spectral-purity microwave signal sources, a 2-to-18 GHz synthesized signal generator and a 2-6.2 GHz synthesizer. Both are single compact,13-cm high instruments, by James L. Thomason, pg 2-7. 8671A, 8672A.

Applications of a Microwave Synthesized Signal Generator, pg 4

A Fast 2-18 GHz Pulse Modulator, by Ronald Larson, pg 6. 11720A.

[Author:] James [Jim] L. Thomason, pg 7

Frequency Synthesis in a Microwave Signal Generator, by Kenneth L. Astrof, pg 8-15

An Improved 2-to-6.2-GHz YIG-Tuned Oscillator, by G. Basawapatna, J. Nidecker, pg 12

Dealing with Microphonic Sidebands, by Carl Enlow, pg 14-15

[Author:] Kenneth [Ken] L. Astrof, pg 15

Signal Generator Features for a Microwave Synthesizer, by Bradley C. Stribling, pg 15-21

A High-Performance Microwave Power Leveling Loop, by Stephen Sparks, pg 17-18

A Calibrated 50-Hz-to-10-MHz FM System, by Robert Dildine, Ronald Larson, pg 20-21

[Author:] Bradley [Brad] C. Stribling, pg 21

Personal Calculator Algorithms III: Inverse Trigonometric Functions. A detailed description of the algorithms used in Hewlett-Packard hand-held calculators to compute arc since, arc cosine, and arc tangent, by William E. Egbert, pg 22-23

Viewpoints: Tom Hornak on Fiber-Optic Communications, pg 24-25 (continued on back page)

An NMOS Process for High-Performance LSI Circuits. Fast 16-bit microprocessors, 16K read-only memories, and a variety of special-purpose random-logic chips are the result of an NMOS process that produces high-performance large-scale integrated circuits, by Joseph E. Deweese, Thomas R. Ligon, pg 26-32

Applications of the NMOS-II Process, pg 30-31

[Authors:] Joseph [Joe] E. DeWeese, Thomas [Tom] R. Ligon, pg 31

[Author:] Tom Hornak, pg 32

December 1977 v.29 n.4

Cover: The multifaceted HP-01 Wrist Instrument

Wrist Instrument Opens New Dimension in Personal Information. It’s a digital electronic wristwatch, a personal calculator, an alarm clock, a stopwatch, a timer, and a 200-year calendar, and its functions can interact to produce previously unavailable results, by Andre F. Marion, Edward A. Heinsen, Robert Chin, Bennie E. Helmso, pg 2-10. HP-01.

[Authors:] Edward [Ed] A. Heinsen, Bennie [Ben] E. Helmso, Andre F. Marion, Robert [Bob] Chin, pg 10

Higher Precision in Oscilloscope Measurements of Very Short Time Intervals. Incorporating electronic counter circuits in a delta-time oscilloscope enables 100-ps resolution in measurements of clock phasing, propagation delay and other digital system timing parameters, by Ronald C. Westlund, pg 11-17. 1743A.

On Delta-Time Measurements, pg 16

[Author:] Ronald [Ron] C. Westlund, pg 17

A Wide-Ranging, Automatic LCR Meter for Stand-Alone or Systems Applications. Microprocessor control broadens the capabilities of this speedy LCR meter and makes it readily adaptable to BCD or HP-IB automatic systems, by Masahiro Yokokawa, Keiki Kanafuji, pg 18-24. 4262A.

[Authors:] Masahiro Yokokawa, Keiki Kanafuji, pg 24

January 1978 v.29 n.5

Cover: Model 2648A Graphics Terminal that has both graphics and alphanumeric capabilities

Versatile Low-Cost Graphics Terminal is Designed for Ease of Use. HP’s newest computer CRT terminal combines sophisticated graphics and alphanumeric capabilities with easy-to-use, system independent, automatic plotting, by Peter D. Dickinson, pg 2-6. 2648A.

[Author:] Peter D. Dickinson, pg 5

Raster Scan Graphics with Zoom and Pan, by Otakar Blazek, Michael B. Raynham, pg 6-12

Designing with 16K RAMs, pb 9

[Authors:] Michael [Mike] B. Raynham, Otakar [Oty] Blazek, pg 12

Firmware Control of a Microprocessor-Based Graphics Terminal, by John J. Moyer, pg 12-16. 2648A.

