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 1968 v.19 n.5

Cover: Wideband capabilities of the Model 675A Sweep Generator are dramatized in this “fisheye” lens photo.

Three and One-Half Decades in One Clean Sweep. New high-accuracy sweep generator covers 10 kHz to 32 MHz in one range with low residual FM, by Robert B. Bump, Myles A. Judd, pg 2-6. 675A.

[Authors:] Robert B. Bump, Myles A. Judd, pg 6

Advances in Spectrum Analysis. A new preselector, variable persistence with storage, better sensitivity, and flatter frequency response make spectrum analysis considerably easier and more powerful, by John J. Dupre, John R. Page, Jr., Richard C. Keiter, pg 7-16. 8441A, 852A, 8551A.

How a YIG Filter works, pg 9. Yttrium-Iron-Garnet.

[Authors:] John J. Dupre, John R. Page, Jr., Richard C. Keiter, pg 16

February 1968 v.19 n.6

Cover: Geometric distortion of new HP Television Picture Monitor is measured according to IEEE Standards

A Precision Solid-state Television Picture Monitor. Controlling broadcast picture quality and producing high-resolution distortion-free, closed-circuit-TV displays are jobs for a precision instrument, like this advanced new TV picture monitor, by John R. Hefele, pg 2-8. 6946A.

[Author:] John R. Hefele, pg 8

Measuring Spot Size and Interlace Factor, pg 4-5

Counting CW and Pulsed RF Frequencies to 18 GHz. A new frequency converter plug-in and a new transfer oscillator plug-in put frequencies as high as 18 GHz within the reach of electronic counters. Details of the new transfer oscillator and how to make CW, pulsed RF, and FM measurements with it are given in this article, by Glenn B. DeBella, pg 9-15. 5257A, 5256A.

[Author:] Glenn B. DeBella, pg 15

Frequency converter, Transfer Oscillator, or Both? pg 11

Atomic Second Adopted by International Conference, pg 16. General Conference on Weights and Measures.

See Also: Units Ambiguity Noted, by Chester H. Page, regarding a symbol used in the article “Atomic Second Adopted by International Conference”, page 20 in the August 1968 issue

March 1968 v.19 n.7

Cover: Gamma ray spectroscopy system displays counts vs. energy spectrum of isotope

Electronic Techniques in Gamma Ray Spectroscopy and Timing, by Tracy S. Storer, pg 2-10

[Author:] Tracy S. Storer, pg 10

A Multichannel Pulse-Height Analyzer with a Very Fast Analog-Digital Converter, by W. A. Ross, pg 11-15. 5400A.

[Author:] W. A. Ross, pg 14

Differential Linearity, pg 13

A Charge-Sensitive Preamplifier for Nuclear Work, by James K. Koch, pg 16-18. 5554A.

[Author:] James K. Koch, pg 18

A Nuclear-Type Linear Amplifier with Plug-In Pulse-Shaping Delay Lines, by Eric M. Ingman, pg 19-21. 5582A.

[Author:] Eric M. Ingman, pg 20

NIM Bin, pg 21. Nuclear Instrument Modules, 5580B.

A Single-Channel Analyzer with Fast Multiple-Pulse Resolution, by Robert G. Wagstrom, pg 22-24. 5583A.

[Author:] Robert G. Wagstrom, pg 23

April 1968 v. 19 n. 8

Cover: Dots representing sample values of human brain waves, displayed on the CRT of the new HP Model 5480A Signal Averager

What is Signal Averaging? Repetitive waveforms buried in noise can often be pulled out by a signal averager, an instrument that takes advantage of the redundant information provided by repetition, by Charles R. Trimble, pg 2-7

Calibrated Real-time Signal Averaging. The first two plug-ins for this new digital signal analyzer make it a versatile signal averager. Novel averaging algorithms provide a stable, calibrated display of the average at all times and even allow the averager to follow slowly changing signals, by Charles R. Trimble, J. Evan Deardorff, pg 8-13. 5480A.

Where Averaging Helps, pg 9

[Authors:] J. Evan Deardorff, Charles R. Trimble, pg 12

Off-line Analysis of Averaged Data. This new input/output coupler makes the new HP signal averager compatible with a computer and peripheral equipment, by Francis J. Yockey, pg 14-16. 5495A.

[Author:] Francis J. Yockey, pg 16

May 1968 v.19 n. 9

Cover: The new HP Model 181A Variable Persistence Oscilloscope displaying the responses of a 5 kHz bandpass filter when swept by the HP Model 3300A Function Generator and its new HP Model 3305A Sweep Plug-in.

Sweeping Four Decades at Low Frequencies. Using an interesting current and capacitor switching technique, a new precision sweep plug-in provides broadband logarithmic sweep for testing low-frequency devices, by William T. Cowan, pg 2-7. 3305, 3300A.

[Authors:] Will Cowan, pg 6

[Team Members:] Steve Venzke, Virgil Leenerts, pg 6

Applications of Low-frequency Sweepers, pg 8-9

Easier and Brighter Display of High-Frequency Signals. Variable persistence and storage added to a high-frequency oscilloscope increase measurement versatility, by Charles A. Donaldson, Charles A. Gustafson, pg 10-15. 181A.

[Authors:] Chuck [Charles A.] Donaldson, Chuck [Charles A.] Gustafson, pg 15.

Stanford Scientists Study Space Signals. Signal averager pulls pulsar signals out of noise for real time display on CRT, by Laurence D. Shergalis, pg 16

June 1968 v.19 n. 10

Cover: Oscilloscope photos demonstrate the transient-free switching of frequency and voltage ranges of the HP Model 745A AC Calibrator.

High-Accuracy AC Voltage Calibration. Many techniques are available to calibrate ac instruments, but the venerable thermal transfer method is still the best for…, by Fred L. Hanson, pg 2-8. 745A.

Effects of Distortion on Calibration, pg 6

[Author:] Fred L. Hanson, pg 8

Systems-Oriented Digital Power Sources. Designed specifically to be programmed by a computer, this new digital power supply is tailor-made for automatic test systems, by Brett M. Nordgren, pg 9-16. 6130A, 6933A.

Digital Voltage Sources at Work, pg 14-15

[Author:] Brett M. Nordgren, pg 15

July 1968 v.19 n.11

Cover: A mobile teleprinter terminal with a telephone acoustic coupler brings a computer into the lab area

A Practical Time-Shared Computer System. Using conversational BASIC, a new 16-terminal systems doesn’t try to do everything for everyone, but still satisfies nearly all the user’s needs, by Thomas C. Poulter, Jr., pg 2-7. 2000A.

What is Time Sharing? pg 3

HP 2000A BASIC Language, pg 6

IEC Renames Noise Contour, pg 7. International Electrotechnical Commission.

[Author:] Thomas C. Poulter, Jr., pg 7

A Rubidium-Vapor Frequency Standard for Systems Requiring Superior Frequency Stability, by Darwin H. Throne, pg 8-14. 5065A.

[Author:] Darwin H. Throne, pg 14

Comparing Frequency Standards, pg 15-16. 105A, 5065A, 5061A.

