Keysight Technologies 53147A Service Manual
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Keysight Technologies 53147A Service Manual

Keysight Technologies 53147A Service Manual

Microwave frequency counter, power meter, dvm
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Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com
Keysight 53147A/148A/149A
Microwave Frequency
Counter/Power Meter/DVM
Assembly Level
Service Guide

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Summary of Contents for Keysight Technologies 53147A

  • Page 1 Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - TestEquipmentDepot.com Keysight 53147A/148A/149A Microwave Frequency Counter/Power Meter/DVM Assembly Level Service Guide...
  • Page 2 27.401 or DFAR 227.7103-5 (c), as could result in personal injury or death. applicable in any technical data. Do not proceed beyond a WARNING notice until the indicated conditions are fully understood and met. Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide...

  • Page 3: Serial Prefix Number

    Serial Prefix Number This guide describes how to service the Keysight 53147A, 53148A, and 53149A. The information in this guide applies to instruments having the number prefix listed below, unless accompanied by a “Manual Updating Changes” package indicating otherwise. SERIAL PREFIX NUMBER:...
  • Page 4 Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide...

  • Page 5: Safety Symbols

    Caution, risk of danger (refer to this manual for specific Warning or Caution Caution, risk of electric shock information) Earth (ground) terminal Frame or chassis (ground) terminal Alternating current (AC) Direct current (DC) Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide...

  • Page 6: Safety Considerations

    (INSIDE OR OUTSIDE THE PRODUCT’S CIRCUITRY) 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 SUFFICEIENT PROTECTION.) Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide...

  • Page 7: Acoustic Noise Emissions

    When the product is tested with 8kV AD, 4kV CD and 4kV ID according to IEC801-2, a system error may occur that may affect measurement data made during these disturbances. After these occurrences, the system self-recovers without user intervention. Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide...

  • Page 8: Waste Electrical And Electronic Equipment (Weee) Directive

    With reference to the equipment types in the WEEE directive Annex 1, this instrument is classified as a “Monitoring and Control Instrument” product. The affixed product label is as shown below. Do not dispose in domestic household waste. Keysight 53147A, 53148A, and 53149A Assembly Level Service Guide...

  • Page 9: Table Of Contents

    ..........28 Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 10 ..........56 Returning the Instrument to Keysight Technologies for Service .
  • Page 11 ......112 Accessories and Miscellaneous Items ..... . .112 Backdating Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 12 ........... 131 Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 13: List Of Figures

    ......103 Figure 3-8 Removing the Power Supply ....104 Figure 4-1 Keysight 53147A/148A/149A Exploded View — Internal Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 14 ........113 Figure 4-2 Keysight 53147A/148A/149A Exploded View — Cabinet and External Parts .

  • Page 15: List Of Tables

    Keysight 53147A/148A/149A Accessories and Miscella- neous Items ......119 Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 16 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 17 Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Performance Tests - Verifying Specifications Introduction Equipment Required Operational Verification Complete Performance Tests Test 1: Channel 1 Frequency Sensitivity Test 2: Channel 2 Frequency Sensitivity Test 3: Power Measurement...

  • Page 18: Performance Tests - Verifying Specifications

    Performance Tests - Verifying Specifications Introduction This chapter provides procedures to test the electrical performance of the Keysight 53147A, 53148A, and 53149A. These procedures are based on the specifications in Chapter 6, “Specifications”. Two types of testing are provided: – Operational Verification –...

  • Page 19: Recommended Calibration Cycle

    The results of the Operational Verification and the Complete Performance Tests should be recorded on a copy of the Performance Test Record, located at the end of the “Complete Performance Tests” section in this chapter. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 20: Equipment Required

    1, 3, 10, 30, and 100 mW DC to 50 GHz Keysight 8490D 20 dB Attenuator P, T 2.4 mm (m) to 2.4 mm (f) (Opt. 020) DC to 50 GHz Power Splitter Keysight 11667C/D P, T 2.4 mm (f3x) Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 21: Recommended Test Equipment And Accessories

    Keysight 11900B [a] Equivalent equipment can be substituted for all instruments and accessories. [b] OV = Operational Verification P = Performance Tests C = Calibration T = Troubleshooting [c] One supplied with Keysight 53147A/48A/49A Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 22: Operational Verification

    These procedures should be followed in the order in which they appear. Power-On Self Tests This test is appropriate for the Keysight 53147A, 53148A, and 53149A. NOTE 1 Inspect the instrument for damage. 2 Make sure no cables are connected to the instrument’s inputs.

