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Portable Analyzer Speeds Test and Service of Microprocessor-Based Portable Analyzer Speeds Test and Service of Developing a Practical Automatic Television Microprocessor-Based System Parameter Measuring and Logging System An Automatic Video Signal Parameter New Products Measuring· Instrument with Logging Capabilities 1980 Volume 12 Number2 1980 1-ekscope COMMITTED TO EXCELLENCE Customer information from Tektronix, Inc. 1-ekscope Beaverton, Oregon 97077 CONTENTS Editor: Gordon Allison Portable Analyzer Speeds Test and Tekscope is a bimonthly publication of Tek­ Service of Microprocessor-Based tronix, Inc. In it you will find articles covering the System entire scope of Tektronix' products. Technical articles discuss what's new in circuit and com­ The Sony/Tektronix 308 Data Analyzer com­ ponent design, measurement capability, and bines parallel timing analysis, parallel state measurement technique. A new products sec­ analysis, serial state analysis, and signature tion gives a brief description of products re­ analysis in a single, compact, lightweight instru­ ment that is cutting dollars and hours from digital cently introduced and provides an opportunity to request further information. test and service functions. An Automatic Video Signal Parameter Measuring Instrument with Logging Capabilities Monitoring and logging television transmitter per­ formance is a tedious, time consuming job. Now it can all be done, automatically and unattended, by the Tektronix 1980 ANSWER. This microprocessor-based instrument digitizes the video signal and uses unique signal-processing techniques to make measurements more quickly and accurately than is possible by conventional means. Developing a Practical Automatic Television Parameter Measuring and Logging System Digitizing the broadcast video signal with suffi­ cient accuracy to allow measurements to broad­ cast standards provided some interesting chal­ Cover: The four displays in this photo show only lenges. High speed AI D and DIA converters the basic capability of the Sony/ Tektronix 308 developed in-house are coupled with precision Data Analyzer. This small, lightweight instrument offset and dither signals to provide resolution and packs more measurement power than you could accuracies equivalent to 11-bit digitization. normally carry using both hands. >-0•1~,l~•'•'U~;>c"C. !o~•~•J!l-no<.. <>' (>o ..1<;.p ·.~1 eP'~"·<""'.0."10"'~'· < '<'*••>•<>n New Products v ·~·~~'""'""'''· lb><csu-.,.,. ~ .,, ,,,• ..,, 11.~.,.;,, ~1 ,,,.i lM~·-'~ s-,.~,,, 4,-,f.;rl-.m•!t .,•<1<'<:~'1' ·•'P•••..--<'" A host of new products including digital scopes, a " · ,.,., · ·11fn•. h >=-·t~ : .,.:,~ l•;g11-~C~o•~ ·- •••• digital television test signal generator, a state-of­ the-art distortion analyzer, and a programmable oscilloscope calibrator apply the power of the rekscope microprocessor to meet your test and measure­ ment needs for today, and tomorrow. Tektronix is an equal opportunity employer. Copyright © 1980. Tektronix, Inc . All rights reserved. Printed in U.S.A. Tektronix produc ts are covered by U.S. and foreign pat­ ents. issued and pending . Information in this publication super­ sedes that in all previously published material. Specification and price change privileges re served. TEKTRONIX, TE K, SCOPE-MOBILE, and~ are registered trademarks of Tektron ix. Inc. TELEO UI PMENT is a registered trademark of Tektronix U.K. Limited. For further information, contact Tektronix, Inc., PO. Box 500. Beavert on, OR 97077. Phone: 503-644-0161: TWX 910-467-8708: Cable: Tek­ tronix. Subsidiaries and distributors worldwide. 2 Portable Data Analyzer Speeds Test and Service of Microprocessor-Based Systems Ne,v microprocessor-based products a re using serial state analysis. Signature announced almost daily. Hundreds more analysis compresses sequential data are in the design stage. The circuit com­ into a four character alphanumeric code plexity and diversity of signals present for quick GO/NO GO information. in these products complicate their man­ Modes that can be observed as clocked ufacture and ma intainability. It is im­ data can be tested using signature perative, therefore, to have a n effective, analysis. efficient means of testing and servicing Usually several different instruments such products. would be needed to acquire and display Figure l depicts a typical micro­ the varied signals in the desired format. processor-based system. Three major Now, all of these capabilities - parallel categories of signal are present: input timing, parallel state, serial state, and and output signals in serial logic, ad­ signature analysis - are combined in dress and data bus signa ls in parallel one lightweight, portable instrument, logic, and timing a nd control signals the Sony/Tektronix 308 Data Analyzer. such as CLOCK, READ, WRITE, RESET, The operation of the 308 is controlled etc. from a front-panel keyboard , which Ed Averill joined Tektronix three years ago after To test such a system effectively, each greatly simplifies mode and parameter completing his BSEE and a