August 1968 v.19 v. 12

Cover: Model 8552A/8553L Spectrum Analyzer and Model 8601A Generator/Sweeper.

Fully Calibrated Frequency-Domain Measurements. With absolute amplitude calibration and unique ease of use, this 1 kHz-to-110 MHz spectrum analyzer may be the beginning of a new era in spectrum analysis, by Brian D. Unter, pg 2-7 8552A/8553L, 140A, 141S, 143A.

Analyzer/Tracking-Generator System Has Amplitude Range of 120 dB, pg 4-5

[Author:] Brian D. Unter, pg 7

Design of a Third-Generation RF Spectrum Analyzer. Making a spectrum analyzer that is precisely calibrated and as easy to use as an oscilloscope required a number of new circuit and system techniques, by Brian D. Unter, Paul G. Winninghoff, Irving H. Hawley, Jr., Thomas L. Grisell, pg 8-14

[Authors:] Thomas L. Grisell, Irving H. Hawley, Jr., Paul G. Winninghoff, pg 13

New Concepts in Signal Generation. An AM/FM signal generator and precision-sweeper in a single 21-pound package is possible thanks to thin-film microcircuits and AFC, by John R. Hearn, Douglas C. Spreng, pg 15-20. 8601A.

[Authors:] John R. Hearn, Douglas C. Spreng, pg 19

Units Ambiguity Noted, by Chester H. Page, regarding a symbol used in the article “Atomic Second Adopted by International Conference”, page 16 in the February 1968 issue, pg 20

September 1968 v.20 n.1

Cover: The HP Model 9100A Computing Calculator

Fifty years ago this Marchant calculator was touted as ‘The Last Word in Calculators.’, by Laurence D. Shergalis, pg 2

A New Electronic Calculator with Computerlike Capabilities, by Richard E. Monnier, pg 2-9. 9100A.

[Author:] Richard [Dick] E. Monnier, pg 9

Hardware Design of the Model 9100A Calculator, by Thomas E. Osborne, pg 10-13.

[Author:] Thomas E. Osborne, pg 13

Internal Programming of the 9100A Calculator, by David S. Cochran, pg 14-16

[Author:] David S. Cochran, pg 16

Computer-Testing the HP Model 9100A Calculator, by Charles W. Near, pg 17-19

[Author:] Charles W. Near, pg 19

How the Model 9100A was Developed, by Bernard M. Oliver, pg 20

October 1968 v.20 n.2

Cover: Spring-mounted stylus used on HP electric writing recorders

Graphic Recorder Writing Systems. Pen and ink has been the most widely used writing method, but a new low-voltage electric writing system has proven successful for many difficult applications, by Dale R. Davis, Charles K. Michener, pg 2-7. 7100 Series, 17500A, 17501A, 17502A, 17503A, 17504A, 680, 680M.

[Authors:] Dale R. Davis, Charles K. Michener, pg 6

Low Voltage Electric Writing Recorders, pg 7-8.

Recording True-rms Voltages over Wide Dynamic Ranges. With this new logarithmic converter, a graphic recorder can measure ac or dc signals over four decades of amplitude without range switching. An electronic attenuator and feedback are the secrets, by John M. Wade, pg 9-14. 7562A.

[Author:] John M. Wade, pg 14

Atomic Hydrogen Masers: An Introduction and Progress Report. Size and weight are being reduced, and demand is growing for the hydrogen maser’s high stability. A satellite-borne maser is being developed but still needed is more product-oriented development, by Robert F. C. Vessot, pg 15-20

[Author:] Robert F. C. Vessot, pg 19

November 1968 v.20 n.3

Cover: BASIC – The Language of Time Sharing

BASIC: The Language of Time Sharing. A computer language designed for the beginner and the once-in-a-while programmer, BASIC is powerful, yet easy to learn, by Gerald L. Peterson, pg 2-8

[Author:] Gerald L. Peterson, pg 8

BASIC at Hewlett-Packard. Previously available only on large time-sharing systems, BASIC has been adapted by Hewlett-Packard programmers for HP computers and instrumentation systems, by Richard M. Moley, pg 9-13

[Author:] Richard M. Moley, pg 13

How to Correct for Errors in High-Frequency Oscilloscope Measurements. Knowing the parameters of various input configuration, it is possible to plot curves to determine error with frequency, by Wayne A. Kohl, pg 14-17

[Author:] Wayne A. Kohl, pg 15

Extending Precision Oscilloscope Measurements into the High Frequencies, pg 17-18. 1802A.

Voltage Probe for High-Frequency Measurements, by Eddie A. Evel, pg 19-20

[Author:] Eddie A. Evel, pg 20

1969 UTC Offset Announced, pg 20. International Bureau of Time.

December 1968 v.20 n.4

Cover: Low distortion of the HP Model 204C Oscillator, measured by the HP Model 3590A Wave Analyzer, is displayed over a 90 dB range on an HP Model 7004A X-Y Recorder

Rapid Analysis of Low Frequency Spectra. Detection of signal amplitude and frequency is made easier with automatic amplitude ranging and electronic sweeping, by Larry A. Whatley, pg 2-7. 3590A, 3592A, 3594A.

[Authors:] Larry Whatley, Alfred Gort, pg 6

High Dynamic Performance X-Y Recorder. Pen acceleration has been made compatible with high slewing speed by use of a direct-coupled servo amplifier and a miniature high-torque dc motor, by Otto S. Talle, Jr., pg 8-11. 7004A.

[Author:] Otto S. Talle, Jr., pg 10

A Low-Cost, General-Purpose Oscillator with Low Distortion and High Stability, by Paul F. Febvre, James M. Colwell, pg 12-16. 204C.

Amplitude Stability with a Zener Level Detector, pg 14

[Authors:] James M. Colwell, Paul F. Febvre, pg 15

January 1967 v.18 n.5

Cover: Rapid, Direct Measurement of Complex Impedance in a Circuit

Methods of Measuring Impedance. A review of some important systems for measuring the impedance of devices and circuits, by Charles G. Gorss, pg 2-11

[Author:] Charles G. Gorss, pg 10

Some Basic Formulas Involving Q, pg 8

Comparison of Some Impedance Measuring Systems, pg 10

Direct-Reading, Fully-Automatic Vector Impedance Meters. Two new instruments designed to measure impedance magnitude and phase angle quickly and easily over a broad frequency range, by Gerald J. Alonzo, Hirsh V. Marantz, Richard H. Blackwell, pg 12-20. 4800A, 4815A.

Design Philosophy of Vector Impedance Meters, pg 15

[Authors:] Gerald J. Alonzo, Richard H. Blackwell, Hirsh V. Marantz, pg 20

February 1967 v.18 n. 6

An Advanced Nw Network Analyzer for Sweep-measuring Amplitude from 0.1 to 12.4 GHz, by Orthell T. Dennison, Richard W. Anderson, pg 2-10. 8410A, 8411A, 8413A, 8414A, 8740A, 8741A, 8742A.

The Engineer, Automated Network Analysis and the Computer – Signs of Things to Come, by Paul C. Ely, Jr., pg 11-12

[Author:] Paul C. Ely, Jr., pg 12

S-Parameter Techniques for Faster, More Accurate Network Design, by Richard W. Anderson, pg 13-22.

