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Manual Part Number - Artisan Technology Group

1. MEAS VPP 4 Record the measured peak to peak voltage V 1MHz 4 14 Verification Tests Nov 15 1990 Note Bandwidth 80 mV Note Nov 15 1990 5 Set Power Meter controls as follows Calibration Factor to power sensor 1 MHz value Press dB REF to set a 0 dB reference Calibration Factor to power sensor 500 MHz value 6 Set the Signal Generator frequency to 500 MHz then adjust the output level for a power meter reading as close as possible to 0 0 dB REL Record the reading Power Meter 7 Set the HP E1426A controls as follows Time base to 5 TIM RANG 5E 9 Digitize channel I eiut DIG 1 Measure peak to peak voltage MEAS VPP 8 Record the measured peak to peak voltage 500 MHz 9 Calculate the response from the measured results in steps 4 and 8 using the following formula V500MHz response dB 20 10910 200910 dB V1MHz 10 Correct the result in step 9 with any difference in the power meter reading from step 6 using the following formula Observe signs step 9 step 6 dB For example Result from step 9 2 3 dB Power meter reading 0 2 dB REL then true response 2 3 0 2 2 1 dB 11 Verify the result in step 10 is lt 3 0 dB Connect the power splitter to next chan
2. 416 Trigger Sensitivity Test Procedure 417 Oscillator Output Test Procedure csetera Chapter 5 ADJUSTMENTS LA 5 amp 1 Introduction uu 52 Equipment Required eene ertet nette rennes 53 Vertical Calibration Procedure _ 54 Delay Cal Calibration Procedure 55 Time Null Calibration Procedure 56 Logic Trigger Calibration Procedure 57 High Frequency Pulse Response Adjustment Procedure Chapter 6 REPLACEABLE PARTS Ul 6 1 Introduction ANNA NSAN ANNA 62 Ordering Information 63 Exchange Assemblies 64 Abbreviations eene e eee nennen 65 Replaceable Parts List eese eene eerte tnn tette Chapter 7 MANUAL CHANGES 7 1 Introduction sata se rea senten Chapter 8 SERVICE RENE 81 Introduction kasa 82 Safety Considerations 1C eese eee ene eene 83 Equipment Required 84 Troubleshooting 85 General 86 Service Aids 8 7 Visua
3. to earth ground before operating the equipment protects against WARNING Calls attention to procedure electrical shock in case of fault practice or condition that could F hassi 4 cause bodily injury or death rame or chassis groun rh OR dL terminal typically connects to CAUTION Calls attention to procedure the equipment s metal frame practice or condition that could possibly cause damage to Alternating current AC equipment or permanent loss of ta Direct current DC iii HP 75000 Series C Documentation Suggested Sequence for Using the Available Manuals Installation and Getting Started Guide Instrument Applications Using the Mainframe front panel or pacer Mainframe User s Manual Plug in Module User s Manuals Repairing the Mainframe Plug in Module Service Manuals Mainframe Service Manual Manual Descriptions Installation and Getting Started Guide Contains step by step instructions for all aspects of plug in module and mainframe installation This guide also contains introductory programming information and examples HP E1405 Command Module User s Guide Contains programming information for the Control Module operation information for the HP E1400B mainframe and general programming information for instruments installed in the mainframe Plug In Module User s Manuals Contains plug in module programming and configuration information These manuals
4. Service Manual Alas od 11950 ZHN 00S 92713 dH enuen 409 0119 e Buz HP 75000 SERIES C 500 MHz Digitizing Oscilloscope HP E1426A SS ee Service Manual Enclosed is the Service Manual for the HP E1426A 500 MHz Digitizing e Oscilloscope Insert this manual into the binder that came with the HP E1426A User s Manual U HEWLETT PACKARD e Copyright Hewlett Packard Company 1991 1999 Manual Part Number E1426 97003 Printed January 1999 Printed in U S A HP 75000 SERIES C 500 MHz DigitizingOscilloscope HP E1426A KDE ServiceManual e SerialNumbers Attached tothe backplane connector of the instrument isa serial number plate The serial number is in the form 0000A00000 The first four digits and the letter are the serial number prefix The last five digits are the suffix The prefix is the same for identical instruments it changes only when a configuration change is made to the instrument The suffix however is assigned sequentially and is different for each instrument This manual applies directly to instruments with serial numbers prefixed 3028A and above U HEWLETT PACKARD e Copyright Hewlett Packard Company 1991 1999 Manual Part Number E1426 97003 Printed January 1999 Printed in U S A CERTIFICATION Hewlett Packard Company certifies that this product met published specifi
5. 20 OUTPUT 70905 RST Resets the HP E1426A to its default state 30 OUTPUT 70905 SUMM PRES Presets the HP E1426A 40 OUTPUT 70905 TEST TALL Perform test all routine 50 OUTPUT 70905 SUMM QUES TEST Read test event register 60 ENTER 70905 A Enter test event register results 70 PRINT A Print test event register results 80 OUTPUT 70905 RUN Restart the instrument 90 END Terminate program After a test all is performed the RUN command must be executed to restart the instrument 4 8 Operation Verification There are no operation verification procedures for the HP E1426A Use the Performance verification test procedures for post repair check out 4 9 Performance Verification The procedures in this section are used to test the HP E1426A Oscilloscope modules electrical performance using the specifications in Appendix of the HP E1426A User s Manual as the performance standards These tests are suitable for incoming inspection troubleshooting and preventive maintenance All tests can be performed without accessing the interior of the instrument Verification Tests 4 3 4 10 DC Calibrator The DC CALIBRATOR output on the front panel is used for self Test Procedure calibration and probe calibration Though calibrator accuracy is not o specified in the performance specifications it must be within limits in order to provide accurate self calibration 1 Connect the equipment as shown below DC
6. The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by Buyer Buyer supplied products or interfacing unauthorized modification or misuse operation outside of the environmental specifications for the product or improper site preparation or maintenance The design and implementation of any circuit on this product is the sole responsibility of the Buyer HP does not warrant the Buyer s circuitry or malfunctions of HP products that result from the Buyer s circuitry In addition HP does not warrant any damage that occurs as a result of the Buyer s circuit or any defects that result from Buyer supplied products NO OTHER WARRANTY IS EXPRESSED OR IMPLIED HP SPECIFICALLY DISCLAIMS THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE EXCLUSIVE REMEDIES THE REMEDIES PROVIDED HEREIN ARE BUYER S SOLE AND EXCLUSIVE REMEDIES HP SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY NOTICE The information contained in this document is subject to change without notice HEWLETT PACKARD HP MAKES NO WARRANTY OF ANY KIND WITH REGARD TO THIS MATERIAL INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE HP shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing
7. Verification Tests 4 1 4 5 Test Procedures 4 6 Functional Verification 4 2 4 7 Self Test Procedure Note Verification Tests It is assumed that the person performing the verification tests understands how to operate the mainframe HP E1426A and specified test equipment Equipment settings other than those for the HP E1426A are stated in general terms For example a test might require that a voltage of 5 Vdc be measured however the Digital Multimeter instructions as to mode and range would not be specified and the operator would be expected to set that control and other controls as required to obtain a measurement It is also assumed that the technician will select the cables adapters and probes required to complete the test setups illustrated in this section The procedures in this section are used to quickly verify that the HP 1426 functions are working These tests should be performed anytime the user wants to verify that the HP 1426 is connected properly and is responding to basic commands All tests can be performed without accessing the interior of the instrument The purpose of this test is to verify the HP E1426A is communicating with the command module external controller and or external terminal by performing a self test If necessary refer to the HP E1405 Command Module User s Manual or applicable command module manual for information on address selection and external cabling guideli
8. CALIBRATION OUTPUT MULTIMETER coca OO DOO Acd 97 cc COMMAND OSCILLOSCOPE MODULE MODULE Figure 4 1 DC Callbrator Test Set up 2 Setthe HP 1426 controls as follows o Reset HP E1426A RST DC Calibrator Output to 0 V CAL SCAL DOUT ZVOL 3 Verify the Multimeter reads close to 0 000 V Record the reading to four decimal places 1 4 the HP E1426A Calibrator Output to 5 V CAL SCAL DOUT FVOL 5 Verify the Multimeter reads close to 5 000 V Record the reading to four decimal places V2 6 Subtract V1 from V2 The difference should be between 4 990 and 5 010 V Note If the difference is not within the limits repair is necessary See troubleshooting in Chapter 8 7 Disconnect test equipment 4 4 Verification Tests Example This program will automatically perform a DC Calibrator test The program will pause to allow the user to get the reading from the multimeter The example is written using e HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A e COMPatible programming language HP Series 200 300 Computer with HP BASIC Execute 10 OUTPUT 70905 CLS 20 OUTPUT 70905 RST 30 OUTPUT 70905 CAL SCAL DOUT ZVOL 40 PAUSE 50 OUTPUT 70905 CAL SCAL DOUT FVOL 60 PAUSE 70 END Verification Tests 4 5 4 11 4 6
9. HP P N E1426 69502 General information 1 1 TERONT ACQUISTION PCA PANEL INPUT 1 Figure 1 2 1 2 General Information The Acquisition PCA attenuates amplifies each of the four inputs The conditioned input signal is then routed to a track and hold circuit The signal is then multiplexed to an A D Converter where it is changed into a digital word This digital information is stored for use by the CPU PCA A replica of the conditioned input signal is also used for triggering Additional functions include Time base circuit provides the timing signals necessary for data acquisition calibrator circuit provides signals for probe compensation trigger event and calibration calibrator circuit provides a calibration signal The CPU contains the control and interface circuits necessary to direct oscilloscope operations Control information COMP or SCPI is received from the mainframe controller and the necessary instructions are sent to the Acquisition to perform the specific task When the digital waveform information is received from the Acquisition PCA all the user requested parameters are measured and routed to the mainframe Additional functions include TTL and ECL trigger signals from the mainframe are routed to the Acquisition PCA to perform external trigger functions TTL and ECL trigger signals from the oscilloscope are routed to the mainframe over the backplane trigger
10. and secondary address of 05 for the HP E1426A e COMPatible programming language HP Series 200 300 Computer with HP BASIC OPTION BASE 1 DIM Range 3 Offset 3 Power supply 3 RESTORE READ Range Offset Power supply OUTPUT 70905 CLS OUTPUT 70905 RST FOR Channel 1 TO 4 OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT 70905 AUT 70905 RUN 70905 BLAN CHAN1 CHAN2 CHAN3 CHAN4 70905 VIEW CHAN amp VALS Channel 70905 CHAN amp VALS Channel amp COUP DC 70905 ACQ TYP AVER 70905 ACQ COUN 32 PRINT Connect the power supply to scope channel amp VALS Channel FOR Measurement 1 TO 3 PRINT Set the power supply to amp VALS Power supply Measurement s volts PAUSE OUTPUT 70905 CHAN amp VALS Channel amp RANG amp VALS Range Measurement OUTPUT 70905 CHAN amp VALS Channel amp OFFS amp VALS Offset Measurement OUTPUT 70905 MEAS SOUR CHAN amp VALS Channel OUTPUT 70905 DIG CHAN amp VALS Channel OUTPUT 70905 MEAS VAV ENTER 70905 Voltage val PRINT Result amp VAL Voltage val NEXT Measurement NEXT Channel OUTPUT 70905 RST DATA 4 1 6 800E 3 values for each measurement DATA 20 9 5 Offset values for each measurement DATA 20 9 5 Power supply values for each measurement END Verification Tests 4 13 4 14 Bandwidth This test checks the repetitive and real time bandwidths of the HP Test Procedure 14
11. e 3 2 Operating instructions 3 5 Cleaning Procedures Caution Caution CONTACTS Wa FRONT VIEW ASSEMBLED The following items should be cleaned at 12 month intervals and more often if located in very dusty or humid areas Do not use a vacuum cleaner to remove dust from the Al CPU PCA or the A2 Acquisition PCA These assemblies have static sensitive devices that can be damaged by a vacuum cleaner 1 Remove the Al CPU PCA and the A2 Acquisition PCA See Chapter 8 for instructions The Al CPU PCA and the A2 Acquisition PCA contain static sensitive devices that can be damaged when handling Use static control devices wrist straps static mats etc when handling these assemblies CONTACTS LN CONTACTS TOP VIEW SHIELD REMOVED Operating Instructions 3 3 2 Using a soft bristle brush only remove dust from the printed circuit surface 3 Clean the backplane connector contacts the front panel BNC connectors and any other contacts on both assemblies Clean all interconnecting cable contacts 4 Reassemble the A1 CPU and the A2 Acquisition See Chapter 8 for instructions 5 Clean the Oscilloscope panel and shield 3 6 Operation Complete instructions for operation of the Oscilloscope are provided in the HP E1426A User s Manual Information includes e Getting Started e Configuring the Oscilloscope e Using the Oscilloscope with COMPatible or SCPI Oscilloscope Comma
12. initial inspection prepare for use and storing and shipping instructions Chapter 3 Operating Instructions contains information and procedures required to operate the oscilloscope perform scheduled preventive maintenance and perform the operator s check Chapter 4 Verification Tests contains information and procedures required to test the oscilloscope Three levels are provided for functional verification operation verification and performance verification Chapter 5 Adjustments contains information and procedures required to readjust the oscilloscope to within its rated specifications Chapter 6 Replaceable Parts lists the part numbers for all user replaceable parts in the oscilloscope Also provides information on ordering spare parts and module assembly exchange Chapter 7 Manual Changes contains information required to adapt this manual to instruments whose serial numbers are lower than those listed on the title page Chapter 8 Service contains information and procedures to aid in fault isolation and repair of the oscilloscope Appendix References contains a list of all reference documentation required when servicing the oscilloscope Contents Chapter 1 GENERAL INFORMATION 11 Introduction paa sasasunasaanasasaa sasa sasa nasan serate atenta 12 Specifications Considerations 13 Safety Considerations 14
