Keysight U8903B Service Manual
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Keysight U8903B Service Manual

Performance audio analyzer
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Keysight U8903B
Performance Audio Analyzer
Service Guide

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Summary of Contents for Keysight U8903B

  • Page 1 Keysight U8903B Performance Audio Analyzer Service Guide...

  • Page 2: Safety Information

    Declarations of Conformity for this where in the EULA. Keysight shall be product and for other Keysight prod- under no obligation to update, revise or ucts may be downloaded from the WARNING otherwise modify the Software.

  • Page 3: Safety Symbols

    Caution, risk of danger (refer to this manual Caution, risk of electric shock for specific Warning or Caution information) Earth (ground) terminal Frame or chassis (ground) terminal Equipment protected throughout by double Protective earth (ground) terminal insulation or reinforced insulation Keysight U8903B Service Guide...

  • Page 4: Safety Considerations

    Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards for design, manufacture, and intended use of the instrument. Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements.

  • Page 5: Environmental Conditions

    Environmental Conditions The U8903B is designed for indoor use and in an area with low condensation. The table below shows the general environmental requirements for this instrument. Environmental cond ition Requirement Operating condition – 0 °C to 55 °C Temperature Storage condition –...
  • Page 6 Regulatory Information The U8903B complies with the following safety and Electromagnetic Compatibility (EMC) compliances: Safety compliance – IEC 61010-1:2010/EN 61010-1:2010 – Canada: CAN/CSA-C22.2 No. 61010-1-12 – USA: ANSI/UL Std. No. 61010-1 (3rd Edition) EMC compliance – IEC 61326-1:2005/EN61326-1:2006 – Canada: ICES-001:2004 –...
  • Page 7 Forty years is the expected MSIP-REM-ATI- the home. useful life of the product. WCAUD8903B Keysight U8903B Service Guide...
  • Page 8 To return this unwanted instrument, contact your nearest Keysight Service Center, or visit www.keysight.com/environment/product for more information. Sales and Technical Support To contact Keysight for sales and technical support, refer to the support links on the following Keysight websites: – www.keysight.com/find/U8903B...

  • Page 9: Table Of Contents

    ..........63 Keysight U8903B User’s Guide...
  • Page 10 ..........84 U8903B Bluetooth Card Verification .
  • Page 11 Appendix C Modify a Cable for the U8903B CMRR test ........162...
  • Page 12 THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B User’s Guide...

  • Page 13: List Of Figures

    ......71 Figure 4-4 U8903B balanced digital output to its own balanced digital input for bal- anced input sampling rate accuracy verification .
  • Page 14 ....81 Figure 5-1 Connecting the U8903B Tester RF1 port to DUT RF1 port for Keysight U8903B Bluetooth card functional verification ....85...

  • Page 15: List Of Tables

    Table 5-5 A2DP APTX functional test points and limits for analyzer and generator Table 5-6 U8903B Bluetooth test to be repeated and its prerequisite ...94 Table A-1 Test record for DC accuracy verification .
  • Page 16 ..........162 Keysight U8903B User’s Guide...
  • Page 17 Performance Audio Analyzer Service Guide Performance Verification Overview Introduction Self-Test Keysight Calibration Services Calibration Interval Recommended Test Equipment Test Consideration This chapter provides an overview on performance verification of the U8903B. It also includes a list of recommended test equipment.

  • Page 18: Performance Verification Overview Introduction

    Performance Verification Overview Introduction This section provides a brief overview for verifying the performance of the U8903B. Performance verifications allow you to verify that the U8903B is operating within its published specifications. Figure 1-1 illustrates the process flow for carrying out the self-test, performance tests, and repair.

  • Page 19: Self-Test

    If all tests pass, you have a high confidence that the U8903B is operational. Keysight Calibration Services When your U8903B is due for calibration, contact your local Keysight Service Center for a low-cost recalibration. The U8903B is supported on automated calibration and adjustment systems, which allow Keysight to provide this service at competitive prices.

  • Page 20: Recommended Test Equipment

    Keysight DSO8104A 50 Ω terminator – – Shorting cap (BNC) – – Computer – GPIB/USB/LAN and APIB connections BNC cable Keysight U8903B-101 1.2 m XLR cable Keysight U8903B-102 BNC-to-banana jack adapter – – BNC-T adapter – – Keysight U8903B Service Guide...

  • Page 21: Test Consideration

    – The verification and adjustment procedures are based on the assumption that the recommended test equipment is being used. Substituting with an alternative test equipment may require modification of some procedures. Keysight U8903B Service Guide...
  • Page 22 Performance Verification Overview THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...

  • Page 23: Performance Verification For Analog Generator

    Sine wave amplitude accuracy and flatness verification Sine wave frequency accuracy verification Crosstalk verification Square wave rise time verification Square wave amplitude accuracy verification The performance verification procedures described in this chapter verify that the U8903B analog generator is operating within its published specifications.

  • Page 24: Introduction

    Performance Verification for Analog Generator Introduction This section lists the procedures to test the electrical performance of the U8903B analog generator using the published specifications given in the U8903B Performance Audio Analyzer User’s Guide (U8903-90045) as the performance standards. If the analog generator fails any of the tests or if any abnormal test results are obtained, adjustment will need to be carried out accordingly.

  • Page 25: Performance Verification

    Performance Verification for Analog Generator Performance Verification DC accuracy verification This test verifies the accuracy of the DC signal generated by the U8903B over a range of amplitudes using two digital multimeters to ensure that it is within the published specification.

  • Page 26: Sine Wave Amplitude Accuracy And Flatness Verification

    – Output grounding configuration: Floating ground – Waveform: DC – Output state: ON 4 Set both the U8903B output channel 1 and channel 2 to be tested to produce DC voltage with amplitude of V as given in the “Test record for DC accuracy verification”...