See Also: Correction: Two equations in the table on pages 23-24 in “S-Parameter Techniques for Faster, More Accurate Network Design” contain incorrect signs, page 8 in the March 1967 issue

Useful Scattering Parameter Relationships, pg 23-24

March 1967 v.18 n.7

Cover: Plug-in logic board from the new -hp- Model 2116A Instrumentation Computer

A Computer for Instrumentation Systems. Problems of interconnection, programming and environment arise in the design of systems containing both computers and instruments. They are solved in advance by this new integrated-circuit computer, by Kay B. Magleby, pg 2-10. 2116A.

[Author:] Kay B. Magleby, pg 10

Successful Instrument-Computer Marriages. Instrumentation computers are designed to be easy to incorporate into any system which contains electronic, chemical or medical instruments. Here are four remarkably varied examples of how these computers are being used, pg 11-12. 2116A.

A Wideband Analog Frequency Meter and FM Discriminator, by Peter R. Roth, pg 13-18. 5210A, 5210B, 1053A.

[Author:] Peter R. Roth, pg 18

Phase Noise and Phase Modulation Measurements with the Analog Frequency Meter, by Peter R. Roth, pg 18-20

Correction: Two equations in the table on pages 23-24 in “S-Parameter Techniques for Faster, More Accurate Network Design”, page 13 in the February 1967, issue contain incorrect signs, pg 8

April 1967 v.18 n.8

Cover: Measuring the Ocean’s Temperature

Frequency Divider Extends Automatic Digital Frequency Measurements to 12.4 GHz. This sophisticated instrument lets an electronic counter measure microwave frequencies while retained the accuracy and simplicity of the counter, by Robert L. Allen, pg 2-8. 5260A, 5240A.

[Author:] Robert L. Allen, pg 6

Frequency Divider + Integrated-circuit Counter = 12.4 GHz Digital Frequency Meter, pg 5

Precision Measurement of Ocean Temperatures. As ocean research becomes more sophisticated, greater precision in temperature measurement is needed, by Albert Benjaminson, pg 8-12. 2832A, 2833A, 2801A.

[Author:] Albert Benjaminson, pg 12

Improved Intermodulation Rejection in Mixers. Intermodulation distortion, always a problem in mixer design, can be largely prevented by a careful choice of bias and power levels, by Jack H. Lepoff, A. Michael Cowley, pg 13-16

[Authors:] A. Michael Cowley, Jack H. Lepoff, pg 15

May 1967 v.18 n.9

Cover: Locating Gas Leaks Ultrasonically

Pinpointing Industrial Defects with Ultrasonic Ears. Gas leaks, corona, and other defects in industrial equipment can be located quickly by zeroing in on their high-frequency sounds. Ultrasonic translators allow men to hear and follow these normally inaudible sounds, by Robert L. Allen, pg 2-10. 4950A, 4918A, 118, 4905A, 116, 117, 4917A.

[Author:] Robert L. Allen, pg 9

How to Recover Weak Signals Buried in Noise. A new phase-lock synchronous detector enables this ac microvoltmeter to lock on to signals obscured by noise, by Raymond C. Hanson, pg 11-15. 3410A.

Typical Applications of -hp- Model 3410A, pg 12-14.

[Author:] Raymond C. Hanson, pg 15

Using a Precision AC Amplifier for Measurement and Calibration. Good gain accuracy and low distortion in a general purpose amplifier make it possible to extend the range of many instruments, by Rex James, pg 16-20. 463A.

[Author:] Rex James, pg 18

How the -hp- Model 463A Amplifier is Calibrated, pg 19

June 1967 v.18 n.10

Cover: Electronic Monitoring of Hospital Patients

The Role of Electronic Medical Instrumentation in Patient Monitoring, by H. Ronald Riggert, pg 2-11

[Author:] H. Ronald Riggert, pg 11

Precision Thin-Film Coaxial Attenuators. Semi-automated thin-film techniques yield attenuators that are exceptionally precise and wideband (dc to 18 GHz), yet so economical that they can logically be used even in non-critical applications, by Stephen F. Adam, pg 12-19. 8491A, 8491B, 8492A, 354A.

[Author:] Stephen F. Adam, pg 18

International Units, Multiple and Submultiple Prefixes, pg 20

July 1967 v.18 n.11

Cover: Model 7848A Ink Recorder being subjected to a programmed life test designed to check its reliability

Pressurized Ink Recording on Z-Fold Strip Charts. A pressure-modulated inking system and contactless pen-tip position feedback are two of many innovations in this new eight-channel recorder, by Robert A. Sanderson, pg 2-12. 7848A.

[Author:] Robert A. Sanderson, pg 11

Signal Conditioning Preamplifiers for Ink Recorder, pg 10. 8800 Series.

Advantages of Direct-Coupled Differential Data Amplifiers, by Morton H. Levin, pg 13-16. 8875A, 2470A.

[Author:] Morton H. Levin, pg 15

Errors in Data Amplifier Systems. Possible error sources in a data amplifier system and how they affect the choice of an amplifier, by Richard Y. Moss II, pg 17-20

[Author:] Richard Y. Moss, pg 20

August 1967 v.18 n.12

Cover: New step-and-repeat camera using the laser interferometer method of controlling mechanical positioning to high orders of accuracy

Implementing Integrated Circuits in HP Instrumentation. Some of the problem areas that Hewlett-Packard considered before introducing integrated circuits into instrumentation, by Max J. Schuller, Ian T. Band, Ed A. Hilton, pg 2-4

[Authors:] Ian T. Band, Ed A. Hilton, Max J. Schuller, pg 4

High-Accuracy Laser-Interferometer Camera for IC Masks, by Don M. Cross, pg 5-8

[Author:] Don M. Cross, pg 8

Integrated-Circuit Counters. Here is a designer-eye view of the impact of integrated circuits on electronic counters. Two new IC counters are described, by John W. McMains, Thomas P. O’Brien, pg 9-13. 521A, 5221A, 5211A, 524A, 5216A.

[Authors:] John W. McMains, Thomas P. O’Brien, pg 11

Semiautomatic System for Production Testing of Electronics Circuits, by Emil E. Olander, Jr., Dee L. Larson, pg 14-20

[Authors:]  Emil E. Olander, Jr., Dee L. Larson, pg 16

September 1967 v.19 n.1

Cover: Model 180A Oscilloscope displays a portion of pseudo-random Gaussian noise pattern generated by Model 3722A Noise Generator. Top instrument is a display unit from new HP Model 5400A Multi-Channel Analyzer.

Pseudo-Random and Random Test Signals. Using digital techniques, this precision low-frequency noise generator can synthesize repeatable, controllable, pseudo-random noise patterns as well as truly random noise, by Gordon T. Roberts, Brian W. Finnie, George C. Anderson, pg 2-17. 3722A.