13. 6 4 Code List of Manufacturers ANY SATISFACTORY SUPPLIER HEWLETT PACKARD COMPANY CORPORATE HEADQUARTERS Zip Code PALO ALTO 6 8 Replaceable Parts 7 Manual Changes 7 1 Introduction This section normally contains information for adapting this manual to instruments for which the content does not apply directly Since this manual does apply directly to instruments having serial numbers listed on the title page no change information is given here Refer to INSTRUMENTS COVERED BY THIS MANUAL in Chapter 1 for additional important information about serial number coverage Manual Changes 7 1 8 Service 8 1 Introduction 8 2 Safety Considerations Warning This chapter contains information for servicing the HP E1426A Oscilloscope Included are procedures for troubleshooting repair disassembly and re assembly This paragraph contains information cautions and warnings which must be followed for your protection and to avoid damage to the equipment when repairing the Oscilloscope Any interruption of the protective grounding conductor inside or outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor outlet is not sufficient protection In addition verify that a common ground exists between the unit under test and this instrument prior to energizing either unit Wheneve
14. Manual Updates nennen nenne GNG h enhance ette testet than senta 15 Description sen tene nested e nues nentes nun 16 Instruments Covered by This Manual 17 Options esee eee eene eate eene KA o tasses tese ns eene 1 8 Accessories Supplied 19 Equipment Available 110 Recommended Test Equipment Chapter 2 AYAN NAA 21 esee eene nennen nenne DONA 22 Initial Inspection ehe seen enne tna GG seat aine enne 23 Preparation for Use enne sttnte nent 24 Operating Environment 25 Storage and Shipment hte 26 Environment ea senno t senem hh nhanh sente nnn a nennen nna 27 Packaging esee eene Chapter 3 OPERATING INSTRUCTIONS 3 1 Introduction AA 32 Safety Considerations 33 Preventive Maintenance 34 Required Equipment 35 Cleaning Procedures sess annee 36 Operation
15. Measure time of 1st positive edge at 0 V MEAS TVOL 0 41 Record the measured time that 1st positive edge occurred at 0 V T3 Set the HP 1426 controls as follows Time base delay to 500 psec TIM DEL 5E 4 Digitize channel 1 DIG 1 Measure time of 1st positive edge at 0 V MEAS TVOL 0 1 Record the measured time that 1st positive edge occurred at 0 V T4 Subtract T3 from T4 The difference should be between 499 9709 psec and 500 0291 usec Disconnect test equipment Verification Tests 4 19 Execute 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 4 20 OPTION Example This program will automatically prompt the user through the steps required to perform a time accuracy test and print out the results of each measurement The example is written using an HF IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A e COMPatible programming language HP Series 200 300 Computer with HP BASIC BASE 1 DIM Delay 4 RESTORE READ Delay OUTPUT OUTPUT PRINT Connect the signal generator to scope channel 1 PRINT Set the signal generator to 500 MHz and 150 mV rms PAUSE OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPU
16. accordingly This product was tested in a typical configuration with Hewlett Packard test systems etd Ken Wyatt Product Regulations Manager European Contact Your local Hewlett Packard Sales and Service Office or Hewlett Packard GmbH Department ZQ Standards Europe Herrenberger Strasse 130 D 71034 Boeblingen Germany FAX 49 7031 14 3143 Colorado Springs 11 17 98 EMC DOC doc Rev Date 10 27 98 PrintingHistory The Printing History shown below lists all Editions and Updates of this manual and the printing date s The first printing of the manual is Edition 1 The Edition number increments by 1 whenever the manual is revised Updates which are issu between Editions contain replacement pages to correct the current Edition of the manual Updates are numbered sequentially starting with Update 1 When a new Edition is created it contains all the Update information for the previous Edition Each new Edition or Update also includes a revised copy of this printing history page Many product updates or revisions do not require manual changes and conversely manual corrections may be done without accompanying product changes Therefore do not expect a one to one correspondence between product updates and manual updates Edition 1 Part Number 1426 90902 July 1990 Edition 1 Part Number E1426 90902 November 1990 Edition 1 Part Number E1426 90902 February 1991 Edition 1 Part Number E1426 97003 January 1999 Safety
17. at 500 MHz lt 3 0 dB 80 mV Full Scale Range at 500 MHz lt 3 5 dB CHAN 2 280 mV Full Scale Range at 500 MHz lt 3 0 dB 80 mV Full Scale Range at 500 MHz lt 3 5 dB CHAN 3 280 mV Full Scale Range at 500 MHz lt 3 0 dB 80 mV Full Scale Range at 500 MHz lt 3 5 dB CHAN 4 280 mV Full Scale Range at 500 MHz lt 3 0 dB 80 mV Full Scale Range at 500 MHz lt 3 5 dB Time Measurement Accuracy Test 8 nsec 7 890 ns 128 nsec 127 884 ns 400 nsec 399 870 ns 800 nsec 799 850 ns 4 28 Verification Tests 8 110 ns 128 116 ns 400 130 ns 800 150 ns Table 4 1 Verification Test Record Continued Test Results Actual PERFORMANCE VERIFICATION Continued Trigger Sensitivity Test Para No CHAN 1 1 6 V Range at 100 MHz Triggered LED ON 1 6 V Range at 500 MHz Triggered LED ON 10 mV Range at 500 MHz Triggered LED ON 10 mV Range at 100 MHz CHAN 2 Triggered LED ON 1 6 V Range at 100 MHz Triggered LED ON 1 6 V Range at 500 MHz Triggered LED ON 10 mV Range at 500 MHz Triggered LED ON 10 mV Range at 100 MHz CHAN 3 Triggered LED ON 1 6 V Range at 100 MHz Triggered LED ON 1 6 V Range at 500 MHz Triggered LED ON 10 mV Range at 500 MHz Triggered LED ON 10 mV Range at 100 MHz Triggered LED ON CHAN 4 1 6 V Range at 100 MHz Triggered LED ON 1 6 V Range at 500 MHz
18. calibration event register Enter calibration event register results Print calibration event register results Terminate if results not 0 Selects logic trigger calibration routine 90 OUTPUT 70905 CAL SCAL BCAL Starts logic trigger calibration routine 100 OUTPUT 70905 SUMM QUES CAL Read calibration event register 110 ENTER 70905 E Enter calibration event register results 120 PRINT E Print calibration event register results 130 END Terminate program Adjustments 5 9 5 7 High Frequency Pulse Response Adjustment Procedure 5 10 Note Adjustments High Frequency Pulse Response adjustment is performed by adjusting the overshoot of the input signal to 3 40 596 VBASe and are measured then is measured and overshoot is calculated as a percentage of amplitude Pulse response characteristics are such that a secondary peak ringing can possibly give incorrect overshoot readings By delay ing the ringing a valid overshoot measurement can be performed This adjustment is performed ONLY when a vertical attenuator AT1 4 has been replaced or if the Bandwidth test fails complete firmware calibration paragraphs 5 3 through 5 6 MUST be completed prior to this adjustment If this procedure is not performed set the CAL FACTOR PROTECT switch to PROTECTED 1 Verify the CAL FACTOR PROTECT switch is set to UNPROTECTED Locate the resistor on the channel that is being adjusted and set it to m
19. contain examples for the most used module functions and a complete SCPI command reference for the plug in module HP E1400B Mainframe Service Manual Contains service information for the mainframe This manual contains information for ordering replaceable parts and exchanging assemblies Also contains information and procedures for performance verification adjustment preventive maintenance troubleshooting and repair Plug In Module Service Manuals Contains plug in module service information These manuals contain information for exchanging the module or ordering replaceable parts Dependent on the module information and procedures for performance verification adjustment preventive maintenance troubleshooting and repair are also provided How to Use this Manual Manual Overview Manual Content This manual shows how to service the HP E1426A 500 MHz Digitizing Oscilloscope Oscilloscope operation installation and configuration information is not discussed in this manual Refer to the HP 75000 Series C HP E1426A User s Manual for installation configuration and operating information This manual has eight chapters and one appendix Chapter 1 General Information provides a basic description and lists available options and accessories Also lists the tools and test equipment required for service Chapter 2 Installation contains information and procedures required to install the oscilloscope into the mainframe perform
20. degradation of a parameter to catastrophic failures MOS CMOS and other static sensitive devices are used in this instrument They are prone to damage from both static electricity and transient signals They must be handled carefully When working on the Oscilloscope assemblies keep in mind the following recommendations to avoid damaging these sensitive components 1 Use static free work station with pad of conductive rubber or similar material 2 After removing assemblies from the Oscilloscope be sure that they are placed on a conductive surface to guard against ESD damage Do not stack boards 3 When removing a MOS or CMOS device from a high grip socket be careful not to damage it Avoid removing devices from these sockets with pliers Instead use small screwdriver to pry the device up from one end slowly pulling it up one pair of pins at a time 4 Once a MOS or CMOS device has been removed from an assembly immediately stick it into a pad of conductive foam or other suitable holding medium 8 10 Service 5 When replacing a MOS or CMOS device ground the foam on which it resides to the instrument before removing it If a device requires soldering make sure that the assembly is lying on a pad of conductive material and that the pad soldering iron tip and personnel are grounded to the assembly Apply as little heat as possible 6 Before turning the instrument off remove any large ac sources that may be
21. e meeting all published specifications Performance Verification To consider the tests valid the following conditions must be met The HP E1426A must have a 30 minute warm up The line voltage must be 115 230 Vac t105 For greatest accuracy the temperature of the test area should be between 18 and 28 C and should be stable to within 1 C Equipment required for the verification tests is listed in Table 1 1 Recommended Test Equipment Any equipment that satisfies the critical specifications given in the table may be substituted Results of the verification tests may be tabulated in Table 4 1 Verification Test Record The Verification Test Record lists all of the verification test specifications and the acceptable limits for each specification If verification test results are recorded during an incoming inspection of the instrument they can be used for comparison during periodic maintenance or troubleshooting The test results may also prove useful in verifying operation after repairs are made This instrument requires periodic verification of performance to ensure that it is operating within specified tolerances The performance verification tests described in this section should be performed at least once every six months or 1 000 hours under conditions of heavy usage or severe operating environments the tests should be more frequent Annual cleaning procedures are detailed in Chapter 3 Preventive Maintenance
22. for querying test results in the individual registers Test Failure Probable Cause Action Display RAM Not Applicable System RAM A1 CPU PCA malfunction Return for exchange Non volatile RAM At CPU PCA malfunction Return for exchange Acquisition RAM Suspect A2 Acquisition PCA malfunction Check A2 first Return malfunctioning PCA for exchange Logic Trigger A2 Acquisition PCA malfunction Return for exchange Analog Trigger A2 Acquisition PCA malfunction Return for exchange Time Base A2 Acquisition PCA malfunction Return for exchange D A Converter A2 Acquisition PCA malfunction Return for exchange A D Converter A2 Acquisition malfunction Return for exchange 8 4 Service 4 Disconnect power and remove Oscilloscope from the mainframe Separate the A1 and A2 PCA s see information in this chapter Use the following information to isolate the problem to a user replaceable part Step Description Probable Cause Action Power Supplies Check A1F1 through A1F6 Check A1P1 P2 Signal Connection Check all connectors Check all contacts Check all cables Visual Inspection Improper Operation 1 Inspect see next page Verify connection Verify proper operation 5 If malfunction cannot be isolated to a user replaceable component return the Oscilloscope to Hewlett Packard for repair Service 8 5 8 9 Repair and Replacement 8 10 Disassembly Procedures are provide
23. improper cabling or improper selection of the interface select code primary address setting and or secondary address setting Verify proper connection and address selection using the applicable command module and mainframe manuals before troubleshooting Example For the example use an HP IB select code of 7 primary address of 09 and secondary address of 05 for the Oscilloscope e COMPatible programming language an HP Series 200 300 Computer with HP BASIC e 10 OUTPUT 70905 CLS Clear status 20 OUTPUT 70905 RST Resets the Oscilloscope to its default state 30 OUTPUT 70905 SUMM PRES Presets the Oscilloscope 40 OUTPUT 70905 TEST TALL Perform all test routines 50 OUTPUT 70905 SUMM QUES TEST Read test event register 60 ENTER 70905 A Enter test event register results 70 PRINT A Print test event register results 80 OUTPUT 70905 RUN Restart the instrument 90 END Terminate program Note After a self test is performed the RUN command must be executed to restart the instrument Nov 15 1990 Operating instructions 3 5 4 1 Introduction Note 4 2 Equipment Required 4 3 Test Record 4 4 Calibration Cycle 4 Verification Tests Three levels of test procedures are provided in this chapter and are used to verify that the HP E1426A Oscilloscope is e fully functional Functional Verification meeting critical specifications after repair Operation Verification or
