Agilent Technologies 53147A Assembly Level Service Manual
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Agilent Technologies 53147A Assembly Level Service Manual

Agilent Technologies 53147A Assembly Level Service Manual

Microwave frequency counter/power meter/dvm
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Assembly Level Service
Guide
This guide describes how to service the Agilent 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:
Agilent 53147A/148A/149A
Microwave Frequency Counter/
Power Meter/DVM
US4047 (53147A)
US4048 (53148A)
US4049 (53149A)

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Summary of Contents for Agilent Technologies 53147A

  • Page 1 Assembly Level Service Guide This guide describes how to service the Agilent 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.
  • Page 2 (cont’d) Certification Disconnect the product from All Rights Reserved. operating power before cleaning. WARNING Agilent Technologies, Inc. Reproduction, adaptation, or certifies that this product met BODILY INJURY OR DEATH Warning Symbols That May translations without prior its published specification at the...

  • Page 3: Table Of Contents

    Contents Performance Tests Introduction Operational Verification Complete Performance Tests Recommended Calibration Cycle Test Record Equipment Required Operational Verification Power-On Self Tests 10 MHz Test Run Self Test External Timebase Test 1-10 Power Meter Test 1-13 DVM Test 1-15 Complete Performance Tests 1-17 Test 1: Channel 1 Frequency Sensitivity 1-18...
  • Page 4 Contents Service Introduction Returning the Instrument to Agilent Technologies for Service Providing Repair Information Packing the Instrument in the Original Packaging Materials Packing the Instrument in Commercially Available Packaging Materials Calibration Procedures Equipment Required 10 MHz Timebase Calibration Power Reference Oscillator Frequency Calibration...
  • Page 5 3-11 Removing the Cooling Fan 3-14 Removing the Power Supply 3-15 Replaceable Parts Introduction Replaceable Parts How To Order A Part Contacting Agilent Technologies Parts Identification Reference Designations Cabinet Parts and Hardware Accessories and Miscellaneous Items Backdating Introduction Specifications Introduction...
  • Page 6 Contents Assembly Level Service Guide...
  • Page 7 Repair Strategy This service guide is designed to isolate failures to the assembly-level only. The Agilent 53147A/148A/149A instruments can be returned to Agilent for all service work, including troubleshooting, and verifying specifications. Contact your nearest Agilent Sales and Service Office for more details.
  • Page 8 Instruments Covered by this Guide This guide applies directly to Agilent 53147A, 53148A, and 53149A instruments that have the same serial number prefix(es) shown on the title page. If the serial number prefix of your instrument differs from that listed on the title page of this guide, there may be differences between this guide and your instrument.
  • Page 9 (to be provided when required). Chapter 6 Specifications lists all the specifications and operating characteristics for the Agilent 53147A/148A/149A. How to Order Guides The part number for this guide is listed on the Certification and Warranty page (on the back of the title page) and on the back cover of this guide.
  • Page 10 The Agilent 53147A, 53148A, and 53149A are capable of measuring frequencies from 10 Hz to 125 MHz on Channel 1 and from 50 MHz to 20 GHz (53147A), 26.5 GHz (53148A), and 46 GHz (53149A) on Channel 2. These instruments are also capable of measuring power (the power and frequency ranges for power measurement are dependent on the power- sensor model used) and DC voltages up to ±50 VDC.
  • Page 11 In This Guide Options The options available for the Agilent 53147A/148A/149A are listed following this paragraph. Specifications for the options are listed in Chapter 6, “Specifications.” Options ordered with the instrument are installed at the factory and are ready for operation on delivery.
  • Page 12 GPIB Cables (Agilent P/N 10833A/B/C/D) • RS-232 Cable (Agilent P/N 53150-60215) • • Power Sensors (Agilent 8480 series) Manuals Supplied Agilent 53147A/148A/149A Operating and Programming Guide (Agilent P/N 53147-90009) Agilent 53147A/148A/149A Assembly-Level Service Guide (Agilent P/N 53147-90010) Assembly Level Service Guide...
  • Page 13 Performance Tests Verifying Specifications...

  • Page 14: Performance Tests Introduction

    Chapter 1 Performance Tests Introduction Introduction This chapter provides procedures to test the electrical performance of the Agilent 53147A, 53148A and 53149A. These procedures are based on the specifications in Chapter 6, “Specifications.” Two types of testing are provided: •...

  • Page 15: Complete Performance Tests

    Chapter 1 Performance Tests Introduction Complete Performance Tests The Complete Performance Tests verify the specifications listed in Chapter 6, “Specifications.” All tests can be performed without opening the instrument. Recommended Calibration Cycle The instrument requires periodic verification of operation. Depending on the type of use, environmental conditions, aging, and measurement accuracy required, the instrument should be checked using the operational verification procedure at least once every year.

