February 1988 v.39 n.1

Cover: The ADC hybrid microcircuit of the HP 5185A Waveform Recorder in front of a display from a thermal modeling program

Precision Digital Oscilloscopes and Waveform Recorders. This precision instrument family consists of five digitizing oscilloscopes based on three waveform recorders and an analysis, display and I/O section, by James L. Sorden, pg 6-14. 5180T/U, 5183T/U, 5185T.

Waveform Recorder Software Design, by John Ketchum, pg 12-13.

See Also: Correction: The authors for the article “Waveform Recorder Software Design”, on pages 12-13 were listed incorrectly, page 47 in the April 1988 issue

Signal Conditioning and Analog-to-Digital Conversion for a 4-MHz, 12-bit Waveform Recorder, by Albert Gee, Ronald W. Young, pg 15-22. 5183A.

Adaptive Sample Rate: A First-Generation Automatic Time Base, by Nancy W. Nelson, Richard W. Page, pg 23-25. 5183A, 5183T.

Waveform Reconstruction Techniques for Precision Digitizing Oscilloscopes, by Allen S. Foster, Richard W. Page, pg 26-31

Digital Design of a High-Speed Waveform Recorder. Operation from dc to 250 MHz, where a clock cycle is only four nanoseconds long, makes timing a major concern in the design of the HP 5185A Waveform Recorder, by Steven C. Bird, Rayman W. Pon, Patrick D. Deane, pg 32-38

Printed Circuit Board Transmission Lines, pg 35

Waveform Recorder Design for Dynamic Performance. Quantizer on-chip delays and delay mismatches, low-order distortion in the input amplifier, and low levels of phase noise in the sampling clock can have significant effects on performance, by Bruce E. Peetz, Mark A. Unkrich, Steven C. Bird, Brian J. Frohring, pg 39-47. 5185A.

Fixed-Frequency Sine Wave Curve Fit, pg 48

Packaging a High-Performance 250-Megasample-per-Second Analog-to-Digital Converter, by Patrick D. Deane, Simcoe Walmsley, Jr., Farid Dibachi, pg 49-52. 5185A.

Precision Digitizing Oscilloscope Waveform Analysis, Display, and Input/Output, by Douglas C. Nichols, pg 53-64. 5180T/U, 5183T/U, 5185T, 5180A, 5183A, 5185A, 51089A.

Handling of  Significant Digits, pg 63

Developing a Printed Circuit Board Design System. HP’s Printed Circuit Board Design System (HP PCDS) was developed to meet the needs of electronic designers dealing with ever-increasing complexity and density, by Elaine C. Regelson, pg 65-67

Automating the Printed Circuit Board Design Process. Using a computer to place components on a printed circuit board and route most connections greatly simplifies the design process. To accomplish this, careful selection of the algorithms is essential, by Gary Jackoway, pg 68-71. PCDS.

Finding Paths in a Gridded Data Structure, pg 70

Managing HP PCDS with the Design System Manager. Engineering and design organizations must effectively manage design information to reap the productivity benefits of CAE/CAD systems. The Design System Manager addresses the information management needs in the HP PCDS design environment, by Paul S. Reese, Mark E. Mayotte, pg 71-76. Printed Circuit Design System.

Use of Filesets in HP PCDS, pg 73

Version Strings, pg 75

A Multidevice Spooler for Technical Applications. The variety and complexity of shared devices for CAD systems such as one used for printed circuit design require a flexible spooler with a common access method for all applications, by Deborah A. Lienhart, pg 77-80. PCDS.

Integrating Applications in a Design Management System. The many data files and applications involved in a CAD system required a sophisticated management system to preserve data integrity, prevent conflicts, and maintain design documentation, by Mark E. Mayotte, pg 80-83. DSM.

HP PCDS Library Module, by John M. Agosta, pg 82-83

Software Quality Assurance on the HP Printed Circuit Design System Project, by David E. Martin, pg 84-86. PCDS.