24. into this product have been impaired either through physical damage exceasive moisture or any other reason REMOVE POWER and do not use the product until safe operation can be verified by service trained personnel If necessary return the product to a Hewlett Packard Sales and Service Office for service and repair to ensure that safety features are maintained DO NOT service or adjust alone Do not attempt internal service or adjustment unless another person capable of rendering first aid and resuscitation is present DO NOT substitute parts or modify equipment Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification to the product Return the product to a Hewlett Packard Sales and Service Office for service and repair to ensure that safety features are maintained Safety Symbols LINE AC line voltage input receptacle h Indicates hazardous voltages Instruction manual symbol Affixed to product containing affixed to product Indicates static sensitive devices use that the user must refer to the AA antistatic handling procedures to manual for specific Warning or Marc Sanane prevent electrostatic discharge Caution information to avoid damage to components personal injury or damage to the product NOTE Calls attention to a procedure practice or condition that L Indicates the field wiring requires special attention by the OR terminal that must be connected reader
25. oval head operational amplifier option oscillator peak used in parts list pulseamplitude modulation eee printed circuit pulse code modula tion pulse count modulation s e pulseduration modulation picofarad phosphor bronze Phillips positive intrinsic negative peak inverse voltage peak oscillator phase modulation positive negative positive part of polystyrene porcelain positive position s used in parts list position potentiometer peak to peak peak to peak used in parts list pulse position modulation PREAMPL preamplifier pulse repetition frequency pulse repetition rate picosecond point pulse time modulation pulse width modulation NOTE peak working voltage resistance capacitance rectifier reference regulated replaceable e o radio frequency radio frequency interference round head right hand resistance inductance capacitance rack mount only root mean square round read only memory rack and panel reverse working voltage Scattering parameter second time second plane angle slow blow fuse used in parts list silicon controlled rectifier screw selenium semicon ductor superhigh frequency silicon Silver slide signal to noise ratio e Bingle pole double throw spring split ring single pole single throw single sideband
26. supply values for each measurement DATA 35 14 7 3 5 1 4 700E 3 350E 3 140E 3 70E 3 35E 3 14E 3 7E 3 END Verification Tests February 9 1991 4 13 Offset Accuracy This test verifies offset accuracy e Test Procedure 1 Connect the equipment as shown below Use a banana to BNC adapter to connect the BNC cable to the power supply Set the power Supply for 20 V output POWER SUPPLY BNC TO DUAL COMMAND OSCILLOSCOPE BANANA ADAPTER MODULE MODULE Figure 4 4 Offset Accuracy Test Set up e 2 Setthe HP 1426 controls as follows Reset HP E1426A 5 RST Time base to automatic TIM MOD AUT Start data acquisition RUN Turn on channel 1 VIEW 1 Turn off unused channels BLAN CHAN2 CHAN3 CHAN4 Channel 1 to DC at IMQ CHANI COUP DC Acquisition type to average ACQ TYP AVER Acquisition count to 32 ACQ COUN 32 Channel 1 range to 4 1 4 Channel 1 offset to 20 V CHANI1 OFFS 20 Measure channel 1 MEAS SOUR CHAN1 Digitize channel 1 DIG 1 Measure average voltage MEAS VAV 3 Verify that average voltage as measured by the HP 1426 is betwe
27. that the BNC cable is not longer than 1 meter PROTECTED UNPROTECTED TOP VIEW Figure 5 2 Example Delay Cailbration Setup Perform clear status reset then preset the Oscilloscope Select and start the delay calibration routine During calibration the access and error LED s will be on 5 4 Adjustments February 9 1991 Note Example If the calibration time exceeds 1 minute the calibration is invalid Recycle power then repeat procedure If the condition repeats the instrument is malfunctioning Refer to the Service Manual for information on correcting the malfunction before proceeding 5 After calibration is complete LED s to off read the calibration event register to verify that no errors were generated during the procedure e If 0 is returned the calibration was successful e If 0 is not returned the calibration attempt was unsuccessful See Chapter 4 CALibrate Subsystem for more information 6 Disconnect cable from input 1 and reconnect to input 2 Repeat steps 4 and 5 for input 2 7 Disconnect cable from input 2 and reconnect to input 3 Repeat steps 4 and 5 for input 3 8 Disconnect cable from input 3 and reconnect to input 4 Repeat steps 4 and 5 for input 4 9 When complete disconnect BNC cable and perform Time Null Calibration Procedure The following example shows how to perform a delay calibration The example is written using an HP IB select code of 7 primary addres
28. with step 5 February 9 1991 R504 AT4 R503 AT2 R502 501 Figure 5 5 February 9 1991 FAST RISE PULSE GENERATOR TO CHANNEL BEING ADJUSTED UNPROTECTED TOP VIEW High Frequency Pulse Response Adjustment Setup 5 Set the Oscilloscope controls on the channel being adjusted as follows Time Base Range to 5 nsec TIM RANG 5 9 Time Base Delay to 1 4 nsec TIM DEL 1 4 9 Digitize the channel being adjusted DIG CHAN n Measure VMAX MEAS SOUR CHAN n VMAX Verify measured result is 5100 e If VMAX measured result is 5100 an invalid measurement has occurred Find the cause and correct before continuing e If correct proceed with step 6 Calculate overshoot VMAX VTOP VTOP VBASe 100 Verify calculated overshoot results are 396 0 5 If correct proceed with step 7 f incorrect adjust the applicable resistor A2R501 through R504 depending on the channel being adjusted and repeat the procedure Disconnect test equipment and set the CAL FACTOR PROTECT switch to PROTECTED Adjustments 5 11 Example The following example shows how to perform a High Frequency Pulse Response Adjustment procedure The example is written using an HP IB select code of 7 primary address of 09 and secondary address of 05 for Scope COMPatible programming language an HP Series 20
29. 0 300 Computer with HP BASIC l Execute 10 Address 70905 20 Channel 1 30 Retry 40 PRINT Connect the pulse generator to channel amp VAL Channel amp on the oscilloscope 50 PRINT Press the return key when ready 60 INPUT 70 80 Retryl 90 CLEAR Address 100 OUTPUT Address RST 110 WAIT 2 120 OUTPUT Address CHANNEL 6VALS Channel 6 COUPLING DCF 130 OUTPUT Address AUTOSCALE 140 WAIT 10 150 OUTPUT Address CHANNEL amp VALS Channel amp RANGE 800E 3 OFFSET 160 OUTPUT Address TIMEBASE RANGE 20E 9 DEL 1 5E 9 170 OUTPUT Address DIG CHAN amp VALS Channel 180 WAIT S 190 200 OUTPUT Address MEASURE VBASE 210 ENTER Address Vbase 220 PRINT VBASE amp VALS Vbase 230 IF Vbase 100 THEN GOTO Meas error 240 250 OUTPUT Address MEASURE VTOP 260 ENTER Address Vtop 270 PRINT amp VALS Vtop 280 Vtop 100 THEN Meas error 290 300 OUTPUT Address TIMEBASE RANGE SE 9 DELAY 1 4E 9 310 OUTPUT Address DIG CHAN amp VALS Channel 320 WAIT 5 330 340 OUTPUT Address MEASURE VMAX 350 ENTER Address Vmax 360 PRINT VMAX amp VALS Vmax 370 IF Vmax gt 100 THEN GOTO Meas error 380 390 Overshoot Vmax Vtop Vtop Vbase 100 400 IF Overshoot 3 5 OR Overshoot 2 5 THEN 410 PRINT Overshoot amp VALS Overshoot amp amp 420 PRINT Overshoot out of the specified range 430 INPUT AS 440 GOTO Retry
30. 15 0430 Screw Pan Head M3 0X 5 Torx T10 Order by Description 0515 1031 Screw Flat Head M3 0X 5 Torx T10 Order by Description 0380 3025 Stand off 1 4X19mm M3 0X 5 Order by Description 0380 3026 Stand off 1 4X29mm M3 0X 5 Order by Description 54503 25701 Nut Hex Single Chamfer 5 8 32 THD Order by Description See introduction to this section for ordering information indicates factory selected value t Backdating information in section VII Replaceable Parts 6 5 S19V1NOO HO193NNOO HINOL LON OQ wang pamu Ag SININIYINO3H MIMOd QT Nl SS3dH00Y 73901 94 Nai O usao mow IOM insu OU Og senbiuuoe bugpusy 3ALISN3S NAVIS NOUNVI V Aum peg de seuf eu od eus eu se s 3euuoo gr patay mupep 960 BANG NINANG porog oles vap eppow upows so Buking 777 prey pus nuswnsa o amod yo MAKA 3331 5 OMNHYM 3 dH 3dO0990TW2980 THIN 005 9 831436 00094 dH OO OLZE PSOE A v3uv A4NvYAU3S Figure 6 1 Oscilloscope Replaceable Parts e 6 6 Replaceable Parts e Figure 6 2 A1 CPU PCA Replaceable Parts nm e ooo 2 9 095 SE e Figure 6 3 A2 Acquisition PCA Replaceable Parts Replaceable Parts 6 7 Table
31. 26 1 Connect the equipment as shown below Use a type N cable to connect the signal generator to the power splitter input Connect the power sensor to one output of the power splitter Use an N to BNC adapter to connect the other power splitter output to the HP E1426A channel 1 input INPUT 1 POWER METER COMMAND OSCILLOSCOPE MODULE MODULE DIRECT CONNECTION USING POWER POWER ADAPTER SPLITTER SENSER Figure 4 5 Bandwidth Test Set up Bandwidth 280 mV 2 Set the Signal Generator controls as follows Frequency ce ka oe e aae e 1MHz oii CER 2 4 dBm Note Setting the output to 2 4 dBm will produce a 8 4 dBm level at the HP 1426A 502 input loss occurs through the power splitter 3 Set the HP 1426 controls as follows Reset E1426A UNG NA appe RST Time base to 2 ccce TIM RANG 2E 6 Turn on channel 1 VIEW 1 Turn off unused channels BLAN CHAN2 CHAN3 CHAN4 Channel 1 to DC at 500 CHAN1 COUP DCF Trigger source to channel 1 TRIG SOUR CHAN1 Acquisition type to average ACQ TYP AVER Acquisition count to 32 ACQ COUN 32 Channel 1 range to 40 mV CHANI RANG 3 2 1 Measure channel 1 MEAS SOUR 1 Digitize channel Lina DIG 1 Measure peak to peak voltage
32. 4 7 mV 7 0 mV 6 3 mV to 7 7 mV For 40 mV to 8 mV ranges it is necessary to disconnect the multimeter after ifying the output of the supply to avoid coupling noise into the channel 7 Repeat steps 2 through 6 for channels 2 3 and 4 When repeating the procedure all references to channel 1 should be changed to the channel being tested Turn off all unused channels using the BLANk command Voltage measurement errors can be caused by the need for self calibration Perform vertical calibration see Adjustment procedures Chapter 5 before troubleshooting instrument If self calibration fails to correct problem the cause may be the attenuator or A2 PCA See troubleshooting in Chapter 8 8 Disconnect test equipment Verification Tests 4 9 Execute 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 4 10 Example This program will automatically prompt the user through the steps required to perform a voltage accuracy test and print out the results of each measurement The data at the end of the program corresponds to the values for range offset and supply voltage in each measurement The example is written using HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A e COMPatible programming language HP Series 200 300 C
33. 4 Input testing loop 50 OUTPUT 70905 CAL SCAL TNUL CH1TO amp VALS 1 Selects channel 1 to n time null calibration routine n input 2 4 OUTPUT 70905 CAL SCAL BCAL Starts time null calibration routine OUTPUT 70905 SUMM QUES CAL Read calibration event register ENTER 70905 C Enter calibration event register results PRINT C Print calibration event register results PAUSE Pause to connect next input NEXT I Repeat for inputs 3 4 END Terminate program Adiustments 5 7 5 6 Logic Trigger Logic trigger calibration is performed on channel one using the Calibration Procedure following procedure e 1 Verify the CAL FACTOR PROTECT switch is set to UNPROTECTED 2 Connect the Oscilloscope AC Calibrator Output connector to the Input 1 connector using a BNC cable Note Verify that the BNC cable is not longer than 1 meter UNPROTECTED ADJUST Flgure 5 4 Example Loglc Trigger Calibration Setup 3 Read the calibration register to verify that no errors are present e f 0 is returned proceed with step 5 If 0 is not returned the Logic Trigger calibration must be terminated and the cause of the error corrected See Chapter 4 CALibrate Subsystem for more information 4 Perform clear status reset then preset the Oscilloscope 5 8 Adjustments February 9 1991 Example 5 Locate the logic trigger adjustment on the right side of the Oscilloscope module and the error and acces
34. 60 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 Example This program will automatically prompt the user through the steps required to perform a trigger sensitivity test The example is written using OUTPUT 70905 CLS OUTPUT 70905 RST FOR Channel 1 TO 4 an HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A COMPatible programming language an HP Series 200 300 Computer with HP BASIC PRINT Connect the signal generator to scope channel amp VALS Channel PAUSE PRINT Set the signal generator to 100 MHz and PAUSE OUTPUT 70905 TIM RANG 20E 9 OUTPUT 70905 BLAN CHANI1 CHAN2 CHAN3 CHAN4 OUTPUT 70905 VIEW CHAN amp VALS Channel OUTPUT 70905 CHAN amp VALS Channel amp COUP DCF OUTPUT 70905 CHAN amp VALS Channel amp RANG 1 6 OUTPUT 70905 ACQ TYP AVER OUTPUT 70905 ACO COUN 16 OUTPUT 70905 TRIG SOUR CHAN amp VALS Channel OUTPUT 70905 TRIG LEV O OUTPUT 70905 RUN PRINT Triggered PAUSE PRINT Set the signal generator to 500 MHz and PAUSE OUTPUT 70905 TIM RANG 1 7 OUTPUT 70905 RUN PRINT Triggered PAUSE PRINT Set the signal generator to 500 MHz and PAUSE OUTPUT 70905 CHAN amp VALS Channel amp RANG 1 2 OUTPUT 70905 CHAN amp VALS Channel amp OFFS 0 OUTPUT 70905 RUN PRINT Triggered PAUSE PRINT Set the signal generator to 100 MHz
35. A RUN On HP E1426A front panel verify TRIGGERED LED is ON Set the Signal Generator controls as follows FY QUue ny M 500 MHz Outputs 7 5 mV rms Set the HP 1426 controls as follows Channel 1 range to 10 mV 1 1E 2 Channel 1 offset to 0 V CHAN1 0FFS 0 Start HP E1426A running nennen nnn nn RUN On the HP 1426 front panel verify TRIGGERED LED is Set the Signal Generator controls as follows Frequeney AM 100 MHz Outp t IN NGA ATA ANAKAN 3 12 mV rms Set the HP E1426A controls as follows Time base to 500 TIM RANG 5E 8 Start E1426A running eere eene RUN On the HP 1426 front panel verify TRIGGERED LED is ON Connect the signal generator output to the next channel being tested Repeat steps 2 through 14 for channels 2 3 and 4 When repeating the procedure all references to channel 1 should be changed to the channel being tested Turn off all unused channels using the BLANk command Trigger errors can be caused by the attenuator or A2 PCA See troubleshooting in Chapter 8 15 Disconnect test equipment February 9 1991 Execute 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 1
