1973 - HP Archive
Contents
1. IVYLNIJO AINO SYIWOLSNI Y S GHVXOVd L131M3H LECER E dwejs 92eld FOLD HERE io FOLD HERE o z 3 Place a Here USE OTHER MAILER HEWLETT PACKARD COMPANY FOR EUROPE 195 PAGE MILL ROAD PALO ALTO CALIFORNIA 94306 WWW HPARCHIVE COM SAFETY TIPS QUIZ SOLUTION SAFETY TIPS by Steve Fischer The experienced service person is always looking for ways to reduce the repair time on instruments Sometimes safety is compromised in the process unfortunately One of your primary concerns when servicing or maintaining an instru ment should be your safety and the safety of those who will use the product following your work on it It may be helpful for the novice as well as the veteran to review some precautions which should be taken during the servicing of any electrical product 1 Before removing covers even if you will need to make measure ments afterward disconnect the power source To rely on the in strument s power switch to discon nect both sides of the line may get you in trouble especially on older products Even if the power switch is double pole type you still risk the consequences of dropping a cover screw or your hand on the power input terminals while disas sembling the instrument 2 Before reconnecting the instru ment to power for making your measurements it is a good practice and should become routine to2. Explanation of the Smith Chart and its use 29 min Part of 2 presents a thorough review of microwave theory 54 min WWW HPARCHIVE COM S Parameter Design Techniques Part 2 describes the characteristics of HP s 12 GHz transistor including its S Parameters 56 min Troubleshooting Transistor Circuits Faster A valuable collection of proven trouble shooting techniques 17 min Troubleshoot FET Circuits Faster Describes the various types of FETs encountered in electronics equipment and discusses basic FET theory 16 min Numbering Systems and Digital Devices An examination of the binary numbering system to aid in conversion of numerical data to and from decimal binary octal BCD etc 25 min 90030 90030 90030 683 727 784 VIDEOTAPES Digital Building Blocks 90030 Characteristics of gates and flip flops and their applications 18 min Functional Analysis 90030 The basic functional building blocks of digital design and comprehensive coverage of algorithms 22 min Electrical Analysis 90030 Covers the specialized triggering require ments and noise problems unique to digital systems 20 min Data Communications 90030 Discusses basic data communications terminology component parts of a basic communications network and measure ment problems 29 min In addition many instrument related video tapes are available for specific HP products In many cases th
3. VOLUME 13 CALIBRATION OF AN OSCILLATOR by Marv Willrodt Calibration of acrystal oscillatorin a counter or other device requires several pieces of equipment plus a systematic procedure First of all one must have a reference standard which is more accurate than the specification to be met This usually takes the form of an in house fre quency standard a quartz os cillator a Rubidium frequency standard or a Cesium Beam fre quency standard The standard is compared to the National Bureau of Standards station WWVB on 60 kHz using an HP model 117A VLF com parator for locations within the con tinental United States or an ap propriate receiver to receive one of the other world wide frequency services for stations outside the U S For example the H44 117A can be used to receive station HBG in Prangins Switzerland WWYV high frequency transmissions should NOT be used for calibrating a high stability oscillator because the variations due to noise and doppler shift can introduce more error than 10to 100 days aging of the oscillator NUMBER 4 SEPT OCTOBER 1973 These transmissions can be used to calibrate an oscillator to a part in 106 or so and can be used to check a stable oscillator for gross error due to some malfunction This procedure is shown in Figure 1 The HP 5360A computing counter can be used to measure the os cillator frequency of most other devices since it will resolve 1 x 10 10 in one se