[Authors:] George C. Anderson, Brian W. Finnie, Gordon T. Roberts, pg 14

Testing with Pseudo-Random and Random Noise. Pseudo-random noise is faster, more accurate, and more versatile than random noise in most measurement situations, pg 18-20

October 1967 v.19 n.2

A System for Measuring the Thermal Resistance of Semiconductor Diodes. A fast, automatic system for accurately measuring junction-to-case thermal resistance of semiconductor diodes, by Norman R. Galassi, Bernard S. Siegal, pg 2-9

[Authors:] Norman R. Galassi, Bernard S. Siegal, pg 8

Digital Frequency Synthesizer Covering 0.1 MHz to 500 MHz in 0.1 Hz Steps, by Alexander Tykulsky, pg 10-13. 5105A., 5110B.

Phase Noise in Frequency Synthesizers, by Al Tykulsky, Bob Maldewin, pg 14-16

Transform Methods for Linear Systems, by Michael O’Flynn, pg 17-20

[Authors:] Al Tykulsky, Bob Maldewin, pg 16

Transform Methods for Linear System. This is a highly condensed collection of reference material on transform methods, by Michael O’Flynn, Professor of Electrical Engineering, San Jose State College, pg 17-20

November 1967 v.19 n.3

Loudness Evaluation. Effective noise abatement calls for instruments that can measure loudness. But loudness is subjective, and instruments aren’t like people, by Wolfgang E. Ohme, pg 2-11

[Author:] Wolfgang E. Ohme, pg 11

Automatic Loudness Analysis. Measuring the subjective sensation of loudness is easy if you have one of these calibrated electronic ears, by Heinz Blasser, Helmut Finckh, pg 12-20. 8051A, 15109A.

[Authors:] Heinz Blasser, Helmut Finckh, pg 19

Loudness Analyzer aids Noise Reduction, Production Testing, Speech Analysis, pg 15

1968 UTC Offset Announced, pg 20

December 1967 v.19 n.4

Cover: HP glass technician is preparing to make the neck seal of the gun to the envelope of the Model 1300A large-screen CRT

Large-Screen High-Frequency X-Y-Z Display. Expanded-mesh CRT’s have made possible a bright 8 by 10 inch display with bandwidths greater than 20 MHz, by Charles House, pg 2-9

Repeatability and Settling Time, pg 5

[Author:] Charles House, pg 6

Factors in Designing a Large-Screen, Wideband CRT, by Milton E. Russell, pg 10-11

[Author:] Milton E. Russell, pg 11

“Flying Clock” Comparisons Extended to East Europe, Africa and Australia. Using portable atomic clocks, HP teams recently brought precise time and frequency information to 18 countries, by LaThare N. Bodily, Ronald C. Hyatt, pg 12-20.

See Also: Correction to “’Flying Clock’ Comparisons Extended to East Europe, Africa and Australia”,  by Leonard S. Cutler, page 10 in the March 1970 issue

Flying Clocks, pg 17

January 1966 v.17 n.5

Cover: Measuring Multi-Layer Liquid Depths with TDR

A New High-stability AC Voltmeter with a 10-MHz Frequency Range and 1% Accuracy. A new ac voltmeter with wide frequency coverage and enhanced accuracy is the first of its type to achieve a ground-referenced dc output, by Reid J. Gardner, pg 2-7. 400E.

Measurement of Liquid Layer Thickness with Time Domain Reflectometry, by James Brockmeier, pg 8. 140A, 1415A.

See Also: Correction: For Fig. 3 in the article “Measurement of Liquid Layer Thickness with Time Domain Reflectometry”, page 10 in the February 1966 issue

Design Leaders: Lionel Kay Danielson, Reid Gardner, pg 7

Stratospheric Warning, pg 8

February 1966 v.17 n.6

A New TV Waveform Oscilloscope for Precision Measurements of Video Test Signals. For testing TV transmission systems to meet the standards required for color TV, a special wideband oscilloscope has been designed, by Ralph R. Reiser, Richard E. Monnier, pg 2-6. 191A.

Continuous TV Monitoring with Vertical-Interval Test Signals. A brief description of the signals transmitted in TV channels for continuously checking channel quality, by Richard E. Monnier, Ralph R. Reiser, pg 7-10

Oscilloscope Design Leaders: Ralph R. Reiser, Richard E. Monnier, pg 10

Correction: For figure 3 in the article “Measurement of Liquid Layer Thickness with Time Domain Reflectometry”, page 7 in the January 1966 issue, pg 10

The ‘VITS’ Program for Intercity Television Network Testing, by S. C. Jenkins, pg 11-12. American Telephone and Telegraph Company.

[Author:] S. C. Jenkins, pg 12

March 1966 v.17 n.7

Cover: Low-Frequency RFI Measurements

A Sensitive, Wide Range DC Null Voltmeter with an Internal Bucking Supply for Zero Loading Error. A floating, high-sensitivity DC Null Meter measures voltages to below 1 microvolt and achieves virtually infinite input impedance with a bucking supply, by Charles D. Platz, pg 2-6. 419A.

Design Leader: Charles D. Platz, pg 5

A Portable DC Voltage Standard Providing 10 PPM Transfer Accuracy. A new type of instrument transfers precision dc voltages out of the standards laboratory to working areas, by Robert E. Watson, pg 7-10. 735A.

[Author:] Robert E. Watson, pg 9

RFI Measurements Down to 10 kHz with Spectrum Analyzer Converter, by John Cardoza, pg 12. 851B, 8551B.

See Also: Correction: In the article “RFI Measurements Down to 10 kHz with Spectrum Analyzer Converter”, the mixer input ports in Fig. 4 are incorrectly labeled, page 4 in the May 1966 issue

[Author:] John Cardoza, pg 11

April 1966 v.17 n.8

Cover: 1.5 x 10^-8 Accuracy DC Voltage Divider Using New -hp- Standard Resistors

A New Distortion Analyzer with Automatic Nulling and Broadened Measurement Capability. A new audio-RF distortion analyzer has been designed which, when roughly pre-tuned, tracks the signal to be measured and automatically nulls the fundamental frequency allowing for a more consistent measurement and also over a wider frequency range, by Charles R. Moore, pg 2-7. 334A, 331A, 332A, 333A.

Design Leaders: Charles R. Moore, Terry E. Tuttle, Larry A. Whatley, pg 5

An Adjustable Standard Resistor with Improved Accuracy and High Stability. A new standard resistor designed in the -hp- Standards Laboratory can be set to within +-.015 ppm of nominal, substantially facilitating precision calibration work, by E. Paul Hubbs, pg 8-14. 11100.

Stability of Capacitively-Loaded Emitter Followers – a Simplified Approach. The following analysis shows that simple adjustment in bias current will often stabilize the circuit, by Glen B. DeBella, pg  16

[Authors:] Paul Hubbs, Henry T. Hetzel, pg 14; Glenn B. DeBella, pg 15

May 1966 v.17 n.9

Cover: Measurements made with a single new wide-range instrument: The Vector Voltmeter

The RF Vector Voltmeter – An Important New Instrument for Amplitude and Phase Measurements from 1 MHz to 1000 MHz. A broadband two-channel millivoltmeter and phasemeter simplifies many measurements heretofore often neglected, by Fritz K. Weinert, pg 2-9. 8405A.

