Agilent Technologies 75000 Series Service Manual
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Agilent Technologies 75000 Series Service Manual

Agilent Technologies 75000 Series Service Manual

Summing amplifier/dac module
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  • Page 1 sales@artisantg.com artisantg.com (217) 352-9330 | Click HERE Find the Keysight / Agilent E1446A at our website:...
  • Page 2 Agilent 75000 SERIES C Agilent E1446A Summing Amplifier/DAC Module Service Manual Copyright© Agilent Technologies, Inc., 1993 - 2006 *E1446-90010* E1446-90010 E0706 Manual Part Number: E1446-90010 Printed: July 2006 Edition 2 Rev 2 Printed in Malaysia E0706 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 3 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...
  • Page 4 Warranty This Agilent Technologies product is warranted against defects in materials and workmanship for a period of one (1) year 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 Duration and conditions of warranty for this product may be superseded when the product is integrated into (becomes a part of) other Agilent products.
  • Page 5 REMOVE POWER and do not use the product until safe operation can be verified by service-trained personnel. If necessary, return the product to an Agilent Technologies Sales and Service Office for service and repair to ensure that safety features are maintained.
  • Page 6 IEC 801-3 :1984 / EN50082-1 : 1992 3 V/m IEC 801-4 :1988 / EN50082-1 : 1992 0.5kV signal lines, 1kV power lines The produt was tested in a typical configuration with Agilent Technologies or Hewlett-Packard Company test systems IEC 1010-1:1990+A2:1996 / EN 61010-1:1993 Safety Canada: CSA C22.2 No.
  • Page 7 Agilent 75000 Series C Service Documentation Suggested Sequence to Use Manuals Manual Descriptions Title Description Step-by-step instructions for all aspects of plug-in module, mainframe, and command Series C Installation and module installation. Also contains introductory programming information and Getting Started Guide examples.
  • Page 8 What’s in this Manual Manual Overview This manual shows how to service the Agilent E1446A Summing Amplifier/DAC. See the Agilent E1446A User’s Manual for additional information on installing, configuring, and operating the instrument. Consult the appropriate mainframe manual for information on configuring and operating the mainframe. Manual Content Chap Title...
  • Page 9 Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 10: Table Of Contents

    Contents Chapter 1 - General Information Introduction ........1-1 Safety Considerations .
  • Page 11 Chapter 3 - Replaceable Parts Introduction ........3-1 Exchange Assemblies .

  • Page 12: Chapter 1 - General Information

    General Information Introduction This manual contains information required to test, troubleshoot, and repair the Agilent E1446A C-Size VXI Summing Amplifier/DAC (amplifier). See the Agilent E1446A User’s Manual for additional information. Figure 1-1 shows the Agilent E1446A. This chapter includes the following sections: •...

  • Page 13: Safety Considerations

    Safety This product is a Safety Class I instrument that is provided with a protective Considerations earth terminal when installed in the mainframe. The mainframe, amplifier, and all related documentation should be reviewed for familiarization with safety markings and instructions before operation or service. Refer to the WARNINGS page (page iii) in this manual for a summary of safety information.
  • Page 14 WARNING REMOVE POWER IF POSSIBLE. Some procedures in this manual may be performed with power supplied to the mainframe while protective covers are removed. Energy available at many points may, if contacted, result in personal injury. (If maintenance can be performed without power applied, the power should be removed.) USING AUTOTRANSFORMERS.

  • Page 15: Inspection/Shipping

    Inspection/ This section describes initial (incoming) inspection and shipping guidelines Shipping for the amplifier. Initial Use the steps in Figure 1-2 as guidelines to perform initial inspection of the amplifier. Inspection WARNING To avoid possible hazardous electrical shock, do not perform electrical tests if there are signs of shipping damage to the shipping container or to the instrument.
  • Page 16 • Seal the shipping carton securely • Mark the shipping carton FRAGILE Ship the Module to Agilent Technologies • Place address label on shipping carton * * • Send carton to Agilent Technologies * We recommend you use the same shipping materials as those used in factory packaging (available from Agilent Technologies).