  • Page 27: Figure 2-2 U8903B To Digital Multimeter Connections For Sine Wave Amplitude Accuracy And Flatness Verification

    – Waveform: Sine – Output state: ON 4 Set both the U8903B output channel 1 and channel 2 to be tested to output a frequency of 1000 Hz. 5 Set both the U8903B output channel 1 and channel 2 to be tested to output an amplitude of V as given in the “Test record for sine wave amplitude accuracy...
  • Page 28 U8903B output channel to be tested. 11 Disable the output of U8903B. 12 Set both the U8903B output channel 1 and channel 2 to be tested to output an amplitude of 1 V. 13 Set both the U8903B output channel 1 and channel 2 to be tested to output a frequency of 1000 Hz (first frequency point in “Test record for flatness verification”...

  • Page 29: Sine Wave Frequency Accuracy Verification

    Performance Verification for Analog Generator Sine wave frequency accuracy verification This test verifies the sine wave frequency accuracy of the signal generated by the U8903B using a frequency counter to ensure that it is within the published specification. Table 2-3...

  • Page 30: Crosstalk Verification

    – Output amplitude: 1 Vrms – Output state: ON 4 Set both the U8903B output channel 1 and channel 2 to be tested to produce a sine wave with amplitude of 1 Vrms and frequency of f as given in the “Test record for frequency accuracy verification”...

  • Page 31: Figure 2-4 U8903B Audio Analyzer Connections For Crosstalk Verification

    6 Set the U8903B analyzer Measured channel input impedance to 300 Ω and analyzer input range to 0.32 Vrms. 7 On the U8903B generator, set the Driving channel output amplitude of Vrms as given in the “Test record for crosstalk verification” on page and the Measured channel output amplitude to 0 Vrms.

  • Page 32: Square Wave Rise Time Verification

    Square wave rise time verification In this test, the U8903B generates a square wave swept over a set of frequencies, and the rise time is measured using a Keysight DSO8064A/8104A digital oscilloscope to ensure that it is within the published specification.
  • Page 33 – Waveform: Square – Output state: ON 4 Set the U8903B output channel 1 and 2 to be tested to produce a square wave with amplitude of V as given in the “Test record for square wave rise time verification”...

  • Page 34: Square Wave Amplitude Accuracy Verification

    Square wave amplitude accuracy verification This test verifies the amplitude accuracy of the square wave signal generated by the U8903B over a range of amplitudes using two digital multimeters to ensure that it is within the published specification. Table 2-6...
  • Page 35 – Waveform: Square – Output state: ON 4 Set both the U8903B output channels to be tested to produce a square wave with amplitude of V and frequency of 1 kHz as given in the “Test record for square wave amplitude accuracy verification”...
  • Page 36 Performance Verification for Analog Generator THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...

  • Page 37: 3 Performance Verification For Analog Analyzer

    CMRR verification Distortion (THD+N) verification SMTPE IMD verification DFD verification Residual noise verification Wideband AC flatness verification Wideband frequency accuracy verification The performance verification procedures described in this chapter verify that the U8903B analog analyzer is operating within its published specifications.

  • Page 38: Performance Verification For Analog Analyzer

    Performance Verification for Analog Analyzer Introduction This section lists the procedures to test the electrical performance of the U8903B analog analyzer using the published specifications given in the U8903B Performance Audio Analyzer User’s Guide (U8903-90045) as the performance standards. If the analog analyzer fails any of the tests or if any abnormal test results are obtained, adjustment will need to be carried out accordingly.

  • Page 39: Performance Verification

    2 Configure the calibrator as follows: – Output state: Standby 3 Configure the U8903B input channels, channel 1 (3, 5, or 7) and channel 2 (4, 6, or 8) as shown in Figure 3-1 to be tested as follows: – Connection type: Unbalanced –...

  • Page 40: Ac Accuracy And Flatness Verification

    U8903B input channels to be tested. 9 Repeat step 2 to step 8 to complete the verification of the remaining U8903B input channels. 10 Compare the recorded DC accuracy values to the specification. If the test fails, adjustment will need to be carried out accordingly.

  • Page 41: Figure 3-2 Calibrator To U8903B Connection For Ac Accuracy And Flatness Verification

    2 Configure the calibrator as follows: – Output state: Standby 3 Configure the U8903B input channels, channel 1 (3, 5, or 7) and channel 2 (4, 6, or 8) as shown in Figure 3-2 to be tested as follows: – Connection type: Unbalanced –...

  • Page 42: Frequency Accuracy Verification

    U8903B and frequency counter inputs. 2 Connect the function generator outputs to the frequency counter input channel 1 and 2, and to the U8903B unbalanced input channel 1 and 2 as shown in Figure 3-3. Preset the U8903B, function generator, and frequency counter.

  • Page 43: Figure 3-3 Function Generator To Frequency Counter And U8903B Connection For Frequency Accuracy Verification

    Unbalanced input channel 2, 4, 6, 8 Frequency counter Figure 3-3 Function generator to frequency counter and U8903B connection for frequency accuracy verification 3 Configure the function generator output channel as follows: – Output load: High-Z load – Output polarity: Normal –...

  • Page 44: Phase Accuracy Verification

    “Test record for frequency accuracy verification” on page 111. 7 Set the U8903B input channels sample size as given in the “Test record for frequency accuracy verification” on page 111. 8 Set the frequency counter gate time as given in the “Test record for frequency accuracy verification”...

  • Page 45: Figure 3-4 Function Generator To U8903B Connection For Phase Accuracy Verification

    Performance Verification for Analog Analyzer 1 Connect the function generator to the U8903B input channel 1 (3, 5, or 7) and 2 (4, 6, or 8) via the Unbalanced connection as shown in Figure 3-4. The BNC-to-banana jack adapter and the BNC male-to-female T splitter is used for this connection. Preset both the U8903B and function generator.

  • Page 46: Crosstalk Verification

    U8903B input channel 2 (4, 6, or 8). 8 Repeat step 1 to step 7 to complete the verification of the other U8903B input channels. 9 Compare the recorded phase accuracy values to the specification. If the test fails, adjustment will need to be carried out accordingly.
  • Page 47 1 (3, 5, or 7) in which the Driving channel is channel 2 (4, 6, or 8) and the Measured channel is channel 1 (3, 5, or 7). 13 Repeat step 1 to step 12 to complete the verification of the other U8903B input channels.