  • Page 16: Equipment Required

    1, 3, 10, 30, and 100 mW * Equivalent equipment can be substituted for all instruments and accessories. ** OV = Operational Verification P = Performance Tests C = Calibration T = Troubleshooting † One supplied with Agilent 53147A/48A/49A Assembly Level Service Guide...
  • Page 17 2.4 mm (f) to 2.4 mm (f) Agilent 11900B * Equivalent equipment can be substituted for all instruments and accessories. ** OV = Operational Verification P = Performance Tests C = Calibration T = Troubleshooting † One supplied with Agilent 53147A/48A/49A Assembly Level Service Guide...
  • Page 18 Power-On Self Tests NOTE This test is appropriate for the Agilent 53147A, 53148A, and 53149A. Inspect the instrument for damage. Make sure no cables are connected to the instrument’s inputs. Connect the power cord to the instrument and the power source.

  • Page 19: Operational Verification

    Chapter 1 Performance Tests Operational Verification Verify that the front-panel display shows the following: • All segments of the front-panel display are temporarily activated. • TESTING is displayed. SELF TEST OK is displayed. • The model number of the instrument is displayed (a four-digit hex •...

  • Page 20: 10 Mhz Test

    Chapter 1 Performance Tests Operational Verification 10 MHz Test Connect a BNC-to-BNC cable from the Reference 10MHz connector on the instrument’s rear panel to the CHANNEL 1 input connector on the front panel. Press and release the Chan Select key. Verify that Ch 1 is displayed in the upper-left corner of the display.

  • Page 21: Run Self Test

    Operational Verification Run Self Test NOTE This test is appropriate for the Agilent 53147A, 53148A, and 53149A. Disconnect all signal cables from the input and Reference 10MHz connectors. Press and release the Shift key, and then press and release the Menu (Reset/Local) key.

  • Page 22: External Timebase Test

    This allows the internal temperatures of the equipment to stabilize. • These tests are appropriate for the Agilent 53147A, 53148A, and 53149A. Connect an Agilent 10503 series coaxial cable between the output of the first Agilent 3325A/B Synthesizer and the Reference 10MHz connector on the instrument’s rear panel (see Figure 1-1).
  • Page 23 (Rear Panel) 10 MHZ Output Channel 1 (with 10100C 50Ω Feedthrough Attached) Agilent Agilent 3325A/B Synthesizer 53147A/48A/49A Agilent 2 MHz Output Figure 1-1. External Timebase Test Setup Cycle the POWER button to preset the instrument. Press the Shift key on the instrument’s front panel.
  • Page 24 Chapter 1 Performance Tests Operational Verification Set the frequency of the first Synthesizer (connected to the instrument’s rear-panel Reference 10MHz connector) to 10 MHz at 1 V rms. Set the frequency of the second Synthesizer (connected to the instrument’s Channel 1 input connector) to 2 MHz at 100 mV rms. Press and release the instrument’s Reset/Local key.

  • Page 25: Power Meter Test

    This allows the internal temperatures of the equipment to stabilize. • These tests are appropriate for the Agilent 53147A, 53148A, and 53149A. Connect one end of the Agilent 11730A cable (supplied with instrument) to the Power Meter INPUT connector on the front panel of the Agilent 53147A, 53148A, or 53149A.
  • Page 26 Chapter 1 Performance Tests Operational Verification Press the Zero key. The display shows ZEROING for several seconds. Connect the power sensor head to the Power Meter OUTPUT connector. Press the Cal key. The display briefly shows CALIBRATING. Turn on the power reference output in the instrument’s menu (PWR REF >...

  • Page 27: Dvm Test

    This allows the internal temperatures of the equipment to stabilize. • These tests are appropriate for the Agilent 53147A, 53148A, and 53149A. Set the output of the E3640A DC Power Supply to +25 VDC. Set the Agilent 34401A Digital Multimeter to the lowest DC voltage range capable of safely measuring 25 VDC.
  • Page 28 Disconnect the test leads from the Agilent E3640A DC Power Supply. Be careful not to disturb the voltage setting. Connect the test leads to the Agilent 53147A/48A/49A (be sure to observe the correct polarity). Press the Display DVM key on the Agilent 53147A/48A/49A front panel.

  • Page 29: Complete Performance Tests

    Complete Performance Tests Complete Performance Tests The Complete Performance Tests verify the specifications of the Agilent 53147A/148A/149A listed in Chapter 6, “Specifications.” All of these tests can be performed without opening the instrument. Table 1-2 lists a summary of the performance tests.

  • Page 30: Test 1: Channel 1 Frequency Sensitivity

    This allows the internal temperatures of the equipment to stabilize. • These tests are appropriate for the Agilent 53147A, 53148A, and 53149A. If the Agilent 3325A/B Synthesizer or the Agilent 83650B Synthesizer • reference output is not adequate to drive the 53147A/48A/49A, connect...
  • Page 31 To Reference Output (Rear Panel) Agilent 53147A/48A/49A Agilent Channel 1 Figure 1-3. 10 Hz to 20 MHz Frequency Sensitivity Test Setup Verify that the Counter is still set to use an external reference signal (refer to steps 5 through 10 on page 1-11).