Design Leaders: Roderick Carlson, Fritz K. Weinert, pg 9

Selected Vector Voltmeter Measurements, pg 10-12

A Portable Battery-Powered Multi-Function Meter with Lab-Quality Performance. A fully-portable laboratory instrument is useful from 1 hertz to 4 megahertz at levels to below 1 millivolt, by James M. Colwell, pg 13-16. 427A.

Design Leaders: James M. Colwell, Noel M. Pace, pg 14

Correction: In the article “RFI Measurements Down to 10 kHz with Spectrum Analyzer Converter”,  page 12 in the March 1966, the mixer input ports in Fig. 4 are incorrectly labeled, pg 4

June 1966 v.17 n.10

An Advanced New DC-25 MHz Oscilloscope for Programmed Production Testing. A new oscilloscope has the special capability of maintaining its dc baseline without drift which leads to higher dc accuracy and the important characteristic of being programmable, by John Strathman, pg 2-7. 155A.

Design Leaders: Charles House, Norman Overacker, John Strathman, Roy Wheeler, pg 7

Time Domain Reflectometry in 75-OHM Systems, by Charles A. Donaldson, pg 9

[Author:] Charles R. Donaldson, pg 9

Rise Time Converters for Simpler TDR Testing of Band-Limited Systems, by Lee R. Moffitt, pg 10-11. 10452A, 10456A.

Design Leader: Lee R. Moffitt, pg 11

A Calibrated Susceptance for TDR Measurements of Small Reactive Discontinuities, by Richard W. Anderson, pg 12-13. 874A.

Design Leader: Richard W. Anderson, pg 13

A DC-Stabilized Oscilloscope Plug-In with 50-mV/CM Sensitivity. Freedom from dc drift overcomes one of the most troublesome effects in making oscilloscope measurements of transducer output and other small signals, by James R. Pettit, pg 16. 1407A.

Design Leaders: Jim Pettit, Tom Schroath, pg 14

July 1966 v.17 n.11

A Sensitive new 1-GHz Sampling Voltmeter with Unusual Capabilities. A voltmeter operating on the principle of incoherent sampling measures over wide frequency and voltage ranges while providing an output usable for signal analysis, by Fred W. Wenninger, Jr., pg 2-8. 3406A.

Design Leaders: John T. Boatwright, Ronald K. Tuttle, Fred W. Wenninger, Jr., Roger L. Williams, pg 7

Coherent and Incoherent Sampling, pg 4

Measuring Attenuation, SWR, and Substitution Loss with a Low-Noise, High-Precision SWR Meter. Effects of noise and other factors are presented for an improved SWR Meter used with crystal and bolometer type detectors, by Bradford G. Woolley, pg 9-13. 415E.

[Author:] Bradford G. Woolley, pg 12

Increasing Instrument Sensitivity with a Low-Noise Preamplifier. A guide to a number of applications in which measurements are simplified by a low-noise wide-band amplifier, by Robert B. Bump, pg 14-16. 465A.

[Author:] Robert B. Bump, pg 15

August 1966 v.17 n.12

A New DC-50⁺ MHz Transistorized Oscilloscope of Basic Instrumentation Character. A small-size portable oscilloscope with negligible trace drift and using plug-ins has been designed as the keystone of a complete oscilloscope system, by Floyd G. Siegel, pg 2-11. 180A, 1801A, 1820A, 1821A.

Short, Large Screen, High-Frequency CRT, pg 4

Compact, Wideband, Stripline Delay Line, pg 7

Electronically-controlled Oscilloscope Camera, pg 10

Design Leaders: William L. Green, Floyd G. Siegel, James D. Williams, pg 11

World-wide Time Synchronization, 1966. Time scales maintained at the world’s time-keeping center have been correlated with new levels of precision in the latest around-the-world flying clock experiment, by LaThare N. Bodily, Ronald C. Hyatt, Dexter Hartke, pg 13-20. Flying clock, 5060A.

First Cesium-beam Resonator, pg 17

[Authors:] LaThare N. Bodily, Dexter Hartke, Ronald C. Hyatt, pg 19

The Benchmark, pg 20. Flying Clock, 5060A.

September 1966 v.18 n.1

A New Universal Impedance Bridge with Simplified, Semi-Automatic Tuning. By using feedback to adjust one bridge element automatically, a bridge requiring only one balancing control is achieved, by Katsumi Yoshimoto, pg 2-5. 4260A.

Design Leaders: Haruo Itoh, Kimijiro Kikuchi, Hitoshi Noguchi, Kazu Suzuki, Katsumi Yoshimoto, pg 5

A System for Automatic Control of the ‘DQ’ Resistor in an Impedance Bridge, by Hitoshi Noguchi, Haruo Itoh, Katsumi Yoshimoto, pg 6-9. 4260A.

Appendix: AC Bridge Loci, by Hitoshi Noguchi, pg 10

A Plug-in Unit for Extending Counter-Type Frequency Measurements to 12.4 GHz, by John N. Dukes, pg 11-13. 5255A.

[Author:] John N. Dukes, pg 12

New FCC Rules for FM Stereo Frequency Control, pg 14

A Frequency Comb Generator with a Range from 1 MHz to Beyond 5 GHz, by Roderick Carlson, pg 15-20. 8406A.

Design Leaders: Roderick Carlson, Harley Halverson, pg 19

Accurate Determination of a Signal Frequency on a Spectrum Analyzer, pg 17

October 1966 v.18 n.2

Cover: Cutaway view of major new 12 GHz Sampling Device

An Ultra-Wideband Oscilloscope Based on an Advanced Sampling Device. The state of the oscilloscope art has taken a significant forward step with the development of a new oscilloscope that operates from DC to 12.4 GHz and displays signals as small as 1millivolt, by Darwin L. Howard, Allan I. Best, James M. Umphrey, pg 2-7. 1425A, 140A, 141A, 1410A 1411A, 1430A, 1431A, 1432A, 1424A, 1425A, 1104A, 1106A, 1105A.

Design Leaders: Allan I. Best, Darwin L. Howard, James M. Umphrey, pg 7

Ultra-fast Triggering and Ultra-Resolution TDR, pg 9-10

Second Symposium on Test Instrumentation, pg 11

New NBS Laboratories, pg 11

A DC to 12.4 GHz Feedthrough Sampler for Oscilloscopes and Other RF Systems. An important circuit development in the form of an ultra-wideband sampling device is leading to major new capabilities in electronic instrumentation, by Wayne M. Grove, pg 12-15

[Author:] Wayne M. Grove, pg 15

A Summary of Some Performance Characteristics of a Large Sample of Cesium-Beam Frequency Standards, by LaThare N. Bodily, pg 16-19. Flying clock, 5060A.

[Author:] LaThare N. Bodily, pg 19

Operation of the Portable Cesium-beam Frequency Standard, pg 19-20

Frequency Standards in the Omega Navigation System, pg 20

November 1966 v.18 n.3

Cover: A Precision DC Differential Voltmeter and Ratiometer

A Simplified DC Differential Voltmeter and Ratiometer for High-Precision Measurements. An easy-to-use dc differential voltmeter measures dc voltages from 1microvolt to 1100 volts with a resolution of 0.2 microvolt and with high accuracy. This instrument is also a precision ratiometer for comparing two dc voltages, by Lawrence J. Lopp, Jr., pg 2-7. 3420A, 3420B.