  • Page 48: Cmrr Verification

    Audio generator to U8903B connection for CMRR verification 3 Configure the calibrator as follows: – Output state: Standby 4 Configure the U8903B input channel 1 (3, 5, or 7) and channel 2 (4, 6, or 8) to be tested as follows: – Connection type: Balanced –...
  • Page 49 “Test record for CMRR verification” on page 113. 8 On the U8903B graph analysis mode, set the graph Marker 1 state to ON and assign it to Trace 1 (3, 5, or 7). Set the graph Marker 2 state to ON and assign it to Trace 2 (4, 6, or 8).

  • Page 50: Distortion (Thd+N) Verification

    16 Compare the recorded CMRR values to the specification. If the test fails, adjustment will need to be carried out accordingly. Distortion (THD+N) verification This test verifies if the residual THD+N of the U8903B is within the published specification using an internal loopback connection to test the THD+N performance. Table 3-7...

  • Page 51: Smtpe Imd Verification

    SMTPE IMD verification This test verifies the SMTPE IMD performance of the U8903B analyzer by using an internal loopback connection to ensure that it is within the published specification. Table 3-8...
  • Page 52 – Input Auto Range: ON – IMD Frequency Detection Mode: Generator frequency lock 4 On the U8903B generator, set the waveform to the first SMPTE function as given in the “Test record for SMPTE IMD verification” on page 115. 5 On the U8903B generator, set the upper frequency to 7 kHz. Set the lower frequency and the amplitude of Vrms as given in the “Test record for SMPTE IMD verification”...

  • Page 53: Dfd Verification

    Vrms as given in “Test record for DFD verification” on page 116. 5 On the U8903B analyzer input channels, set the input range as given in “Test record for DFD verification” on page 116. Keysight U8903B Service Guide...

  • Page 54: Residual Noise Verification

    Residual noise verification This test verifies if the residual noise of the U8903B is within the published specification by using shorting connectors to terminate the U8903B input channels and measuring its own residual noise.

  • Page 55: Wideband Ac Flatness Verification

    Wideband AC flatness verification This test verifies the wideband sine wave flatness of the U8903B analyzer by using the function generator as a source and the digital multimeter as a reference, to ensure that it is within the published specification.

  • Page 56: Figure 3-7 Function Generator To U8903B And Digital Multimeter For Wideband Sine Wave Flatness Verification

    U8903B audio Function generator analyzer Digital Multimeter Figure 3-7 Function generator to U8903B and digital multimeter for wideband sine wave flatness verification 2 Configure the digital multimeter as follows: – Measurement function: AC voltage – Level Filter: Enable – NPLC: 10 –...

  • Page 57: Wideband Frequency Accuracy Verification

    6 On the digital multimeter, set the range as given in the “Test record for wideband sine wave flatness verification” on page 117. 7 On the U8903B analyzer, set the input range as given in the “Test record for wideband sine wave flatness verification” on page 117.

  • Page 58: Figure 3-8 Function Generator To Frequency Counter And U8903B Connection For Wideband Frequency Accuracy Verification

    Performance Verification for Analog Analyzer 2 Connect the function generator outputs to the frequency counter input channel 1 and 2, and to the U8903B unbalanced input channel 1 and 2 as shown in Figure 3-8. Preset the U8903B, function generator, and frequency counter.
  • Page 59 U8903B input channel 1 to be tested. 13 Repeat step 1 to step 12 to complete the verification for the U8903B input channel 2. 14 Compare the recorded wideband frequency accuracy values to the specification. If the...
  • Page 60 Performance Verification for Analog Analyzer THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...
  • Page 61 Unbalanced output level accuracy verification Unbalanced input sampling rate accuracy verification Unbalanced output sampling rate accuracy verification The performance verification procedures described in this chapter verify that the U8903B digital analyzer and digital generator is operating within its published specifications.

  • Page 62: Performance Verification For Digital Generator And Digital Analyzer

    AES3 and SPDIF digital audio interfaces (fixed perpetual license). N3436A DSI digital audio interface (fixed perpetual license). Refer to the U8903B Audio Analyzer User’s Guide (U8903- 90045) for more information on NOTE the AES3, SPDIF, and DSI interfaces specifications. Keysight U8903B Service Guide...

  • Page 63: Performance Verification

    Equipment used ±5 ppm Frequency counter 1 Connect the Keysight 53132A/53220A frequency counter input channel 1 to the U8903B DSI MCLK output line using the DB25 to BNC cable as shown in Figure 4-1. DB25 to BNC MCLK output cable...
  • Page 64 Set the DSI audio resolution based on the Word Length as given in “Test record for DSI master clock output frequency accuracy verification” on page 128. Set the DSI audio word length to 32 bits. Keysight U8903B Service Guide...
  • Page 65 7 Verification steps for word length at 20 bits: Set the DSI audio resolution to 20 bits. b Set the DSI audio word length to 20 bits. Set the DSI Master Clock multiplier to 160. Keysight U8903B Service Guide...
  • Page 66 Compute the master clock error using the following equation. MCLK is the master clock rate calculated where MCLK = MUL × Sampling Rate (Hz). Δ × ppm = [(F – MCLK) / MCLK] 1000000 error measure Keysight U8903B Service Guide...
  • Page 67 Set the DSI Master Clock Multiplier based on the Master Clock Multiplier as given in “Test record for DSI master clock output frequency accuracy verification” on page 128. Measure the Master Clock Rate twice and average the two measurements. Keysight U8903B Service Guide...

  • Page 68: Balanced Output Level Accuracy Verification

    Balanced output level accuracy verification This test measures the balanced output level accuracy on the balanced digital audio output of the U8903B using the Keysight DSO8064A oscilloscope to ensure that it is within the published specification. Table 4-3 Balanced output level accuracy specification...