See Also: Reader Forum: Letter from Kevin Preston, Steve Robinson, Tony Peters, Kelly Ford regarding “Software Quality Assurance on the HP Printed Circuit Design System Project”; letter from author David Martin in response, page 82-83 in the August 1988 issue

Silicon-on-Insulator MOS Devices for Integrated Circuit Applications. Several techniques for fabricating regions of crystalline silicone on insulating substrates are available. These methods are described briefly and device design considerations introduced by the use of SOI are discussed, by Jean-Pierre Colinge, pg 87-93. Silicon-on-insulator.

Authors February 1988: James [Jim] L. Sorden, Albert [Al] Gee, Ronald [Ron] W. Young, Richard W. Page, Nancy W. Nelson, Allen S. Foster, Patrick [Pat] D. Deane, Rayman [Ray] W. Pon, Steven [Steve] C. Bird, Bruce E. Peetz, Mark A. Unkrich, Brian J. Frohring, Farid Dibachi, Simcoe Walmsley, Jr., Douglas [Doug] C. Nichols, Elaine C. Regelson, Gary Jackoway, Paul S. Reese, Deborah [Debbie] A. Lienhart, Mark E. Mayotte, David [Dave] E. Martin, Jean-Pierre Colinge, pg 94-96

April 1988 v.39 n.2

Cover: An Intricate and precise structure called a finline created by millimeter-waves technologies

Millimeter-Wave Sources and Instrumentation. The recent growth in developing and applying millimeter-wave systems has created a corresponding demand for millimeter-wave test instrumentation, by John R. Regazzi, Mohamed M. Sayed, pg 6-11. 83556A, 83554A, 83555A.

A New Generation of Millimeter-Wave Calibration and Verification Standards, by Julius K. Botka, Paul B. Watson, Doug Halbert, pg 8-9

Millimeter-Wave Vector Network Analysis, by Robert G. Dildine, James D. Grace, pg 12-18

Millimeter-Wave Source Modules. Driven by a microwave source, these modules double or triple the input frequency to generate output frequencies in the millimeter-wave range, by Robert D. Albin, pg 18-25.

Millimeter-Wave Source Module Interface, by John R. Regazzi, pg 20-21

2-GHz-to-20-GHz Amplifier, by Jeffrey W. Meyer, Mary K. Koenig, pg 22-23

High-Power Microwave Source for Millimeter-Wave Generation. This plug-in can serve directly as a high-power 8-to-20-GHz source or as a driver for a family of millimeter-wave sources, by Alan R. Bloom, Kenneth A. Richter, Andrew N. Smith, Roger R. Graeber, Ronald T. Yamada, pg 26-30. 83550A, 8355x.

Millimeter-Wave Detectors Extend Range of Scalar Network Analyzer, by Herbert L. Upham, pg 31-34. 8757A.

Waveguide Reflectometer Calibration, pg 33

Design and Performance of Millimeter-Wave Thermocouple Sensors, by Lee H. Colby, pg 35-38. Q8486A, R8486A.

Adapting UNIX Logon Mechanisms to Automation Applications. Although originally intended for software development and document preparation, the utilities provided by the UNIX operating system can be adapted in various ways for use by novice operators in an automated environment, by Marvin L. Watkins, pg 39-47

Correction: The authors for the article “Waveform Recorder Software Design”, on pages 12-13 in the February 1988 issue were listed incorrectly, pg 47

A Virtual User Simulation Utility. The vuser utility makes it possible to simulate one or several users on a system. It is a useful tool for all types of testing, particularly interactive testing. vuser runs under the HP-UX operating system on HP 9000 Series 800 and 300 Computers, by Kjell A. Olsson, Mark Bergman, pg 48-53

Vuser Run String Options, pg 51

An HP-UX Kernel Load and Measurement System. This system runs on HP Precision Architecture computers under the HP-UX operating system. It can be used to generate and measure different types of HP-UX kernel activities, by Kjell A. Olsson, Grace T. Yee, pg 54-60

Process Measures to Improve R&D Scheduling Accuracy. Improvement is possible if scheduling is regarded as a process subject to continuous measurement, by Richard M. Levitt, pg 61-65