  • Page 32: Test 1B: 50 Mhz To 125 Mhz Frequency Sensitivity

    To Reference 10 MHz Agilent 11667C Connector Power Splitter (Rear Panel) Agilent Agilent 8487A/D Agilent 10100C 50 53147A/48A/49A Power Sensor Feedthrough Agilent Agilent 8490D 20 dB Attenuator Agilent 11904A 2.92 mm to 2.4 mm Adapter Agilent 1250-2015 BNC to SMA Adapter Channel 1 Figure 1-4.
  • Page 33 Chapter 1 Performance Tests Test 1: Channel 1 Frequency Sensitivity Connect the Agilent 1250-2015 BNC (m) to SMA (f) Adapter to the Agilent 10100C Feedthrough Terminator on the Counter’s CHANNEL 1 connector. Connect the Agilent 11904A 2.92 mm (m) to 2.4 mm (m) Adapter to the Agilent 1250-2015 Adapter.
  • Page 34 Chapter 1 Performance Tests Test 1: Channel 1 Frequency Sensitivity Record the frequency value read on the Counter (±1 count) for Test 1b in the Performance Test Record on page 1-39. Set the output of the Synthesizer to 125 MHz, and repeat steps 11 through 13.

  • 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 Agilent 53147A, 53148A, and 53149A. • Connect the Agilent 11904D 2.92 mm (m) to 2.4 mm (f) Adapter to the Counter’s CHANNEL 2 input connector (refer to Figure 1-5 for steps 1...
  • Page 36 To Reference 10 MHz Input RF Output Connector (Rear Panel) HP 11667C Power Splitter Agilent 53147A/48A/49A HP 8487A/D Power Sensor Agilent HP 8490D 20 dB Attenuator Channel 2 (50 MHz to 40 GHz tests only) HP 11904D Adapter Figure 1-5. 50 MHz to 20 GHz Frequency Sensitivity Test Setup Verify that the instrument is still set to use an external reference signal (refer to steps 5 through 10 on page 1-11).

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

    Repeat steps 6, through 8 for each of the remaining frequencies specified for 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).

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

    Chapter 1 Performance Tests Test 2: Channel 2 Frequency Sensitivity Test 2c: 30 GHz to 46 GHz Frequency Sensitivity NOTE This test is appropriate for the 53149A only. Use the same test setup as described for Test 2a on page 1-23. Set the output of the Agilent 83650B Synthesizer to the first frequency specified for Test 2c in the Performance Test Record on page 1-40 (30 GHz).

  • Page 39: Test 3: Power Measurement

    This allows the internal temperatures of the equipment to stabilize. • These tests are appropriate for the Agilent 53147A, 53148A, and 53149A. Connect the Agilent 11730A Power Sensor Cable between Agilent 11683A Range Calibrator’s output connector and the Agilent 53147A, 53148A, or 53149A’s Power Meter INPUT connector.
  • Page 40 Chapter 1 Performance Tests Test 3: Power Measurement Press the Shift + dBm/W key on the Agilent 53147A, 53148A, or 53149A to set the Power Meter to display readings in Watts, mW, and/or µW. Set the Range Calibrator switches as follows:...
  • Page 41 Record the actual power readings in the Performance Test Record on page 1-41. Press the Shift + dBm/W key on the Agilent 53147A, 53148A, or 53149A again to set the Power Meter to display readings in dBm. 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...

  • Page 42: Test 4: Power Reference Oscillator Frequency

    This procedure specifies the Agilent 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: Channel 1 Frequency Sensitivity” on page 1-18), you can use it in place of the 53150A in this procedure.
  • Page 43 The reference oscillator is normally off. It is turned on automatically during 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.

  • Page 44: Test 5: Power Meter Reference Level

    Agilent 11730A Power Sensor Cable (supplied with 53147A/48A/49A) NOTES • To ensure that the test results are valid, the Agilent 53147A/48A/49A and the test equipment should be powered on for at least 30 minutes prior to beginning the tests. This allows the internal temperatures of the equipment to stabilize.
  • Page 45 Calibrate the E4418B Power Meter. Disconnect the Agilent 8481A Power Sensor from the Agilent E4418B Power Meter, and immediately connect it to the Power OUTPUT connector on the Agilent 53147A/48A/49A (see Figure 1-9). Output connector (with Agilent 8481A Power Sensor Attached)

  • Page 46: Power Meter Reference Level: Method 2

    This allows the internal temperatures of the equipment to stabilize. • This test is appropriate for the Agilent 53147A, 53148A, and 53149A. Turn the Agilent 432A Power Meter off. Do not turn it on until instructed to do so.
  • Page 47 Chapter 1 Performance Tests Test 5: Power Meter Reference Level Connect the Agilent 478A-H75 or 478A-H76 Thermistor Mount to the Agilent 53147A/148A/149A Power Meter OUTPUT connector, as shown in Figure 1-11. NOTE Do not use a cable between the Thermistor Mount and the 53147A/148A/149A Power Meter OUTPUT connector.
  • Page 48 The reference oscillator is normally off. It is turned on automatically during 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.
  • Page 49 432A Power Meter’s chassis ground. Observe the reading on the Multimeter, and keep a record of this value as V COMP Calculate the output level of the 53147A/148A/149A’s power reference oscillator (P rf ) using the following formula: – V ) + V –...
  • Page 50 Chapter 1 Performance Tests Test 5: Power Meter Reference Level The following is an example showing how a calculation of the Power NOTE Reference Output Level is performed: Ω R = 200 V 0 = 170 µV or 170 x 10 –6 V 1 = 78,107 µV or 78,107 x 10 –6...