  • Page 69: Table 4-4 Channel 1 And Channel 2 Vertical Scale And Vertical Scale Range

    – Function 1 to subtract channel 1 and channel 2 – Function 1: Enable – Function 1 offset: 0 3 Configure the U8903B digital output channel to be tested as follows: – Digital output type: Balanced – Digital output voltage: 2.5 V –...
  • Page 70 10 Repeat step 4 to step 9 for the rest of the F as given in “Test record for balanced output level accuracy verification” on page to complete the verification of the different sampling rates. Keysight U8903B Service Guide...

  • Page 71: Balanced Input Sampling Rate Accuracy Verification

    1 Connect the Keysight 53132A/53220A frequency counter input channel 1 and 2 to the U8903B Balanced digital output channel using the XLR female to two BNC male split AES cable with separated + and – output lines as shown in Figure 4-3.

  • Page 72: Figure 4-4 U8903B Balanced Digital Output To Its Own Balanced Digital Input For Bal- Anced Input Sampling Rate Accuracy Verification

    11 Connect the U8903B Balanced digital output to its own balanced digital input using the AES cable as shown in Figure 4-4. Balanced...
  • Page 73 13 Set the digital output sampling rate F as given in “Test record for balanced input sampling rate accuracy verification” on page 147. 14 Set the U8903B digital analyzer to measure the sampling rate and record the measurement reading as SR meas...

  • Page 74: Balanced Output Sampling Rate Accuracy Verification

    1 Connect the Keysight 53132A/53220A frequency counter input channel 1 and 2 to the U8903B balanced digital output channel using the XLR female to two BNC male split AES cable with separated + and – output lines as shown in Figure 4-5.
  • Page 75 – SINE waveform amplitude: 1 FFS – Digital output state: ON 4 Set the U8903B calibration digital output mode to BCOM mode for AES/SPDIF. 5 Set the digital output sampling rate F as given in “Test record for balanced output sampling rate accuracy verification”...

  • Page 76: Unbalanced Output Level Accuracy Verification

    Performance Verification for Digital Generator and Digital Analyzer Unbalanced output level accuracy verification This test measures the level accuracy on the Unbalanced digital audio output of the U8903B using DSO8064A digital oscilloscope to ensure that it is within the published specification. Table 4-7...

  • Page 77: Table 4-8 Channel 1 Vertical Scale Settings

    10 Repeat step 4 to step 9 for the rest of the F as given in “Test record for unbalanced output level accuracy verification” on page to complete the verification of the different sampling rates. Keysight U8903B Service Guide...

  • Page 78: Unbalanced Input Sampling Rate Accuracy Verification

    Unbalanced input sampling rate accuracy verification This test measures the sampling rate accuracy on the unbalanced digital audio input of the U8903B using the Keysight 53132A/53220A frequency counter and its own digital audio unbalanced generator to ensure that it is within the published specification.

  • Page 79: Figure 4-8 U8903B Unbalanced Digital Output To Its Own Unbalanced Digital Input For Unbalanced Input Sampling Rate Accuracy Verification

    11 Connect the U8903B unbalanced digital output to its own balanced digital input using the SPDIF or 75 Ω impedance cable as shown in Figure 4-8. Unbalanced digital output SPDIF or 75 Ω...
  • Page 80 13 Set the digital output sampling rate F as given in “Test record for unbalanced input sampling rate accuracy verification” on page 155. 14 Set the U8903B digital analyzer to measure the sampling rate and record the measurement reading as SR meas...

  • Page 81: Unbalanced Output Sampling Rate Accuracy Verification

    Performance Verification for Digital Generator and Digital Analyzer Unbalanced output sampling rate accuracy verification This test measures the sampling rate accuracy on the unbalanced digital audio output of the U8903B using the Keysight 53132A/53220A frequency counter to ensure that it is within the published specification. Table 4-10...
  • Page 82 Performance Verification for Digital Generator and Digital Analyzer 4 Set the U8903B calibration digital output mode to BCOM mode for AES/SPDIF. 5 Set the digital output sampling rate F as given in “Test record for unbalanced output sampling rate accuracy verification” on page 158.

  • Page 83: Performance Verification For Bluetooth Card

    U8903B Bluetooth Test Description Handsfree Profile (HFP) test description Advanced Audio Distribution Profile (A2DP) test description U8903B Bluetooth Retest Procedure The performance verification procedures described in this chapter verify that the U8903B ® Bluetooth card is operating within its published specifications.

  • Page 84: U8903B Bluetooth Options

    Bluetooth card with 2 RF connectors at a secondary option slot. U8903B-BL2 This is only applicable when U8903B-AN8 is selected. Refer to the U8903B Audio Analyzer User’s Guide (U8903- 90045) for more information on NOTE the Bluetooth interfaces specifications. Keysight U8903B Service Guide...

  • Page 85: U8903B Bluetooth Card Verification

    7 Set the Device Under Test (DUT) GPIB address to 28. Test procedure: 1 Connect the Keysight U8903B Tester RF1 port to the DUT RF1 port using the N-type (male) to N-type (male) RF cable as shown in Figure 5-1.

  • Page 86: Figure 5-2 Unit Id Text Box

    4 Click Connect Instruments to establish the connection between the U8903B Tester unit and the DUT. A green box on the U8903B-BT Tester will appear as shown in Figure 5-3 if the U8903B Tester unit is detected and is able to communicate on the GPIB bus.

  • Page 87: Figure 5-5 Dut Hardware And Software Information

    9 Select the checkbox for every test in the VEE test program to run a full test. 10 Click Run Selected Test to begin the testing procedure. 11 A pop-up window will appear as a reminder to properly connect the U8903B Tester unit to the DUT as shown in Figure 5-7.

  • Page 88: U8903B Bluetooth Test Description

    Performance Verification for Bluetooth Card U8903B Bluetooth Test Description The U8903B Bluetooth card supports two Bluetooth audio profiles which are the Handsfree Profile (HFP) and the Advanced Audio Distribution Profile (A2DP). The VEE test program is used to test these two profiles for their functionality. The tests focus on profile connectivity as well as audio generation and measurement functionality.