36. Errata Title amp Document Type E1426A Service Manual Manual Part Number E1426 97003 Revision Date January 1999 HP References in this Manual This manual may contain references to HP or Hewlett Packard Please note that Hewlett Packard s former test and measurement semiconductor products and chemical analysis businesses are now part of Agilent Technologies We have made no changes to this manual copy The HP XXXX referred to in this document is now the Agilent XXXX For example model number HP8648A is now model number Agilent 8648A About this Manual We ve added this manual to the Agilent website in an effort to help you support your product This manual provides the best information we could find It may be incomplete or contain dated information and the scan quality may not be ideal If we find a better copy in the future we will add it to the Agilent website Support for Your Product Agilent no longer sells or supports this product You will find any other available product information on the Agilent Test amp Measurement website www tm agilent com Search for the model number of this product and the resulting product page will guide you to any available information Our service centers may be able to perform calibration if no repair parts are needed but no other support from Agilent is available cid Agilent Technologies HEWLETT PACKARD e _ HP 75000 SERIES 500 MHz Digitizing Oscilloscope HP E1426A HI
37. Input Resistance Test Procedure Notes Verification Tests This test checks the input resistance of the vertical inputs A four wire measurement is used for accuracy at 50 02 1 Connect the equipment as shown below Use the BNC to banana adapters to connect one of each BNC cable to the four wire resistance connections on the multimeter and connect the free ends of the cables to a BNC tee Connect the male end of the BNC tee to the HP E1426A channel 1 input BNC TEE BNC CABLE BNC TO DUAL BANANA ADAPTERS LO BNCCABLE COMMAND OSCILLOSCOPE MODULE MODULE Figure 4 2 Input Resistance Test Set up 2 Set the E1426A controls as follows Reset HP E1426A RST Channel 1 DC MQ CHAN1 COUP DC Verify the Multimeter reads 1 10kQ Set the HP E1426A channel 1 controls to 502 CHAN1 COUP DCF Verify the Multimeter reads 500 0 50 Repeat steps 1 through 5 for channels 2 3 and 4 When repeating the procedure all references to channel 1 should be changed to the channel being tested Failure of this test indicates a faulty attenuator if resistance is out of specifications One of the PCA s also may be at fault if input resistance cannot be changed See troubleshooting in Chapter 8 T Disconnect test equipment Example This program will automatically prompt the user through the steps e required to perform an input r
38. Instrument specifications are listed in Appendix A of the HP Considerations E1426A User s Manual These specifications are the performance standards or limits against which the instrument may be tested 1 3 Safety This product is a Safety Class I instrument that is one provided with Considerations a protective earth terminal when installed in the mainframe The mainframe oscilloscope and all related documentation should be reviewed for familiarization with safety markings and instructions before operation or service Refer to the Safety Considerations page found at the beginning of this manual for a summary of the safety information Safety information for preventive maintenance testing adjusting or service is found in appropriate places throughout this manual 1 4 Manual Updates Manual Updates provide information necessary to update the manual The Manual Update is identified by the manual print date and part number both of which appear on the manual title page 1 5 Descr iption The Oscilloscope module is a general purpose four channel 500 MHz repetitive bandwidth oscilloscope which provides all the versatility and capability of digitizing oscilloscopes The Oscilloscope module is a VXIbus C Size message based product and can operate in a C Size VXIbus mainframe using an HP E1405 Command Module The Oscilloscope module is comprised of a CPU Printed Circuit Assembly HP P N E1426 69501 and an Acquisition
39. LE SIGNAL GENERATOR OSCILLOSCOPE ADAPTER MODULE MODULE e Figure 4 7 Trigger Sensitivity Test Set up 2 Set the Signal Generator controls as follows Frequency Mr 100 MHz e pO SECURE inen uA PIER 100 mV 3 Set the HP 1426 controls as follows Reset HP 1426 NGA nae RST Time base to 20 nsec TIM RANG 20 9 Turn on channel 1 eese VIEW 1 Turn off unused channels BLAN CHAN2 CHAN3 CHAN4 Channel 1 to DC at 500 CHAN1 COUP DCF Channel 1 range to 1 6 CHAN1 RANG 1 6 Channel 1 offset to CHAN1 0FFS 0 Acquisition type to average ACQ TYP AVER Acquisition count to 16 ACQ COUN 16 Trigger source to channel 1 TRIG SOUR CHANI1 Trigger level to 0 eese TRIG LEV 0 Start HP E1426A running eee RUN 4 On the HP 1426 front panel verify TRIGGERED LED is ON 5 Set the Signal Generator controls as follows Frequency urere iere ce Ple rt itl a ea yo e 500 MHz Output E 250 mV rms February 9 1991 Verification Tests 4 21 4 22 Notes Verification Tests 10 11 14 Set the HP 1426 controls as follows Time base to 100 nsec TIM RANG 1 7 Start HP E1426
40. Manual Appendix B for additional information on these errors Instrument Performance Out of Specification Ifa parameter is out of limits use the adjustment procedures in Chapter 5 to correct the problem e Catastrophic Failure When a catastrophic failure occurs troubleshooting using the procedures in paragraph 8 8 8 2 Service 8 6 Service Aids 8 7 Visual Inspection Note The following information is provided to assist the technician when performing maintenance on the Oscilloscope Assembly Parts and Cable Locations For specific assembly component descriptions and ordering information refer to table 6 3 Replaceable parts in Chapter 6 Chassis and frame parts as well as mechanical parts MP s and cables W or CBL are identified in the illustrated parts breakdown IPB in Chapter 6 Test Points and Adjustment Locations There are no test points for the Oscilloscope Manual adjustment locations are provided in Chapter 5 Service Aids on Printed Circuit Boards Service aids on printed circuit boards include pin numbers some reference designations and assembly part numbers Other Service Documents Service Notes Manual Updates and other service literature are available through Hewlett Packard For further information contact your nearest Hewlett Packard office Visually inspect the Oscilloscope for any signs of abnormal internally generated heat such as discolored printed circuit boards or compone
41. OD AUT Start data acquisition eere RUN Turn on channel 1 VIEW CHANI1 Turn off unused channels BLAN CHAN2 CHAN3 CHAN4 Channel 1 to DC at IMQ CHAN1 COUP DC Acquisition type to average AVER Acquisition count to 32 ACQ COUN 32 Channel 1 range to 40 1 40 Channel 1 offset to 17 5 CHANI1 OFFS 17 5 Measure channel 1 MEAS SOUR CHAN1 Digitize channel 1 2 cerro aho DIG CHAN1 Measure average voltage MEAS VAV 3 Verify that average voltage as measured by the HP E1426A is close to 0 volts Record the reading V13 4 Set the power supply to output 35 Vdc Repeat steps 2 and 3 Record the reading V2 5 Subtract V1 from V2 The difference should be between 34 5 V and 35 5 V Notes 6 Repeat steps 2 through 5 for all the HP E1426A RANGe and OFFSet values and power supply voltages specified in the table below RANGe OFFSet Power Supply Tolerance limis 17 50000 V 35 00 V 34 5 V to 35 5 V 7 00000 V 14 00 V 13 8 V to 14 2 V 3 50000 V 7 000 V 6 9 Vto 7 1V 1 75000 V 3 500 V 3 45 V to 4 05 V 1 400 V 1 38 V to 1 42 V 700 0 mV 690 mV to 710 mV 350 0 mV 345 mV to 355 mV 140 0 mV 138 mV to 142 mV 70 0 mV 69 mV to 71 mv 35 0 mV 34 3 mV 10 35 7 mV 14 0 mV 13 3 to 1
42. Summary The following general safety precautions must be observed during all phases of operation service and repair of this product Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use of the product Hewlett Packard Company assumes no liability for the customer s failure to comply with these requirements Ground the equipment For Safety Class 1 equipment equipment having a protective earth terminal an uninterruptible safety earth ground must be provided from the mains power source to the product input wiring terminals or supplied power cable DO NOT operate the product in an explosive atmosphere or in the presence of flammable gases or fumes For continued protection against fire replace the line fuse s only with fuse s of the same voltage and current rating and type DO NOT use repaired fuses or short circuited fuseholders Keep away from live circuits Operating personnel must not remove equipment covers or shields Procedures involving the removal of covers or shields are for use by service trained personnel only Under certain conditions dangerous voltages may exist even with the equipment switched off To avoid dangerous electrical shock DO NOT perform pr urea involving cover or shield removal unless you are qualified to do so DO NOT operate damaged equipment Whenever it is possible that the safety protection features built
43. T OUTPUT OUTPUT 70905 CLS 70905 RST 70905 TIM RANG 5 9 70905 TIM DEL 0 70905 VIEW CHANI 70905 BLAN CHAN2 CHAN3 CHAN4 70905 CHAN1 COUP DCF 70905 ACQ TYP AVER 70905 ACQ COUN 70905 CHAN1 RANG 4 70905 MEAS SOUR CHAN1 70905 DIG CHAN1 70905 MEAS TVOL 0 1 ENTER 70905 Timel FOR Measurement 1 TO 4 OUTPUT 70905 TIM DEL amp VALS Delay Measurement OUTPUT 70905 MEAS SOUR CHAN1 OUTPUT 70905 DIG CHAN1 OUTPUT 70905 MEAS TVOL 0 1 ENTER 70905 Time2 PRINT Delta t for amp VALS Delay Measurement 5 was amp VALS Time2 Timel NEXT Measurement PRINT Set the signal generator to 1 MHz and 150 mV rms PAUSE OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT 70905 AUTOSCALE 70905 TIM RANG 2E 6 70905 TIM DEL 0 70905 MEAS SOUR CHAN1 70905 DIG CHAN1 70905 MEAS TVOL 0 1 ENTER 70905 Time3 OUTPUT OUTPUT OUTPUT 70905 TIM DEL SE 4 70905 DIG CHANI 70905 MEAS TVOL 0 1 ENTER 70905 Time4 OUTPUT PRINT Delta t for 500E 9 was amp VALS Time4 Time3 70905 RST DATA 8 9 128 9 400 9 800 9 END Verification Tests February 9 1991 4 16 Trigger BB This test checks channel and external triggers for sensitivity at rated e Sensitivity Test bandwidth Procedure 1 Connect the equipment as shown below Use an N to BNC adapter and BNC cable to connect the signal generator output to the HP E1426A channel 1 input BNC CAB
44. Triggered LED ON 10 mV Range at 500 MHz Triggered LED ON 10 mV Range at 100 MHz Triggered LED ON Oscillator Output Test AC Calibrator Signal Verificatlon Tests 4 29 5 1 Introduction Note 5 2 Equipment Required Caution Notes 5 Adjustments This chapter contains adjustments that assure peak performance of the HP E1426A Oscilloscope This instrument should be adjusted after repair to assure performance Some Oscilloscope adjustments are performed electrically meaning a manual adjustment on a particular component is not necessary The order in which the adjustments are made is critical Perform adjustments in the order given To consider the tests valid the following conditions must be met e The Oscilloscope must have a 30 minute warm up at ambient temperature installed in the mainframe The line voltage must be 115 230 Vac 1105 For greatest accuracy the temperature of the test area should be between 18 C and 28 and should be stable within 1 Equipment required for the adjustment procedures is listed in Table 1 1 Recommended Test Equipment Any equipment that satisfies the critical specifications given in the table may be substituted Do not remove the module with power applied to the mainframe The firmware calibration procedures should only be performed after the instrument has run for one half hour at ambient temperature installed in the mainframe All firmware calibration a
45. able only on a trade in basis Defective assemblies must be returned for credit Assemblies required for spare parts stock must be ordered by the new assembly part number Table 6 2 lists reference designators and abbreviations used in the parts list schematics and throughout the manual In some cases two forms of the abbreviation are used one all in capital letters and one with partial or no capitals This occurs because the abbreviations in the parts list are always all capitals However in the schematics and other parts of the manual other abbreviation forms are used with both lower case and upper case letters Table 6 3 is the list of replaceable parts and is organized as follows a Electrical assemblies and their components in alpha numerical order by reference designation b Chassis mounted parts in alpha numerical order by reference designation c Mechanical parts Information given for each part consists of the following a The Hewlett Packard part number b Part number check digit CD c The total quantity Qty for the entire instrument except for option assemblies d The description of the part Replaceable Parts 6 1 6 2 e typical manufacturer of the part in a five digit code f The manufacturer s number for the part The total quantity for each part is given only once at the first appearance of the part number in the list for each major assembly Table 6 1 Part Numbers for Exchange Assemb
46. accessories are available for use with Available the HP E1426A Oscilloscope and include The HP 10400A Miniature Probe Family The HP 10002A 50 1 Voltage Divider Probe e The HP 10020A Resistive Divider Probe Kit The HP 1124A Active Divider Probe Kit For a complete list of oscilloscope accessories currently available contact your nearest Hewlett Packard sales office 1 10 Recommended Table 1 1 lists the test equipment recommended for testing adjusting Test Equipment and servicing the oscilloscope Essential requirements for each piece of test equipment are described in the Critical Specifications column Other equipment can be substituted if it meets or exceeds the critical specifications General information 1 3 Table 1 1 Recommended Test Equipment Recommended Instrument Critical Specifications Use Controller HP IB HP IB compatibility as defined by IEEE Standard HP Series 200 300 488 1978 and the identical ANSI Standard MC1 1 SHI T2 TEO L2 LEO SRO RLO PPO DCO and C1 2 3 4 5 Compatible with the oscilloscope HP E1400B P A T Slot 0 Command Module VXI C size w HPIB HP E1405A Digital Multimeter 5 1 2 digit resolution HP 3458A P T dc voltage accuracy 8 ppm yr 4 wire resistance accuracy 0 25 Fast rise Pulse Generator Rise Time 175ps faster is better PPL 1110B driver note A PPL 1107B head note Oscilloscope General purpose HP 54501A Power Meter Powe