  • Page 51: Performance Test Record (Page 1 Of 3)

    Chapter 1 Performance Tests Performance Test Record (Page 1 of 3) Performance Test Record (Page 1 of 3) Agilent 53147A/148A/149A Frequency Counter/Power Meter/DVM Serial Number: Repair/Work Order No. Test Performed By: Temperature: Date: Relative Humidity: Notes: ❏ ❏ Pre Calibration Test...

  • Page 52: Performance Test Record (Page 2 Of 3)

    Performance Test Record (Page 2 of 3) Test Complete Test Results Number Performance Tests Specifications Pass Fail ❏ ❏ Channel 2 Frequency Sensitivity 53147A 53148A 53149A 50 MHz –20 dBm –20 dBm –20 dBm 100 MHz " " " 250 MHz "...

  • Page 53: Performance Test Record (Page 3 Of 3)

    Chapter 1 Performance Tests Performance Test Record (Page 3 of 3) Performance Test Record (Page 3 of 3) Test Complete Test Results Number Performance Tests Specifications Pass Fail ❏ ❏ Power Measurement: 3 µW ± 0.02 dB or ± 0.5% 10 µW "...
  • Page 54 Chapter 1 Performance Tests Performance Test Record (Page 3 of 3) 1-42 Assembly Level Service Guide...
  • Page 55 Service...

  • Page 56: Service Introduction

    Chapter 2 Service Introduction Introduction This chapter provides service information for your Agilent 53147A/ 148A/149A. It is divided into four major sections: Returning the Instrument to Agilent Technologies for Service • (page 2-3). This section provides you with step-by-step instructions on how to return the instrument for service.

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

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

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

    Chapter 2 Service Returning the Instrument to Agilent Technologies for Service Packing the Instrument in the Original Packaging Materials To prevent shipping damage, it is best to repack the instrument in its original packaging. In any correspondence, refer to the instrument by the model number and the complete serial number.

  • Page 59: Packing The Instrument In Commercially Available

    Chapter 2 Service Returning the Instrument to Agilent Technologies for Service Packing the Instrument in Commercially Available Packaging Materials If the original factory packaging materials are not available, use the following procedure to pack the instrument in commercially available shipping materials.

  • Page 60: Calibration Procedures

    Type N (m) to BNC (f) Agilent E9635A * Equivalent equipment can be substituted for all instruments and accessories. ** OV = Operational Verification P = Performance Tests C = Calibration T = Troubleshooting † One supplied with Agilent 53147A/48A/49A Assembly Level Service Guide...

  • Page 61: 10 Mhz Timebase Calibration

    Calibration Procedures 10 MHz Timebase Calibration Equipment Required 10 MHz Frequency Reference Standard Agilent 11730A Power Sensor Cable (provided with 53147A/148A/149A) Agilent 10503 series BNC (m) to BNC (m) Coaxial Cable Small, non-metallic adjustment tool for slotted screw heads NOTE The instrument and the test equipment must be powered on for at least 30 minutes prior to beginning this calibration procedure.
  • Page 62 Chapter 2 Service Calibration Procedures Calibration Access Hole Figure 2-1. Calibrating the 10 MHz Frequency Reference Oscillator Insert a non-metallic, slot-type adjustment tool through the hole near the bottom of the instrument’s left side and into the slot in the timebase calibration screw.

  • Page 63: Power Reference Oscillator Frequency Calibration

    Remove the shroud from the Agilent 53147A/48A/49A (see “Removing the Shroud” on page 3-7). Position the Agilent 53147A/48A/49A 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 64 On/Off Channel 1 Input Figure 2-2. Reference Oscillator Frequency Adjustment Setup Connect the power cord to the Agilent 53147A/48A/49A and to a power outlet. DANGEROUS VOLTAGES ARE PRESENT INSIDE THE AGILENT WARNING 53147A/148A/149A WHEN IT IS CONNECTED TO A POWER SOURCE.
  • Page 65 NOTE during 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 66 Chapter 2 Service Calibration Procedures (Frequency Adjustment) (Power Adjustment) Figure 2-3. Power Reference Oscillator Adjustment Locations 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. 2-12 Assembly Level Service Guide...