  • Page 23: 10 Mhz Test

    3 Verify that Ch 1 is displayed in the upper-left corner of the display. 4 Verify that the display reads 10,000,000 Hz. 5 Mark Pass or Fail in the “Performance Test Record” on page 51, “Test 2”. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 24: Run Self Test

    30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize. – These tests are appropriate for the Keysight 53147A, 53148A, and 53149A. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 25: Figure 1-1 External Timebase Test Setup

    8 Press the right-arrow key once. INT begins to flash off and on. 9 Press the up- or down-arrow key once. INT changes to EXT. 10 Press the Enter key. 11 Press the Chan Select key once to select the CHANNEL 1 input connector. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 26: Power Meter Test

    30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize. – These tests are appropriate for the Keysight 53147A, 53148A, and 53149A. 1 Connect one end of the Keysight 11730A cable (supplied with instrument) to the Power Meter INPUT connector on the front panel of the Keysight 53147A, 53148A, or 53149A.
  • Page 27 9 Verify that the Counter displays a reading of 0 dBm ± .02 dB. 10 Mark Pass or Fail for “Test 5” in the “Performance Test Record” on page 51. 11 Disconnect the test setup. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 28: Dvm Test

    30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize. – These tests are appropriate for the Keysight 53147A, 53148A, and 53149A. 1 Set the output of the E3640A DC Power Supply to +25 VDC.
  • Page 29 6 Disconnect the test leads from the Keysight E3640A DC Power Supply. Be careful not to disturb the voltage setting. 7 Connect the test leads to the Keysight 53147A/48A/49A (be sure to observe the correct polarity). 8 Press the Display DVM key on the Keysight 53147A/48A/49A front panel.

  • Page 30: Complete Performance Tests

    Performance Tests - Verifying Specifications Complete Performance Tests The Complete Performance Tests verify the specifications of the Keysight 53147A/ 148A/149A listed in Chapter 6, “Specifications”. All of these tests can be performed without opening the instrument. Table 1-3 lists a summary of the performance tests.

  • Page 31: Test 1: Channel 1 Frequency Sensitivity

    30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize. – These tests are appropriate for the Keysight 53147A, 53148A, and 53149A. – If the Keysight 3325A/B Synthesizer or the Keysight 83650B Synthesizer...

  • Page 32: Figure 1-3 10 Hz To 20 Mhz Frequency Sensitivity Test Setup

    9 If all of the frequency values you recorded for “Test 1a” are correct, mark Pass in the Performance Test Record for “Test 1a”. If any of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 33: Test 1B: 50 Mhz To 125 Mhz Frequency Sensitivity

    Keysight 10100C Feedthrough Terminator on the Counter’s CHANNEL 1 connector. 3 Connect the Keysight 11904A 2.92 mm (m) to 2.4 mm (m) Adapter to the Keysight 1250-2015 Adapter. 4 Connect the Keysight 8490D 20 dB Attenuator to the Keysight 11904A Adapter. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 34 – Do not disconnect the rest of the test setup, as these connections are also NOTE used in the Channel 2 Frequency Sensitivity test. – Do not turn off the instrument. Turning the instrument off and back on resets the reference oscillator (REF OSC) selection to internal (INT). Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 35: Test 2: Channel 2 Frequency Sensitivity

    30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize. – This test is appropriate for the Keysight 53147A, 53148A, and 53149A. 1 Connect the Keysight 11904D 2.92 mm (m) to 2.4 mm (f) Adapter to the Counter’s CHANNEL 2 input connector (refer to...

  • Page 36: Figure 1-5 50 Mhz To 20 Ghz Frequency Sensitivity Test Setup

    “Test 2a”. Don’t forget to change the power level when performing the 300 MHz and 19 GHz tests (53147A, 53148A, and 53149A) and the 16 GHz and 19 GHz tests (53149A only). It may be necessary to repeat Step 5.