47. and OUTPUT 70905 TIM RANG 5E 8 OUTPUT 70905 RUN PRINT Triggered PAUSE 100 mV rms 250 mV rms 7 5 mV rms 3 12 mV rms NEXT Channel OUTPUT 70905 RST END February 9 1991 Verlfication Tests 4 23 4 17 Oscillator Output 4 24 Test Procedure COMPEN CALIBRATOR OUTPUT Figure 4 8 Oscillator Output Test Set up Verificatlon Tests This test is optional The oscillator outputs are not specified in the instrument performance specifications The values given are typical e Results are not recorded in the test record 1 Connect the equipment as shown below Channels 2 4 must be disconnected BNC CABLE PROBE SATION AC 150 y COMMAND OSCILLOSCOPE MODULE MODULE 2 Set the HP E1426A controls as follows Reset HP E1428 itn Aa Per repere RST Perform an Autoscale function AUT Channel 1 to DC at 1 CHAN1 COUP DC Digitize channel 1 DIG CHAN1 Measure channel 1 frequency MEAS FREQ Digitize channel 1 DIG 1 Measure channel 1 peak to peak voltage MEAS VPP Verify the measured results are 1 5 kHz at 800 mV Set the HP 1426 controls as follows Channel 1 to DC at 500 CHAN1 COUP DCF Digitize channel 1 esses DIG CHANI MEAS VPP Measure channel 1 peak to peak voltage Verif
48. bruary 9 1991 To calculate response and change test set up Repeat for channels 2 4 Repeat for 80 mV range Verification Tests 4 17 4 15 Time This test uses a precise frequency source to check the accuracy of time Measurement Accuracy measurement functions o Test Procedure 1 Connect the equipment as shown below Use an N to BNC adapter and BNC cable to connect the signal generator output to the HP 1426 channel 1 input BNC CABLE OSCILLOSCOPE ADAPTER MODULE MODULE Figure 4 6 Time Measurement Accuracy Test Set up o 2 Set the Signal Generator controls as follows Frequency nennen teneo nhe es nere 500 MHz Output uu e nee me mee hme eater 150 mVrms 3 the HP E1426A controls as follows Reset HP E1426A nennen eere RST Time base to 5 nsec TIM RANG 5E 9 Time base delay to 0 sec TIM DEL 0 Turn on channel 1 0 VIEW CHANI1 Turn off unused channels BLAN CHAN2 CHAN3 CHAN4 Channel 1 to DC at 500 CHANI COUP DCF Acquisition type to average ACQ TYP AVER Acquisition count to 8 ACQ COUN 8 Channel 1 range to 400 mV CHAN1 RANG 4 Measure channel 1 MEAS SOUR 1 Digitize channel 1 eese DIG 1 Measure
49. bus lines e Trigger circuit provides a TTL Trigger output signal on the front panel Refer to the HP E1426A User s Manual for additional information on the HP 1426 Oscilloscope CONVERTER MEMORY TO FROM MAINFRAME C INTERFACE _ Y AD CONVERTER MEMORY INTERNAL TRIGGER TRIGGER OUT Oscilloscope Module Block Diagram 1 6 instruments Instruments covered by this manual are identified by a serial Covered by this number prefix listed on the title page Hewlett Packard uses a two Manual part serial number in the form XXXXAYYYYY where XXXX is the serial prefix is the country of origin A USA and YYYYY is the serial suffix The serial number prefix identifies a series of identical instruments The serial number suffix is assigned sequentially and is unique to each instrument If the serial number prefix of your instrument is greater than the one listed on the title page a yellow Manual Update supplement will explain how to adapt this manual to your instrument If the serial number prefix of your instrument is lower than the one listed on the title page information contained in Chapter 7 Manual Changes will explain how to adapt this manual to your instrument 1 7 Options There are no options currently available for the HP E1426A Oscilloscope Module 1 8 Accessories There are no accessories currently available for the HP E1426A Supplied Oscilloscope Module 1 9 Equipment number of oscilloscope
50. calibration the access and error LED s will be on 5 6 Adjustments February 9 1991 Note If the calibration time exceeds 1 minute the calibration is invalid Recycle power then repeat procedure If the condition repeats the instrument is malfunctioning Refer to the Service Manual for information on correcting the malfunction before proceeding 5 8 After calibration is complete LED s to off read the calibration event register to verify that no errors were generated during the procedure e If 0 is returned the calibration was successful e If 0 is not returned the calibration attempt was unsuccessful See Chapter 4 CALibrate Subsystem for more information Disconnect cable from input 2 and reconnect to input 3 Repeat steps 4 and 5 for input 3 Disconnect cable from input 3 and reconnect to input 4 Repeat steps 4 and 5 for input 4 When complete disconnect BNC cable and perform the Logic Trigger Calibration Procedure if necessary Example The following example shows how to perform a time null calibration The example is written using an HP IB select code of 7 primary address of 09 and secondary address of 05 for the Oscilloscope COMPatible programming language an HP Series 200 300 Computer with HP BASIC Execute 10 OUTPUT 70905 CLS Clear status 20 OUTPUT 70905 RST Resets the Oscilloscope to its default state 30 OUTPUT 70905 SUMM PRES Presets the Oscilloscope 40 FOR I 2 TO
51. cations at the time of shipment from the factory Hewlett Packard further certifies that its calibration measurements are traceable to the United States National Institute of Standards and Technology formerly National Bureau of Standards to the extent allowed by that organization s calibration facility and to the calibration facilities of other International Standards Organization members WARRANTY This Hewlett Packard product is warranted against defects in materials and workmanship for a period of three years from date of shipment Duration and conditions of warranty for this product may be superseded when the product is integrated into becomes a part of other HP products During the warranty period Hewlett Packard Company will at its option either repair or replace products which prove to be defective For warranty service or repair this product must be returned to a service facility designated by Hewlett Packard HP Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer However Buyer shall pay all shipping charges duties and taxes for products returned to HP from another country HP warrants that its software and firmware designated by HP for use with a product will execute its programming instructions when properly installed on that product HP does not warrant that the operation of the product or software or firmware will be uninterrupted or error free LIMITATION OF WARRANTY
52. d for disassembly and re assembly of the and Reassembly following items 1 CPU Circuit Assembly A2 Acquisition Circuit Assembly AT1 4 Vertical Attenuators W3 5 BNC Cable Assemblies A1 CPU Printed Circuit Assembly 1 Remove the A2 Acquisition PCA see instructions in this chapter 2 Disconnect the 500 cable W3 Caution Static electricity is a major cause of component failure To prevent damage to the electrical components in the Digitizing Oscilloscope observe anti static techniques whenever working on the Oscilloscope 3 Remove the 1 4 in threaded stand off from the rear center of the board 4 Remove the Torx T10 pan head screw from the front center of the board 5 Slide to the rear and remove the A1 CPU PCA 6 Reverse order to reinstall A1 CPU PCA 1 4 THREADED Al STAND OFF Ca Ga CJ D C7 t 000 0 05 0 8 6 Service Caution A2 Acquisition Printed Circuit Assembly 1 2 Place module on its left side and remove the four 5 8 in nuts from the Input 1 4 connectors Remove the single Torx T10 flat head screw that is directly above connector INPUT 1 Do not remove the other two screws on front panel Remove the Torx T10 flat head screw from the center rear of the right side shield Remove the two Torx T10 flat head screws from the rear of the unit Gently lift up the front end of the shield about 3 4 in to clear the BNC connectors then slide towards rear an
53. d remove shield 1 4 IN THREADED A2 STAND OFF DO NOT TOUCH CONNECTOR CO 6 TORX T10 d TORX T10 IT pa x hin pu HER Bu TORX Disconnect the following cables Two ribbon cables W1 and W2 e Disconnect the two 50 ohm cables W4 and W5 Static electricity is a major cause of component failure To prevent damage to the electrical components in the Digitizing Oscilloscope observe anti static techniques whenever working on the Oscilloscope 7 8 Remove the 1 4 in threaded stand off from the rear center of the board Slide to the rear and remove the A2 Acquisition PCA Reverse order to reinstall A2 Acquisition PCA not tighten the front panel BNC nuts until after the right side shield has been installed Service 8 7 1 4 Vertical Attenuators 1 Remove the A2 Acquisition see instructions in this chapter 2 Remove the two Torx T10 pan head screws from the circuit side of the board 3 Lift straight up to unplug and remove the Vertical Attenuator 4 Reverse order to reinstall AT1 4 Vertical attenuators 5 Perform High Frequency Pulse Response Adjustment see instructions in chapter 5 AT1 4 8 8 Service 3 5 Cable Assemblies 1 Remove the A2 Acquisition see instructions in this chapter Unplug and mark the SMA connector Remove the 5 8 32 in nut Slide to the rear and remove the BNC Cable Assembly Reverse order to reins
54. djustment procedures should be done in the order given After calibrating you MUST perform an AUToscale RST reset to return to normal operation Adjustments 5 1 5 3 Vertical Vertical calibration is performed on channels one through four Calibration Procedure simultaneously using the following procedure 1 Setthe CAL FACTOR PROTECT switch to UNPROTECTED 2 Connect the Oscilloscope DC Calibrator Output connector to the Input 1 4 connectors Note Verify that the BNC cables are not longer than 1 meter and as close in length as possible PROTECTED UNPROTECTED TOP VIEW Figure 5 1 Example Vertical Calibration Setup Load the default calibration data Perform clear status reset then preset the Oscilloscope Select and start the vertical calibration routine Calibration will last for approximately 15 minutes During calibration the access and error LED s will be on 5 2 Adjustments February 9 1991 Note Example If the calibration time exceeds 15 minutes the calibration is invalid Recycle power then repeat procedure If the condition repeats the instrument is malfunctioning Refer to the Service Manual for information on correcting the malfunction before proceeding 6 After calibration is complete LED s to off read the calibration event register to verify that no errors were generated during the procedure e If 0 is returned the calibration was successful If 0 is not re
55. driving MOS switches Assembly Exchange Program Table 6 1 lists assemblies that are available on an exchange basis Refer to the table and the Exchange Assemblies paragraph in Chapter 6 for further information Limited Repair Assemblies Repair of non exchange assemblies is limited to replacement of selected parts Replaceable parts fuses connectors hardware for all Oscilloscope assemblies are listed in table 6 2 Post Repair Adjustments Adjustment procedures are provided in Chapter 5 Post Repair Safety Checks Visually inspect the Oscilloscope for any signs of abnormal internally generated heat such as discolored printed circuit boards or components damaged insulation or evidence of arcing Determine and remedy the cause of any such condition Service 8 11 A References Referenced This appendix lists all operating installation and service manuals Publications referenced in this manual Publication Title Publication Part Number Ordering Address HP E1400B User s Manual E1400 90005 See Sales and Support Offices listed in the back of this manual HP E1405A User s Manual E1405 90001 See Sales and Support Offices listed in the back of this manual HP E1426A User s Manual E1426 97002 See Sales and Support Offices listed in the back of this manual HP 1426 Service Manual E1426 97003 See Sales and Support Offices listed in the back of this manual References A 1 Ko HEWLETT PACKARD Hewlett Packard Printed i
56. echanical center channel 1 is A2 R501 AT2 channel 2 is A2 R502 AT3 channel 3 is A2 R503 4 channel 4 is A2 R504 2 Connect the equipment as shown below Pulse Generator output is connected to the Input connector of the channel that is being adjusted using a type N cable 3 foot and adapters see table 1 1 Apply power to the Pulse Generator Set the Oscilloscope controls on the channel being adjusted as follows Reset Oscilloscope eese eene eee nnne RST Coupling to DC at 500 CHAN n COUP DCF Perform an Autoscale eese eene eene AUT Channel Range to 800 mV CHAN n RANG 800E 3 Channel Offset to 0 1 CHAN n OFFS 0 1 Time Base Range to 20 nsec TIM RANG 20E 9 Time Base Delay to 1 9 nsec TIM DEL 1 9E 9 Digitize the channel being adjusted DIG CHAN n Measure VBASe MEAS SOUR CHAN n VBAS Verify measured result is s100 Measure MEAS SOUR CHAN n VTOP Verify measured result is 100 e If VBASe measured result is 5100 an invalid measurement has occurred due to invalid data Find the cause and correct before continuing e If VTOP measured result is 5100 an invalid measurement has occurred due to invalid data Find the cause and correct before continuing correct proceed
57. eee eee nnne the nonne re rt 37 Operator s Checks ne nnne Page Contents 1 Contents 2 Chapter 4 VERIFICATION TESTS 4 1 Introduction RRRRRRRRRRRRRRRREMMMMEMMMMMMMMMMMMM 42 Equipment Required cccccscccssescsssssrsscsnsecscccccssccscceceecenesensevsssescs 43 Test Record 44 Calibration Cycle 45 Test Procedures o c ccccsssesccsssssescsseccensesessecssseesecssceceessecceeeenssseees 46 Functional Verification 47 Self Test Procedure ccsccccscccessssssssecssrcessceccsessnssssceescesesesseseesess 48 Operation Verification 49 Performance Verification _ 410 DC Calibrator Test Procedure 411 Input Resistance Test Procedure _ 412 Voltage Measurement Accuracy Test Procedure 413 Offset Accuracy Test Procedure 414 Bandwidth Test Procedure 4 15 Time Measurement Accuracy Test Procedure