Using the DC Differential Voltmeter/ratiometer to Construct a 100:1 Precision Divider, pg 6

Design Leaders: Larry L. Carlson, Lawrence J. Lopp, Jr., Robert E. Watson, pg 7

ADAC – An Automatic System for Measuring Hall Effect in Semiconductors. One of the barriers to detailed materials analysis has been the large effort involved in data acquisition and reduction. This has been greatly reduced in the -hp- laboratories by a system called ADAC. New information on the electronic transport properties of InAs has been one of the first benefits of the system, by Egon Loebner, T. J. Diesel, Cristy M. Schade, pg 9-14. Automatic Data Acquisition Contoller.

Analysis of Solids with more than one type of Carrier, pg 11

Typical ADAC Data Reduction Procedure, pg 13

Design Leaders: T. J. Diesel, Egon E. Loebner, Cristy M. Schade, pg 14

A Study of Indium Arsenide using ADAC Equipment, pg 15-16

December 1966 v.18 n.4

Cover: Tape Recorder Heads being aligned under microscope

A new High-Performance 1.5 MHz Tape Recorder. A new instrumentation-quality tape recorder has been designed around a current-rather than voltage-sensing input amplifier. Decreased noise and wider bandwidth are direct benefits of this approach, by Gerald L. Ainsworth, pg 2-7. 3950 Series.

[Author:] Gerald L. Ainsworth, pg 6

Magnetic Tape Recording and Reproducing, pg 4

Square Wave Response of The HP Model 3950 Magnetic Tape Recording System, pg 6

A Current Preamplifier for Magnetic Tape Playback Systems, by Arndt B. Bergh, pg 8-9

[Author:] Arndt B. Bergh, pg 9

Wideband Cavity-type Coaxial Frequency Meters. A discussion of the construction used to achieve the broad frequency range of the -hp- microwave cavity wavemeter, by Anthony S. Badger, Stephen F. Adam, pg 10-12. 536A, 537A.

[Author:] Anthony S. Badger, pg 12

Simplified Technique for Evaluating Diode RF Performance, by Bernard Levine, pg 13

[Author:] Bernard Levine, pg 13

Swept-Frequency SWR Measurements in Coaxial Systems. An important new swept-frequency technique permits quick and accurate measurements of SWR in coaxial systems up to 18 GHz, by Stephen J. Adam, pg 14-20

[Author:] Stephen F. Adam, pg 19

Standard Broadcast Frequency Offset for 1967, pg 19

January 1965 v.16 n.5

A new Instrumentation-Class Tape Transport of Simplified Design, by Walter T. Selsted

New Tape Transport in Sanborn Magnetic Data Recording Systems, pg 3. 3907A, 3914A, 3917A, 3924A.

Bernard Oliver elected IEEE President, pg 5

Design Leader: Walter T. Selsted, pg 7

Senior Staff Engineers Appointed by -hp- Board of Directors, pg 8. Brunton Bauer, Arthur Fong, Arthur Miller.

February 1965 v.16 n.6

New Coaxial Couplers for Reflectometers, Detection, and Monitoring. Coaxial couplers with flattened response and high directivity facilitate swept-type measurements of several kinds, by Robert Prickett. 796D, 797D, 798C, 774D, 775D, 776D, 777D, X781A, 786D, 787D, 788C, 789C.

New Waveguide Crystal Detectors with Flat Response, by Robert Prickett, Lawrence Renihan, pg 6. 424A.

Design Leaders: Robert J. Prickett, Lawrence Renihan, pg 8

Atomic Time Adopted for WWVB, pg 8

March 1965 v.16 n.7

The Linear Quartz Thermometer – a New Tool for Measuring Absolute and Difference Temperatures. A linear-temperature-coefficient quartz resonator has been developed, leading to a fast, wide-range thermometer with a resolution of .0001 C, by Albert Benjaminson. 2880A, 2801A.

The Linear Coefficient Quartz Resonator, by Donald L. Hammond, pg 3

Design Leaders: Donald L. Hammond, Albert Benjaminson, pg 7

The Influence of Transistor Parameters on Transistor Noise Performance – A Simplified Presentation. Some factors that define the noise characteristics of junction transistors have been investigated and are presented here in graphic form. The data illustrates the magnitude of the noise parameters and their variation with operating point, by Rolly Hassun, Michael C. Swiontek, pg 8-12

Authors: Michael C. Swiontek, Rolly Hassun, pg 12

April 1965 v.16 n.8

Correlating Time from Europe to Asia with Flying Clocks. By means of portable cesium-beam clocks, time has been correlated to 1 microsecond at many of the world’s timekeeping centers and a comparison of four of the world’s best-known ‘long-beam’ frequency standards has also been made, by LaThare N. Bodily

Author: LaThare N. Bodily, pg 8

May 1965 v.16 n.9

A Combined DC Voltage Standard and Differential Voltmeter for Precise Calibration Work. An advanced instrument that generates precise, high-resolution dc voltages for calibration work is also a precision differential dc voltmeter with a constant and very high input impedance, by Robert E. Watson. 740A.

Design Leader: Robert E. Watson, pg 7

Phase Comparisons with LF Standard Broadcasts Controlled by ‘Atomic Time’, pg 8

June 1965 v.16 n.10

A New 10c/s-10Mc/s Test Oscillator with Enhanced Output Capabilities. The performance possible with state-of-art techniques has been incorporated in a general-purpose test oscillator, by Myles A. Judd. 651A.

A Low-Distortion Amplifier Supplying 10 Watts Peak from DC to Beyond 1 Mc/s. A new amplifier has sufficient bandwidth to enable it to serve at dc or RF and sufficient power to be used as an electro-mechanical driver, by Robert J. Strehlow. 467A.

Amplifier Design Leader: Robert J. Strehlow, pg 8

Test Oscillator Design Leaders: Noel M. Pace, Myles A. Judd, pg 8

Cycles Per Second and Hertz, by Editor, pg 8

July 1965 v.16 n.11

A Low-Frequency Oscillator with Variable-Phase Outputs for Gain-Phase Evaluations. A new l-f oscillator provides both sine and square outputs as well as adjustable-phase sine and square outputs over a range from 60 kc/s down to 0.005 c/s, by Richard Crawford. 203A.

Design Leaders: Richard Crawford, Donald E. Norgaard, pg 7

Extraterrestrial and Ionospheric Sounding with Synthesized Frequency Sweeps, by George H. Barry and Robert B. Fenwick (of the Stanford University Electronics Laboratories), pg 8-12. 5100, 5110.

August 1965 v.16 n.12

A Fast-Reading Digital Voltmeter with .005% Accuracy and Integrating Capability. A new Digital Voltmeter of very high accuracy makes readings from less than 100 Vdc to 1000 Vdc at maximum speeds of up to 15 readings per second, by William McCullough. 3460A.