4. 8660B 8 Serials 1247400320 and below 500 MHz amplifier heatsink 8660B 9 Serial prefix 1247A and below Improved keyboard entry 8660B 10 Serials 1247400300 and below Improved 3M cable 14 pin connector 8660B 11 Serials 1312A00401 and below Digital control unit mechanical checks 8690 SERIES SWEEP OSCILLATORS 8690A 12A All serials Replacement of capacitors containing PCB 86200 SERIES RF PLUG INS FOR 8620A B 86242A 1 All serial numbers YIG oscillator replacement assemblies 86250A B 1 All serial numbers YIG oscillator replacement assemblies 11661A EXTENSION MODULE 11661A 3 All serials Installation checks and adjustments 86300 SERIES RF MODULES FOR 8620A B 86342A 1 All serials YIG oscillator replacement assemblies 86350A 2 AII serials YIG oscillator replacement assemblies 86351A 1 All serials YIG oscillator replacement assemblies 86352A 1 All serials YIG oscillator replacement assemblies 86320 86330 MODULES 86330A 4 Serial prefix 1142A and below Modification to 86330A and 86331A for compatibility with 8700A 86331A 2 Serial prefix 1142A and below Modification to 86330A and 86331A for compatibility with 8700A NAME ORDER FORM COMPANY NAME Please print vour name and address clearly This will be used as a shipping label e Order Form Supplement to Service Note Index C ADDRESS Check here to receive a qualification form for a free subscription to Bench Briefs CITY C Check h
5. 5061A Cesium standards 5065A Ruidium standard and similar high stability sources The 8405A vector voltmeter IN THIS ISSUE NEW SERVICE NOTES VIDEO TAPES SAFETY TIPS PROCEDURES FOR ADJUSTING OSCILLATORS YOUR PRIVATE LINE TO HP CUSTOMER SERVICE WWW HPARCHIVE COM WWV 2 0 5 10 15 20 25 MHZ WWHV Z5 10 19 MHZ HF COMMUNICATIONS ADJUST OSULLATOR FOR ZERO BEAT INDICATION ON TUNING METER HEADPHONES OR OSdILLoscore CRYSTAL DSULATOR THiS PROCEDURE S GOOD ONLY OQ CALIBRATING AN OSCILLATOR 70 PART WA MILLION Og SO THIS CORRESPONDS TD N ERROR OF 27 TO Buz IN DETERMINING ZERO BEAT can also be used to make high resolution phase comparisons between frequency standards as outlined in Application Note AN 77 2 Precision Frequency Comparison Figure 3 which is taken from the 117A manual is useful for determin ingthe offset between two standards when the phase change and the time required for the phase change are known Special templates are sup plied with the 117A VLF comparator so this offset can be read without charts or calculations For example assume that on a particular day the phase change is 10 8us in 1 hour This corresponds to a frequency offset of 3 parts in 109 Assume that the phase change 24 1 0 0 2 OR ANY INTEGRAL MULTIPLE OF HEADPHONES OCAILLATOR UNDER TEST TRIGGERED MEP OLULINE FATTERN MOVEMENT UNKNOWN HiGH lt UNKNOWN
6. 5326 5327 SERIES UNIVERSAL TIMER COUNTER 5326A B C 5327A B C 4 All serials Modification to prevent QI and Q2 failures 5326 5327 5 All serials Field installation of tion 011 326A 5327 6 All serials Field installation of Option 010 5326 5327 7 All serials Optional addition of fuse to protect 175 volt power supply 53404 MICROWAVE FREQUENCY COUNTER 5340A 1 Serial number 1252400269 and below Modification to eliminate oscillation on Hi Z input 5340A 2 Serial number 1320A00450 and below Modification to improve chassis vibration stability 5340A 3 All serials Troubleshooting and checkout information for HP interface bus Opt 003 5340A 4 All serials Mixer assembly 11 calibration after 110 replacement 5360A COMPUTING COUNTER 5360A 6 All serials List of parts in the 5360A Computing Counter service kit HP part number 10636A 5360A 7 Serials below 1240401076 New pana plex display for improved reliability 8410A NETWORK ANALYZER 8410A 6 Serials 935 01131 through 1144402227 New replacement hardware for mounting fan 8410 7 Serials 1310402411 and below Modification to eliminate inherent cross talk problems associated with the rear panel outputs 8605 COMMUNICATIONS SWEEP OSCILLATOR R605A 1 Serial number 1317400210 and below Improved operational amplifiers for A2 and A3 driver assemblies 8605A 2 Serial number 1317A00220 and below Power line filter capacito