  • Page 17: Environment

    User’s Manual. These specifications are the performance standards or limits Specifications against which the instrument may be tested. Amplifier Figure 1-4 shows Agilent Technologies serial number structure. Amplifiers covered by this manual are identified by a serial number prefix listed on the Serial Numbers title page.

  • Page 18: Recommended Test Equipment

    Recommended Table 1-1 lists the test equipment recommended for testing and servicing the Test Equipment amplifier. Essential requirements for each piece of test equipment are described in the Requirements column. Table 1-1. Recommended Test Equipment Instrument Requirements Recommended Use* Model Controller, GPIB GPIB compatibility as defined by IEEE HP 9000 Series 300...
  • Page 19 1-8 General Information Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 20: Chapter 2 - Verification Tests

    Verification Tests Introduction The three levels of test procedures described in this chapter are used to verify that the Agilent E1446A: • is fully functional (Functional Verification) • meets selected testable specifications (Operation Verification) • meets all testable specifications (Performance Verification) WARNING Do not perform any of the following verification tests unless you are a qualified, service-trained technician and have read the...

  • Page 21: Verification Test Examples

    Verification Test Each verification test procedure includes an example program that performs the test. All example programs assume the following Examples configuration: • Controller is an HP 9000 Series 200/300 computer • Programming language is BASIC • Amplifier address is 70911 (logical address is 88) •...

  • Page 22: Functional Verification

    Functional The purpose of this test is to verify communication with the mainframe Verification or command module. No attempt is made to verify that the amplifier is meeting specifications. Functional Verification for the amplifier is accomplished by performing the Self-Test described below. Self-Test Procedure 1.

  • Page 23: Operation Verification

    Operation Operation Verification is a subset of the Performance Verification tests Verification that follow. For the amplifier, Operation Verification consists of the following tests: • Test 2-3: Low-level Outputs Test • Test 2-4: Main Output Test • Test 2-5: Offset DAC Test Performance The procedures in this section are used to test the amplifier’s electrical Verification...

  • Page 24: Test 2-1: Input Attenuator Test

    Test 2-1: Input Attenuator Test Description The purpose of this test is to verify that the amplifier meets its specifications for input attenuator accuracy. • Equipment Setup Set Source to: DCV • Set DMM to: DCV, autorange • Connect the DMM to the amplifier as shown in Figure 2-1 Figure 2-1.
  • Page 25 5. Set the amplifier Input1 attenuation to 1 dB: INP1:ATT 1 6. Measure a + 0.5 VDC signal and a -0.5 VDC signal as in step 4. Average the two readings: Positive Reading (V ) − Negative Reading ( V) Averaged Reading (V) = 7.
  • Page 26 Example Program 10 ! RE-STORE "INPUT_ATTN" !---------- Set up I/O path ---------- ASSIGN @Amp TO 70911 ASSIGN @Dmm TO 722 !---------- Initialize variables ---------- Vin= .5 100 !---------- Set up DMM ---------- 110 DISP "Connect DMM to Diff + Output, then press ’Continue’" 120 PAUSE 130 CLEAR SCREEN 140 OUTPUT @Dmm;"PRESET NORM;DCV;RANGE AUTO"...
  • Page 27 Result_db= 20* LGT(Ave_rdg/Ref_level) Result_db= PROUND(Result_db,-4) PRINT USING "4X,DD,16X,MDD.4D";Attn,Result_db NEXT I !Next attenuation PRINT PRINT 500 NEXT Ch !Next input 510 ! 520 Quit: ! 530 ASSIGN @Amp TO * 540 ASSIGN @Dmm TO * 550 STOP 560 ! 570 Measure: ! 580 !Measure positive signal 590 DISP "Set Source to "&VAL$(Vin)&"...