Authors April 1988: John R. Regazzi, Mohamed M. Sayed, Robert [Bob] G. Dildine, James [Jim] D. Grace, Robert [Dale] D. Albin, Alan [Al] R. Bloom, Ronald [Ron] T. Yamada, Kenneth [Ken] A. Richter, Roger R. Graeber, Andrew [Andy] N. Smith, Herbert [Herb] L. Upham, Lee H. Colby, Marvin [Marv] L. Watkins, Mark Bergman, Kjell A. Olsson, Grace T. Yee, Richard [Dick] M. LeVitt, Wilfredo [Willy] T. Sagun, Thomas [Tom] Hornak, Gary L. Bladwin, Fred H. Ives, Albert [Al] W. Kovalick, Roland [Rolly] Hassun, Rafael F. Miranda, Peter [Pete] T. Thysell, Derrick T. Kikuchi, pg 66-68

An Arbitrary Waveform Synthesizer for DC to 50 MHz. Precision, flexibility, and repeatability of signals are ensured by a digital architecture. Two or more synthesizers can be synchronized to provide several sources of complex signals with an identical time reference, by Roland Hassun, Albert W. Kovalick, pg 69-77. 8770A.

Address Sequencer, by Matt Klein, pg 72-73

Glossary of Address Sequencer Terms, pg 73

Sampling Clock Requirements, by Douglas A. Larson, pg 76

A 125-MHz 12-Bit Digital-to-Analog Converter System. Advanced IC DAC technology and a system design approach were needed to achieve the performance of the HP 8770A Arbitrary Waveform Synthesizer, by Fred H. Ives, Thomas Hornak, Wilfredo T. Sagun, Gary L. Baldwin, pg 78-85. 8770A.

Arbitrary Waveform Synthesizer Applications in Magnetic Recording and Radar, by Roland Hassun, Albert W. Kovalick, pg 86-93. 8770A.

A Waveform Generation Language for Arbitrary Waveform Synthesis. Easier to use than conventional programming languages, WGL is the primary front-panel interface for the HP 8770A, by Rafael F. Miranda, Peter A. Thysell, Derrick T. Kikuchi, pg 94-96

June 1988 v.39 n.3

Cover: The advanced one-gigasample-per-second analog to digital converter which is the key element in the HP 54111D Oscilloscope

Statistical Issues in Setting Product Specifications. A primer on the use of statistics in specification setting, by Sherry L. Read, Timothy R. C. Read, pg 6-11

Robust Estimators, pg 7

Propagation of Error with Multiple Sources of Variability, pg 9

Boxplots, pg 11

Circuit Design Using Statistical Data Analysis. A methodology for setting limits of uncertainty on amplifier output power based on measured prototype data facilities the design of amplifiers that minimize output power variations. The result is a printed circuit board requiring no adjustments, by Karen Kafadar, Lynn M. Plouse, pg 12-17

Statistical Calibration of a Vector Demodulator. Circuit performance characteristics must be determined and accounted for in instrument calibration. This paper describes an algorithm for statistical demodulator calibration to guarantee high precision in the demodulated signal, by Karen Kafadar, pg 18-25

Appendix: Solving Nonlinear Least Squares Problems, pg 24

An Availability and Reliability Calculation Tool for Computer Systems. This software program helps R&D engineers make trade-offs in designing for reliability. It also provides marketing representatives with a tool to evaluate the reliability and availability of customer-defined systems, by Wulf D. Rehder, pg 26-29. Reliability, availability, and serviceability/supportability, RAS.

The Language of Dependability, pg 28

Project Management using Software Reliability Growth Models. At HP’s Lake Stevens Instrument Division, the Goel-Okumoto software reliability growth model has provided a means for more accurately predicting the duration of system testing and determining when to release a new product, by Gregory A. Kruger, pg 31-35

A Reliable, Autoloading, Streaming Half-Inch Tape Drive. Designed for rack mounting, this compact tape drive cleverly channels air flow to load different-sized half-inch tape reels automatically. It also features higher performance and reliability than its predecessor, by Ronald L. Abramson, Leslie G. Christie, Jr., Douglas R. Domel, Kraig A. Proehl, John W. Dong, pg 36-42. 7980A.