7. check the continuity of the third wire ground if the product is equipped with a three wire power cord An ohmmeter connected from the instrument chassis or case to the ground pin on the plug should read less than 1 0 ohm Flex the cord a few times while making this measurement to detect any inter mittent break A cord may look good and still be open or intermittent so be certain to check it thoroughly 3 Instruments should be con nected only to outlets that are properly connected to earth ground If a three wire to two wire adaptor is used be certain to connect the green wire to a good ground Prod ucts have a third wire connected to chassis to protect the operator in the event of a short circuit in the instrument Maintaining a good earth ground connection will ensure having this protection Making measurements carefully deliberately and one at a time will reduce the chance of an error or accident Taking a few extra sec onds to work safely is time well spent Steve Fischer is the Product Safety Officer at Hewlett Packard in Palo Alto Previously he was a Product Support Engineer at the Avondale Pennsylvania division Additional tips of this nature will be published in future issues WWW HPARCHIVE COM SHORT QUIZ SOLUTION The last issue presented a cube of 42 ohm resistors and asked for the equivalent resistance between points A and B Also how much voltage can be placed between A B without exceed
8. format B l inch Sony format D 34 inch Sony U matic videocassette format For example to order Choosing the Right AC Voltmeter for a Sony playback unit place your order for each 90030C Opt 605 Choosing the Right AC Voltmeter The U S prices range from 75 to 150 each depending on the tape size and the quantity ordered To order any tape or for more information contact your local HP office Below is a listing of video tapes currently available in the Tutorial Series Product Option Count Any Signal 90030 635 The proper AC DC Switch Attenuator Choosing the Right AC Voltmeter 90030 605 and level control settings for a frequency Overview of the field of AC measurements counter for all types of signals 10 min identifying the proper AC voltmeter for measuring AC current etc 22 min Time Interval Measurement 90030 637 Review of the function known as Time Improved Counter Measurements 90030 721 Interval T I and how to select compatible Instruction on how to find the total instruments 15 min measurement error of a frequency measurement etc 23 min Time Interval Averaging 90030 633 thorough program offering sound Basic Electronic Counter Functions 90030 534 practical advice on Time Interval The seven basic counter functions best Averaging 24 min suited to a particular measurement need 17 min What Is A dB 90030 614 An explanation with examples of The Reflectometer Cal
9. of putting an entire service manual on several 4 by 6 inch cards These are then used with a viewing machine to retrieve the information Thus the amount of storage space needed for manuals is greatly reduced in fact many times the documentation for an instrument can be stored 1 Approximately how many file cabinet drawers or equivalent space are filled with HP service manuals at your facility in a small pocket inside the instrument We would like your opinion about microfiche 2 Have you ever used a microfiche viewer yes 3 What was your reaction to this method of retrieving data in the manual extremely good 4 Do you regularly use a microfiche viewer good yes reaction If yes do you know what reduction ratio was incorporated Jno If yes could you also answer questions 3 thru 8 bad extremely bad in the microfiche you now use check all applicable reduction 120 to 1 124 to 1 42 to 1 48 to 1 other 5 Would you be interested in receiving future HP service manuals on microfiche definitely yes perhaps L Juncertain probably not definitely not 6 What advantages of microfiche do you feel are important to you 7 What disadvantages do you see B Any other comments ALONG THIS LINE Thanks for your help WWW HPARCHIVE COM gzuzna gvaio SGNV1H3SHLAN JHL WNYLN3D 1OHdIHOS EELE 055 01 Od