58. ements of Directive FTZ 1046 84 The German Bundespost has been notified that this equipment was put into circulation and has been granted the right to check the product type for compliance with these requirements Additional Information Measurement Equipment If test and measurement equipment is operated with unscreened cables and or used for measurements on open set ups the user has to assure that under operating conditions the Radio Interference Limits are still met at the border of the user s premises for Test and DECLARATION OF CONFORMITY according to ISO IEC Guide 22 and EN 45014 Hewlett Packard Co Manufacturer s Name Manufacturer s Address Colorado Springs Division 1900 Garden of the Gods Rd Colorado Springs CO 80907 USA declares that the product Product Name Digitizing Oscilloscope Module Mode Number s HP E1426A Product Option s All conforms to the following Product Specifications Safety IEC 1010 1 1990 A1 EN 61010 1 1993 UL 3111 CSA C22 2 No 1010 1 1993 EMC CISPR 11 1990 EN 55011 1991 Group 1 Class A IEC 801 2 1991 EN 50082 1 1992 4 kV CD 8 kV AD 801 3 1984 EN 50082 1 1992 3 V m 1kHz 80 AM 27 1000 MHz IEC 801 4 1988 EN 50082 1 1992 0 5 kV Sig Lines 1 kV Power Lines Supplementary Information The product herewith complies with the requirements of the Low Voltage Directive 73 23 EEC and the EMC Directive 89 336 EEC and carries the CE marking
59. en 19 820 V and 20 180 V 4 Repeat steps 2 and 3 for all the HP E1426A RANGe and OFFSet values and power supply voltages specified in the table below 4V 20 0000V 20 000 V 180 mV 19 820 V to 20 180 V 1 6V 9 00000V 9 000V 77 mV 8 923 V to 9 077 V 800 mV 5 00000 v 5 000 v 41 mV 4 959 V to 5 041 V Verification Tests 4 11 5 Repeat steps 2 through 4 for channels 2 3 and 4 o Notes When repeating the procedure all references to channel 1 should be changed to the channel being tested Turn off all unused channels using the BLANk command Offset errors can be caused by the need for self calibration Perform vertical calibration see Adjustment procedures Chapter 5 before troubleshooting instrument If self calibration fails to correct problem cause may be the attenuator or A2 PCA See troubleshooting in Chapter 8 6 Disconnect test equipment 4 12 Verification Tests Execute 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 Example This program will automatically prompt the user through the steps required to perform an offset accuracy test and print out the results of each measurement The data at the end of the program corresponds to the values for range offset and supply voltage in each measurement The example is written using HP IB select code of 7 primary address of 09
60. ent Accuracy Test Set up 4 18 4 7 Trigger Sensitivity Test Set up eee 4 21 4 8 Oscillator Output Test Set up cen ene 4 24 5 1 Example Vertical Calibration Setup 5 2 5 2 Example Delay Calibration Setup 54 5 3 Example Time Null Calibration Setup 5 6 5 4 Example Logic Trigger Calibration Setup 5 8 5 5 High Frequency Pulse Response Adjustment Setup 5 11 6 1 Oscilloscope Replaceable Parts 6 6 6 2 1 CPU PCA Replaceable Parts 6 7 6 3 A2 Acquisition PCA Replaceable Parts 6 7 Contents 3 1 0 fA VA Sis Figure 1 1 HP E1426A E Accessories Supplied General Information 1 General Information 1 1 Introduction The 1426 Service Manual contains all the information required to test adjust troubleshoot and repair the Hewlett Packard Model E1426A C Size VXI 500 MHz Digitizing Oscilloscope Figure 1 1 shows the HP E1426A Oscilloscope along with all of the externally supplied accessories Additional copies of the HP E1426A User s Manual and Service Manual can be ordered separately through your nearest Hewlett Packard office 1 2 Specifications
61. esistance test The program will pause to allow the user to get the reading from the multimeter The example is written using HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A e COMPatible programming language HP Series 200 300 Computer with HP BASIC Execute 10 OUTPUT 70905 CLS 20 OUTPUT 70905 RST 30 FOR Channel 1 TO 4 40 PRINT Connect the multimeter to scope channel amp VALS Channel 50 PRINT 1 MOhm 60 OUTPUT 70905 CHAN amp VALS Channel amp COUP DC 70 PAUSE 80 PRINT 50 Ohm 90 OUTPUT 70905 CHAN EVALS Channel amp COUP DCF 100 PAUSE 110 NEXT Channel 120 OUTPUT 70905 RST e 130 END Nov 15 1990 Verification Tests 4 7 Measurement Accuracy 4 8 4 12 Voltage Test Procedure This test verifies the voltage measurement accuracy of the instrument dual cursor measurement is made so offset errors are not a factor 1 Connect the equipment as shown below Use a banana to BNC adapter to connect the BNC cable to the power supply Monitor the supply with the Multimeter Set the power supply for 0 V output BNC TO DUAL BANANA TO DUAL BANANA COMMAND OSCILLOSCOPE ADAPTER MODULE MODULE Figure 4 3 Voltage Measurement Accuracy Test Set up Verification Tests 2 Setthe HP 1426 controls as follows Reset HP 1426 esee teed eden en Versa RST Time base to automatic TIM M
62. et to match the available line voltage and the correct fuse is installed An uninterruptible safety earth ground must be provided from the main power source to the product input wiring terminals power cord or supplied power cord set Any interruption of the protective grounding conductor inside or outside the instrument or disconnecting the protective earth terminal will cause a potential shock hazard that could result in personal injury Grounding one conductor of a two conductor outlet is not sufficient protection In addition verify that a common ground exists between the unit under test and this instrument prior to energizing either unit Whenever it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an autotransformer for voltage reduction make sure the common terminal is connected to neutral that is the grounded side of the mains supply Servicing instructions are for use by service trained personnel only To avoid dangerous electric shock do not perform any servicing unless qualified to do so Operating instructions 3 1 Maintenance described in the manual is performed with power supplied to the instrument while protective covers are removed Energy available at many points may if contacted result in personal injury Where maintenance can be performed without power applied the power s
63. hen repeating the procedure all references to channel 1 should be changed to the channel being tested Turn off all unused channels using the BLANk command Bandwidth errors can be caused by the need for adjustment Perform high frequency pulse response adjustment see Adjustment procedures Chapter 5 before troubleshooting instrument If adjustment fails to correct problem cause may be the attenuator or A2 PCA See troubleshooting in Chapter 8 This program is provided to show how to perform a bandwidth test and print out the results of each measurement The program pauses to allow the user to adjust the signal generator and power meter The example is written using e HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A COMPatible programming language an Series 200 300 Computer with HP BASIC OUTPUT 70905 TIM RANG 2E 6 OUTPUT 70905 VIEW CHANI OUTPUT 70905 BLAN CHAN2 CHAN3 CHAN4 OUTPUT 70905 CHAN1 COUP DCF OUTPUT 70905 TRIG SOUR CHAN1 OUTPUT 70905 AVER OUTPUT 70905 ACQ COUN 32 OUTPUT 70905 1 3 2E 1 OUTPUT 70905 MEAS SOUR CHAN1 OUTPUT 70905 DIG CHAN1 OUTPUT 70905 MEAS VPP ENTER 70905 PRINT A PAUSE To adjust signal generator and power meter OUTPUT 70905 TIM RANG 5 9 OUTPUT 70905 MEAS SOUR 1 OUTPUT 70905 DIG CHAN1 OUTPUT 70905 MEAS VPP ENTER 70905 B PRINT B PAUSE END Fe
64. hould be removed Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply For continued protection against fire hazard replace the line fuse s only with 250V fuse s of the same current rating and type for example normal blow time delay etc Do not use repaired fuses or short circuited fuseholders Caution Static electricity is major cause of component failure To prevent damage to the electrical components in the Oscilloscope observe anti static techniques whenever working on the Oscilloscope 3 3 Preventive Preventive maintenance for the Oscilloscope consists of periodically Maintenance cleaning the Oscilloscope Note Hewlett Packard recommends a 12 month interval between cleaning the Oscilloscope However cleaning intervals are mostly dependent upon where the Oscilloscope is used The Oscilloscope should be cleaned more often if it is used in a dusty or very humid area 3 4 Required Table 3 1 shows the necessary equipment to perform scheduled Equipment preventive maintenance Table 3 1 Preventive Maintenance Equipment Requirement Soft bristle brush Removing dust from printed circuit card Mild Soap Solution Cleaning panel Lint free cloth Cleaning panel Warning Before removing the Oscilloscope from the mainframe make sure the mainframe is disconnected from the power source to eliminate the possibility of electrical shock
65. iature 5A 2110 0699 2110 0699 Fuse Sub Miniature 5A 2110 0699 2110 0699 Fuse Sub Miniature 5A 2110 0699 2110 0699 Fuse Sub Minlature 5A 2110 0699 1251 8828 Connedor Post 2X20 1251 8828 1251 8828 Connedor Post 2X20 1251 8828 1251 8106 Connector Post 2X10 1251 8106 1250 0257 Connector Sub Miniature 1250 0257 1252 1596 Connector Right Angle 96 Pin 1252 1596 1252 1596 Connector Right Angle 96 Pin 1252 1596 3101 2640 Switch Rocker 10 Position 5 V 0 1 3101 1596 3101 2243 Switch Rocker 8 Position 5 V 0 1 A 3101 2243 3101 2719 Switch Slide 2 Position 5 V 0 1 A 3101 2719 Acquisition Printed Circul Assembly NONE 1426 69502 Acquisition Printed Circut Assembly Exchange repair mited to replacement of following parts 1250 0257 Connector Sub Miniature 1250 0257 1250 0257 Connedor Sub Minlature 1250 0257 1251 8828 Connector Post 2X20 1251 8828 1261 8828 Connedor Post 2X20 1251 8828 1252 2952 Connector Post 2X12 1252 2952 1252 2952 Connedor Post 2X12 1252 2952 1252 2952 Connector Post 2X12 1252 2952 1262 2952 Connedor Post 2X12 1252 2952 E1426 61601 E1426 61601 1426 61601 1426 61601 1426 61602 1426 61602 1426 61602 1426 61602 1426 61602 1426 61602 E1400 84105 E1400 84105 1400 84108 1400 84106 1426 00201 1426 00201 1426 00601 1426 00801 1426 00602 1426 00602 54503 63401 54503 63401 54503 63401 54503 63401 54503 63401 54503 63401 54503 63401 54503 63401 COMMON HARDWARE 05
66. l 450 END IF 460 470 PRINT Overshoot is within range 480 PRINT END 490 GOTO The end 500 510 gt error 520 PRINT The measurements were out of range 530 Retry 40 550 The end 560 END 5 12 Adjustments February 9 1991 6 1 Introduction 6 2 Ordering Information 6 3 Exchange Assemblies 6 4 Abbreviations 6 5 Replaceable Parts List 6 Replaceable Parts This chapter contains information for ordering parts Table 6 1 lists exchange assemblies Table 6 2 lists abbreviations used in the parts list and the manual Table 6 3 lists all replaceable parts in reference designator order Table 6 4 contains the names and addresses that correspond to the manufacturer s code numbers To order a part listed in the replaceable parts table quote the Hewlett Packard part number with the check digit indicate the quantity required and address the order to the nearest Hewlett Packard office The check digit will ensure accurate and timely processing of your order To order a part that is not listed in the replaceable parts table include the instrument model number instrument serial number description and function of the part and the number of parts required Address the order to the nearest Hewlett Packard office Table 6 1 lists assemblies within the instrument that may be replaced on an exchange basis Exchange factory repaired and tested assemblies are avail
67. l Inspection attese 88 Troubleshooting Test 89 Repair and Replacement natn tnter assa stas 810 Disassembly and Reassembly 1 8 11 Repair RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRREEEEEEMM Appendices Page A References A 1 LIST OF TABLES No Title Page 1 1 Recommended Test Equipment 14 3 1 Preventive Maintenance Equipment 3 2 4 1 Verification Test Record 4 26 6 1 Part Numbers for Exchange Assemblies 6 2 6 2 Reference Designators and Abbreviations 6 3 6 3 Replaceable Parts Luce eer Dad ea Ep P EX SYN ERR ET eb RA S 6 5 6 4 Code List of 6 8 LIST OF ILLUSTRATIONS No Title Page 1 1 HP E1426A E Accessories Supplied 1 0 1 2 Oscilloscope Module Block Diagram 1 2 4 1 DC Calibrator Test Set up 4 4 4 2 Input Resistance Test Set up eee 4 6 4 3 Voltage Measurement Accuracy Test Set up 4 8 4 4 Offset Accuracy Test Set up Ht 4 11 4 5 Bandwidth Test Set up eene eee 4 14 4 6 Time Measurem
68. lies Reference aan Part Number Designation Description A1 CPU PCA E1426 69501 Not available A2 Acquisition PCA E1426 69502 Not available When ordering extra assemblies for spare parts stock use new assembly part number only Exchange orders require return of the defective part Replaceable Parts Table 6 2 oe ee ee assembly attenuator isolator termination battery capacitor coupler diode diode thyristor varactor directional coupler delay line annunciator signaling device audible or visual lamp LED A ampere ac alternating current ACCESS accessory ADJ adjustment A D analog to digital AF audio frequency automatic frequency control automatic gain control AL aluminum ALC automatic level control AM amplitude modulation AMPL amplifier APC automatic phase control ASSY assembly AUX auxiliary avg average AWG American wire gauge balance binary coded decimal BD board BECU beryllium copper BFO beat frequency oscillator BH binder head BKDN breakdown BP bandpass BPF bandpass filter BRS brass BWO backward wave oscillator CAL calibrate gt Counter clockwise CER ceramic CHAN channel cm centimetre CMO cabinet mo
69. list log logarithm ic LPF low pass filter low voltage metre distance ee n oo milliampere MAX maximum MN megohm meg 10 used in parts list METFLM metal film MET OX metallic oxide MF medium frequency microfarad used in parta list MFR manufacturer mg milligram MHz megahertz mH millihenry mho mho MIN minimum min minute time wee eee ee o minute plane angle MINAT miniature mm millimetre internal Replaceable Parts 6 3 6 4 Table 6 2 Reference Designators and Abbreviations 2 of 2 modulator momentary metal oxide semiconductor millisecond mounting meter indicating device millivolt millivolt ac millivolt dc millivolt peak millivolt peak to peak millivolt rms milliwatt multiplex mylar microampere microfarad microhenry micromho microsecond microvolt microvolt ac microvolt dc microvolt peak microvolt peak to peak microvolt rms microwatt no connection normally closed negative nanofarad nickel plate normally open nominal normal negative positive negative negative positive zero zero tempera ture coefficient not recommended for field replacement notseparately replaceable nanosecond nanowait order by descrip tion Replaceable Parts outside diameter
70. n the USA