Streaming Tape Drive Control Electronics, by Bradfred W. Culp, Kraig A. Proehl, Jeffery J. Kato, Douglas R. Domel, David W. Ruska, Virgil K. Russon, Gerod C. Melton, Peter Way, Wayne T. Gregory, pg 43-54. 7080A.

Authors June 1988:Sherry L. Read, Timothy [Tim] R. C. Read, Karen Kafadar, Lynn M. Plouse, Wulf D. Rehder, Gregory [Greg] A. Kruger, Douglas [Doug] R. Domel, Kraig A. Proehl, Ronald [Ron] L. Abramson, John W. Dong, Leslie G. Christie, Jr., Bradfred [Brad] W. Culp, Wayne Thomas [Tom] Gregory, Gerod C. Melton, Peter Way, Jeffery [Jeff] J. Kato, Virgil K. Russon, David W. Ruska, John J. Corcoran, Ken Poulton, Knud L. Knudsen, Lewis R. Dove, Mark E. Mathews, Thomas K. Bohley, Joe K. Millard, David W. Bigelow, Donald [Don] D. Skarke, B. Allen Montijo, pg 55-57

A One-Gigasample-per-Second Digitizing Oscilloscope. This instrument’s high sampling rate makes it particularly useful for analyzing high-speed, one-shot occurrences. A blend of state-of-the-art designs was required to achieve this performance, by Joe K. Millard, pg 58-59. 54111D.

A One-Gigasample-per-Second Analog-to-Digital Converter, by Ken Poulton, John J. Corcoran, Knud L. Knudsen, pg 59-66. 54111D.

Repetitive versus Single-Shot Bandwidth, by John J. Corcoran, pg 60

Digitizer Hybrid, by Lewis R. Dove, Mark E. Mathews, pg 64-65

Front-end Signal Conditioning for a High-Speed Digitizing Oscilloscope, by Lewis R. Dove, Joe K. Millard, Thomas K. Bohley, David W. Bigelow, Mark E. Mathews, Donald D. Skarke, pg 67-69. 54111D.

Digital Filtering in a High-Speed Digitizing Oscilloscope, by B. Allen Montijo, pg 70-76

Dithering in the HP 54111D, pg 72

Digital Filters, pg 75

August 1988 v.39 n.4

Cover: Print cartridges for the HP PaintJet Color Graphics Printer and a photograph reproduced by the PaintJet printer

Design and Development of a Color Thermal Inkjet Print Cartridge. The printhead has to tolerate bubbles, nucleation defects, and localized ink property changes. It must also have long print quality life and be manufacturable in high volume. Testing to verify reliability and manufacturability covered thousands of pens, by Stephen J. Nigro, David A. Johnson, Jeffrey P. Baker, Vyomesh Joshi, pg 6-15. PaintJet.

Capillary Forces in a Foam Matrix, pg 12

Print Quality and Pen Development, by Dan Beamer, Mike Borer, May Fong Ho, Don Bergstedt, pg 14

Development of a Color Graphics Printer. Full-color graphics, reliability, and software support received high priorities in the development of the HP PaintJet Color Graphics Printer, by Hatem E. Mostafa, James C. Smith, Emil Maghakian, David C. Tribolet, pg 16-20

Color Communication Standard, by Don Palmer, Emil Maghakian, Ricardo Motta, pg 18

Manufacturability of the PaintJet Printer, by Eric Clarke, pg 19

Mechanical Design of a Color Graphics Printer. Among the issues were ensuring proper insertion of the print cartridge, making reliable electrical connections to it, moving the paper or film accurately, and designing a primer, by Lawrence W. Chan, P. Jeffrey Wield, Ruben Nevarez, Chuong Cam Ta, pg 21-27. PaintJet.