  • Page 28: Test 2-2: Output Attenuator Test

    Test 2-2: Output Attenuator Test Description The purpose of this test is to verify that the amplifier meets its specifications for output attenuator accuracy. • Equipment Setup Set Source to: DCV • Set DMM to: DCV, autorange • Connect the DMM to the amplifier as shown in Figure 2-2 Figure 2-2.
  • Page 29 4. Set the Source to + 0.5 VDC and measure the amplifier output with the DMM. Repeat with the Source set to -0.5 VDC. Average the two readings to get a reference level: Positive Reading (V ) − Negative Reading ( V) Reference Level (V) = 5.
  • Page 30 Example Program 10 ! RE-STORE "OUTPUT_ATTN" !---------- Set up I/O path ---------- ASSIGN @Amp TO 70911 ASSIGN @Dmm TO 722 !---------- Initialize variables ---------- Vin= .5 100 !---------- Set up DMM ---------- 110 DISP "Connect DMM to Main Output, then press ’Continue’" 120 PAUSE 130 CLEAR SCREEN 140 OUTPUT @Dmm;"PRESET NORM;DCV;RANGE AUTO"...
  • Page 31 Result_db= 20* LGT(Ref_level/Ave_rdg) Result_db= PROUND(Result_db,-4) PRINT "Reading (dB) = ";Result_db PRINT PRINT 470 NEXT Ch !Next input 480 ! 490 Quit: ! 500 ASSIGN @Amp TO * 510 ASSIGN @Dmm TO * 520 STOP 530 ! 540 Measure: ! 550 !Measure positive signal 560 DISP "Set Source to "&VAL$(Vin)&"...

  • Page 32: Test 2-3: Low-Level Outputs Test

    Test 2-3: Low-level Outputs Test Description The purpose of this test is to verify that the amplifier meets its accuracy specifications for low-level (differential) outputs. • Equipment Setup Set Source to: DCV • Set DMM to: DCV, 10 V range Figure 2-3.
  • Page 33 Table 2-1. Low-level Outputs Test Connect DMM to: Connect Source to: Input Voltage (VDC) Expected Output (VDC) Diff+ Input1 Diff+ Input1 0.75 Diff+ Input1 -0.75 -1.5 Diff+ Input2 Diff- Input1 Diff- Input1 0.75 Diff- Input1 -0.75 -1.5 Diff- Input2 Example Program 10 ! RE-STORE "LL_OUT"...
  • Page 34 END IF DISP "Connect DMM to "&Output$&", then press ’Continue’" PAUSE DISP PRINT TAB(23);Output$ PRINT PRINT USING "5A,6X,9A,4X,11A,4X,11A";"Input","Input (V)","Nominal (V)","Reading (V)" PRINT FOR I= 1 TO 4 Input_v= Nominal(I)/(Gain* ((-1)^ (Output$= "DIFF-"))) !Test connections IF I= 1 OR I= 4 THEN DISP "Connect Source to "&Input$(I)&", then press ’Continue’"...

  • Page 35: Test 2-4: Main Output Test

    Test 2-4: Main Output Test Description The purpose of this test is to verify that the amplifier meets its accuracy specifications for the main output. • Equipment Setup Set Source to: DCV • Set DMM to: DCV, autorange • Connect the DMM to the amplifier as shown in Figure 2-4 Figure 2-4.
  • Page 36 Example Program 10 ! RE-STORE "MAIN_OUT" DIM Nominal(1:2) !---------- Set up I/O path ---------- ASSIGN @Amp TO 70911 ASSIGN @Dmm TO 722 !---------- Initialize variables ---------- Gain= 20.0 100 RESTORE Data_nominal 110 READ Nominal(* ) 120 ! 130 !---------- Set up DMM and Source ---------- 140 OUTPUT @Dmm;"PRESET NORM;DCV;RANGE AUTO"...
  • Page 37 GOSUB Measure PRINT USING "1X,SD.3D,9X,SDD.3D,7X,SDD.5D";Input_v,Nominal(I),Rdg NEXT I PRINT PRINT 430 NEXT Ch 440 ! 450 Quit: ! 460 ASSIGN @Amp TO * 470 ASSIGN @Dmm TO * 480 STOP 490 ! 500 Measure: ! 510 !Set Source 520 DISP "Set Source to "&VAL$(Input_v)&" VDC, then press ’Continue’" 530 PAUSE 540 DISP 550 !