10. 136A 2 Serials prefixed 705 and below Y2 chopper replacement 11504 PROGRAMMABLE WAVEFORM PROCESSOR 1150A 1 Removal of boards from Blue Stripe program 1208A B DISPLAY 1208A 11 2 Serial prefix 1130A and below Changes on storage pulse assembly A4 1208A H11 3 Serial prefix 1212A and below Modification to improve storage uniformity 1300A X Y DISPLAY 1300A H82 1 All serial prefixes Transfer to production option status 1308A 5 Serial prefix 1303A and below New CRT graticule 1308A 6 Serial prefix 1315A and below Addition of heat sinks on X Y output stage transistors 1309A 4 All serial prefixes Error in manual change sheets 1309A 5 Serial prefix 1252A and below New CRT graticule 1309A 6 Serial prefix 1318A and below Addition of heat sinks on X Y output stage transistors 13104 COMPUTER GRAPHIC DISPLAY 1310A 6 Serial prefix 1301A and below Correction for drive defocusing 1310A 7 Serial prefix 1301 A and below Improved high voltage power supply 1310A 8 Serial prefix 1316A and below Modification to reduce coupling between the Z Axis input and the X Y inputs 13114 COMPUTER GRAPHIC DISPLAY 1311A 6 Serial prefix 1238A and below Correction for drive defocusing 1311A 7 Serial prefix 1238A and below Improved high voltage power supply 1311A 8 Serial prefix 1316A and below Modification to reduce coupling between the Z Axis input and the X Y inputs 1402A DUAL TRACE AMPLIFIER 1402A 9 Serials pref
11. 35 min 5050A B Digital Recorder Maintenance 90060_ Maintenance procedures for the printer mechanism section of the 5050A B 43 min WWW HPARCHIVE COM 783 785 786 787 298 490 566 513 456 616 663 300 MORE ON dB AND using the technique to obtain an approximation for these situations dBm WITHOUT LOGS As many readers pointed out any aged because can then share number can be calculated with your comments with all the read Many readers commented on the combinations of 10 and 3 For exam article in May June issue about 8dB is 10dB 10dB Sra indicate the type ol ariclos determining power ratios from dB 3dB 3dB or a power ratio that are preferred and they thus without the use of logarithms of 10 x 10 x x 2 or 6 25 help determine the content of page 4 It should also be pointed out that this service publication Thanks The article states that not all num this method introduces a very small for the feedback bers can be calculated with this error because 3dB is not exactly a The Editor method and it goes on to suggest ratio of 2 to 1 BENCH BRIEFS IS PUBLISHED PERIODICALLY BY HEWLETT PACKARD FOR CUSTOMERS ENGAGED IN CALIBRATION MAINTENANCE TEST AND RELATED AREAS TO OBTAIN A QUALIFICATION FORM FOR A FREE SUBSCRIPTION OR TO SUBMIT A CHANGE OF ADDRESS SEND YOUR REQUEST TO Hewlett Packard Co 195 Page Mi
12. 4 1106 4 FREGMENCY DEVIATION ORIG FEQ 4 LINE VOLTAGE APPUED Fig 8 Four Typical Counters at Room Temperature Disconnected from line Voltage for more than 48 hours CALIBRATION OF AN OSCILLATOR cord is energized A warm up curve for the 5245M 105A crystal oscilla tor Figure 9 which was measured using the Frequency Multiplier Set up is also included In this case both the oven and oscillator operate whenever the power cord is plugged into a live outlet Once the oscillator has been cali brated the easiest way to determine the total error in any measurement is to look for the accuracy chart in the manual for the counter of in terest Figure 10 is the accuracy chart for a 5245L counter This chart takes into account all of the errors in the frequency or period modes of operation Each counter will have its own error chart so be sure to use the correct one for your model of counter To determine the error locate the input frequency being measured on the horizontal scale For frequency measurements move upward to the appropriate line for the gate time selected by the front panel control For period average measurements move upward to the appropriate line for the number of periods being averaged Then move left to read the total error which can be ex pressed as a fraction as a power of ten
13. 5214L preset counter Widely recognized as a fre quency standards expert Marv is the author of many contribu tions to the electronics industry his most recent involvement has been as one of the authors in a McGraw Hill book Basic Elec tronic Instrument Handbook which is edited by Clyde Coombs He is a stereo sound enthu siast in addition to a photography buff WOGHE NGH Service Notes for your instru ments can be obtained by On the next page is a listing of the latestService Notes avail using the Service Note Order able for Hewlett Packard Form When the order form is products Service Notes contain removed it can be folded two information that will help you ways European customers get the most out of your d gr ipli Su expose purchases Hewlett Packard S A Many times design changes or Central Mailing Department other improvements are made Es Box 7550 reeport Building in products currently being SCHIPHOL Centrum manufactured HP often recom The Netherlands mends including these changes For the U S and elsewhere in products previously sold fold the order form to expose this is done by writing a Service Hewlett Packard Company Note for the product 195 Page Mill Road Palo Alto California 94306 OCTOBER 1973 WWW HPARCHIVE COM NN SIA M 51 Equipment necessary to calibrate and check performance of HP Real Time Oscilloscopes 136A X Y RECORDER