The Second-Generation Thermal Inkjet Structure. Changes in materials and processes increase resolution from 96 to 180 dots per inch and extend printhead life from 2 million drops to 7 million drops, by Ronald A. Askeland, Winthrop D. Childers, William R. Sperry, pg 28-31. PaintJet.

High-Volume Microassembly of Color Thermal Inkjet Printheads and Cartridges. Miniature parts and micrometer mechanical tolerances make high-volume assembly challenging. Adhesive selection was the first step. Special fixtures, tools, automatic machines with vision, instrumentation, and systems had to be developed, by Steven W. Steinfield, Peter M. Roessler, Timothy J. Carlin, Cheryl A. Boeller, pg 32-40

Automatic Alignment Machines, by Jeff Beemer, Mitch Levinson, Glen Oldenburg, Mick Trejo, Ed Wiesmeier, pg 34-35

JULIO, by Don Bergstedt, pg 37

Factory Systems, by Stan Evans, Carol Beamer, Mary Ann Beyster, Diane Fisher, Diane Armstrong, pg 39

Ink Retention in a Color Thermal Inkjet Pen. Keeping the ink in the pen and off the user is a nontrival engineering problem, by Mary E. Haviland, Brian D. Gragg, W. Wistar Rhoads, Jim L. Ruder, Joseph E. Scheffelin, Erol Erturk, pg 41-45. PaintJet.

Activating the Pen, by Erol Erturk, pg 43

Ink and Media Development for the HP PaintJet Printer. The ink, paper, overhead transparency film and printhead for the HP PaintJet Color Graphics Printer had to be designed as a system because of the complex interactions between these elements, by Donald J. Palmer, Mark S. Hickman, Peter C. Morris, Ronald J. Selensky, John Stoffel, M. Beth Heffernan, pg 45-50

Color Thermal Inkjet Printer Electronics. The design objectives were to minimize part count while maximizing cost/performance, by Philip C. Schultz, William J. Walsh, Jennie L. Hollis, pg 51-56. PaintJet.

Low-Cost Servo Design, by Mark Majette, David Ellement, pg 54-55

HP-RL: An Expert Systems Language. HP-RL is an integrated set of artificial intelligence programming tools that has been used at HP for many types of expert systems experiments, by Steven T. Rosenberg, pg 57-65. Representation Language.

About HP-RL, pg 59

Authors August 1988: Vyomesh Joshi, Stephen [Steve] J. Nigro, Jeffrey P. Baker, David A. Johnson, James [Jim] C. Smith, Emil Maghakian, David [Dave] C. Tribolet, Hatem E. Mostafa, P. Jeffrey [Jeff] Wield, Lawrence W. Chan, Ruben Nevarez, Chuong Cam Ta, Winthrop [Win] D. Childers, Ronald [Ron] A. Askeland, William [Bill] R. Sperry, Timothy [Tim] J. Carlin, Steven [Steve] W. Steinfield, Cheryl A. Boeller, Peter [Pete] M. Roessler, Brian D. Gragg, Jim L. Ruder, Erol Erturk, Mary E. Haviland, Joseph [Joe] E. Scheffelin, W. Wistar Rhoads, Ronald [Ron] J. Selensky, Peter C. Morris, Donald [Don] J. Palmer, John Stoffel, M. Beth Heffernan, Mark S. Hickman, Jennie L. Hollis, Philip [Phil] C. Schultz, William [Bill] J. Walsh, Steven T. Rosenberg, Alan L. Foster, James [Jim] P. Ambras, Randolph [Randy] N. Splitter, Mark L. Chiarelli, Lucy M. Berlin, Vicki O’Day, Serge L. Rudaz, Chin-Wang [Ching-Wang] Tu, Michael [Mike] D. Camras, Dennis C. DeFevere, Wayne L. Snyder, Louis W. Cook, David K. McElfresh, Frank M. Steranka, pg 65-70

