1968 – HP Journal Index

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