14. LOW gt KEFGRENCE FREQUALY STANDARD SWEEP SPEED ge CM Q Iu Se M Ol pSec om cu Se 1 1 exc x 107 ix toe 1 0 10 hours later is 3 6us 1 hour This corresponds to a frequency offset of 1 part in 109 Thus the aging rate for this 24 hour period is the difference between the offsets This is 2 parts in 109 if the offsets are both higher than or both lower than the reference The aging rate is 4 parts in 10 if one reading is above and one reading below the reference frequency The frequency offset chart is determined by noting that an hour contains 3 6x109us Thus dividing this into a given frequency change in us per hour will yield the offset In the first example above 10 8us hour 3x10 3 6 x 109us hour FREQUENCY MULTIPLIER METHOD WITH 1642 uev TEST HOURS TE 1 Fig 3 Frequency Offset Chart Fig 4 WWW HPARCHIVE COM A frequency multiplier as shown in the block diagram of Figure 4 can also be used to increase the resolu tion with which a crystal oscillator frequency can be measured in a given measurement time The times 200 multiplication in this case was achieved by using a 5245M 5254C The unknown stand ard was connected to the EXTER NAL standard input on the 5245M The 5245C is tuned to 1 0 GHz and the 1 GHz output is taken from the coax which conne
15. cond Other counters are generally not satisfactory for setting precision oscillators because even on a 10 second gate the 1 count error for a one megahertz signal is 1x107 whereas a good oscillator can easily have a stability 10 to 1000 times better than this TRIGGERED OSCILLOSCOPE METHOD A triggered sweep oscilloscope is the easiest device to use for setting one oscillator to agree with another Resolution is good furthermore the oscilloscope gives a continuous in dication of both the direction and magnitude of error In addition H when the unknown oscillator is ad justed to stop the motion of the scope pattern any errors in the scope sweep drop out completely See Figure 2 PHASE DETECTOR WITH STRIP CHART RECORDER While the oscilloscope method still works when comparing very stable oscillators for instance when com paring a Rubidium standard to a Cesium standard a phase detector driving a strip chart recorder gives a more useful record Since the record is continuous the operator can visually ignore noise and other ob vious known discrepancies when making the comparison A modified version of the 117A can be used to make a phase com parison between an unknown 100 kHz standard and the local standard as well as compare the local stan dard to WWVB HP has also built the K05 5060A and K19 5061A linear phase comparators for making high resolution comparisons between 105A B oscillators 5060A
16. cts to the center of the 5254C cavity This output signal will be exactly 200 times the nominal 5 MHz ex ternal standard input This output is measured on a 5254C in a second 5245L M or 5248L M with a second 5254C tuned to 95 GHz CALIBRATION OF AN OSCILLATOR The counter will 50 000 000 Hz 950 000 000 Hz display 5254C dial to Frequency measured by 2nd 5245L 5254C 1 000 000 000 Hz Note the resolution is 1 part in 109 for a 1 second measuring time and would be 1 part in 10 for a 10 second measuring time For very high accuracy work you may want to drive the time base of the second counter from a Cesium or Rubidium reference standard This measure ment system is linear so all chart readings are meaningful and fre quency change can be determined by a simple subtraction A simple check of the overall sys tem can be made by driving the EXT STD Input of the first counter with a standard frequency output of the second counter instead of from the unknown standard The second counter should then read 50 000 000 1 Hz or 50 000 000 0 0 1 Hz depending on the measure ment time A difference frequency comparator can also be used to compare fre quency standards This device mul tiplies the difference in frequency between an unknown input and a reference input by decade steps until it is large enough to read on an analog meter or display on an oscilloscope It can be checked as indicated above by fe