  • Page 67: Power Reference Oscillator Level Adjustment

    Agilent 11730A Power Sensor Cable (supplied with 53147A/48A/49A) NOTES • To ensure that the results are valid, the Agilent 53147A/48A/49A and the test equipment should be powered on for at least 30 minutes prior to beginning the calibration procedure. This allows the internal temperatures of the equipment to stabilize.
  • Page 68 Calibrate the E4418B Power Meter. Disconnect the Agilent 8481A Power Sensor from the Agilent E4418B Power Meter, and immediately connect it to the Power OUTPUT connector on the Agilent 53147A/48A/49A (see Figure 2-5). Output connector (with Agilent 8481A Power Sensor Attached)
  • Page 69 Agilent 8120-1082 Power Sensor Cable NOTE To ensure that the results are valid, the Agilent 53147A/48A/49A and the test equipment should be powered on for at least 30 minutes prior to beginning the calibration procedure. This allows the internal temperatures of the equipment to stabilize.
  • Page 70 Chapter 2 Service Calibration Procedures Do not use a cable between the Thermistor Mount and the 53147A/ NOTE 148A/149A Power Meter OUTPUT connector. Connect the Thermistor Mount directly to the OUTPUT connector. Agilent 478A-H75 or 478A-H76 Thermistor Mount (connected to Power...
  • Page 71 The reference oscillator is normally off. It is turned on automatically during 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.
  • Page 72 432A Power Meter’s chassis ground. Observe the reading on the Multimeter, and keep a record of this value as V COMP Calculate the output level of the 53147A/148A/149A’s power reference oscillator (P rf ) using the following formula: – V ) + V –...
  • Page 73 Chapter 2 Service Calibration Procedures The following is an example showing how a calculation of the Power NOTE Reference Output Level is performed: Ω R = 200 V 0 = 170 µV or 170 x 10 –6 V 1 = 78,107 µV or 78,107 x 10 –6 or .078 V V comp = 5.1583 V...

  • Page 74: Dvm Calibration

    Agilent 6613C or 6614C Precision DC Power Supply NOTE To ensure that the results are valid, the Agilent 53147A/48A/49A and the Agilent 6613C/6614C Precision DC Power Supply should be powered on for at least 30 minutes prior to beginning the calibration procedure.
  • Page 75 Chapter 2 Service Calibration Procedures *********************** DVM TESTS *********************** Select one of the following DVM tests: 1. Measure Fz - Frequency in Zero Mode 2. Measure Fr - Frequency in Positive Reference Mode 3. Measure Fn - Frequency in Negative Reference Mode 4.
  • Page 76 Chapter 2 Service Calibration Procedures 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). When the calibration program redisplays its menu (as shown in Figure 2-8), type “e”...

  • Page 77: Pre-Troubleshooting Information

    Chapter 2 Service Pre-Troubleshooting Information Pre-Troubleshooting Information This section contains the following pertinent troubleshooting information: • Safety Considerations • Recommended Test Equipment Repair Considerations • • After Service Considerations • Assembly Identification and Location Safety Considerations Although this instrument has been designed in accordance with international safety standards, this guide contains information, cautions, and warnings which must be followed to ensure safe operation and to retain the instrument in a safe condition.

  • Page 78: Recommended Test Equipment

    Recommended Test Equipment Test equipment recommended for testing and troubleshooting the Agilent 53147A/148A/149A is listed in Chapter 1, “Performance Tests.” Substitute equipment may be used if it meets or exceeds the required characteristics listed in Table 1-1.

  • Page 79: Surface Mount Repair

    Chapter 2 Service Pre-Troubleshooting Information Surface Mount Repair None of the assemblies in the instrument that use surface-mount components can be repaired outside of authorized Agilent Service Centers. Any attempt to repair these assemblies voids the Agilent factory warranty. Disassembly and Reassembly Specifics Refer to Chapter 3 of this guide, “Replacing Assemblies,”...

  • Page 80: Product Performance Checks

    Chapter 1 of this guide, “Performance Tests.” Assembly Identification and Location The assembly number, name, and Agilent part number of each of the Agilent 53147A, 53148A, and 53149A assemblies are listed in Table 2-2. Figure 2-9 illustrates the replaceable assemblies in the Agilent 53147A/148A/149A.
  • Page 81 Chapter 2 Service Pre-Troubleshooting Information Figure 2-9. Replaceable Assembly Locations — Top Internal View Assembly Level Service Guide 2-27...

  • Page 82: Troubleshooting The Instrument

    Chapter 2 Service Troubleshooting the Instrument Troubleshooting the Instrument Power Supply Check HAZARDOUS VOLTAGES ARE PRESENT ON THE POWER WARNING SUPPLY ASSEMBLY. ONLY TRAINED AND QUALIFIED SERVICE PERSONNEL SHOULD PERFORM THE FOLLOWING PROCEDURE. Remove the power cord from the back of the instrument. Remove the cover as described in Chapter 3.
  • Page 83 Chapter 2 Service Troubleshooting the Instrument Table 2-3 lists A4 Power Supply’s input and output voltages, the corresponding wire color for each input and output, and the tolerances specified for these voltages. Table 2-3. A4 Power Supply Inputs and Outputs Input/Output Voltage Connector and Pin Designation Wire Color Tolerance AC-input (neutral) 0 VAC*...

  • Page 84: Self-Test

    Chapter 2 Service Troubleshooting the Instrument Self-Test The instrument performs a Self-Test procedure when it is powered on. The Self-Test can also be invoked from the instrument’s Menu. Running the Self Test Disconnect all cables connected to the instrument’s front and rear signal connectors.