MicroScope: An Integrated Program Analysis Toolset. MicroScope supports evolutionary software development by helping programmers understand complex programs written in Common Lisp, by James P. Ambras, Randolph N. Splitter, Alan L. Foster, Mark L. Chiarelli, Lucy M. Berlin, Vicki O’Day, pg 71-82

The Browser Construction Toolkit, pg 76

Using Templates in Cross-Reference Analysis, pg 77

Rule-Based Execution Monitoring, pg 79-80

Reader Forum: Letter from Kevin Preston, Steve Robinson, Tony Peters, Kelly Ford regarding “Software Quality Assurance on the HP Printed Circuit Design System Project”, pg 84 in the February 1988 issue; letter from author David Martin in response, pg 82-83

Red AlGaAs Light-Emitting Diodes. HP has recently released indicator and display products containing a new type of red light-emitting diode (LED) based on the aluminum gallium arsenide (AlGaAs) materials system. These LED’s offer a significant improvement in efficiency over the red LED’s that have previously been available but cost only slightly more., by Serge L. Rudaz, Chin-Wang Tu, Dennis C. DeFevere, Louis W. Cook, David K. McElfresh, Frank M. Steranka, Michael D. Camras, Wayne L. Snyder, pg 84-88

October 1988 v.39 n.5

Cover: The HP-UX 6.0 discless operating system

Discless HP-UX Workstations. HP-UX 6.0 provides low-cost discless workstation operation over a local area network. It also provides a single file system view, intervendor file sharing, and conformance to UNIXÒ System V Interface Definition (SVID) semantics, by Scott W. Wang, pg 6-9

Program Management, by Scott W. Wang, pg 8

A Discless HP-UX File System, by Joel D. Tesler, Debra S. Bartlett, pg 10-14

Discless Program Execution and Virtual Memory Management, by William T. McMahon, Ching-Fa Hwang, pg 15-20. HP-UX 6.0.

The Design of Network Functions for Discless Clusters, by Chyuan-Shiun Lin, David O. Gutierrez, pg 20-26. HP-UX.

Crash Detection and Recovery in a Discless HP-UX System, by Annette Randel, pg 27-32. HP-UX.

Boot Mechanism for Discless HP-UX, by Perry E. Scott, John S. Marvin, Robert D. Quist, pg 33-36

Discless System Configuration Tasks, by Kimberly S. Wagner, pg 37-39. Reconfig.

Small Computer System Interface. The SCSI standard is the newest interface for the HP 9000 Series 300 family of HP-UX workstations. It offers improved performance, simplicity in design, a wide choice of controller chips, and wide acceptance in the UNIX community, by Paul Q. Perlmutter, pg 39-45

SCSI and HP-IB, pg 44

X: A Window System Standard for Distributed Computing Environments. The X Window System allows applications running in different environments and on different machines to communicate high quality, graphical user interfaces over a network, by James B. Byers, Frank E. Hall, pg 46-50. X Window System.

Managing the Development of the HP DeskJet Printer. Forays into unexplored regions of technology are inevitable in the development of breakthrough products, but they must be limited and carefully managed, by John D. Rhodes, pg 51-54

Market Research as a Design Tool, by Alan Grube, pg 53

Human Factors and Industrial Design of the HP DeskJet Printer, by Don McClelland, pg 54

Development of a High-Resolution Thermal Inkjet Printhead. The HP DeskJet printer’s 300-dot-per-inch resolution is fundamental to its ability to produce laser-quality output, by William A. Buskirk, Robert N. Low, Richard R. Van De Poll, David E. Hackleman, Stanley T. Hall, Kenneth E. Trueba, Paula H. Kanarek, pg 55-61

Integrating the Printhead into the HP DeskJet Printer. The printhead support systems provide signals to energize the ink-firing resistors, electrical connections to the pen, a carriage to hold and move the pen, and elements to protect and maintain the pen, by J. Paul Harmon, John A. Widder, pg 62-66

DeskJet Printer Chassis and Mechanism Design. One mechanism moves the carriage while another uses a single motor to pick, feed, and eject paper and prime the pen. The polycarbonate chassis supports everything, by Kieran B. Kelly, David W. Pinkernell, Steve O. Rasmussen, Larry A. Jackson, John A. Widder, pg 67-75