Graphics Self Test, pg 13

[Author:] John J. Moyer, pg 16

Add-On Digital Signal Processing Enhances the Performance of Network and Spectrum Analyzers. Digitizing and storing the outputs of network and spectrum analyzers enables flicker-free display of slowly swept measurements, corrections for system errors, and direct comparisons of device performance. Additions to the basic storage circuits achieve improved signal-to-noise ratios and increased resolution, by Jacob H. Egbert, Mark D. Roos, John T. Barr, Roger P. Oblad, pg 17-24. 8750A, 8501A.

Signal Averaging Enhances Network Analyzer Performance, pg 20

[Authors:] Jacob [Jake] H. Egbert, Roger P. Oblad, John T. Barr, pg 23

[Author:] Mark D. Roos, pg 24

February 1978 v.29 n.6

Cover: HP Model 1615A Logic Analyzer

A Logic State Analyzer for Evaluating Complex State Flow. Sequential triggering and selective trace are two of the capabilities that enable this 32-bit logic state analyzer to capture only the states of interest in complex program flow. It also counts states, and times their executive to help evaluate program performance, by George A. Haag, pg 2-10. 1610A.

[Author:] George A. Haag, pg 10

Viewpoints: Chuck House on the Ongoing Revolution in Digital Testing, pg 11-13

[Author:] Chuck House, pg 13

Interactive Logic State and Timing Analyses for Tracking Down Problems in Digital Systems. A new instrument combines 16-bit logic state analysis with 8-bit logic timing analysis to speed the location of problems involving asynchronous as well as synchronous events, by William D. Martin, John A. Scharrer, Robert G. Wickliff, Jr., pg 14-20. 1615A.

[Authors:] William [Bill] D. Martin, Robert [Bob] G. Wickliff, Jr., John A. Scharrer, pg 20

Entry Level Logic State Analyzer Has High-level Capability. Operable by a first-time user without any prior instruction, this compact, portable logic-state analyzer is also capable of sophisticated analyses of data flow. Moreover, it’s programmable, making possible low-cost, automatic systems for functional testing, by Charles T. Small, Alan J. DeVilbiss, pg 21-27. 1602A.

Untangling the Probing Problem, pg 22

[Authors:] Charles [Chuck] T. Small, Alan [Al] J. DeVilbiss, pg 27

Adapting the 1611A Logic State Analyzer to Work with the F8 Microprocessor Family. Microprocessors are not all alike. Adapting a dedicated instrument to test several different kinds of microprocessors poses some interesting challenges but also provides opportunities to broaden capability, by Deborah J. Ogden, pg 28-32. 1611A.

[Author:] Deborah [Debbie] J. Ogden, pg 31

March 1978 v.29 n.7

Cover: Our artist’s representation of a distributed computer system network made up of HP 3000 Series II, HP 1000, and HP 2026 Computer Systems

The Hewlett-Packard Distributed System Network. HP-DSN is a set of distributed systems products and a set of design objectives that provide a framework for interconnecting HP computer systems to form a network, by Andre O. Schwager, pg 2-6

[Author:] Andre O. Schwager, pg 5

Distributed Systems/3000. DS/3000 makes it possible for the user of an HP 3000 Computer System to communicate with remote HP 3000, HP 1000, and HP 2026 Computer Systems, by Philip M. Sakakihara, pg 7-14

[Author:] Philip [Phil] M. Sakakihara, pg 14

Distributed Systems/1000. DS/1000 makes it possible to interconnect HP 1000 Computer Systems in virtually any configuration to integrate instrumentation, computation, and operations management tasks, and to link these systems with HP 3000 Series II Systems for distributed data processing, by Robert R. Shatzer, pg 15-20

[Author:] Robert [Bob] R. Shatzer, pg 20

Data Entry and Communications Systems Have Network Capabilities. HP 2026 Systems are designed for high-performance data entry, local file inquiry and data communications with each other and the HP 3000, by David S. Kaplan, John R. Nielsen, pg 21-26

[Authors:] David S. Kaplan, John Richard [Rich] Nielsen, pg 25

Experimenting with Satellite-Linked Computer Networks. Project Prelude is an advanced computer communications experiment involving several companies, a satellite, and HP 3000 Series II Computer Systems, by Rita W. Williams, pg 27-32