  • Page 37: Test 2B: 22 Ghz To 26.5 Ghz Frequency Sensitivity

    6 If all of the frequency values you recorded for “Test 2b” are correct, mark Pass in the Performance Test Record for “Test 2b”. If any of the frequency readings you recorded are incorrect, mark Fail in the Performance Test Record. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 38: Test 2C: 30 Ghz To 46 Ghz Frequency Sensitivity

    Power Splitter. These connections are reused in the following tests. – Do not turn off the instrument. Turning the instrument off and back on resets the reference oscillator (REF OSC) selection to internal (INT). Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 39: Test 3: Power Measurement

    Power Measurement Accuracy Test Setup 2 Press the Reset/Local key on the Keysight 53147A, 53148A, or 53149A. 3 Press the Shift + dBm/W key on the Keysight 53147A, 53148A, or 53149A to set the Power Meter to display readings in Watts, mW, and/or µW.
  • Page 40 0.00 ±0.06 µW. 6 Change the Range Calibrator’s FUNCTION switch to CALIBRATE. 7 Press the Cal key on the Keysight 53147A, 53148A, or 53149A. Wait for the Power Meter to complete calibration. 8 Verify that the Keysight 53147A, 53148A, or 53149A display reads 1.000 ±0.006 mW.

  • Page 41: Range Calibrator Settings And Expected Results

    “Performance Test Record” page 51. 11 Press the Shift + dBm/W key on the Keysight 53147A, 53148A, or 53149A again to set the Power Meter to display readings in dBm. 12 Verify that the annunciator changes to dBm and that the indication is within 20.00 ±00.04 dBm with the Range Calibrator’s RANGE switch in the...

  • Page 42: Test 4: Power Reference Oscillator Frequency

    – This procedure specifies the Keysight 53150A for measuring the frequency output of the 53147A/48A/49A’s power reference oscillator. If the 53147A/ 48A/49A’s Frequency Counter is known to be in calibration (see “Test 1:...

  • Page 43: Figure 1-7 Reference Oscillator Frequency Adjustment Setup

    NOTE calibration and then turned back off when calibration is complete. Setting PWR REF in the 53147A/148A/149A’s menu to ON turns the power reference oscillator on, and it remains on until the PWR REF menu setting is returned to OFF. When you calibrate the Power Meter with PWR REF set to ON, the power reference oscillator remains on after calibration is complete.

  • Page 44: Test 5: Power Meter Reference Level

    Keysight 8481A Power Sensor Keysight 11730A Power Sensor Cable (supplied with 53147A/48A/49A) – To ensure that the test results are valid, the Keysight 53147A/48A/49A and NOTE the test equipment should be powered on for at least 30 minutes prior to beginning the tests.

  • Page 45: Figure 1-9 Power Meter Reference Level Test Setup

    7 Record the power reading shown on the Keysight E4418B Power Meter for “Test 5” in the “Performance Test Record” on page 51. 8 Mark Pass or Fail for “Test 5” in the Performance Test Record. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 46: Power Meter Reference Level: Method 2

    This allows the internal temperatures of the equipment to stabilize. – This test is appropriate for the Keysight 53147A, 53148A, and 53149A. 1 Turn the Keysight 432A Power Meter off. Do not turn it on until instructed to do...

  • Page 47: Figure 1-11 Power Meter Reference Level Test Setup

    Performance Tests - Verifying Specifications Do not use a cable between the Thermistor Mount and the 53147A/148A/149A NOTE Power Meter OUTPUT connector. Connect the Thermistor Mount directly to the OUTPUT connector. Key sight 478A-H75 or 478A-H76 Thermistor Mount (connected to P ower...
  • Page 48 NOTE calibration and then turned back off when calibration is complete. When PWR REF in the 53147A/148A/149A’s menu is set to ON, the power reference oscillator is turned on, and it is left on after calibration. 18 Observe the reading on the Multimeter, and keep a record of this value as V 19 Disconnect the Multimeter’s negative test lead from the 432A Power Meter’s...
  • Page 49 = Power reference oscillator output level = previously recorded value comp = previously recorded value = previously recorded value = previously recorded value Calibration Factor = value for thermistor mount at 50 MHz (traceable to NIST) Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 50 22 Verify that P rf is between 0.988 mW and 1.012 mW. 23 Record the value for P rf in the “Performance Test Record” on page 51. 24 Mark Pass or Fail for “Test 5” in the Performance Test Record. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 51: Performance Test Record