17. culator 90030 763 common conversions used in electronics Reflection Terms 16 min A short important rundown on how to use the reflectometer calculator slide rule Directional Coupler Introduction 90030 578 4 min An explanation of the terms used to specify and describe couplers 14 min High Frequency Detectors and Terms 90030 643 Identifies the four categories of high Digital Magnetic Tape Basics 90030 501 frequency detectors 10 min A summary of the applications for digital mag tapes and comparison with other Reflection Terms 90030 636 storage media 20 min The four reflection terms used to describe impedance at high frequencies 15 min Time Domain Reflectometry 90060 450 Basic theory of TDR measurements and Source VSWR 90030 711 major practical considerations using the A comprehensive discussion of Source technique 31 min VSWR at a termination level 10 min High Reliability Component Terms 90030 722 Power Measurements Types of Systems 90030 645 Terminology associated with HI REL Choosing the right method to measure high devices 13 min frequency power 13 min Logic Symbology 90030 489 Transmission Lines 90030 593 Clarification of the majority of HP used An explanation of transmission line terms logic symbols and an explanation of the and functions 14 min functions of the devices themselves 20 min The Smith Chart 90030 642 S Parameter Design Techniques 90060 586
18. eding the same frequency to each input and noting a difference of zero WARM UP CYCLE If the crystal oven of a high stability oscillator is allowed to cool even for a few minutes the temperature gradient may stress the quartz plate enough so it has to go through another warm up cycle Some charts of typical not guaranteed turn on curves on the 5245L oscil lator both for oven hot and oven cold turn on are shown in Figures 5 through 8 The oven on the 5245L is operating whenever the power 4 1024 510 N 5 Zxlo 3 E 5 COUNTER CFF FOR 97 Hous NS f COUNTER OFF FOR 92 Hours gt l 4 TIME IN HOURS gt Dae _ FREQUENCY A F F COUNTER TURNED ON Fig 5 Three Typical Counters at Room Temperature Line Voltage Connected with Counter Switch Off Oven Operating FREQUEN DEVIATION A F F Cee FREQ 0 0 iO 30 UNE VOLTAGE TIME HOURS gt APPLHED Fig 7 Four Typical Counters at Room Temperature Disconnected from Line Voltage for more than 48 hours 41xlo7 4 FREQUENCY DEVIATION A FfF OIG x04 0 20 20 UNE VOLTAGE TIME 10 MWUTES MPPuep Fig 6 Three Typical Counters at Room Temperature Disconnected from Line Voltage for more than 48 hours Gx 4x jo 4 210 9 25102
19. ere to receive a free catalog STATE ZIP listing all H P video tapes E Tem Please y check below the numbers of any desired service notes M 51 1310A 8 5216A 2 5340A 1 8640A 5 8640B 6 8660B 10 136A 2 o 1311A 6 5300A 2 5340A 2 8640A 6 8640B 7 8660B 11 1150A 1 O 1311A 7 O 5300A 1A 5340A 3 leet anlar 8690A 12A D aosA uio D 1911 8 02 53034 1 C 5340A 4 640A 8 8640B 9 464244 1208A H11 3 1402A 9 53604 6 8640A 9 8640B 10 86250A B 1 O 1208A H11 3 5310A 1 7 8640A 10 8640B 11 etes D 11661 3 1300A H82 1 1405A 2 O 5326A B C 6 O 8640A 11 8640B 12 j 1308A 5 1415A 11 5327A B C 4 Cl 8410A 7 8640A 12 86342A 1 O 1308A 6 1420A 6 O 5326A B C Daepsa O 8654A 1 86350 2 1309 4 5 27 5 8805 1 86351 1 1309A 5 86352A 1 2 5326A B C 2 8660A 14 1309A 6 1920A 2 86052 1 n 5327A B C 6 8660B 8 86330A 4 O 1310A 6 O 3330A 3 8620A 2A 86331A 2 D 1310A 7 O 3330B 3 5326A B C 8660B 9 3 5327A B C 7 3459A 11 g Check here if you did not receive a copy of the complete Service Note Index which was published in April 1973 We will send you a copy Would you take a moment to answer a few questions Hewlett Packard is always interested in improving the usefulness of operating and service manuals One area that has attracted some interest is microfiche This is a method