[Author:] Rita W. Williams, pg 32

April 1978 v.29 n.8

Cover: Model 9845A Desktop Computer, also called, System 45

A Highly Integrated Desktop Computer System. System 45, the new flagship of the HP 9800 Series, gives the user unprecedented power in a single compact unit. It offers advanced capabilities in program documentation, string and matrix operations, subprograms, program linking, tracing, formatted output, mass storage and graphics, by Jack M. Walden, William D. Eads, pg 2-11

[Authors:] William [Bill] D. Eads, Jack M. Walden, pg 11

System 45 Hardware Design, by Louis T. Schulte, John C. Keith, Ansel K. Vogen, pg 11-21

System 45 Product Design, by Ray J. Cozzens, pg 14-15

System 45 Tape Control System, by Richard Kochis, pg 20

System 45 Power Supply, by Dick B. Barney, pg 21

[Authors:] Louis [Lou] T. Schulte, John C. Keith, Ansel [Andy] K. Vogen, pg 21

Advanced Thermal Page Printer Has High-Resolution Graphics Capability. This optional System 45 built-in peripheral quietly outputs program listings or hard copies of anything on the CRT display, by Ray J. Cozzens, pg 22-28. 9845A.

New Printhead Technology Developed for System 45, by Eugene R. Zeller, pg 25-26

[Authors:] Eugene [Gene] R. Zeller, Ray J. Cozzens, pg 28

Personal Calculator Algorithms IV: Logarithmic Functions. A detailed description of the algorithms used in HP’s hand-held calculators to computer logarithms, by William E. Egbert, pg 29-32

[Author:] William [Bill] E. Egbert, pg 32

May 1978 v.29 n.9

Cover: Model 5342A Microwave Frequency Counter

Microprocessor-Controlled Harmonic Heterodyne Microwave Counter Also Measures Amplitudes. The new harmonic heterodyne frequency measuring technique provides wide FM tolerance, high sensitivity and automatic amplitude discrimination. Simultaneous measurement of input amplitude is optional, by Ali Bologlu, Vernon A. Barber, pg 2-16. 5342A.

Down-Conversion Techniques for Microwave Frequency Measurements, pg 5

Signature Analysis in the 5342A, by Martin Neil, pg 8-9

A Technique that is Insensitive to FM for Determining Harmonic Number and Sideband, by Luiz Peregrino, pg 13-14

[Author:] Luiz Peregrino, pg 14

[Authors:] Ali Bologlu, Vernon [Al] A. Barber, pg 16

Generating High-Speed CRT Displays from Digital Data. A new graphics translator converts information received from a digital system by way of the HP interface bus into the analog signals needed for tracing vectors and characters on high-resolution CRT displays, by Kunio Hasebe, Arnot L. Ellsworth, pg 17-23. 1350A.

[Authors:] Kunio Hasebe, Arnot [Arnie] L. Ellsworth, pg 23

Laboratory Notebook: Swept-Frequency Measurements of High Levels of Attenuation at Microwave Frequencies, by Robert Jacobsen, pg 24

June 1978 v.29 n.10

Cover: Spectrum Analyzer

The Next Generation RF Spectrum Analyzer. Unprecedented tuning accuracy, frequency stability, and resolution – combined with a new level of control provided by three digital processors – raise to significantly new levels the art and science of spectrum analysis in the 100-Hz-to 1500-MHz range, by M. Dee Humpherys, Steven N. Holdaway, pg 2-8. 8568A.

A Precision, Digitally-Controlled Spectrum Analyzer for the 20-Hz-to-40-MHz Frequency Range, by Robert Temple, pg 6-7. 3585A.

[Author:] Robert [Bob] E. Temple, pg 6

[Authors:] Steven [Steve] N. Holdaway, M. Dee Humpherys, pg 7

Signal Processing in the Model 8568A Spectrum Analyzer, by Siegfried H. Linkwitz, Steven N. Holdaway, Michael J. Neering, David H. Molinari, pg 9-16

The Display System in the Model 8568A Spectrum Analyzer, by Michael J. Neering, Larry O. Bower, pg 11-12

[Author:] Larry O. Bower, pg 12

[Authors:] Siegfried Linkwitz, Michael [Mike] J. Neering, David [Dave] H. Molinari, pg 15