    20 MHz @ 25 mV rms (–19.2 dBm) _____________________ Channel 1 Frequency Sensitivity ❏ ❏ 50 MHz 50 MHz @ 25 mV rms (–19.2 dBm) _____________________ 125 MHz 125 MHz @ 25 mV rms (–19.2 dBm) _____________________ Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 52: Performance Test Record

    Channel 2 Frequency Sensitivity 53147A 53148A 53149A ❏ ❏ _____________________ 30 GHz –23 dBm _____________________ 34 GHz " _____________________ 40 GHz " _____________________ 42 GHz –17 dBm 44 GHz " _____________________ 46 GHz " _____________________ Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 53: Performance Test Record

    Power Reference Frequency: ❏ ❏ 50.0 MHz ± 1% (49.5 MHz to 50.5 MHz) 50.0 MHz _____________________ Power Reference Level: ❏ ❏ 1.0 mW ± 1.2% 0.988 mW to 1.012 mW 1.0 mW (0.00 dBm) _____________________ Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 54 Performance Tests - Verifying Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 55: Service

    Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Service Introduction Returning the Instrument to Keysight Technologies for Service Calibration Procedures Pre-Troubleshooting Information Troubleshooting the Instrument...

  • Page 56: Introduction

    Service Introduction This chapter provides service information for your Keysight 53147A/148A/149A. It is divided into four major sections: – “Returning the Instrument to Keysight Technologies for Service” (page 57). This section provides you with step-by-step instructions on how to return the instrument for service.

  • Page 57: Returning The Instrument To Keysight Technologies For Service

    Returning the Instrument to Keysight Technologies for Service Providing Repair Information Before shipping the instrument to an Keysight Technologies office for service or repair, call the nearest Keysight Sales Office to make arrangements. Then, tag and package the Keysight 53147A/148A/149A for shipment.

  • Page 58: Packing The Instrument In The Original Packaging Materials

    4 Add a layer of shock-absorbing material that is 3 to 4 inches (70 to 100 mm) thick around all sides of the instrument cushion it and to prevent it from moving within the container 5 Seal the shipping container securely. 6 Mark the shipping container FRAGILE. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 59: Calibration Procedures

    BNC (m) to BNC (m) Keysight 10503 series Adapter Type N (m) to BNC (f) Keysight E9635A [a] Equivalent equipment can be substituted for all instruments and accessories. [b] One supplied with Keysight 53147A/148A/149A Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 60: 10 Mhz Timebase Calibration

    10 MHz Timebase Calibration Equipment Required 10 MHz Frequency Reference Standard Keysight 11730A Power Sensor Cable (provided with 53147A/148A/149A) Keysight 10503 series BNC (m) to BNC (m) Coaxial Cable Small, non-metallic adjustment tool for slotted screw heads The instrument and the test equipment must be powered on for at least NOTE 30 minutes prior to beginning this calibration procedure.

  • Page 61: Figure 2-1 Calibrating The 10 Mhz Frequency Reference Oscillator

    5 Turn the calibration screw clockwise to increase the Counter’s reading or counter-clockwise to decrease the reading until the frequency value displayed on the Counter’s front panel is exactly 10,000,000 Hz. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 62: Power Reference Oscillator Frequency Calibration

    2 Remove the shroud from the Keysight 53147A/148A/149A (see “Removing the Shroud” on page 96). 3 Position the Keysight 53147A/148A/149A on its right side so that you have access to the front panel and the left side of the main circuit board (see Figure 2-2).