Guarded Measurements with a Floating Voltmeter, pg 5

Voltmeter Design Leaders: William McCullough, Edward Holland, pg 8

Cable Testing with Time Domain Reflectometry, pg 8

September 1965 v.17 n.1

A Precision Analog Voltohmmeter with Automatic Ranging. An automatic analog voltohmmeter simplifies dc voltage and resistance measurements and gives higher measurement accuracy and speed than is usually obtained, by James F. Kistler, pg 2-6. 414A.

Autovoltmeter Design Leaders: Donald F. Schulz, James F. Kistler, pg 5

A Simple Method for Recording Fast and Low-Level Waveforms. A recently developed oscilloscope plug-in unit makes fast, convenient records of displayed signals and greatly reduces accompanying noise, by John N. Deans, pg 6-8. 1784A, 175A.

Recorder Plug-In Design Leaders: Donald Braidwood, Alan D. Henshaw, Keith McMahan, pg 8

October 1965 v.17 n.2

A Precision AC-DC Differential Voltmeter/DC Standard with High Versatility. A versatile new instrument measures ac voltages with high accuracy from 20 c/s to 100 kc/s by comparing the unknown to a precision dc voltage. It also measures dc voltages to 0.02% and supplies high-resolution dc voltages, by William G. Smith, pg 2-7. 741A.

Design Leader: William G. Smith, pg 7

A 200 kc/s – 500 Mc/s Frequency Conversion Unit for Mixing, Modulating, Phase-Detecting and Level-Controlling. A new untuned mixer operates over the extremely wide frequency range from 200 kc/s to 500 Mc/s and uses a double-balanced circuit for high versatility, by Victor E. Van Duzer, pg 8-11. 10514A.

Design Leader: Victor E. Van Duzer, pg 11

500 kc/s-500 Mc/s Frequency Doubler, by Victor E. Van Duzer, pg 12. 10515A.

November 1965 v.17 n.3

A Voltage-Programmable Low-Frequency Function Generator with Plug-In Versatility. A new generator produces sine, square, and triangular signals as low as 0.01 hertz either unmodulated or with various modulations, by Robert L. Dudley, pg 2-5. 3300A.

Design Leader: Robert L. Dudley, pg 5

‘Hertz’ Adopted by IEEE, pg 5

The Trigger/Phase-Lock Plug-In. A plug-in for the low-frequency function generator results in a variety of signals in the 0.01 to 100,000 hertz range, by Robert L. Dudley, pg 6-9. 3302A.

NBS Standard Frequency and Time Broadcast Schedule. The diagrams presented here, with explanatory notes, summarize the standard frequency and time services, provided by the National Bureau of Standards radio stations WWV, WWVH, WWVB and WWVL, pg 10

A Technique for Making Ultra-Precise Measurements of Microwave Frequency Stability. Standard laboratory instruments are interconnected to provide a system that measures the short-term frequency stability of microwave sources to a precision of better than 1 part in 10, by James A. Marshall, pg 11-12

[Author:] James A. Marshall, pg 12

December 1965 v.17 n.4

Cover: Energy Diagram for Schottky Barrier

The ‘Hot Carrier’ Diode as an Ultra-Fast-Detector, Mixer, and Switch, pg 2. HP Associates.

Hot Carrier Diodes, pg 3

Using the Hot Carrier Diode as a Detector, by Hans O. Sorensen, pg 2-5

Using the Hot Carrier Diode as a Microwave Mixer, by Milton Crane, pg 6-8

[Authors:] Milton Crane, Hans O. Sorensen, pg 5

January 1964 v.15 n.5

An RMS-Responding Voltmeter with High Crest Factor Rating, by Gregory Justice. Crest Factor. 3400A.

See Also: Crest Factor and Pulse Trains…; Clarification of the closing paragraph in “An RMS-Responding Voltmeter With High Crest Factor Rating”, on page 8 in the April 1964 issue

The Significance of Crest Factor, pg 4

Long-term Stability of the -hp- 130C Sensitive DC-500 KC Oscilloscope, by John Strathman, pg 6-7. 130C.

Precision of the United States Frequency Standard, pg 7

-hp- Factory Training Seminars, pg 8

February 1964 v.15 n.6

Time Domain Reflectometry, by B. M. Oliver

Time Domain Reflectometry with a Plug-in for the 140A Oscilloscope, pg 8. 1415A.

TDR with -hp- Sampling Scopes, pg 8. 188A.

March 1964 v.15 n.7

Broadband, Solid-state Amplifiers, by Alfred F. Gort. 462A, 461A, 11038A.

An Air-Bearing Spindle for Highly Precise Machining, by Edward H. Phillips, pg 5-7

International System of Units, pg 8

April 1964 v.15 n.8

A new Instrument for Measuring Microwave Frequencies with Counter Accuracy, by Rudolph F. Pasos. 2590A.

A New DC-4000 MC Sampling ‘Scope Plug-In with Signal Feed-Through Capability, by Wayne M. Grove, pg 5-8. 188A.

Crest Factor and Pulse Trains… Clarification of the closing paragraph in “An RMS-Responding Voltmeter With High Crest Factor Rating”, page 1 in the January 1964 issue, pg 8

New Time Information Added to WWV/WWVH Broadcasts, pg 8

May 1964 v.15 n.9

A 0-50 Mc Frequency Synthesizer with Excellent Stability, Fast Switching, and Fine Resolution, by Victor E. Van Duzer. 5100A, 5110A.

Digital Frequency Synthesis, by Bernard M. Oliver, pg 1

Notes on the Application of Frequency Synthesizers, by Victor E. Van Duzer, pg 7

Spectrum Extension to Above 500 MC, pg 7

Synthesizer Design Leaders, pg 8

June 1964 v.15 n.10

Precision Plug-In Frequency Measurements to 3000 Mc, by Charles M. Hill. 5245L, 5254A, 5253B.

Design Leader: Charles M. Hill, pg 4

Changes in Standard Broadcasts, pg 5

A New Oscilloscope Plug-In with Four 40-MC Channels, by James R. Pettit, pg 6-8. 175A, 1754A.

July 1964 v.15 n.11

A New Performance of the “Flying Clock” Experiment, by Leonard S. Cutler, Alan S. Bagley. Atomic clock.

A Measurement of the Ratio of the Zero-Field Hyperfine Splittings of Cesium 133 and Hydrogen, by Leonard S. Cutler, pg 6-7.

Authors: Alan. S. Bagley, Leonard S. Cutler, pg 8

Plant Distribution of a One-Volt DC Standard, by Richard Bean, pg 9-12

August 1964 v.15 n.12

A New Microwave Spectrum Analyzer, by Harley L. Halverson. 8551A, 851A.

EMC/RFI, pg 5

Broad Spectrum Displays, pg 7

Spectrum Surveillance, pg 8

Design Leaders: Arthur Fong, Harley L. Halverson, George C. Jung, pg 8

September 1964 v.16 n.1

Our Preparations at Hewlett-Packard for the Instrumentation of Tomorrow, by Frank J. Burkhard. [HP’s 25th year as a designer and maker of electronic measuring instruments]

Some Major –hp- Instrument Designs, pg 3

Some Notable Articles Published in the Hewlett-Packard Journal, pg 5

Hewlett-Packard Company: William R. Hewlett, David Packard, pg 8

October 1964 v.16 n.2

A VLF Comparator for Relating Local Frequency to U.S. Standards, by Dexter Hartke. Phase Comparator, 117A.