Developing the Digital Control System for the Model 8568A Spectrum Analyzer, by Lynn W. Wheelwright, Michael S. Marzalek, pg 16-20

Control of Model 8568A Spectrum Analyzer Through the HP Interface Bus, by Rex Bullinger, pg 18

[Author:] Rex A. Bullinger, pg 18

[Authors:] Michael [Mike] S. Marzalek, Lynn M. Wheelwright, pg 20

Designing Serviceability into the Model 8568A Spectrum Analyzer, by David D. Sharrit, pg 20-24

Computer-Based Production-Line Testing of the Model 8568A Spectrum Analyzer, by John Faick, pg 22-23

[Author:] John C. Faick, pg 23

[Author:] David [Dave] D. Sharrit, pg 24

July 1978 v.29 n.11

Cover: Model 2240A Measurement and Control Processor is designed to interface a computer to real-world sensors and controls

An Intelligent Peripheral for Measurement and Control. Communicating with the computer in a high-level language, this new computer front end independently executes analog and digital measurement and control tasks. It has a full complement of input/output interfaces and many built-in service facilities, by Ray H. Brubaker, Jr., pg 2-9. 2240A.

First HP Product to Use Silicon-on-Sapphire Technology, pg 5. 2240A.

Measurement and Control Processor Monitors HP Facility, by Robert B. Grady, pg 7-8

[Author:] Robert [Bob] B. Grady, pg 8

[Author:] Ray H. Brubaker, Jr., pg 9

Firmware Intelligence for Measurement and Control Processing. The HP 2240A demonstrates how HP-IB communications are maturing as instruments gain in sophistication, by Donald E. Klaiss, pg 10-18. 2240A.

Analog Input Card Calibration, by Vincent J. Dauciunas, pg 13

PHI, the HP-IB Interface Chip, by John W. Figueroa, pg 16-17

[Author:] John W. Figueroa, pg 17

[Authors:] Vincent [Vince] J. Dauciunas, Donald [Don] E. Klaiss, pg 18

An Easy-to-Use Data Capture Terminal for Industrial Operations. Designed for collecting data at remote points within a manufacturing operation, this compact terminal is operated easily by those unfamiliar with computer operations. It can also serve as a link between a computer and distant HP-IB-controlled instruments, by Daniel C. Berthier, Michel E. Bernard, Jacques A. Ripert, pg 19-24. 3070B.

A Multifunction Reader, pg 21

[Author:] Michel E. Bernard, pg 23

[Authors:] Jacques A. Ripert, Daniel C. Berthier, pg 24

August 1978 v.29 n.12

Cover: Model 5359A Time Synthesizer and Model 5370A Universal Time Interval Counter

Universal Counter Resolves Picoseconds in Time Interval Measurements. A new triggered phase-locked oscillator and a dual vernier interpolation scheme provide 20-picosecond resolution without averaging. Microprocessor architecture adds flexibility and processing power, by David C. Chu, Mark S. Allen, Allen S. Foster, pg 2-11. 5370A.

The Triggered Phase-Locked Oscillator, by David C. Chu, pg 8-9

See Also: Corrections: The last line on page 8 in the article “The Triggered Phase-Locked Oscillator” was omitted; the last line on page 4 in the article “Universal Counter Resolves Picoseconds in Time Interval Measurements” in the same issue is incorrect; text on page 16 in “Time Synthesizer Generates Precise Pulse Widths and Time Delays for Critical Timing Applications”, page 12 in the same issue, is incorrect, page 5 in the September 1978 issue

[Author:] David C. Chu, pg 10

[Authors:] Mark S. Allen, Allen S. Foster, pg 11

Time Synthesizer Generates Precise Pulse Widths and Time Delays for Critical Timing Applications. This time synthesizer’s extremely stable, low-jitter time delays may be synchronized precisely to an external trigger. Automatic calibration and HP-1B compatibility are standard features, by Leonard R. Dickstein, Keith M. Ferguson, pg 12-19. 5359A. See Also the Corrections section above.

Instrument Commonality, Reliability and Serviceability, by Leonard Dickstein, pg 19

[Authors:] Leonard R. Dickstein, Keith M. Ferguson, pg 19

Remotely-Controlled RF Switch for Multipoint Tests in Communication Systems. Under manual or HP-IB control, this RF switch provides access to any one of 10 inputs carrying signals in a range of 10 kHz to 25 MHz or, when cascaded with other switches, to any one of up to 1000 inputs, by Kevin J. Bradford, pg 20-22. 3754A, 3755A.