  • Page 85: Self Test Error Messages

    Chapter 2 Service Troubleshooting the Instrument Self Test Error Messages Table 2-4 lists and describes messages that are generated by the instrument during 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.
  • Page 86 Chapter 2 Service Troubleshooting the Instrument Tables 2-5 and 2-6 list and describe the messages that are generated by the instrument during Self-Test or during operation to indicate that a problem has been detected. These messages are displayed on the instrument’s front-panel display and are also sent via the 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).
  • Page 87 Chapter 2 Service Troubleshooting the Instrument Table 2-6. RS-232 Error Messages Message Description 12V FAIL The +12 VDC output from the power supply is not within specifications. –12V FAIL The –12 VDC output from the power supply is not within specifications. –5V FAIL The –5 VDC output from the power supply is not within specifications.
  • Page 88 Chapter 2 Service Troubleshooting the Instrument 2-34 Assembly Level Service Guide...

  • Page 89: Replacing Assemblies

    Replacing Assemblies Disassembly and Reassembly...

  • Page 90: Introduction

    Chapter 3 Replacing Assemblies Introduction Introduction This chapter provides instructions for removing major assemblies in the Agilent 53147A/148A/149A. To install an assembly, apply the removal instructions in reverse. The following disassembly and repair procedures are provided: Removing the Bumpers pg. 3-4 •...

  • Page 91: Tools Required

    Chapter 3 Replacing Assemblies Tools Required Tools Required The following tools are required for the removal/replacement procedures in this chapter: • #1 Phillips screwdriver • #2 Phillips screwdriver ® TORX 15 (T15) hand screwdriver • 1/4-inch open-end or box wrench •...

  • Page 92: Removing The Bumpers

    Chapter 3 Replacing Assemblies Removing the Bumpers Removing the Bumpers Use the following procedure to remove the front and rear protective bumpers: Remove the rear bumper by lifting the inner edge of the bumper away from the shroud near one corner at the top and one side and pulling that corner away from the instrument.

  • Page 93: Removing The Handle

    Chapter 3 Replacing Assemblies Removing the Handle Removing the Handle Use the following procedure to remove the carrying handle: Remove the front bumper (see “Removing the Bumpers” on page 3-4). Stand the instrument on end on its back bumper. Position the handle so that it is against the top surface of the shroud (see Figure 3-2).

  • Page 94: Removing The Bumper Retainers

    Chapter 3 Replacing Assemblies Removing the Bumper Retainers Removing the Bumper Retainers Use the following procedure to remove the bumper retainers: Remove the front and rear bumpers (see “Removing the Bumpers” on page 3-4). Use a #1 Phillips screwdriver to remove the two 4-40 x 7/16-inch flathead machine screws that attach each bumper retainer to the chassis (see Figure 3-3).

  • Page 95: Removing The Shroud

    Chapter 3 Replacing Assemblies Removing the Shroud Removing the Shroud Use the following procedure to remove the shroud: WHEN THE SHROUD IS REMOVED FROM THE COUNTER, WARNING DANGEROUS LINE VOLTAGES THAT CAN CAUSE SERIOUS INJURY ARE EXPOSED. ALWAYS DISCONNECT THE POWER CORD BEFORE REMOVING THE SHROUD.

  • Page 96: Removing The Front Panel Assembly

    Chapter 3 Replacing Assemblies Removing the Front Panel Assembly Figure 3-4. Removing the Shroud Removing the Front Panel Assembly Use the following procedure to remove the front panel assembly: Remove the shroud (see “Removing the Shroud” on page 3-7). Use a 5/16-inch wrench to loosen the nut that attaches the Power Meter output cable to the back of the Power Meter OUTPUT connector on the front panel assembly.
  • Page 97 Chapter 3 Replacing Assemblies Removing the Front Panel Assembly Disengage the Power Meter output cable from the cable clamp on the chassis floor near the right front corner of the chassis. Disconnect the Power Meter input cable from J22, which is accessible through the rectangular opening in the chassis floor near the right-front corner of the chassis.
  • Page 98 Chapter 3 Replacing Assemblies Removing the Front Panel Assembly Figure 3-5. Removing the Front Panel Assembly Remove the five 4-40 x ¼-inch flathead machine screws that attach the front-panel assembly to the bottom of the chassis. Remove the two 6-32 x ¼-inch flathead machine screws from the countersunk holes at each side of the front the end of the chassis.

  • Page 99: Removing The Rear Panel Assembly

    If the Battery Option is installed, remove the battery sled from the Counter (for instructions on removing the battery sled, see Appendix C of the Agilent 53147A/148A/149A Operating Guide). If the Battery Option is installed, remove the four 4-40 x 3/16-inch...
  • Page 100 Chapter 3 Replacing Assemblies Removing the Rear Panel Assembly Disconnect the external-reference input/output cable (coaxial) from connector J8 on the main board. J8 is directly under the back edge of the power supply near the chassis wall. A two-wire AC-input cable (brown and blue wires) runs between the AC input module on the rear-panel assembly and the connector that is accessible through the cutout in the front of the power supply enclosure (TB1).