  • Page 63: Figure 2-2 Reference Oscillator Frequency Adjustment Setup

    Work very carefully when the shroud is removed, and avoid all unnecessary contact with the internal components. 5 Turn on the Keysight 53147A/148A/149A and then wait for at least 30 minutes to allow the internal temperature of the instrument to stabilize.
  • Page 64 NOTE calibration and then turned back off when calibration is complete. Setting PWR REF in the 53147A/148A/149A’s menu to ON turns the power reference oscillator on, and it remains on until the PWR REF menu setting is returned to OFF. When you calibrate the Power Meter with PWR REF set to ON, the power reference oscillator remains on after calibration is complete.

  • Page 65: Figure 2-3 Power Reference Oscillator Adjustment Locations

    Power Reference Oscillator Adjustment Locations 11 Set the frequency to 50.0 MHz ± 0.05 MHz (49.95 MHz to 50.05 MHz). Turn the adjustment tool counter-clockwise to increase the frequency or clockwise to decrease the frequency. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 66: Power Reference Oscillator Level Adjustment

    Keysight E4418B Power Meter Keysight 8481A Power Sensor Keysight 11730A Power Sensor Cable (supplied with 53147A/148A/149A) – To ensure that the results are valid, the Keysight 53147A/148A/149A and the NOTE test equipment should be powered on for at least 30 minutes prior to beginning the calibration procedure.

  • Page 67: Figure 2-5 Power Meter Reference Level Test Setup

    2-3) until the power level is as close to 1.000 mW as possible (the level must be between 0.988 mW and 1.012 mW). Turn the adjustment tool counter-clockwise to increase the power level or clockwise to decrease the power level. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 68: Figure 2-6 Keysight 8120-1082 Power Sensor Cable End View

    Keysight 478A-H75 or 478A-H76 Thermistor Mount Keysight 34401A Digital Multimeter Keysight 8120-1082 Power Sensor Cable To ensure that the results are valid, the Keysight 53147A/148A/149A and the NOTE test equipment should be powered on for at least 30 minutes prior to beginning the calibration procedure.

  • Page 69: Figure 2-7 Power Meter Reference Level Calibration Setup

    Service Do not use a cable between the Thermistor Mount and the 53147A/148A/149A NOTE Power Meter OUTPUT connector. Connect the Thermistor Mount directly to the OUTPUT connector. Key sight 478A-H75 or 478A-H76 Thermistor Mount (connected to P ower Key sight 432A...
  • Page 70 NOTE calibration and then turned back off when calibration is complete. Setting PWR REF in the 53147A/148A/149A’s menu to ON turns the power reference oscillator on, and it remains on until the PWR REF menu setting is returned to OFF. When you calibrate the Power Meter with PWR REF set to ON, the power reference oscillator remains on after calibration is complete.
  • Page 71 Service 21 Calculate the output level of the 53147A/148A/149A’s power reference oscillator (P ) using the following formula: – V ) + V – V comp 4R (Calibration Factor) Where: = Power reference oscillator output level = previously recorded value...
  • Page 72 22 Use a non-metallic, slot-type adjustment tool to adjust the setting of R98 on the main circuit board (see Figure 2-3) until P is between 0.988 mW and 1.012 mW. Turn the adjustment tool counter-clockwise to increase the power level or clockwise to decrease the power level. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 73: Dvm Calibration

    A computer with an RS-232 serial interface and terminal software Keysight 53150-60215 RS-232 Serial Cable Keysight 6613C or 6614C Precision DC Power Supply To ensure that the results are valid, the Keysight 53147A/148A/149A and the NOTE Keysight 6613C/6614C Precision DC Power Supply should be powered on for at least 30 minutes prior to beginning the calibration procedure.

  • Page 74: Figure 2-8 Dvm Tests Main Menu

    + output), or reverse the polarity of the power outputs. 13 Type “y”. 14 When the calibration program displays: Update from old 10974.01 to new 10974.96 Cal. Constant? (y/n) y type “y” (the values in the display line above are simulated). Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 75 15 When the calibration program redisplays its menu (as shown in Figure 2-8), type “e” to exit the program. 16 Close the terminal program and disconnect the serial cable from the computer and the instrument. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 76: Pre-Troubleshooting Information

    Any maintenance and repair of the opened instrument under voltage should be avoided as much as possible and, if necessary, should be carried out only by a skilled person who is aware of the hazards involved (for example, fire and electric shock). Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 77: Recommended Test Equipment

    1-1. Repair Considerations Electrostatic Discharge Electronic components and assemblies in the Keysight 53147A/148A/149A can be permanently degraded or damaged by electrostatic discharge. Use the following precautions when servicing the instrument: 1 ENSURE that static-sensitive devices or assemblies are serviced at static-safe work stations providing proper grounding for service personnel.