[Author:] Kevin J. Bradford, pg 22

Laboratory Notebook: A High-Level-Language Microprocessor Prototyping and Debugging System Using a Desktop Computer, by Allen Foster, Luiz Peregrino, pg 23-24

September 1978 v.29 n.13

Cover: Model 3582A Spectrum Analyzer

A High-Resolution, Low-Frequency Spectrum Analyzer. This dual-channel instrument uses digital computation with a microprocessor to make frequency-domain measurements in the 0-to-25.5-kHz range with bandwidths as narrow as 20 mHz, and do it hundreds of times faster than conventional swept-frequency analyzers. At the same time, a number of other important capabilities are obtained, by John S. Farnbach, Nixon A. Pendergrass, pg 2-13. 3582A.

Corrections: The last line on page 8 in the article “The Triggered Phase-Locked Oscillator”, page 2 in the August 1978 issue was omitted; the last line on page 4 in the article “Universal Counter Resolves Picoseconds in Time Interval Measurements” in the same issue is incorrect; text on page 16 in “Time Synthesizer Generates Precise Pulse Widths and Time Delays for Critical Timing Applications”, page 12 in the same issue, is incorrect, pg 5

The Fast Fourier Transform and the Model 3582A, pg 8

Window Functions for Spectrum Analysis, by Roger G. Cox, pg 10-11

[Author:] Roger G. Cox, pg 11

[Authors:] Nixon [Nick] Pendergrass, John S. Farnbach, pg 13

Hewlett-Packard FFT Analyzers, pg 13-14

Designing Programmable Digital Filters for LSI Implementation, by Lynn A. Schmidt, pg 15-23

What is a Digital Filter? pg 17-18

[Author:] Lynn A. Schmidt, pg 23

Desktop Plotter/Printer Does Both Vector Graphic Plotting and Fast Text Printing. This HP-IB desktop hardcopy unit has a bidirectional paper drive for long-axis plots and unattended plotting. It offers user unit scaling, graph rotation, printer capabilities, seven dashed-line fonts, English and European character sets, and user-definable characters, by Rick A. Warp, Majid Azmoon, Jaime H. Bohorquez, pg 24-30. 7245A.

Plotter/Printer Interface Languages: HP-GL and ASCII, by Michael P. Trego, pg 26

[Authors:] Majid  [Maj] Azmoon, Jaime [Jim] H. Bohorquez, pg 31

[Authors:] Rick A. Warp, Michael [Mick] P. Prego, pg 32

October 1978 v.29 n.14

Cover: An HP 1000 Model 45 Computer System displays its multilingual, multi-programming computing activity

Higher-Performance HP 1000 Computer Systems. The higher performance comes from new technologies, including new processors, faster 16K RAM semiconductor memories, and a new operating system, by Rodney K. Juncker, pg 2-5. Model 45, Model 40.

[Author:] Rodney [Rod] K. Juncker, pg 4

RTE-IV: The Megaword-Array Operating System, by Eugene J. Wong, C. Michael Manley, pg 6-11. Real-Time Executive, 92067A.

[Author:] C. Michael [Mike] Manley, Eugene J. Wong, pg 11

F-Series Extends Computing Power of HP 1000 Computer Family, by Julia A. Cates, pg 12-17

F-Series Rounding Techniques, pg 16

[Author:] Julia [Julie] A. Cates, pg 17

Microcoded Scientific Instruction Set Enhances Speed and Accuracy of F-Series Computers, by Charles R. Geber, pg 18-22. 1000 F-Series.