Data to Dots in the HP DeskJet Printer. A microprocessor-controlled custom IC manipulates dot data to provide double-width, half-width, compressed, half-height, draft-quality, bold, underlined, and tall characters, and graphics too, by Claude W. Nichols, Mark D. Lund, Donna J. May, Thomas B. Pritchard, pg 76-80

The DeskJet Printer Custom Integrated Circuit, by Tom Pritchard, pg 77

DeskJet Printer Font Design, by Bruce Yano, pg 79

Firmware for a Laser-Quality Thermal Inkjet Printer. The firmware resident in the HP DeskJet printer is divided into generic printer code and printer specific code. An optional cartridge provides Epson FX-80 emulation, by Kevin R. Hudson, Claude W. Nichols, David J. Neff, Mark J. DiVittorio, Brian Cripe, Michael S. Ard, pg 81-86

Slow-Down Mode, by Claude Nichols, pg 82

Robotic Assembly of HP DeskJet Printed Circuit Boards in a Just-in-Time Environment. A high-speed machine places most of the surface mount components while a vision-guided robot places small components and plastic leaded chip carriers, by P. David Gast, pg 87-90

DeskJet Printer Design for Manufacturability, by Don Harring, pg 88

Fabricated Parts Tooling Plan, by Jeff Ward, pg 90

CIM and Machine Vision in the Production of Thermal Inkjet Printheads. Machine vision systems for DeskJet printhead production range from open-loop go/no-go systems to process verification systems to completely integrated process control systems, by Brian L. Helterline, Mark C. Huth, Robert F. Aman, Timothy S. Hubley, Gregg P. Ferry, Robert A. Conder, pg 91-98.

Whole Wafer Assembly of Thermal Inkjet Printheads, by Bob Aman, pg 92-93

Production Print Quality Evaluation of the DeskJet Printhead, by Timothy S. Hubley, pg 96-97

Economical, High-Performance Optical Encoders. These high-resolution optical encoders are inexpensive and easy to install, making closed-loop motion control feasible in high-volume, extremely cost-sensitive applications, by Robert Nicol, Mark G. Leonard, Howard C. Epstein, pg 99-106. DeskJet, HEDS-9000.

Basics of Optical Incremental Encoders, pg 100-101

A Complete Encoder Based on the HEDS-9000 Encoder Module, by Chris Togami, pg 105

Authors October 1988: Scott W. Wang, Debra [Debbie] S. Bartlett, Joel D. Tesler, Ching-Fa [Ching] Hwang, William [Bill] McMahon, David O. Gutierrez, Chyuan-Shiun Lin, Annette [Anny] Randel, John S. Marvin, Perry E. Scott, Robert D. Quist, Kimberly [Kim] S. Wagner, Paul Q. Perlmutter, Frank E. Hall, James [Jim] B. Byers, John D. Rhodes, Kenneth [Ken] E. Trueba, Richard [Rich] R. Van de Poll, Paula H. Hanarek, Robert [Bob] N. Low, William [Bill] A. Buskirk, Stanley [Stan] T. Hall, David E. Hackleman, J. Paul Harmon, David [Dave] W. Pinkernell, John A. Widder, Kieran B. Kelly, Steve O. Rasmussen, Larry A. Jackson, Donna J. May, Claude W. Nichols, Mark D. Lund, Thomas [Tom] B. Pritchard, Mark J. DiVittorio, Michael [Mike] S. Ard, Kevin [Hud] R. Hudson, Brian Cripe, David J. Neff, P. David [Dave] Gast, Robert [Bob] F. Aman, Brian L. Helterline, Gregg P. Ferry, Timothy [Tim] S. Hubley, Mark C. Huth, Robert [Bob] A. Conder, Robert [Rob] Nicol, Mark G. Leonard, Howard C. Epstein, pg 107-112

December 1988 v.39 n.6

Cover: The autocorrelation functions of two complementary Golay codes merge into their sidelobe-free sum in this representation of the signal processing technique implemented in the HP 8145A Optical Time-Domain Reflectometer

A High-Speed Optical Time-Domain Reflectometer with Improved Dynamic Range. This article presents basic information on optical time-domain reflectometry and introduces the HP 8145A, which uses a data correlation technique to increase measurement speed and dynamic range, by Franz Sischka, Michael Fleischer-Reumann, pg 6-13. OTDR.