71. nd References in COMPatible and SCPI e Error Messages in COMPatible and SCPI 3 7 Operator s Checks 3 4 Note Operating instructions The operator s checks should be performed after preventive maintenance minimum or any time to verify that the Oscilloscope is connected properly and is responding to the simplest commands If necessary refer to the HP E1405A Command Module User s Manual or applicable command module manual for information on address selection and external cabling guidelines Refer as required to the HP E1426A User s Manual for information on SCPI and COMPatible commands 1 Verify the Oscilloscope and Command Module are installed in the mainframe 2 On the mainframe connect a power cable and set the power to ON Verify the mainframe command module performs a proper power up sequence If correct proceed with step 3 e If incorrect troubleshoot mainframe command module before proceeding 3 Perform clear status reset then preset the Oscilloscope 4 Execute the Oscilloscope functional test using the TEST TALL e command 5 Allow approximately 15 seconds for the test to complete then read the test event register to verify that no errors were generated during the test e If 0 is returned then no failure was encountered e If any number other than 0 is returned then a failure was detected See Chapter 8 for troubleshooting information Note Test failures can be caused by
72. nd grounding straps when servicing is required on sensitive components Use care when unplugging ICs from high grip sockets 8 3 Equipment Equipment required for troubleshooting and repair of the mainframe Required 15 listed in Table 1 1 Recommended Test Equipment Any equipment that satisfies the critical specifications given in the table may be substituted Pozidriv Screwdrivers Many screws in the mainframe appear to be Phillips type but are not To avoid damage to the screw head slots Pozidriv screwdrivers should be used HP P N 8710 0899 is the No 1 Pozidriv and HP P N 8710 0900 is the No 2 Pozidriv Torx Screwdrivers Some screws in the mainframe appear to be Hex type but are not To avoid damage to the screw heads Torx screwdrivers must be used HP 8710 1284 is size T 10 8 4 Troubleshooting 8 5 General Oscilloscope problems usually fall into four general categories turn on errors operator errors instrument performance out of specification and catastrophic failures The troubleshooting strategy is different for each category Turn on Errors An error number other than 0 returned when an instrument self test fails indicating that the built in diagnostic routine has detected some problem Recycle power and repeat the self test If the error repeats troubleshooting using the procedures in paragraph 8 8 e Operator Errors Apparent failures often result from operator errors Refer to the HP E1426A Users
73. nel being tested Repeat steps 2 through 12 for channels 2 3 and 4 When repeating the procedure all references to channel 1 should be changed to the channel being tested Turn off all unused channels using the BLANk command 13 Connect the power splitter to channel 1 14 Set the Signal Generator controls as follows Frequency Mr 1MHz CE 20 6 dBm Setting the output to 20 6 dBm will produce a 26 6 dBm level at the HP 1426A 500 input loss occurs through the power splitter Verification Tests 4 15 4 16 Verification Tests 15 16 17 18 19 20 21 22 23 24 25 Set the HP 1426 controls as follows Reset HP E1426A RST Time base to 2ysec TIM RANG 2 6 Turn on channel 1 ecce VIEW 1 Turn off unused channels BLAN CHAN2 CHAN3 CHAN4 Channel 1 to DC at 509 CHAN1 COUP DCF Trigger source to channel 1 TRIG SOUR CHAN1 Acquisition type to average ACQ TYP AVER Acquisition count to 32 ACQ COUN 32 Channel 1 range to 40 mV CHAN1 RANG 4E 2 Measure channel 1 MEAS SOUR CHANI Digitize channel 1 2 DIG 1 Measure peak to peak voltage MEAS VPP Record the measured peak
74. nes Refer as required to the HP E1426A User s Manual for information on SCPI and COMPatible commands 1 Verify the HP E1426A and Command Module are installed in the mainframe 2 On the mainframe connect a power cable and set the power to ON Verify the mainframe command module performs a proper power up sequence e Ifcorrect proceed with step 3 e If incorrect troubleshoot mainframe command module before proceeding 3 Perform clear status reset then preset the HP E1426A 4 Execute the test all routine using the TEST TALL command 5 Allow approximately 15 seconds for the test to complete then read the test event register to verify that no errors were generated during the test If 0 is returned then no failure was encountered If any number other than 0 is returned then a failure was detected See Chapter 8 for troubleshooting information Note Example Note Test failures can be caused by improper cabling or improper selection of the interface select code primary address setting and or secondary address setting Verify proper connection and address selection using the applicable command module and mainframe manuals before troubleshooting For the example use an HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A COMPatible programming language an HP Series 200 300 Computer with HP BASIC 10 OUTPUT 70905 15 Clear status
75. nts damaged insulation or evidence of arcing Determine and remedy the cause of any such condition Switch Settings Verify the logical address setting is set to the correct setting factory set at 40 Verify the bus request grant level setting is set to the correct setting factory set at level 3 Refer to the HP E1426A User s Manual for more information Connections Verify that all connector contacts are not damaged and that all cable connectors are making positive contact Panel BNC Connectors Backplane connector contacts Ribbon cable connector contacts Service 8 3 8 8 Troubleshooting Perform the following steps to isolate a malfunction within the Test Oscilloscope to a user replaceable component o Note Chapter 6 contains a list of all user replaceable parts If a part is not listed return the defective PCA to Hewlett Packard for exchange 1 Perform clear status CLS reset RST then preset SUMM PRES the Oscilloscope 2 Execute the Oscilloscope self diagnostic using the TEST TALL command 3 After the test is complete read the results in the summary questionable test event register SSUMM QUES TEST If O is returned then no error has occurred Proceed with step 4 If 0 is not returned query the individual TEST event registers to determine the malfunction Use the information provided below to help isolate the problem See Chapter 4 or 6 in the E1426A User s Manual
76. olytic encapsulated external farad field effect transistor fillister head frequency modulation FM FP front panel FREQ frequency FXD fixed E gram GE germanium GHz gigahertz GL s glass GRD ground ed henry sos hour heterodyne hexagonal head hardware high frequency mercury 2 o s high Hewlett Packard high pass filter hour used in parta list high voltage eon n n s Hertz integrated circuit inside diameter intermediate frequency impregnated inch inncandescent include s input insulation All abbreviations in the parts list will be in upper case Reference Designators and Abbreviations 1 of 2 integrated circuit microcircuit electron tube voltage regulator breakdown diode W cable transmission path wire X rrr BOcket Y crystal unit piezo electric or quartz Z sees tuned cavity tuned circuit INT kg e kilogram kHz cecoes kilohertz kna kilohm kV kilovolt pound LC inductance capacitance LED light emitting diode LF low frequency LG eee eww oo es long LH left hand limit linear taper used in parts list lin eere linear LK WASH lock washer LO low local oscillator G logarithmic taper used in parts
77. omputer with HP BASIC OPTION BASE 1 DIM Range 12 Offset 12 Power supply 12 Zero offset 12 RESTORE READ Range Offset Power supply OUTPUT 70905 CLS OUTPUT 70905 RST FOR Channel 1 TO 4 OUTPUT 70905 TIM MOD AUT OUTPUT 70905 RUN OUTPUT 70905 BLAN 1 2 4 OUTPUT 70905 VIEW CHAN amp VALS Channel OUTPUT 70905 CHAN amp VAL Channel amp COUP DC OUTPUT 70905 AVER OUTPUT 70905 ACQ COUN 32 PRINT Connect the power supply to scope channel amp VALS Channel FOR Measurement 1 TO 12 PRINT Set the power supply to 0 volts PAUSE OUTPUT 70905 CHAN amp VAL Channel 6 amp VALS Range Measurement OUTPUT 70905 CHAN amp VALS Channel amp OFFS amp VALS Offset Measurement OUTPUT 70905 MEAS SOUR CHAN SVALS Channel OUTPUT 70905 DIG CHAN amp VALS Channel OUTPUT 70905 MEAS VAV ENTER 70905 Zero_val PRINT Set the power supply to amp VALS Power_supply Measurement amp volts PAUSE OUTPUT 70905 DIG CHAN amp VAL Channel OUTPUT 70905 MEAS ENTER 70905 Voltage val Result Voltage val Zero val PRINT Result amp VAL Result NEXT Measurement NEXT Channel OUTPUT 70905 RST values for each measurement DATA 40 16 8 4 1 6 800E 3 400E 3 160E 3 80E 3 40E 3 16E 3 8E 3 Offset values for each measurement DATA 17 5 7 3 5 1 75 700E 3 350E 3 175E 3 70E 3 35E 3 17 5E 3 7E 3 3 5E 3
78. ould be used for re packaging with commercially available materials Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard office or service center complete one of the blue tags mentioned above and attach it to the instrument Use a strong shipping container double wall carton made of 2 4 MPa 350 psi test material is adequate Use enough shock absorbing material 75 to 100 mm layer 3 to 4 inches around all sides of the instrument to provide firm cushion and prevent movement in the container Protect the front panel with cardboard Seal the shipping container securely Mark the shipping container FRAGILE to assure careful handling 3 Operating Instructions 3 1 Introduction This chapter provides operating information for the HP E1426A Oscilloscope Included are detailed operator s preventive maintenance procedures operating instructions and operator s checks Both preventive maintenance and the operator s checks should be performed on a regular scheduled basis to keep the oscilloscope in an operational condition and also prevent more serious malfunctions from occurring 3 2 Safet Considerations Warning This paragraph contains information cautions and warnings which must be followed for your protection and to avoid damage to the equipment when performing preventive maintenance Before applying power verify that the mainframe the oscilloscope is installed in is s
79. performance or use of this material This document contains proprietary information which is protected by copyright All rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Hewlett Packard Company HP assumes no responsibility for the use or reliability of its software on equipment that is not furnished by HP Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in subdivision b 3 ii of the Rights in Technical Data and Computer Software clause at 52 227 7013 Hewlett Packard Company 3000 Hanover Street Palo Alto California 94304 Herstellerbescheinigung Hiermit wird bescheinigt dass dieses Gerat System HP E1426A in Ubereinstimmung mit den Bestimmungen von Postverfugung 1046 84 funkentstort ist Der Deutschen Bundespost wurde das Inverkehrbringen dieses Gerates Systems angezeigt und die Berechtigung zur Uberpr fung der Serie auf Einhaltung der Bestimmungen eingeraumt Zusatzinformation fur Mess und Testgerate Werden Mess und Testgerate mit ungeschirmten Kabeln und oder in offenen Messaufbauten verwendet so ist vom Betreiber sicherzustellen dass die Funk Entstorbestimmungen unter Betriebsbedingungen an seiner Grundst cksgrenze eingehalten werden Manufacturer s Declaration This is to certify that the equipment HP E1426A E meets the radio frequency interference requir
80. r Sensor 1 500 MHz 70 dBm to 0 dBm 3 accuracy HP 436A 8482A O Power Splitter 50 Q type outputs differ by 0 15 dB HP 11667A P Power Supply 7 mV 35 V dc 0 1 mV resolution HP 6114A Signal Generator 1 500 MHz sine wave HP 8656B Opt 001 amplitude 3 170 mVrms time base accuracy 10 001965 Cables and Adapters Adapter 2 BNC to dual banana HP 1251 2277 P Adapter 3 BNC tee mXf f HP 1250 0781 P T Adapter BNC f f HP 1250 0080 T Adapter N m to BNC f HP 1250 0780 P Adapter N m to BNC m HP 1250 0082 P Adapter Type N f to BNC m HP 1250 0077 A Adapter Type N f to SMA m HP 1250 1562 A Cable 2 BNC 3 foot HP 10503A P T Cable 4 BNC 9 inch HP 10502A N 3 foot m Note PPL Picosecond Pulse Labs M Preventative Maintenance Functional Verification Check C Operational Verification Tests P Performance Verification Tests Adjustments T Troubleshooting HP 11500A or B 1 4 General Information 2 Installation 2 1 Introduction This chapter provides the information needed to install the HP E1426A Oscilloscope Included is information pertinent to initial inspection preparation for use environment storage and shipment 2 2 Initial Inspection Warning To avoid hazardous electrical shock do not perform electrical tests when there are sign
81. r it is likely that the protection has been impaired the instrument must be made inoperative and be secured against any unintended operation If this instrument is to be energized via an autotransformer for voltage reduction make sure the common terminal is connected to neutral that is the grounded side of the mains supply Servicing instructions are for use by service trained personnel only To avoid dangerous electric shock do not perform any servicing unless qualified to do so Maintenance described in the manual is performed with power supplied to the instrument while protective covers are removed Energy available at many points may if contacted result in personal injury Where maintenance can be performed without power applied the power should be removed Capacitors inside the instrument may still be charged even if the instrument has been disconnected from its source of supply For continued protection against fire hazard replace the line fuse s only with 250V fuse s of the same current rating and type for example normal blow time delay etc Do not use repaired fuses or short circuited fuseholders Service 8 1 Caution Do not disconnect or remove any modules in the mainframe unless the mainframe is unplugged Some modules contain devices that can be damaged if the board is removed when the power is on Several components including MOS devices can be damaged by electrostatic discharge Use conductive foam a