[Author:] Charles [Chuck] R. Geber, pg 22

New Memory Systems for HP 1000 Computers, by Alan H. Christensen, David C. Salomaki, pg 23-27

Achieving Reliability in Semiconductor Memory Systems, pg 26

[Authors:] Alan H. Christensen, David [Dave] C. Salomaki, pg 27

Multipoint Terminals for HP 1000 Systems, by Mitchell B. Bain, Gary Johnson, Denton B. Anderson, pg 28-32

[Authors:] Denton B. Anderson, Mitchell [Mitch] B. Bain, pg 31

[Author:] Gary W. Johnson, pg 32

November 1978 v.29 n.15

Cover: Print mechanisms that have a mechanical simplicity conducive to higher print speeds

Printer and Printing Terminal Gain Versatility and Mechanical Simplicity with Microprocessor Control. A 180-character-per-second-dot-matrix printing mechanism achieves high throughput by skipping over blanks and printing in either direction under microprocessor control. Versatility is enhanced with variable horizontal pitch, a full 128-USASCII-character set, and flexible interfacing, by Todd M. Woodcock, pg 2-7. 2631A, 2635A.

[Author:] Todd M. Woodcock, pg 7

Managing Dot-Matrix Printing with a Microprocessor, by John J. Ignoffo, Jr., Michael J. Sproviero, Phillip R. Luque, Kenneth A. Wade, pg 8-19. 2631A, 2631G, 2635A, 2639A.

Mechanical Design of a Durable Dot-Matrix Printer, by Robert Cort, pg 9

An Impact Graphics Printer, pg 11-12

Interfacing to a 180-Character/Second Printer/Terminal, by Gerard Carlson, Michael Lee, Roy Foote, pg 15-16

[Authors:] Kenneth [Ken] B. Wade, Phillip [Phil] R. Luque, Michael [Mike] J. Sproviero, John J. Ignoffo, Jr., pg 19

Versatile 400-lpm Line Printer with a Friction-Free Mechanism that Assures Long Life. This medium-speed line printer writes dot-matrix alphanumerics and graphics with a mechanism that has no sliding parts or bearing to wear out. It’s also versatile, with a capability for printing with a variety of character sets, by F. Duncan Terry, pg 20-22. 2608A.

[Author:] F. Duncan Terry, pg 22

Optimizing the Performance of an Electromechanical Print Mechanism, by Wallace T. Thrash, Everett M. Baily, William A. McIlvanie, Douglas B. Winterrowd, pg 23-32. 2608A.

Acoustic Design of the Model 2608A Line Printer, by Lynn Hessing, pg 24

Precise Paper Movement, by Robert Deely, Lynn Hessing, pg 26

Interface I/O for a 400-lpm Printer, by Stanley G. Peery, pg 30

[Authors:] Everett M. Baily, Douglas [Doug] B. Winterrowd, Wallace [Wally] T. Thrash, William [Bill] A. McIlvanie, pg 32

December 1978 v. 29 n.16

Cover: Model 9874A Digitizer transmits coordinate data to an on-line computer

Easy-to-Use, High-Resolution Digitizer Increases Operator Efficiency. This advanced new microprocessor-controlled digitizer provides an accurate, speedy, and convenient method for entering position information from maps, slides, x-rays, photographs, and other media into a computer for analysis, by Frank P. Carau, pg 2-13. 9874A.

Cursor Technology, by Henry T. Hetzel, pg 4. 9874A.

Glass Platen Technology, by Lawrence E. Brown, pg 8. 9874A.

Accuracy Testing, pg 11. 9874A.

[Author:] Lawrence [Larry] E. Brown, pg 12

[Authors:] Henry T. Hetzel, Frank P. Carau, pg 13

Included after page 13 and before page 19: Index to Volume 29 September 1977 through December 1978. There are no page numbers on the index itself. PART 1: Chronological Index. PART 2: Subject Index. PART 3: Model Number Index. PART 4: Author Index..

1-mHz-to-50-MHz Signal Source Combines Synthesizer Accuracy, Multimode Operation, and Easy Programming. Offering features not previously available in a single instrument, this new programmable signal source provides many kinds of test stimuli for either automatic or bench test applications, by Peter Brunner, Tilman Schad, Dieter Kible, pg 19-27. 8165A.

[Authors:] Tilman Schad, Dieter Kible, Peter Brunner, pg 27

A Compact Logging Multimeter that Can Manipulate Data. By combining the attributes of a 4 ½ -digit multimeter, a thermometer, a 4-channel scanner, a printer, and a microprocessor, this versatile instrument can be a time-saver for the design engineer, by Marsh L. Faber, John E. Scruggs, David L. Wolpert, pg 28-32. 3467A.

[Authors:] David [Dave] L. Wolpert, John E. Scruggs, Marshall [Marsh] L. Faber, Jr., pg 31