20. ese can easily show a complex mechanical disassembly or adjustment sequence This may prove extremely helpful for the serviceman about to perform that particular task Below is listed the video tapes currently available for HP electronic instruments Video tapes also exist for other disciplines such as medical and systems A free catalog is available which lists all HP tutorial and product related video tapes Check the video tape catalog box on the order form on page 7 183A Oscilloscope Mainframe Adjustments Calibration procedures for 183A B 25 min 1700 Series Service Part 1 Review of controls and assemblies on Model 1700A 14 min 1700 Series Service Part 2 Block diagrams and schematics of DC DC converter power supply and logic controlled trigger circuit 20 min CRT Service and Troubleshooting Review of cathode ray tubes their construction adjustments and trouble shooting techniques 18 min Understanding HP Storage Scopes Theory Theory and operation of mesh storage cathode ray tube plus use of operating modes of storage oscilloscopes 29 min Understanding HP Storage Scopes Service Storage CRTs common failures troubleshooting techniques minor repairs etc 37 min 8064A Spectrum Analyzer Service How to localize problems with the 8064A to the board level to utilize board exchange program 35 min 746A Maintenance 746A High Voltage Amplifier Operational theory and block diagramm
21. ing high voltage danger areas Correct techniques for replacing boards amp tubes 28 min 3490A Multimeter Self Test Troubleshooting Use of self test feature of 3490A Multimeter 22 min Product Option 90030_ 90030_ 90030_ 90030_ 90030_ 90030_ 503 673 674 704 449 359 632 408 705 432A Power Meter Maintenance 90060 Block diagram explanation of 432A followed by maintenance and adjustment procedures 60 min 8410A 8411A Network Analyzer Service 90030 Theory of operation of 8410A 8411A followed by phase lock loop and sampler troubleshooting techniques 23 min 8660 Series Signal Generator Service Part 1 90030 8660A B family block diagram discussion followed by explanation of the function of connectors controls light indicators amp internal assemblies 23 min 5061A Cesium Beam Tube Replacement 90030 Replacement of cesium beam tubes amp alignment 30 min 5360A Computing Counter Maintenance 90030 Troubleshooting procedures for 5360A and Board Exchange Service Kit use 27 min 5500A Replacing the Laser Tube Service 90030 Alignment and calibration of 5500A Laser Interferometer plus proper operation troubleshooting and replacement of the laser tube 24 min 8050A Spectrum Analyzer Maintenance 90030 Do it yourself maintenance of the 8050A 20 min 8064A Spectrum Analyzer Recalibration 90060_ Step by step recalibration of the 8064A
22. ing 1 4 watt in any resistor This problem could be solved by loop equations but a much simpler approach is to recognize that R5 R12 R10 and R14 are in an equi potential plane since the cube could be looked upon as an elaborate balanced bridge Therefore these four resistors can be replaced with an open or short circuit with no change in circuit performance Thus the circuit sim plifies to this Substituting 42 ohms for each of the resistors and simplifying yields this SENEI circuit ALLEL pod ry RO Z fL 420 420 de resistance is 126 21 18 ohms 126 21 The watt rating of the resistors means that any resistor can have a maximum voltage across it of 3 24v since substituting P 0 25 and R 42 yields V 25 42 3 24 But the equivalent circuit shows two resistors in series in several legs therefore the maximum volt age allowed between Points A and B is 6 48v VIDEO TAPES another dimension in education and service Video tapes provide a convenient and efficient way to obtain service training on specific HP products or general techniques The HP Tutorial Series covers technical concepts such as VSWR Logic Troubleshooting or dB and dBm Video tapes are available in a variety of formats A letter suffix is attached to the product number in the space provided This determines the format All tapes are NTSC Ampex format 4 inch Sony EIAJ 1