  • Page 101: Removing The Cooling Fan

    Chapter 3 Replacing Assemblies Removing the Cooling Fan Removing the Cooling Fan Use the following procedure to remove the cooling fan: Remove the shroud (see “Removing the Shroud” on page 3-7). Disconnect the two-wire cooling-fan power cable (blue and red wires) from J16 on the main board.

  • Page 102: Removing The Power Supply

    Chapter 3 Replacing Assemblies Removing the Power Supply Removing the Power Supply Use the following procedure to remove the power-supply: Remove the shroud (see “Removing the Shroud” on page 3-7). Place the rear bumper face-down on your work surface (the portion of the bumper that normally fits around the end of the instrument should be facing up).
  • Page 103 Chapter 3 Replacing Assemblies Removing the Power Supply Remove the power supply. Install the replacement power supply by reversing the instructions in Steps 1 through 6. Turn the instrument on, and perform the “Power Supply Check” procedure on page 2-28. If necessary, adjust the +5 VDC output of the power supply using the procedure titled “Adjusting the +5 V Output”...
  • Page 104 Chapter 3 Replacing Assemblies Removing the Power Supply 3-16 Assembly Level Service Guide...
  • Page 105 Replaceable Parts...

  • Page 106: Introduction

    Table 4-2 lists all replaceable assemblies and parts. Figure 4-1 is an exploded view of the Agilent 53147A/148A/149A’s internal parts, Figure 4-2 is an exploded view of the cabinet and other external parts, and Figure 4-3 is a top view of the chassis with the shroud removed.

  • Page 107: How To Order A Part

    How To Order A Part How To Order A Part Agilent Technologies wants to keep your parts ordering process as simple and efficient as possible. To order parts, perform the following steps: Identify the part and the quantity you need.

  • Page 108: Contacting Agilent Technologies

    Depending on where you are in the world, there are one or more ways to obtain parts or parts information from Agilent Technologies. • Outside the United States, contact your local Agilent Technologies sales office. Within the United States, we encourage you to order replacement •...

  • Page 109: Parts Identification

    To identify the part(s) you need, refer to the exploded views in Figures 4-1 and 4-2 and the top view of the chassis in Figure 4-3. When ordering from Agilent Technologies, the important numbers to note from the Parts List are the Agilent Part Number and the quantity of the part(s) you need.
  • Page 110 Chapter 4 Replaceable Parts Parts Identification H3, H4 Figure 4-1. Agilent 53147A/148A/149A Exploded View — Internal Parts Assembly Level Service Guide...
  • Page 111 Chapter 4 Replaceable Parts Parts Identification Figure 4-2. Agilent 53147A/148A/149A Exploded View — Cabinet and External Parts Assembly Level Service Guide...
  • Page 112 Chapter 4 Replaceable Parts Parts Identification P/O A6 Figure 4-3. Agilent 53147A/148A/149A Top View Assembly Level Service Guide...
  • Page 113 Chapter 4 Replaceable Parts Parts Identification ASSY, Table 4-2. Agilent 53147A/148A/149A Replaceable Parts Reference Agilent Mfr. Part Designation Part Number Qty. Description Number 53152-80001 ADAPTER, 2.92 mm FEMALE 2610181-00 A2 (53147A) 53147-60207 PANEL ASSY, FRONT (53147A) 2011509-01 A2 (53148A) 53148-60207...
  • Page 114 Chapter 4 Replaceable Parts Parts Identification Table 4-2. Agilent 53147A/148A/149A Replaceable Parts (Continued) Reference Agilent Mfr. Part Designation Part Number Qty. Description Number 3050-0010 WASHER, FLAT, #6 — 0590-0157 NUT, HEX, SELF-LOCKING, 6-32 5000046-00 2200-0155 SCREW, PANHEAD, 4-40x1 5120004-16 2200-0143...
  • Page 115 Chapter 4 Replaceable Parts Parts Identification Table 4-3. Agilent 53147A/148A/149A Accessories and Miscellaneous Items Description Agilent Part Number 53150-80010 BATTERY 12 V 53150-60214 CABLE ASSY, EXT. DC POWER 10833A/B/C/D GPIB CABLES 34132-37904 TEST LEAD KIT, DVM 8120-0696 CABLE ASSY, POWER (AUSTRALIA)
  • Page 116 Chapter 4 Replaceable Parts Parts Identification 4-12 Assembly Level Service Guide...
  • Page 117 Backdating...

  • Page 118: Backdating Introduction

    Chapter 5 Backdating Introduction Introduction Since this is the first edition of this guide, this chapter does not contain any information for adapting this guide to apply to older instruments. As engineering changes are made, newer instruments may have higher serial prefix numbers than the ones shown on the title page of this guide.
  • Page 119 Specifications...

  • Page 120: Specifications Introduction

    Chapter 6 Specifications Introduction Introduction The specifications for the Agilent 53147A, 53148A, and 53149A are provided in this chapter. Assembly Level Service Guide...