  • Page 38: Test 2-5: Offset Dac Test

    Test 2-5: Offset DAC Test Description The purpose of this test is to verify that the amplifier meets its offset DAC accuracy specifications. • Equipment Setup Set DMM to: DCV, autorange • Connect the DMM to the amplifier as shown in Figure 2-5 Figure 2-5.
  • Page 39 NOTE Because the DMM is a high-impedance load, the reading should be equal to twice the amplifier’s offset voltage setting. Table 2-2. Offset DAC Test Points Offset Voltage Expected reading (VDC) (VDC) -10.0 -20.0 -5.0 -10.0 10.0 9.9996 19.9992 Example Program 10 ! RE-STORE "OFFSET_DAC"...
  • Page 40 210 !---------- Perform test ---------- 220 PRINT USING "11A,8X,11A";"Nominal (V)","Reading (V)" 230 PRINT 240 ! 250 FOR I= 1 TO 5 Dac_v= (Nominal(I)/2.0) GOSUB Measure Result= PROUND(Rdg,-6) PRINT USING "1X,SDD.4D,11X,SDD.5D";Nominal(I),Result 300 NEXT I 310 ! 320 Quit: ! 330 ASSIGN @Amp TO * 340 ASSIGN @Dmm TO * 350 STOP 360 !

  • Page 41: Test 2-6: Bandwidth Test

    Test 2-6: Bandwidth Test Description The purpose of this test is to verify that the amplifier meets its bandwidth specifications. • Equipment Setup Set Spectrum Analyzer’s tracking generator to -10 dBm (nominal) Figure 2-6. Bandwidth Test Setup Test Procedure 1. Reset the amplifier: * RST;* CLS Reset amplifier and clear status registers...
  • Page 42 5. Set the Spectrum Analyzer as follows: • Resolution bandwidth: 30 Hz • Video bandwidth: 100 Hz • Sweep mode: Manual • Manual frequency: 100 Hz 6. Note the amplitude reading at 100 Hz. This value will be used as the reference level in step 8.
  • Page 43 Example Program 10 ! RE-STORE "BANDWIDTH" DIM Output$(1:3)[10] !---------- Set up I/O paths ---------- ASSIGN @Amp TO 70911 !---------- Initialize variables ---------- Max_freq= 4.0E+ 7 100 RESTORE Data_output 110 READ Output$(* ) 120 ! 130 !---------- Set up amplifier ---------- 140 OUTPUT @Amp;"* RST;* CLS"...
  • Page 44 PRINT " Sweep Mode: Manual" PRINT " Manual Frequency: 100 Hz" INPUT "Enter amplitude at 100 Hz (in dBm):",Ref_level CLEAR SCREEN GOSUB Meas_bw PRINT "Bandwidth (Hz) = "&VAL$(Bandwidth) DISP "Press ’Continue’ when ready" PAUSE CLEAR SCREEN NEXT I 530 NEXT Ch 540 ! 550 Quit: ! 560 ASSIGN @Amp TO *...