23. ixed 716 and below Preferred replacement for Q302 1405A DUAL TRACE AMPLIFIER 1405A 2 Serials prefixed 450 and below Preferred replacement for Q404 1415A TIME DOMAIN REFLECTOMETER 1415A 11 Option 014 and Option H08 Time Domain Reflectometer preferred parts replacement 1420 6 Serials prefixed 014 and below Preferred replacement for 0101 1815 TDR SAMPLER 1815A B 4 Serial prefix 1130A and below 1815 Serial prefix 1139A and below Improved 1106A tunnel diode mount reliability 1920A PULSE GENERATOR OUTPUT AMPLIFIER 1920A 2 Serials prefixed 1211A and below Preferred replacement for 2014 015 031 032 SERVICE NOTES 3330A B AUTOMATIC SYNTHESIZER 3330A 3 Serial number 1145A 00112 and below Modification to prevent power supply oscillations 3330B 3 Serial numbers 1305400260 and below Modification to prevent power supply oscillations 34594 DIGITAL VOLTMETER 3459A 11 All serials Replaced the oven controlled power supply 52164 ELECTRONIC COUNTER 5216A 2 Serial prefix 976 and below Solution for A4 decade divider reset problem 53004 FREQUENCY COUNTER 5300A 2 Serial number 1208A02161 and below Modification to prevent thermal runaway 5300A 1A All serials Instructions to measure power line frequency 5303A 500 MHz COUNTER MODULE 5303A 1 Serial prefix 1124A and below Modification to install input overload protection 5310A BATTERY PACK 5310A 1 All serials Precautions for battery replacement
24. ll Road Palo Alto CA 94306 Attn Bench Briefs Subscriptions CUSTOMERS IN EUROPE MAY WRITE TO Hewlett Packard S A 7 rue du Bois du Lan P O Box 85 CH 1217 Meyrin 2 Geneva Switzerland Attn Bench Briefs Subscriptions READER COMMENTS OR TECHNICAL ARTICLE CONTRIBUTIONS ARE WELCOMED PLEASE SEND THEM TO THE ABOVE ADDRESS EDITOR Dick Gasperini HP Palo Alto California STAFF FOR THIS ISSUE CONTRIBUTING AUTHORS Steve Fischer HP Palo Alto California Marv Willrodt HP Santa Clara California HEWLETT PACKARD COMPANY Bulk Rate 195 PAGE MILL ROAD U S Postage PALO ALTO CALIFORNIA 94306 PAID Menlo Park Ca Permit No 317 M SIuHuN 59445 0102 ADDRESS CORRECTION REQUESTED Printed in U S A WWW HPARCHIVE COM
25. or as a percentage Figure 11 shows a typical warm up frequency vs time plot for a 10544A oven oscillator This oscillator which is available as an option in a number of HP products has a fast warm up feature Note that fre quency readings are listed for the first few minutes instead of a plot because of limitations of the mea suring technique used TIME IN MINUTES 4 0 000000 START 9 998 500 MHz OVEN COLD LO min 9 998 880 Miz TURN OW OSCILLATOR 20 999897 MAT FREQ APPROX 1900 Hi LOW 0 9 999 350 Miz WReRUN TW ERROR MEASUREMENT PERCENTAGE 107 FRACTION 1 COUNT TIME BA TO PART ON THIS EXAMPLE trot xay t 00 t ACCURACY ASSUMED 10 FOR 0 00 ix ig t 0 0000 i xo t 0 00001 0 000001 1 iagt Fig 10 Accuracy Chart Marv Willrodt an Applica tions Engineer with the Santa Clara Division of Hewlett Pack ard is currently working on a user s guide for a new electronic WWW HPARCHIVE COM PERIOD MEASUREMENT ti COUNT TIME BASE ACCURACY TRIGGER ERROR 0 3 PERIOD COUNTED FREQUENCY 15 OMNE _lwity HETERODYNE CONVERTERS T Mz iO0MMI OOOMMI IOGHZ MEASURED FREQUENCY frequency counter He began his career with HP in 1951 as a design engineer He was involved with the 524 counters AC 4 decoder 218A digital delay generator and
26. r change for 230 volt operation 8605Z 1 Serial number 1317400230 and below Improved operational amplifiers for A2 and A3 driver assemblies 8620 SERIES SWEEP OSCILLATORS 8620A 2A Serial prefix 1102A and below Modification to reduce residual FM WWW HPARCHIVE COM 9 8640A B AM FM SIGNAL GENERATOR 8640A 5 8640B 6 R640A serial prefix 1245A and below 8640B serial prefix 1246A and below Replacement F Range switch assembly 8640 6 8640 7 Serial prefix 1310A and below Improved AM noise performance 8640A 7 8640B 8 8640A serial prefix 1243A and below 8640B serial prefix 1244A and below AM bandwidth improvement 8640A 8 8640 9 8640A serial prefix 1250A and below 8640 serial prefix 1251A and below Front pane meter replacement 8640A 9 8640B 10 Serial prefix 1301A and below Improvements in AM and pulse circuits 8640A 10 8640B 11 8640A serial prefix 1243A and below 8640B serial prefix 1244A and below Reduction in RFI leakage from front panel 8640A 11 8640B 12 All serials RF On Off switch modification 8640A 12 Serial prefix 1313A and below Recommended A8 mechanical dial replacement 8654A SIGNAL GENERATOR 8654 Serial prefix 1305A and below Output attenuator replacement 86604 SYNTHESIZED SIGNAL GENERATOR 8660A 13 Serials 1246A00350 and below 500 MHz amplifier heatsink 8660A 14 All serials The Indirect Generation service video tape supplement 8660B SYNTHESIZED SIGNAL GENERATOR
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