  • Page 89: Figure 5-9 U8903B Bluetooth Test For Hfp Profile (Bt Role: Responder, Audio Role: Hf)

    Figure 5-9 U8903B Bluetooth test for HFP profile (BT Role: Responder, Audio Role: HF) – The second set of Bluetooth tests for the HFP profile is performed with the DUT’s Bluetooth profile role configured as Responder and the audio role configured as Handsfree.

  • Page 90: Table 5-2 Hfp Bluetooth Audio Test Points And Limits For Analyzer And Generator

    THD+N ratio limit (dB) limit (dB) 1000 ±10 ±0.3 ≤-30 ±10 ±0.3 ≤-30 ±10 ±0.3 ≤-30 ±10 ±0.3 ≤-30 ±10 ±0.3 ≤-30 2000 ±10 ±0.3 ≤-30 3000 ±10 ±0.3 ≤-30 3600 ±10 ±0.3 ≤-30 5000 ±10 ±0.3 ≤-30 Keysight U8903B Service Guide...

  • Page 91: Advanced Audio Distribution Profile (A2Dp) Test Description

    Advanced Audio Distribution Profile (A2DP) test description Figure 5-10 U8903B Bluetooth test for A2DP profile (BT Role: Initator, Audio Role: SRC) – The first set of Bluetooth tests for the A2DP profile is performed with the DUT’s Bluetooth profile role configured as Initiator and the audio role configured as Source.

  • Page 92: Figure 5-11 U8903B Bluetooth Test For A2Dp Profile (Bt Role: Responder, Audio Role: Snk)

    Performance Verification for Bluetooth Card Figure 5-11 U8903B Bluetooth test for A2DP profile (BT Role: Responder, Audio Role: SNK) – The second set of Bluetooth tests for the A2DP profile is performed with the DUT’s Bluetooth profile role configured as Responder and the audio role configured as Sink.

  • Page 93: Table 5-4 A2Dp Bluetooth Audio Test Points And Limits For Analyzer And Generator

    A2DP APTX functional test points and limits for analyzer and generator Amplitude accuracy Frequency (Hz) Amplitude (FFS) Frequency limit (ppm) THD+N ratio limit (dB) limit (dB) 1000 ±130 -0.3 to 0.1 ≤-45 ±130 -0.8 to 0 ≤-45 18000 ±130 -1 to 0 ≤-18 Keysight U8903B Service Guide...

  • Page 94: U8903B Bluetooth Retest Procedure

    Figure 5-12, select the appopriate tests and include any prerequisite tests shown in Table 5-6. Figure 5-12 U8903B Bluetooth retest procedure Table 5-6 U8903B Bluetooth test to be repeated and its prerequisite Test number to be repeated Test number that needs to be included 1a and/or 1b 2a and/or 2b...
  • Page 95 Performance Verification for Bluetooth Card Table 5-6 U8903B Bluetooth test to be repeated and its prerequisite (continued) Test number to be repeated Test number that needs to be included 5a and/or 5b 4 and 5 4 and 5 9a and/or 9b –...
  • Page 96 Performance Verification for Bluetooth Card THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...

  • Page 97: Table A-8 Test Record For Dc Accuracy Verification

    Keysight U8903B Audio Analyzer Service Guide Appendix A Analog Generator Performance Verification Test record for DC accuracy verification Test record for sine wave amplitude accuracy verification Test record for flatness verification Test record for frequency accuracy verification Test record for crosstalk verification...

  • Page 98: Analog Generator Performance Verification

    (Channel 1) (Channel 2) (Channel 1) (Channel 2) –10.00 –9.75 –9.50 –9.25 –9.00 –8.75 –8.50 –8.25 –8.00 –7.75 –7.50 –7.25 –7.00 –6.75 –6.50 –6.25 –6.00 –5.75 –5.50 –5.25 –5.00 –4.75 –4.50 –4.25 –4.00 –3.75 –3.50 –3.25 –3.00 Keysight U8903B Service Guide...
  • Page 99 (Channel 1) (Channel 2) –2.75 –2.50 –2.25 –2.00 –1.75 –1.50 –1.25 –1.00 –0.75 –0.50 –0.25 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75 4.00 4.25 4.50 4.75 5.00 5.25 5.50 Keysight U8903B Service Guide...

  • Page 100: Test Record For Sine Wave Amplitude Accuracy Verification

    Test record for sine wave amplitude accuracy verification (Vrms) (Vrms) Digital multimeter AC accuracy (%) AC accuracy (%) range (Channel 1) (Channel 2) (Channel 1) (Channel 2) 0.008 0.01 0.01 0.01 0.015 0.02 0.03 0.04 0.05 0.08 Keysight U8903B Service Guide...

  • Page 101: Test Record For Flatness Verification

    Test record for flatness verification Table A-3 Test record for flatness verification (Vrms) (Vrms) Digital mul timeter Flatness (dB) Flatness (dB) (Hz) range (Channel 1) (Channel 2) (Channel 1) (Channel 2) 1000 12250 18250 20000 30000 40000 50000 60000 Keysight U8903B Service Guide...

  • Page 102: Test Record For Frequency Accuracy Verification

    Test record for crosstalk verification Generator output amplitude Analyzer input range Crosstalk (dB) Crosstalk (dB) (Hz) (Vrms) (Channel 1 to Channel 2) (Channel 2 to Channel 1) 0.32 0.32 1000 0.32 0.32 20000 1000 20000 1000 20000 Keysight U8903B Service Guide...

  • Page 103: Test Record For Square Wave Rise Time Verification

    1 / 6 20000 1 / 6 6.6667 30000 4.5 / 6 4.5 / 6 1000 4.5 / 6 2000 4.5 / 6 5000 4.5 / 6 10000 4.5 / 6 20000 4.5 / 6 6.6667 30000 Keysight U8903B Service Guide...