Technical Risk Reduced by Joint Development Effort, by Michael Fleischer-Reumann, Steve Newton, pg 8

Complementary Correlation Optical Time-Domain Reflectometry. The autocorrelation function of a complementary Golay code pair has zero sidelobes, making these codes ideal for spread-spectrum optical time-domain reflectometry, by Mosche Nazarathy, Franz Sischka, Steven A. Newton, pg 14-21. OTDR.

Optical Component Design for a Correlation-Based Optical Time-Domain Reflectometer. The major requirements for the laser driver, optical system, and receiver were single-mode, two-wavelength operation, high linearity, low noise, and low insertion loss, by Jurgen Beck, Siegfried Gross, Robin Giffard, pg 22-28. 8145A.

Signal-to-Noise Ratio for Detection Using a PIN Diode, pg 27

Data Processing in the Correlating Optical Time-Domain Reflectometer. A powerful special-purpose digital signal processor, a general-purpose main processor, and pipelined measurement firmware work with the optical components to make measurements, by Jochen Rivoir, Wilfried Pless, pg 29-34. 8145A.

Optical Time-Domain Reflectometer User Interface Design. The firmware built into the HP 8145A OTDR is the invisible intelligence that makes a complex instrument easy to use, by Joachim Vobis, pg 35-38

Printing on Plain Paper with a Thermal Inkjet Printer. An understanding of “plain papers” and how their variability affects performance played a key role in the development of the HP DeskJet printer, by Steven J. Bares, pg 39-44

Host Independent Microprocessor Development Systems. A new architecture makes it possible to use this family of emulators with workstations, mainframes, or personal computers. The cabling technology and chassis design improve performance and usability, by Arnold S. Berger, pg 45-51. HP 64700 Series.

Host Independent Emulator Software Architecture. Built into the firmware of the HP 64700 Series host independent emulators in an entire microprocessor development system, by William A. Fischer, Jr., pg 52-56

Expanded Memory for the HP Vectra ES Personal Computer. This memory subsystem provides high-performance expanded memory and extended memory support for HP Vectra Personal Computer applications while maintaining compatibility with industry standards, by Gary W. Lum, Milton J. Lau, Wesley H. Stelter, pg 57-63

LIM EMS 3.2 and 4.0, pg 61

Expanded versus Extended Memory, pg 62

Index: Volume 39 January 1988 through December 1988. PART 1: Chronological Index, pg 64-65. PART 2: Subject Index, pg 66-69. PART 3: Product Index, pg 69-70. PART 4: Author Index, pg 70-71.

Authors December 1988: Franz Sischka, Michael Fleischer-Reumann, Moshe Nazarathy, Steven [Steve] A. Newton, Siegfried [Sigi] Gross, Robin Giffard, Jurgen Beck, Wilfried [Willy] Pless, Jochen Rivoir, Joachim Vobis, Steven [Steve] J. Bares, Arnold [Arnie] S. Berger, William [Bill] A. Fischer, Jr., Gary W. Lum, Milton J. Lau, Wesley [Wes] H. Stelter, Ulrich H. Haeberien, Alexander [Alex] Keller, pg 72-73

Generalization of the Redfield-Kunz Treatment of Quadrature Phase Time Data. A prescription is given to computer the complex Fourier transform spectrum from quadrature phase time data when the x and y signals are sampled neither simultaneously nor alternately. This case applies to the sampling scheme of the HP 5180A Waveform Recorder, by Alexander Keller, Ulrich H. Haeberlen, pg 74-76