  • Page 78: After Service Considerations

    The minimum acceptable resistance is 2 MΩ. Replace any component which results in a failure. Product Performance Checks After replacement of any functional assembly, perform the operational verification test in Chapter 1 of this guide, “Performance Tests - Verifying Specifications” Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 79: Assembly Identification And Location

    Service Assembly Identification and Location The assembly number, name, and Keysight part number of each of the Keysight 53147A, 53148A, and 53149A assemblies are listed in Table 2-2. Figure 2-9 illustrates the replaceable assemblies in the Keysight 53147A/148A/149A. Table 2-2...

  • Page 80: Figure 2-9 Replaceable Assembly Locations - Top Internal View

    Service Figure 2-9 Replaceable Assembly Locations — Top Internal View Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 81: Troubleshooting The Instrument

    Power Supply connectors TB1 and TB2 (see Figure 2-10). Pin 8 TB2 (DC Out) Neutral TB1 (AC In) Pin 1 Line Approx. location of R23 Figure 2-10 A4 DC Power Supply Test-Point Locations Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 82: A4 Power Supply Inputs And Outputs

    Table 2-3, it can be adjusted using R23, which is visible on the top surface of the power supply’s circuit board. When adjusting the +5 VDC output, use a nonmetallic or insulated adjustment tool. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 83: Self-Test

    Self-Test to indicate whether a component passed or failed its test. These messages are sent via the RS-232 serial output only—they do not appear on the instrument’s front-panel display. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 84 RS-232 serial output (in many cases, the exact message text that is displayed on the front panel is a condensed form of the message that is sent via RS-232). Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 85: Table 1-1 Table

    SERVICE FAIL The instrument’s service data is missing or has become corrupted. THRU FAIL Failure detected in the through-path circuit of Channel 2. VCO/CNT FAIL Failure detected in the VCO or the Count Chain. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 86: Table 1-3 Table

    Failure detected in RAM. ROM FAIL Failure detected in ROM. SAV SET FAIL One or more of the sets of user settings is missing corrupted. SERVICE FAIL The instrument’s service data is missing or corrupted. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 87 Service Table 2-6 RS-232 Error Messages (continued) Message Description THRU PATH FAIL Failure detected in the through-path circuit of Channel 2. VCO/COUNT CHAIN FAIL Failure detected in the VCO or the Count Chain. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 88 Service THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 89 Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Replacing Assemblies - Disassembly and Reassembly Introduction Tools Required Do This First Removing the Bumpers Removing the Handle Removing the Bumper Retainers Removing the Shroud Removing the Front Panel Assembly...

  • Page 90: Introduction

    Replacing Assemblies - Disassembly and Reassembly Introduction This chapter provides instructions for removing major assemblies in the Keysight 53147A/148A/149A. To install an assembly, apply the removal instructions in reverse. The following disassembly and repair procedures are provided: – “Removing the Bumpers”...

  • Page 91: Tools Required

    – #1 Phillips screwdriver – #2 Phillips screwdriver ® – TORX 15 (T15) hand screwdriver – 1/4-inch open-end or box wrench – 1/4-inch nut driver – 5/16-inch nut driver – 7 mm nut driver – Needle-nose pliers Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 92: Do This First

    TORX screws that attach the handle mounts to the instrument are metric. To avoid damage to the threaded holes in the chassis that handle mount screws fit in, be sure to use the correct screws. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 93: Removing The Bumpers

    The rear bumper can also serve as a holder for the instrument (once the bumper retainers are removed) when you need to position it upright on either end. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 94: Removing The Handle