Frequency Calibration using LF Standard Broadcasts, pg 2

Design Leader: Dexter Hartke, pg 7

Tunable VLF Comparator, pg 8. DY-2365B.

November 1964 v.16 n.3

Absorption Modulators for Simple or Complex Microwave Modulation, by Douglas A. Gray. P-I-N Modulators, 8403A.

New Microwave Signal Sources with Signal Generator Capabilities, by Douglas A. Gray, pg 8. 8614B, 8616B.

December 1964 v.16 n.4

Microwave Harmonic Generation and Nanosecond Pulse Generation with the Step-recovery Diode, by Robert D. Hall, Stewart M. Krakauer. HP Associates.

Design Leaders: Robert D. Hall, Stewart M. Krakauer, pg 6

January/February 1963 v.14 n.5-6
A Versatile Wave Analyzer for the 1 kc to 1.5 Mc Range, by Stanley McCarthy. 310A.

A Quick, Convenient Method for Measuring Loop Gain, by Philip Spohn, pg 5. AC-21F.

March/April 1963 v.14 n.7-8
A New Microwave Modulator, by Nicholas J. Kuhn. 8714A.

A Convenient Probe for Sensing Magnetic Fields, by Arndt Bergh, pg 7. 3592A.

Using the Smith Chart with Negative Real-part Impedances or Admittances, by Harley L. Halverson, Luiz Peregrino, pg 8

New Submultiple Prefixes, pg 8

May/June 1963 v.14 n.9-10
A New Multi-Function Voltmeter for General Laboratory Use, by Paul G. Baird. 410C.

A Guarded Amplifier for Increasing Digital Voltmeter Sensitivity, by Donald H. Jenkins, pg 6. DY-2411A, DY-2401A.

July 1963 v.14 n.11
An 800-2400 MC Signal Generator with Automatically-Leveled Output Power, by James R. Ferrell. 8614A.

A Variable-Frequency AC Power Supply for General-Purpose Testing, by Duane P. Lingafelter, pg 6. 4301A.

August 1963 v.14 n.12
A Wide-Range RC Oscillator with Push-Button Frequency Selection, by Robert W. Colpitts. 241A.

Special Push-Button Audio Oscillator for Telephone Testing, by Robert W. Colpitts, pg 6. HO1-241A.

A Tunnel-Diode Pulse Generator with 0.1 Nanosecond Risetime, by Roderick Carlson, pg 7. 213B.

September 1963 v.15 n.1

A Basic New Wide-Band Oscilloscope with Planned Anti-Obsolescence, by Richard E. Monnier. 140A, 1415A.

The Time Domain Reflectometer, by Lee R. Moffitt, pg 6-7. 1415A.

The Radial Field Cathode-Ray Tube, pg 7

Amplifier Plug-ins, pg 8-9. 1401A, 1400A, 1403A, 1402A.

SweepGenerator Plug-Ins, pg 10-12. 1420A, 1421A.

October 1963 v.15 n.2
A General-Purpose Pulse Generator Producing High-Power, Fast-Rise Pulses, by Johan Blokker, George Kan. 214A.

A Clip-on Current Probe for Wide-band Oscilloscope Measurements, by John G. Tatum, pg 5. 1110A, 1111A.

NBS Inaugurates Higher Power VLF Standard Frequency Broadcasts, pg 8

November 1963 v.15 n.3
A New Multi-Purpose Digital Voltmeter, by Charles W. Near, David S. Cochran. 3440A.

Voltmeter Plug-ins, pg 3. 3441A, 3442A.

A New Coaxial Crystal Detector with Extremely Flat Frequency Response, by Russell B. Riley, pg 8. 423A.

December 1963 v.15 n.4
A New Series of Microwave Sweep Oscillators with Flexible Modulation and Leveling, by Robert L. Dudley. 691A, 691B.

Examination of the Atomic Spectral Lines of a Cesium Beam Tube with the -hp- Frequency Synthesizer, by Leonard S. Cutler, pg 8

January 1962 v.13 n.5
The Transistorized RC Oscillator, by David S. Cochran. 204B.

New One Watt TWT Amplifiers for more rapid Microwave Measurements, by George W. C. Mathers, pg 4-6. 489A, 491C, 493A, 495A.

February 1962 v.13 n.6
A New Digital Voltmeter Having High Rejection of Hum and Noise, by R. A. Andersen. 2401A.

A Versatile Digital Recorder for BCD Data, by Ed A. Hilton, pg 5. 562A.

A Digital-to-Analog Converter with High Output Resolution, by Ed A. Hilton, pg 8. 580A.

March 1962 v.13 n.7
A New Scope Plug-In for Convenient Measuring of Fast Switching Times, by Kay B. Magleby. 186A.

The Kilomegacycle Sampling Oscilloscope, by Roderick Carlson, pg 4. 185B, 187B.

A Digital System for Automatic Measurements of Switching Times, by H. C. Stansch, pg 6. DY-5844C.

April 1962 v.13 n.8
A New 50 MC Oscilloscope Based on an Advanced CRT Design, by Floyd C. Siegel. 175A.

Vertical Plug-Ins, pg 4. 1750A, 1752A, 1753A.

Horizontal Plug-Ins, pg 5. 1780A, 1781A, 1782A, 1783A.

May/June 1962 v.13 n.9-10
A Phase-Locking Synchronizer for Stabilizing Reflex Klystroms, by Albert Benjaminson. DY-2650A,

A New Wide-Application Klystron Power Supply, by Robert C. Allan, pg 5. 716A.

An Oscilloscope Camera with "Black Light" Graticule Illumination, by James A. Chesebrough, pg 8. 196B.

July 1962 v.13 n.11
The Present Attainments of Adjustable Power Supplies. Harrison Laboratories.

Representative List of Harrison Power Supplies, pg 8

August 1962 v.13 n.12
A DC-500 KC Oscilloscope with Extended Measurement Capabilities, by John Strathman. 130C.

September 1962 v.14 n.1
A New Generation of High-Speed Frequency Counters, by Tracy S. Storer, Charles M. Hill. 5243L, 5245L, 5251A, 5253A, 5261A, 5262A.

Counter Plug-ins, pg 4. 5251A, 5253A, 5262A, 5261A.

October 1962 v.14 n.2
A New Pulse Generator with Very Fast Rise Time, by Charles O. Forge. 215A.

Measuring Small, Stray L and C with Nanosecond Pulses, by Charles O. Forge, pg 6

November/December 1962 v.14 n.3-4
A Solid-State Operational Amplifier of High Stability, by Robert J. Strehlow. DY-2460A

Amplifier Plug-Ins, pg 3. DY-2461A-M1, DY-2461-M2, DY-2461A-M3, DY-2461A-M4.
 
A Portable Frequency-Response Test Set, by Don A. Wick, pg 6. 3550A.