  • Page 104: Test Record For Square Wave Amplitude Accuracy Verification

    Table A-7 Test record for square wave amplitude accuracy verification (Vrms) (Vrms) Digital multimeter Amplitude accuracy (%) Amplitude accuracy (%) range (Channel 1) (Channel 2) (Channel 1) (Channel 2) 0.01 0.015 0.02 0.03 0.04 0.05 0.08 0.15 Keysight U8903B Service Guide...

  • Page 105: Analog Analyzer Performance Verification

    7 and 8. Table A-8 Test record for DC accuracy verification U8903B input range DC accuracy (%) DC accuracy (%) (Channel 1) (Channel 2) (Channel 1) (Channel 2) –140 –100 –32 –10 –3.2 –1 –0.32 0.32 0.32 0.32 Keysight U8903B Service Guide...

  • Page 106: Test Record For Ac Accuracy And Flatness Verification

    70000 − − 0.32 80000 − − 0.32 82275 − − 0.32 85625 − − 0.32 88275 − − 0.32 90000 − − 1000 − − − − − − 2250 − − 8250 − − Keysight U8903B Service Guide...
  • Page 107 15000 − − 20000 − − 30000 − − 40000 − − 50000 − − 60000 − − 70000 − − 80000 − − 82275 − − 85625 − − 88275 − − 90000 − − Keysight U8903B Service Guide...
  • Page 108 − − 1000 − − − − − − 2250 − − 8250 − − 10000 − − 15000 − − 20000 − − 30000 − − 40000 − − 50000 − − 60000 − − Keysight U8903B Service Guide...
  • Page 109 − − 70000 − − 80000 − − 82275 − − 85625 − − 88275 − − 90000 − − 1000 − − − − − − 2250 − − 8250 − − 10000 − − Keysight U8903B Service Guide...
  • Page 110 15000 − − 20000 − − 30000 − − 40000 − − 50000 − − 60000 − − 70000 − − 80000 − − 82275 − − 85625 − − 88275 − − 90000 − − Keysight U8903B Service Guide...

  • Page 111: Test Record For Frequency Accuracy Verification

    Test record for phase accuracy verification Use the test record below for the remaining test channels 3 and 4, channels 5 and 6, and NOTE channels 7 and 8. Table A-11 Test record for phase accuracy verification (Hz) Phase accuracy (°) Keysight U8903B Service Guide...

  • Page 112: Test Record For Crosstalk Verification

    Use the test record below for the remaining test channels 3 and 4, channels 5 and 6, and NOTE channels 7 and 8. Table A-12 Test record for crosstalk verification Crosstalk (dB) Crosstalk (dB) (Hz) U8903B input range (V) (Channel 1 to Channel 2) (Channel 2 to Channel 1) 0.32 0.32 1000 0.32 0.32...

  • Page 113: Test Record For Cmrr Verification

    19800 20200 1000 1200 10000 9800 10200 20000 19800 20200 1000 1200 10000 9800 10200 20000 19800 20200 1000 1200 10000 9800 10200 20000 19800 20200 1000 1200 10000 9800 10200 20000 19800 20200 1000 1200 Keysight U8903B Service Guide...

  • Page 114: Test Record For Distortion Verification

    (Hz) (Trace 1) (Trace 2) (Trace 1) (Trace 2) 10000 9800 10200 20000 19800 20200 Test record for distortion verification Table A-14 Test record for distortion verification Distortion (dB) Distortion (dB) (Channel 1) (Channel 2) Keysight U8903B Service Guide...

  • Page 115: Test Record For Smpte Imd Verification

    SMPTe41 SMPTE 4 to 1 SMPTe41 SMPTE 10 to 1 SMPTe101 SMPTE 10 to 1 SMPTe101 SMPTE 10 to 1 SMPTe101 SMPTE 10 to 1 SMPTe101 SMPTE 10 to 1 SMPTe101 SMPTE 10 to 1 SMPTe101 Keysight U8903B Service Guide...

  • Page 116: Test Record For Dfd Verification

    Test record for DFD verification Table A-16 Test record for DFD verification Generator output U8903B input (Hz) amplitude (Vrms) range (V) (Channel 1) (Channel 1) (Channel 2) (Channel 2) 3150 4000 5000 6300 8000 10000 12500 16000 20000 Keysight U8903B Service Guide...

  • Page 117: Test Record For Residual Noise Verification

    (Channel 2) range (V) (Channel 1) (Channel 2) 0.32 1000 0.32 0.32 0.32 0.32 0.32 2250 0.32 5250 0.32 10000 0.32 30000 0.32 50000 0.32 70000 0.32 90000 0.32 95000 0.32 100000 0.32 200000 0.32 300000 Keysight U8903B Service Guide...
  • Page 118 800000 0.32 900000 0.32 1000000 0.32 1050000 0.32 1100000 0.32 1150000 0.32 1200000 0.32 1250000 0.32 1300000 0.32 1350000 0.32 1400000 0.32 1450000 0.32 1500000 1000 2250 5250 10000 30000 50000 70000 90000 95000 100000 200000 Keysight U8903B Service Guide...
  • Page 119 (Channel 2) range (V) (Channel 1) (Channel 2) 300000 400000 500000 600000 700000 800000 900000 1000000 1050000 1100000 1150000 1200000 1250000 1300000 1350000 1400000 1450000 1500000 1000 2250 5250 10000 30000 50000 70000 90000 95000 100000 Keysight U8903B Service Guide...
  • Page 120 (Channel 2) range (V) (Channel 1) (Channel 2) 200000 300000 400000 500000 600000 700000 800000 900000 1000000 1050000 1100000 1150000 1200000 1250000 1300000 1350000 1400000 1450000 1500000 1000 2250 5250 10000 30000 50000 70000 90000 95000 Keysight U8903B Service Guide...
  • Page 121 (Channel 2) range (V) (Channel 1) (Channel 2) 100000 200000 300000 400000 500000 600000 700000 800000 900000 1000000 1050000 1100000 1150000 1200000 1250000 1300000 1350000 1400000 1450000 1500000 1000 2250 5250 10000 30000 50000 70000 90000 Keysight U8903B Service Guide...
  • Page 122 (Channel 2) range (V) (Channel 1) (Channel 2) 95000 100000 200000 300000 400000 500000 600000 700000 800000 900000 1000000 1050000 1100000 1150000 1200000 1250000 1300000 1350000 1400000 1450000 1500000 1000 2250 5250 10000 30000 50000 70000 Keysight U8903B Service Guide...
  • Page 123 (Channel 2) range (V) (Channel 1) (Channel 2) 90000 95000 100000 200000 300000 400000 500000 600000 700000 800000 900000 1000000 1050000 1100000 1150000 1200000 1250000 1300000 1350000 1400000 1450000 1500000 1000 2250 5250 10000 30000 50000 Keysight U8903B Service Guide...
  • Page 124 (Channel 1) (Channel 2) (Channel 1) (Channel 2) range (V) (Channel 1) (Channel 2) 70000 90000 95000 100000 200000 300000 400000 500000 600000 700000 800000 900000 1000000 1050000 1100000 1150000 1200000 1250000 1300000 1350000 1400000 1450000 1500000 Keysight U8903B Service Guide...