year of post­ type of signal must be monitored in an selection. Within the four basic opera­ graduate studies at the University of Nebraska. optimum manner and analyzed differ­ ting modes, there are several sub­ His work on the 308 included evaluation of both electrical and firmware design, which entailed ently. For example, the relationship of functions available. For example, in the spending three months in Japan. He is writing the clock and control signals is best parallel timing mode you can select the the thesis for his MSEE, and is studying to im­ a nalyzed using a parallel timing display. menu timing display, timing cursor dis­ prove his Japanese. Ed enjoys camping, hiking, Bus transactions a re usually observed play, or timing window display. In the and outdoor photography. He processes both color and black and white in his own darkroom. using parallel state analysis, and serial parallel and serial state modes there is a da ta through the communications port choice of four displays: menu, cursor, SIGNATURE STATE ANALYSIS ANALYSIS HEX BINARY OCT 7 55U 3E 00111110 122 3 8 27 01 00000001 126 MAP? 21 00100001 131 1 2 9 3 FE 11111110 135 U PPJ SF 01011111 137 TIMING ASYNC 110 AND CONTROL \ "''"" MEMORY \i DATA AND ii ADDRESS "' ::> "' SYNC 110 MPU CONTROL ASY NC 110 John Huber started his electronics career in the United States Navy as a Fire Control Technician. Since joining Tek in 1973, he has performed diverse functions from quality control of large­ screen storage display monitors to on-site serv­ TIMING ANALYSIS SERIAL ANALYSIS __n_n__n__f"Lf HEX BINARY ASCII ice of complex semiconductor test systems. 54 01010100 T ~ 48 0100 1000 H Currently, he is an applications engineer for 45 0100 0101 E Logic Analyzer Marketing. John is completing __n____n___n_ 20 0010 0000 work on his BSEE at the University of Portland. ____fL_____Jl 51 0101 0001 a For recreation. he enjoys racquet ball golf and woodworking Fig. 1. Typical microprocessor-based system requires varied data acquisition techniques for thorough analysis of its activities. 3 search, and compare. In the signature Acquired data is stored in an 8 x 252 input adds a bit for a total trigger word mode you can select either hold or repeat bit Data Memory. Stored data can then length of 25 bits. A word recognizer modes. In addition, there are several be copied into a Reference Memory and trigger output is provided for trigger­ diagnostic displays available for self­ be available for a Compare function. ing an oscilloscope or other external checking the 308's operation. However, only the contents of Data equipment. A menu displayed in the upper portion Memory can be displayed. In the Com­ When triggering internally from the of the screen lists the operating mode pare mode, differences in the two serial probe input, the menu calls for selected and the operating parameters memories are highlighted by display in defining two consecutive data bytes as to be set from the keyboard. The data inverse video. If the two memories the trigger word (figure 3). External entry format selected (hexadecimal, oc­ match, the 308 can automatically re­ triggering can be accomplished by a tal, binary, or decimal), sample or latch start data acquisition and continue until single bit via channel 0 of the Data Ac­ mode, pre or post-trigger display, trigger a difference in data is detected. The re­ quisition probe. A programmable trigger word, source, and delay, and other perti­ start feature allows an automatic search delay of up to 65,535 counts or words is nent parameters are included in the for an intermittent problem. A count of available in parallel and serial operating menu. It serves to direct the operator in the number of times the memories modes. Data displays can be either pre setting up the 308 and lets one know, at match is displayed at the bottom of the or post delayed trigger. In the pre mode all times, the current setup. screen. the delayed trigger is positioned at the 240th position in the 252 byte data Acquiring data Trigger versatility memory; in the post mode it is posi­ Data and trigger inputs are located at Quick, easy selection of a variety of ~rig­ tioned at the 13th position. Data acquisi­ the side of the 308 to keep the front panel ger modes is in keeping with the other tion can be stopped manually at any clear for operating ease. An eight chan­ attributes of the 308. The trigger word is time by pressing a STOP key. The last nel data probe provides inputs for ac­ defined from the keyboard and can be 239 bytes acquired are then displayed. quiring parallel data at rates up to 20 programmed in hexadecimal or other of MHz. Serial data and signature inputs the data entry modes. Eight inputs to the Data display are via a single, high-impedance probe. trigger are provided by the Data Acqui­ Once the data is acquired and stored, it Serial word lengths of 5, 6, 7 or 8 bits can sition probe. These can be augmented by can be displayed in one of several for­ be selected and data acquired at rates an optional 16-bit Word Recognizer mats.
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