    (remove the two screws that are closest to the back of the instrument). 5 Repeat Step 4 for the other handle mount. 6 While holding the handle to support it, remove the remaining two screws (one on each handle mount). 7 Remove the handle. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 95: Removing The Bumper Retainers

    If you do not intend to remove the shroud, insert the bumper retainer screws in the holes they were removed from (the holes are countersunk to accept the screws, and the screws can safely be inserted fully into the holes). Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 96: Removing The Shroud

    4 Remove the four bumper retainers from the front end of the instrument (see Figure 3-3 “Removing the Bumper Retainers” on page 95). 5 Remove the six bumper retainers at the rear end of the chassis. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 97: Figure 3-4 Removing The Shroud

    3-4), and place it aside (if the shroud does not slide easily off the chassis, press on the rear panel with one hand while pulling the shroud with the other hand). Figure 3-4 Removing the Shroud Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 98: Removing The Front Panel Assembly

    Channel 2 input connector to the sampler on the main circuit board. Do not attempt to fully loosen the nut at this time. As soon as the nut turns CAUTION freely, stop turning it, and proceed to the next step. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 99: Figure 3-5 Removing The Front Panel Assembly

    Channel 2 input connector. Gently pull the front panel assembly away from the chassis as you loosen the nut until the front panel assembly is completely disconnected. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 100 You must use a microwave torque wrench to tighten the nut that attaches the Channel 2 input connector to the sampler. Using any other tool to tighten the coupling nut will damage the connector, the sampler, or both. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 101: Removing The Rear Panel Assembly

    The screw in the lower-left corner of the rear panel assembly (as viewed from the NOTE rear of the Counter) may be covered by the serial-number sticker. If it is, carefully cut away the lower-left corner of the sticker to expose the screw head. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 102 Battery Charging LED, the serial-port connector (RJ-12), the GPIB connector, and the main board. If these components are not correctly aligned with the openings in the back panel, they may be damaged. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 103: Removing The Cooling Fan

    3-7). Figure 3-7 Cooling Fan Screws 4 While removing the cooling fan from the chassis, guide the cable to be sure it does not catch on other cables or other components of the instrument. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 104: Removing The Power Supply

    (see Figure 3-8). Figure 3-8 Removing the Power Supply 6 Remove the power supply. 7 Install the replacement power supply by reversing the instructions in Steps 1 through 6. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 105 “Power Supply Check” procedure on page 81. 9 If necessary, adjust the +5 VDC output of the power supply using the procedure titled “Adjusting the +5 VDC Output” on page 82. 10 Reassemble the instrument. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 106 Replacing Assemblies - Disassembly and Reassembly THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 107 Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Replaceable Parts Introduction Replaceable Parts How To Order A Part Parts Identification...

  • Page 108: Replaceable Parts

    Figure 4-3 is a top view of the chassis with the shroud removed. These illustrations are provided to help you locate and identify parts. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 109: Replaceable Parts

    1 Reference designation. 2 Keysight part number. 3 The quantity (QTY) of the part used in the instrument (field-replaceable items only). 4 Description of the part. 5 Typical manufacturer's part number for the part (when available). Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 110: How To Order A Part

    Replaceable Parts How To Order A Part Keysight Technologies wants to keep your parts ordering process as simple and efficient as possible. To order parts, perform the following steps: 1 Identify the part and the quantity you need. 2 Determine the ordering method to be used, and contact Keysight.

  • Page 111: Contacting Keysight Technologies

    Contacting Keysight Technologies Depending on where you are in the world, there are one or more ways to obtain parts or parts information from Keysight Technologies contact your local Keysight Technologies sales office. – Within the United States, we encourage you to order replacement parts or request parts information directly by telephone or mail from Keysight using the telephone numbers or address listed on the next page.

  • Page 112: Parts Identification

    Figure 4-2 and the top view of the chassis in Figure 4-3. When ordering from Keysight Technologies, the important numbers to note from the Parts List are the Keysight Part Number and the quantity of the part(s) you need. Reference Designations Table 4-1 lists the reference designations used in the parts lists.