  • Page 125: Test Record For Wideband Frequency Accuracy Verification

    (Channel 2) (Channel 1) (Channel 2) 100000 262144 200000 262144 300000 262144 400000 262144 500000 262144 600000 262144 700000 262144 800000 262144 900000 262144 1000000 262144 1100000 262144 1200000 262144 1300000 262144 1400000 262144 1500000 262144 Keysight U8903B Service Guide...
  • Page 126 Appendix A THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...

  • Page 127: Table B-1 Test Record For Dsi Master Clock Output Frequency Accuracy Verification

    Keysight U8903B Audio Analyzer Service Guide Appendix B Digital Generator and Digital Analyzer Performance Verification Test record for DSI master clock output frequency accuracy verification Test record for balanced output level accuracy verification Test record for balanced input sampling rate accuracy verification...

  • Page 128: Digital Generator And Digital Analyzer Performance Verification

    12500 1600000 12500 3200000 12500 6400000 12500 1024 12800000 16000 2048000 16000 4096000 16000 8192000 16000 1024 16384000 22050 2822400 22050 5644800 22050 11289600 22050 1024 22579200 28800 3686400 28800 7372800 28800 14745600 28800 1024 29491200 Keysight U8903B Service Guide...
  • Page 129 96000 24576000 100000 12800000 100000 25600000 176400 22579200 192000 24576000 200000 25600000 6750 648000 6750 1296000 6750 2592000 6750 5184000 8000 768000 8000 1536000 8000 3072000 8000 6144000 11030 1058880 11030 2117760 11030 4235520 11030 8471040 Keysight U8903B Service Guide...
  • Page 130 22050 16934400 28800 2764800 28800 5529600 28800 11059200 28800 22118400 32000 3072000 32000 6144000 32000 12288000 32000 24576000 44100 4233600 44100 8467200 44100 16934400 44100 33868800 48000 4608000 48000 9216000 48000 18432000 48000 36864000 50000 4800000 Keysight U8903B Service Guide...
  • Page 131 200000 19200000 200000 38400000 250000 24000000 384000 36864000 400000 38400000 6750 864000 6750 1728000 6750 3456000 8000 512000 8000 1024000 8000 2048000 8000 4096000 11030 705920 11030 1411840 11030 2823680 11030 5647360 12500 800000 12500 1600000 Keysight U8903B Service Guide...
  • Page 132 32000 4096000 32000 8192000 32000 16384000 44100 2822400 44100 5644800 44100 11289600 44100 22579200 48000 3072000 48000 6144000 48000 12288000 48000 24576000 50000 3200000 50000 6400000 50000 12800000 50000 25600000 88200 5644800 88200 11289600 88200 22579200 Keysight U8903B Service Guide...
  • Page 133 6750 1080000 6750 2160000 6750 4320000 8000 640000 8000 1280000 8000 2560000 8000 5120000 11030 882400 11030 1764800 11030 3529600 11030 7059200 12500 1000000 12500 2000000 12500 4000000 12500 8000000 16000 1280000 16000 2560000 16000 5120000 Keysight U8903B Service Guide...
  • Page 134 44100 14112000 44100 28224000 48000 3840000 48000 7680000 48000 15360000 48000 30720000 50000 4000000 50000 8000000 50000 16000000 50000 32000000 88200 7056000 88200 14112000 88200 28224000 96000 7680000 96000 15360000 96000 30720000 100000 8000000 100000 16000000 Keysight U8903B Service Guide...
  • Page 135 8000 3072000 8000 6144000 11030 1058880 11030 2117760 11030 4235520 11030 8471040 12500 1200000 12500 2400000 12500 4800000 12500 9600000 16000 1536000 16000 3072000 16000 6144000 16000 12288000 22050 2116800 22050 4233600 22050 8467200 22050 16934400 Keysight U8903B Service Guide...
  • Page 136 48000 36864000 50000 4800000 50000 9600000 50000 19200000 50000 38400000 88200 8467200 88200 16934400 88200 33868800 96000 9216000 96000 18432000 96000 36864000 100000 9600000 100000 19200000 100000 38400000 176400 16934400 176400 33868800 192000 18432000 192000 36864000 Keysight U8903B Service Guide...
  • Page 137 11030 9882880 12500 1400000 12500 2800000 12500 5600000 12500 11200000 16000 1792000 16000 3584000 16000 7168000 16000 14336000 22050 2469600 22050 4939200 22050 9878400 22050 19756800 28800 3225600 28800 6451200 28800 12902400 28800 25804800 32000 3584000 Keysight U8903B Service Guide...
  • Page 138 88200 9878400 88200 19756800 88200 39513600 96000 10752000 96000 21504000 96000 43008000 100000 11200000 100000 22400000 100000 44800000 176400 19756800 176400 39513600 192000 21504000 192000 43008000 200000 22400000 200000 44800000 250000 28000000 384000 43008000 400000 44800000 Keysight U8903B Service Guide...
  • Page 139 2048000 16000 4096000 16000 8192000 16000 1024 16384000 22050 2822400 22050 5644800 22050 11289600 22050 1024 22579200 28800 3686400 28800 7372800 28800 14745600 28800 1024 29491200 32000 4096000 32000 8192000 32000 16384000 44100 5644800 44100 11289600 Keysight U8903B Service Guide...
  • Page 140 (MUL) rate (MCLK) 44100 22579200 48000 6144000 48000 12288000 48000 24576000 50000 6400000 50000 12800000 50000 25600000 88200 11289600 88200 22579200 96000 12288000 96000 24576000 100000 12800000 100000 25600000 176400 22579200 192000 24576000 200000 25600000 Keysight U8903B Service Guide...