82. s LED s on the front panel 6 Select and start the logic trigger calibration routine Verify that the triggered LED flashes Observe the access and error LED s e If both are on no adjustment is required e If only one is ON rotate the logic trigger adjustment until both LED s remain ON Approximately 15 seconds after no further rotation of the adjustment the triggered LED will flash faster then all LED s will go out 7 After calibration is complete LED s to off read the calibration register to verify that no errors were generated during the procedure e f 0 is returned the calibration was successful e f 0 is not returned the calibration attempt was unsuccessful See Chapter 4 CALibrate Subsystem for more information 8 Disconnect BNC cable and set the CAL FACTOR PROTECT switch to PROTECTED The following example shows how to perform a logic trigger calibration The example is written using 10 20 30 40 50 60 70 80 HP IB select code of 7 primary address of 09 secondary address of 05 for the Oscilloscope COMPatible programming language gn HP Series 200 300 Computer with HP BASIC Execute OUTPUT 70905 CLS OUTPUT 70905 RST OUTPUT 70905 SUMM PRES OUTPUT 70905 SUMM QUES CAL ENTER 70905 D PRINT D IF D 0 THEN 130 OUTPUT 70905 CAL SCAL LTC Clear status Resets the Oscilloscope to its default state Presets the Oscilloscope Read
83. s of 09 and secondary address of 05 for the Oscilloscope e COMPatible programming language e an HP Series 200 300 Computer with HP BASIC Execute 10 OUTPUT 70905 CLS Clear status 20 OUTPUT 70905 RST Resets the Oscilloscope to its default state 30 OUTPUT 70905 SUMM PRES Presets the Oscilloscope 40 FOR I 1 TO 4 Input testing loop 50 OUTPUT 70905 CAL SCAL DEL CHAN amp VALS I Selects input n delay calibration routine n input 1 4 60 OUTPUT 70905 CAL SCAL BCAL Starts delay calibration routine 70 OUTPUT 70905 SUMM QUES CAL Read calibration event register 80 ENTER 70905 B Enter calibration event register results 90 PRINT B Print calibration event register results 100 PAUSE Pause to connect next input 110 NEXT I Repeat for inputs 2 4 120 END Terminate program Adjustments 5 5 5 5 Time Null Time Null calibration is performed on channels one two one three Calibration Procedure and one four one at a time using the following procedure o l Verify the CAL FACTOR PROTECT switch is set to UNPROTECTED 2 Connect the Oscilloscope AC Calibrator Output connector to both the Input 1 and Input 2 connectors Note Verify that the BNC cables are not longer than 1 meter and equal in length PROTECTED UNPROTECTED TOP VIEW Figure 5 3 Example Time Null Calibration Setup 3 Perform clear status reset then preset the Oscilloscope 4 Select and start the time null calibration routine During
84. s of shipping damage to any portion of the outer enclosure covers panels etc Inspect the shipping container for damage If the shipping container or cushioning material is damaged it should be kept until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically The contents of the shipment should be as shown in Figure 1 1 Procedures for checking electrical performance are given in Chapter 4 If the contents are incomplete if there is mechanical damage or defect or if the instrument does not pass the electrical performance test notify the nearest Hewlett Packard office If the shipping container is damaged or the cushioning material shows signs of stress notify the carrier as well as the Hewlett Packard office Keep the shipping materials for the carrier s inspection 2 3 Preparation for Use Complete instructions for preparing the HP E1426A Oscilloscope for use are provided in the HP E1426A User s Manual the HP E1400B Mainframe User s Manual and the HP E1405 Command Module User s Manual Procedures include HP E1426A User s Manual Chapter 2 Logical Address Switch Selection Bus Request Grant Level Switch Selection Servant Area Switch Selection Connecting User Inputs Mainframe Installation HP E1405A Command Module User s Manual or applicable command module manual e Interface Cable Connection Addressing the Plug In Modules e System Config
85. stainless steel steel SQuare standing wave ratio synchronize timed slow blow fuse tantalum temperature compensating All abbreviations in the parts list will be in upper case MULTIPLIERS Abbreviation ZO Prefix tera gga mega kilo deka deci centi milli micro nano pico femto atto Multiple 1012 time delay thin film transistor tolerance transistor transistor transistor logic television television interference traveling wave tube micro 1075 used in parts list microfarad used in parts list ultrahigh frequency E unregulated voltampere voltage controlled oscillator VDCW volts dc working used in parts list volts filtered VFO variable frequency oscillator very high frequency volts peak Vp p volts peak to peak volts rms VSWR voltage standing wave ratio voltage tuned oscillator vacuum tube voltmeter volts switched watt with working inverse voltage wirewound without yttrium iron garnet characteristic impedance Table 6 3 Replaceable Parts Designator NONE CPU Printed Circuit Assembly E1426A NONE E1426 69501 CPU Printed Circuit Assembly Exchange E1426 69501 repair limited to replacement of following parts 2110 0699 Fuse Sub Miniature 5A 2110 0699 2110 0699 Fuse Sub Miniature 5A 2110 0699 2110 0699 Fuse Sub Min
86. tall the BNC Cable Assembly na o N A W3 5 BNC CABLE N ASSEMBLY N po di ES dp NG NUT E N Service 8 9 8 11 Repair The following information is provided to assist the technician in repairing the Oscilloscope e Etched Circuits Printed Circuit Boards The etched circuit boards in the Oscilloscope have plated through holes which make a solder path through to both sides of the insulating material Soldering can be done from either side of the board with equally good results When soldering to any circuit board keep in mind the following recommendations 1 Avoid unnecessary component unsoldering and soldering Excessive replacement can result in damage to the circuit board and or adjacent components 2 Do not use high power soldering iron on etched circuit boards A 38 watt soldering iron is recommended Excessive heat may lift a conductor or damage the board Caution Do not use a sharp metal object such as an awl or twist drill in the following step Sharp objects may damage the plated through conductor 3 Use a suction device or wooden toothpick to remove solder from component mounting holes When using a suction device make sure that equipment is properly grounded to prevent electrostatic discharge from damaging MOS devices Electrostatic Discharge ESD Precautions e Electrostatic discharge ESD can cause damage to certain assemblies in the Oscilloscope The damage can range from slight
87. time of 1st positive edge at 0 V MEAS TVOL 0 41 4 Record the measured time that 1st positive edge occurred at 0 V Tl 4 18 Verification Tests Nov 15 1990 Set the HP E1426A controls as follows Time base delay to 8 nsec TIM DEL 8E 9 Measure channel 1 MEAS SOUR 1 Digitize channel 1 DIG 1 Measure time of 1st positive edge at 0 V MEAS TVOL 0 1 Record the measured time that 1st positive edge occurred at 0 V T2 Subtract T1 from T2 The difference should be between 7 890 nsec and 8 110 nsec Repeat steps 2 through 7 for all the HP E1426A DELay values specified in the table below 10 11 14 15 7 890 to 8 110 ns 127 884 to 128 116 ns 399 870 to 400 130 ns 799 850 to 800 150 ns 8 ns 8E 9 128 ns 128 9 400 ns 4E 7 800 ns 8 7 Set the Signal Generator controls as follows Frequency 1 e eeeee e eene nn thee tee sena totes esses esent 1 MHz Output nter e the rennen nnno 150 mVrms Set the HP E1426A controls as follows Perform an autoscale AUT Time base to 2 usec TIM RANG 2E 6 Time base delay to 0 sec TIM DEL 0 Measure channel 1 MEAS SOUR 1 Digitize channel 1 eene DIG CHAN1
88. to peak voltage 1 MHz Set the Power Meter controls as follows Calibration Factor to power sensor 1 MHz value Press dB 2 to set 0 dB reference Calibration Factor to power sensor 500 MHz value Set the Signal Generator frequency to 500 MHz then adjust the output level for a power meter reading as close as possible to 0 0 dB REL Record the reading Power Meter Set the HP 1426 controls as follows Time base to 5 TIM RANG 5 9 Digitize channel 1 DIG 1 Measure peak to peak voltage MEAS VPP Record the measured peak to peak voltage V 500 MHz Calculate the response from the measured results in steps 16 and 20 using the following formula V500MHz response dB 20 910 200910 V1MHz Correct the result from step 21 with any difference in the power meter reading from step 18 using the following formula Observe signs step 21 step 18 Verify result in step 22 is s 3 5 dB Connect the power splitter to next channel being tested Repeat steps 14 through 24 for channels 2 3 and 4 Disconnect test equipment Execute 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 500 Notes Example OUTPUT 70905 CLS OUTPUT 70905 RST W
89. turned the calibration attempt was unsuccessful See Chapter 4 CALibrate Subsystem for more information 7 Disconnect cables and perform Delay Calibration Procedure The following example shows how to perform a vertical calibration The example is written using HP IB select code of 7 primary address of 09 and secondary address of 05 for the Oscilloscope e COMPatible programming language HP Series 200 300 Computer with HP BASIC Execute 10 OUTPUT 70905 CAL SCAL DCAL Selects default calibration routine 20 OUTPUT 70905 CAL SCAL Load default calibration data 30 OUTPUT 70905 CLS Clear status 40 OUTPUT 70905 RST Resets the Oscilloscope to its default state 50 OUTPUT 70905 SUMM PRES Presets the Oscilloscope 60 OUTPUT 70905 CAL SCAL VERT Selects vertical calibration routine 70 OUTPUT 70905 CAL SCAL BCAL Starts vertical calibration routine 80 OUTPUT 70905 SUMM QUES CAL Read calibration event register 90 ENTER 70905 A Enter calibration event register results 100 PRINT A Print calibration event register results 110 END Terminate program Adjustments 5 3 5 4 Delay Cal Delay calibration is performed on channels one through four one at Calibration Procedure time using the following procedure 1 Verify the CAL FACTOR PROTECT switch is set to UNPROTECTED Connect the Oscilloscope AC Calibrator Output connector to the Input 1 connector using a BNC cable Note Verify
90. ulated Difference 0 and 5 V 4 990 Vde 5 010 Vdc Input Resistance Test CHAN 1 500 Voltage Measurement Accuracy Test CHAN 1 40 V Range 16 V Range 8 V Range 4 V Range 1 6 V Range 800 mV Range 400 mV Range 160 mV Range 80 mV Range 40 mV Range 16 mV Range 8 mV Range 4 26 Verification Tests Table 4 1 Verification Test Record Continued ae Para Tost Results No Actual PERFORMANCE VERIFICATION Continued Voltage Measurement Accuracy Test Cont CHAN 2 40 V Range 16 V Range 8 V Range 4V Range 1 6 V Range 800 mV Range 400 mV Range 160 mV Range 80 mV Range 40 mV Range 16 mV Range 8 mV Range CHAN 3 40 V Range 16 V Range 8 V Range 4 V Range 1 6 V Range 800 mV Range 400 mV Range 160 mV Range 80 mV Range 40 mV Range 16 mV Range 8 mV Range CHAN 4 40 V Range 16 V Range 8 V Range 4 V Range 1 6 V Range 800 mV Range 400 mV Range 160 mV Range 80 mV Range 40 mV Range 16 mV Range 8 mV Range Verification Tests 4 27 Table 4 1 Verification Test Record Continued Test Resuits No Actual PERFORMANCE VERIFICATION Continued Offset Accuracy Test CHAN 1 20 V Otfset 19 820 V 9 V Offset 8 923 V 5 V Offset 4 959 V CHAN 2 20 V Offset 19 820 V 9 V Offset 8 923 V 5 V Offset 4 959 V CHAN 3 20 V Offset 19 820 V 9 V Offset 8 923 V 5 V Offset 4 959 V CHAN 4 20 V Offset 19 820 V 9 V Offset 8 923 V 5 V Offset 4 959 V Bandwidth Test CHAN 1 280 mV Full Scale Range
91. unt only COAX coaxial REFERENCE DESIGNATIONS miscellaneous electrical part fuse filter hardware circulator electrical connector stationary portion jack relay coil inductor meter miscellaneous mechanical part electrical connector movable portion plug Q transistor SCR triode thyristor resistor thermistor switch transformer terminal board thermocouple ee test point ABBREVIATIONS COEF COM COMP composition COMPL complete connector cadmium plate cathode ray tube complementary transistor logic continuous wave clockwise D A digital to analog dB decibel dBm decibel referred tol mW dc direct current deg degree temperature interval or difference degree plane angle C e degree Celsius centigrade F degree Fahrenheit K degree Kelvin DEPC deposited carbon DET detector diameter DIA diameter used in parts list DIFF AMPL differential amplifier div division DPDT doublepole double throw DR drive doublesideband diode transistor logic digital voltmeter emitter coupled logic electromotive force coefficient common EDP ELECT EXT electronic data processing electr
92. uration Installation 2 1 2 4 Operating Environment HP E1400B Mainframe User s Manual or applicable mainframe manual e AC Power Selection and Connection Module Installation The operating environment should be within the following limitations Temperature eeeeeene eene nennen anonnnun 0 to 55 Humidity 65 relative 0 to 40 ct 2 5 Storage and Shipment 2 2 2 6 Environment 2 7 Packaging Installation The instrument should be stored in a clean dry environment The following environmental limitations apply to both storage and shipment Temperature ccccccssesccsseesseeenesseene 40 to 75 Humidity lt 65 relative 0 to 40 C Preparation for Packaging Remove any adapters or connectors before packaging instrument for shipping Tagging for Service If the instrument is being returned to Hewlett e Packard for service please complete one of the blue repair tags located at the back of this manual and attach it to the instrument Original Packaging Containers and materials identical to those used in factory packaging are available through Hewlett Packard offices Mark the container FRAGILE to assure careful handling In any correspondence refer to the instrument by model number and full serial number Other Packaging The following general instructions sh
93. y the measured peak to peak voltage into 500 is 400 mV Remove power and disconnect test equipment February 9 1991 Execute 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT Example This program will automatically perform an oscillator output test and print the measurement results The example is written using 70905 CLS 70905 RST 70905 AUT 70905 CHAN1 COUP DC 70905 DIG CHAN1 70905 MEAS SOUR CHAN1 70905 DIG CHAN1 70905 MEAS FREQ ENTER 70905 Freq_ PRINT Freq_ OUTPUT 70905 MEAS VPP ENTER 70905 Vpp dc PRINT Vpp dc OUTPUT OUTPUT OUTPUT 70905 CHAN1 COUP DCF 70905 DIG CHAN1 70905 MEAS VPP ENTER 70905 Vpp dcf PRINT Vpp dcf END February 9 1991 an HP IB select code of 7 primary address of 09 and secondary address of 05 for the HP E1426A COMPatible programming language an HP Series 200 300 Computer with HP BASIC Verificatlon Tests 4 25 Table 4 1 Verification Test Record Hewlett Packard Company Model E1426A Tested by C Size VXI Oscilloscope Module Work Order No Recommended test interval 6 months 1000 hours Recommended next d _ aumum Serial Number Temperature Para Test Results No Actual FUNCTIONAL VERIFICATION Self Test Test passes 0 returned PERFORMANCE VERIFICATION DC Calibrator Test Calc

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