  • Page 121: Measurement Specifications And Characteristics

    All measurement specifications are over the full signal and temperature ranges unless otherwise noted. All specifications are warranted. Those items labeled “typical” or “nominal” are characteristics and are not warranted. Input Characteristics 53147A 53148A 53149A Frequency Range Channel 1 (Normal mode) 10 Hz–125 MHz...
  • Page 122 Chapter 6 Specifications Introduction Input Characteristics (continued) 53147A 53148A 53149A Emissions (typical) (“kickback noise”) Channel 1 −40 dBm/<−70 dBm −40 dBm/<−70 dBm −40 dBm/<−70 dBm Channel 2 (measuring/no input) Resolution selection Channel 1/Channel 2 1 Hz to 1 MHz 1 Hz to 1 MHz...
  • Page 123 Chapter 6 Specifications Introduction Power Meter Specifications 53147A, 53148A, and 53149A Frequency range 100 kHz to 50 GHz, sensor dependent Power range -70 to +44 dBm, sensor dependent Power sensors supported 8480 series (8487A, 8485A, 8482A, 8481D, 8481A, 8481B, 8482B, 8481H, 8482H, 8485D, 8487D) Resolution 0.01 dB in log mode, 0.1% of full scale in linear mode...
  • Page 124 Chapter 6 Specifications Introduction General information (continued) 53147A, 53148A, and 53149A Power Supply 90-132 Vac; 47.5-66 Hz or 360-440 Hz 216-264 Vac; 47.5-66 Hz Line selection automatic Power requirements 80 VA max. (32 W typical) dc (Option 002 only) 11-18 Vdc; 2A max.

  • Page 125: Rack Mounting The Instrument

    Rack Mounting the Instrument...
  • Page 126 Appendix A Rack Mounting the Instrument Rack Mounting the Instrument Rack Mounting the Instrument You can mount the Agilent 53147A, 53148A or 53149A in a standard 19-inch rack using the optional Rack Mounting Kit (53147-67001) available from Agilent: To rack-mount the instrument, you must first remove the front bumper, the front bumper retainers, and the carrying handle.
  • Page 127 Appendix A Rack Mounting the Instrument Rack Mounting the Instrument Position the rack-mount panel (53147-60211) on the front of the instrument so that the four holes in the top and bottom of the rack-mount panel are aligned with the four threaded holes in the top and bottom of the instrument (the holes that were used to mount the front bumper retainers).
  • Page 128 Appendix A Rack Mounting the Instrument Rack Mounting the Instrument Insert the eight 3/8-inch x 4-40, pan-head Phillips screws (2) supplied in the Rack Mount Kit through the holes in the top and bottom of the rack- mount panel into the threaded holes in the top and bottom of the instrument.
  • Page 129 Appendix A Rack Mounting the Instrument Rack Mounting the Instrument Insert the four sheet-metal U-nuts provided in the Rack Mount Kit in the rack flange behind the four holes you intend to use to mount the instrument. While holding the instrument in position in the rack, insert one of the 10-32 screws with the Nylon washer on it (3,4) through one of the upper holes in the rack-mount panel into the threaded hole in the rack (or into the U-nut you installed in Step 11 if the hole is not threaded).
  • Page 130 Appendix A Rack Mounting the Instrument Rack Mounting the Instrument Assembly Level Service Guide...

  • Page 131: Index

    VCO/CNT FAIL 2-32 calibration procedures Exploded View 4-2, 4-5, 4-6 Channel 1 Frequency Sensitivity 1-18 Express Calibration Service Complete Performance Tests external parts 1-17 1-39 External Timebase Tests 1-10 Contacting Agilent Technologies Cooling Fan 3-14 correspondence Assembly Level Service Guide Index-1...
  • Page 132 Index Performance Test Record 1-39 performance test record 1-39 Power Measurement 1-27 Frequency Sensitivity 1-18 1-20 1-23 power reference oscillator 1-25 1-26 1-39 1-40 Power Supply Assembly 2-28 Front Panel at a Glance Rack Mounting the Counter Handle Rear Panel Assembly 3-11 How To Order A Part Recommended Calibration Cycle...
  • Page 133 Index test equipment 2-24 test record 1-39 Test 1 timebase Channel 1 Frequency Sensitivity 1-18 toll-free number Test 1a Tools 10 Hz to 20 MHz Frequency Tools Required Sensitivity 1-18 Top View Test 1b top view 50 MHz to 125 MHz Frequency troubleshooting 2-23 2-28...
  • Page 134 Index Index-4 Assembly Level Service Guide...
  • Page 135 Service and Support Contacting Agilent Technologies: For more information about Agilent test and measurement products, applications, and services, visit our web site at http://www.agilent.com/services/English/index.html. Agilent’s Test and Measurement Fax Service for United States and Canada: Technical information for test and measurement products and services is available 24 hours a day, 7 days a week, by...
  • Page 136 Continued from front matter. . . Warranty (cont’d) Agilent will be liable for damage Safety Considerations For continued protection to tangible property per incident against fire, replace the line (cont’d) Agilent does not warrant that up to the greater of $300,000 or fuse(s) with fuses of the same the operation of Agilent the actual amount paid for the...

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