  • Page 45: Performance Test Record

    Performance Table 2-4, Performance Test Record for the Agilent E1446A Amplifier, is a Test Record form you can copy and use to record performance verification test results for the amplifier. Table 2-4 shows amplifier accuracy, measurement uncertainty, and test accuracy ratio (TAR) values. Amplifier Test Test limits are defined using the specifications in Appendix A of the Agilent E1446A User’s Manual.
  • Page 46 Table 2-4. Performance Test Record for the Agilent E1446A (Page 1 of 4) Test Facility: Name _________________________________________ Report No. _____________________________________ Address ________________________________________ Date ___________________________________________ City/State _______________________________________ Customer ______________________________________ Phone _________________________________________ Tested by _____________________________________ Model ________________________________________ Ambient temperature __________________________ Serial No. ______________________________________ Relative humidity _______________________________% Options _______________________________________...
  • Page 47 Table 2-4. Performance Test Record for the Agilent E1446A (Page 2 of 4) Model ________________________________ Report No. _______________________________ Date _________________ Test Equipment Used: Description Model No. Trace No. Cal Due Date 1. _________________________________ _______________ _______________ _______________ 2. _________________________________ _______________ _______________ _______________ 3.
  • Page 48 Table 2-4. Performance Test Record for the Agilent E1446A (Page 3 of 4) Model ________________________________ Report No. _______________________________ Date _________________ Test Measured Meas Description Minimum Reading Maximum Uncert Test 2-1. Input Attenuator Test (Values in dB) Input1: 1 dB attenuator -1.1 ____________ -0.9...
  • Page 49 Table 2-4. Performance Test Record for the Agilent E1446A (Page 4 of 4) Model ________________________________ Report No. _______________________________ Date _________________ Test Measured Meas Description Minimum Reading Maximum Uncert Test 2-4. Main Output Test (Values in Vdc) Input1: 1 V input 19.8 ____________ 20.2...

  • Page 50: Chapter 3 - Replaceable Parts

    Assemblies required for spare parts stock must be ordered by the new assembly part number. Ordering To order a part listed in Table 3-1, specify the Agilent Technologies part number and the quantity required. Send the order to your nearest Agilent Information Technologies Sales and Support Office.
  • Page 51 Table 3-1. Agilent E1446A Replaceable Parts Reference Agilent Part Part Description Mfr. Mfr. Part Designator Number Code Number NEW/EXCHANGE ASSEMBLIES E1446-66201 E1446A (NEW) 28480 E1446-66201 E1446-69201 E1446A (EXCHANGE) 28480 E1446-69201 E1446-66501 PRINTED CIRCUIT ASSEMBLY 28480 E1446-66501 A1CR301 1990-0966 LED-LAMP LUM-INT=3MCD IF=20MA-MAX BVR=5V 28480 HLMP-5050 GRN LENS...
  • Page 52 AMP INC HARRISBURG, PA US 17111 06776 47150 ROBINSON NUGENT INC NEW ALBANY, IN US 28480 AGILENT TECHNOLOGIES - CORPORATE PALO ALTO, CA US 94304 30817 INSTRUMENT SPECIALTIES INC DEL WATER GAP, PA US 18327 46384 PENN ENGINEERING & MFG CORP...
  • Page 53 Figure 3-1. Agilent E1446A Replaceable Parts 3-4 Replaceable Parts Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 54: Chapter 4 - Service

    Service notes and service literature for the amplifier may be available through Agilent Technologies. For information, contact your nearest Agilent Technologies Sales and Support Office. A list of Sales and Support Offices can be found at the end of this manual.

  • Page 55: Troubleshooting Techniques

    Troubleshooting To troubleshoot an Agilent E1446A problem, you should first identify Techniques the problem, and then isolate the cause to a replaceable part. Identifying Amplifier problems can be divided into three general categories: the Problem • Operator errors • Catastrophic failures •...

  • Page 56: Disassembly

    Checking for Heat Damage Inspect the amplifier for signs of abnormal internally generated heat such as discolored printed circuit boards or components, damaged insulation, or evidence of arcing. If there is damage, do not operate the amplifier until you have corrected the problem. Checking Switches/Jumpers Verify that the logical address setting is set correctly (factory set at 88).

  • Page 57: Repair/Maintenance Guidelines

    Repair/ This section provides guidelines for repairing and maintaining the Maintenance Agilent E1446A amplifier, including: Guidelines • ESD precautions • Soldering printed circuit boards • Post-repair safety checks Electrostatic discharge (ESD) may damage static sensitive devices in the Agilent E1446A amplifier. This damage can range from slight parameter Precautions degradation to catastrophic failure.

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E1446a54170-154170-2

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