  • Page 113: Figure 4-1 Keysight 53147A/148A/149A Exploded View - Internal

    Replaceable Parts H3, H4 Figure 4-1 Keysight 53147A/148A/149A Exploded View — Internal Parts Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 114 Replaceable Parts Figure 4-2 Keysight 53147A/148A/149A Exploded View — Cabinet and External Parts Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 115 Replaceable Parts P/O A6 Figure 4-3 Keysight 53147A/148A/149A Top View Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 116: Table 2-2 Table

    NUT, HEX, SELF-LOCKING, 4-40 53149A only With Option 002 only Without Option 002 Qty. = 8 without Option 002 Part of A10, in Counters without Option 002, this harness is used in place of W6 and W7. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 117: Table 2-4 Table

    2041083-01 53149A only With Option 002 only Without Option 002 Qty. = 8 without Option 002 Part of A10, in Counters without Option 002, this harness is used in place of W6 and W7. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 118: Table 2-6 Table

    5450031-01 53149A only With Option 002 only Without Option 002 Qty. = 8 without Option 002 Part of A10, in Counters without Option 002, this harness is used in place of W6 and W7. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 119: Keysight 53147A/148A/149A Accessories And Miscella

    Replaceable Parts Table 4-3 Keysight 53147A/148A/149A Accessories and Miscellaneous Items Description Keysight Part Number BATTERY 12 V 53150-80010 CABLE ASSY, EXT. DC POWER 53150-60214 GPIB CABLES 10833A/B/C/D TEST LEAD KIT, DVM 34132-37904 CABLE ASSY, POWER (AUSTRALIA) 8120-0696 CABLE ASSY, POWER (CANADA)
  • Page 120 Replaceable Parts THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 121: Backdating

    Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Backdating Introduction...
  • Page 122 If a Manual Updating Changes package is included with your Counter, modify existing guide information or replace the affected pages as directed in the pages of the Manual Updating Changes package. For additional information, contact the nearest Keysight Sales and Support Office. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 123: 6 Specifications

    Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Specifications For the specifications and characteristics of the 53147A/148A/149A Microwave Frequency Counter/Power Meter/DVM, refer to the datasheet at http://literature.cdn.keysight.com/litweb/pdf/5988-0300EN.pdf...

  • Page 124: 6 Specifications

    Specifications THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 125 Keysight 53147A/148A/149A Microwave Frequency Counter/ Power Meter/DVM Assembly Level Service Guide Rack Mounting the Instrument Rack Mounting the Instrument...

  • Page 126: A Rack Mounting The Instrument Rack Mounting The Instrument

    Rack Mounting the Instrument Rack Mounting the Instrument You can mount the Keysight 53147A, 53148A, and 53149A in a standard 19-inch rack using the optional Rack Mounting Kit (53147-67001) available from Keysight: To rack-mount the instrument, you must first remove the front bumper, the front bumper retainers, and the carrying handle.
  • Page 127 (the holes that were used to mount the front bumper retainers). Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 128 9 Place the four Nylon washers supplied in the Rack Mount Kit over the four 10-32 screws (3, 4). 10 Inspect the holes in the rack to determine if they are threaded. If the holes are threaded, skip Step 11. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 129 14 Tighten all four rack-mount screws. 15 Connect the power cord to the Main Power input connector on the instrument’s rear panel. 16 Connect the other end of the power cord to an appropriate AC power source. Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 130 Rack Mounting the Instrument THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight 53147A/148A/149A Assembly Level Service Guide...

  • Page 131: Index

    Calibration Procedures Exploded View Assistance calibration procedures exploded view Parts Ordering Channel 1 Frequency exploded views parts ordering Sensitivity Express Calibration Service parts-ordering information Complete Performance external parts Performance Test Record Tests External Timebase Tests Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 132 Top View Returning the Counter to Keysight top view Technologies for Service troubleshooting RS-232 Troubleshooting the Counter safety warranty Self-Test Serial Number service Shroud specifications Standby mode surface-mount components Test 1 Channel 1 Frequency Sensitivity Keysight 53147A/148A/149A Assembly Level Service Guide...
  • Page 133 This information is subject to change without notice. Always refer to the Keysight website for the latest revision. © Keysight Technologies 2001 - 2017 Edition 3, November 1, 2017 Printed in Malaysia *53147-90010*...

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