  • Page 141: Test Record For Balanced Output Level Accuracy Verification

    Test record for balanced output level accuracy verification Sampling rate F (kHz) Level accuracy (dB) measure 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 Keysight U8903B Service Guide...
  • Page 142 Test record for balanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 Keysight U8903B Service Guide...
  • Page 143 Appendix B Table B-2 Test record for balanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 Keysight U8903B Service Guide...
  • Page 144 Appendix B Table B-2 Test record for balanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 176.4 176.4 176.4 176.4 Keysight U8903B Service Guide...
  • Page 145 Table B-2 Test record for balanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 Keysight U8903B Service Guide...
  • Page 146 Appendix B Table B-2 Test record for balanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure Keysight U8903B Service Guide...

  • Page 147: Test Record For Balanced Input Sampling Rate Accuracy Verification

    Test record for balanced input sampling rate accuracy verification Table B-3 Test record for balanced input sampling rate accuracy verification Sampling rate F (kHz) (kHz) measure1 measure2 (kHz) (kHz) (ppm) Impedance (W) SRavg meas SRerror (kHz) (Channel 1) (Channel 2) 28.8 44.1 88.2 Keysight U8903B Service Guide...
  • Page 148 (kHz) (Channel 1) (Channel 2) 176.4 28.8 Hi-Z Hi-Z Hi-Z Hi-Z 44.1 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z 88.2 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Keysight U8903B Service Guide...
  • Page 149 Test record for balanced input sampling rate accuracy verification (continued) Sampling rate F (kHz) (kHz) measure1 measure2 (kHz) (kHz) (ppm) Impedance (W) SRavg meas SRerror (kHz) (Channel 1) (Channel 2) Hi-Z Hi-Z Hi-Z Hi-Z 176.4 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Keysight U8903B Service Guide...

  • Page 150: Test Record For Balanced Output Sampling Rate Accuracy Verification

    Test record for balanced output sampling rate accuracy verification Table B-4 Test record for balanced output sampling rate accuracy verification (kHz) (kHz) (ppm) (ppm) measure1 measure2 error1 error2 Sampling rate F (kHz) (Channel 1) (Channel 2) (Channel 1) (Channel 2) 28.8 44.1 88.2 Keysight U8903B Service Guide...
  • Page 151 Appendix B Table B-4 Test record for balanced output sampling rate accuracy verification (continued) (kHz) (kHz) (ppm) (ppm) measure1 measure2 error1 error2 Sampling rate F (kHz) (Channel 1) (Channel 2) (Channel 1) (Channel 2) 176.4 Keysight U8903B Service Guide...

  • Page 152: Test Record For Unbalanced Output Level Accuracy Verification

    Test record for unbalanced output level accuracy verification Sampling rate F (kHz) Level accuracy (dB) measure 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 28.8 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 44.1 Keysight U8903B Service Guide...
  • Page 153 Appendix B Table B-5 Test record for unbalanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure 44.1 44.1 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 88.2 Keysight U8903B Service Guide...
  • Page 154 Appendix B Table B-5 Test record for unbalanced output level accuracy verification (continued) Sampling rate F (kHz) Level accuracy (dB) measure 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 176.4 Keysight U8903B Service Guide...

  • Page 155: Test Record For Unbalanced Input Sampling Rate Accuracy Verification

    Test record for unbalanced input sampling rate accuracy verification Table B-6 Test record for unbalanced input sampling rate accuracy verification Sampling rate F (kHz) measure (kHz) (kHz) (ppm) Impedance (W) SR_FC meas SRerror (kHz) (Channel 1) 28.8 44.1 88.2 Keysight U8903B Service Guide...
  • Page 156 SRerror (kHz) (Channel 1) 176.4 28.8 Hi-Z Hi-Z Hi-Z Hi-Z 44.1 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z 88.2 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Keysight U8903B Service Guide...
  • Page 157 Test record for unbalanced input sampling rate accuracy verification (continued) Sampling rate F (kHz) measure (kHz) (kHz) (ppm) Impedance (W) SR_FC meas SRerror (kHz) (Channel 1) Hi-Z Hi-Z Hi-Z Hi-Z 176.4 Hi-Z Hi-Z Hi-Z Hi-Z Hi-Z Keysight U8903B Service Guide...

  • Page 158: Test Record For Unbalanced Output Sampling Rate Accuracy Verification

    Appendix B Test record for unbalanced output sampling rate accuracy verification Table B-7 Test record for unbalanced output sampling rate accuracy verification Sampling rate F (kHz) (kHz) (ppm) measure error 28.8 44.1 88.2 Keysight U8903B Service Guide...
  • Page 159 Appendix B Table B-7 Test record for unbalanced output sampling rate accuracy verification (continued) Sampling rate F (kHz) (kHz) (ppm) measure error 176.4 Keysight U8903B Service Guide...
  • Page 160 Appendix B THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...
  • Page 161 Keysight U8903B Audio Analyzer Service Guide Appendix C Modify a Cable for the U8903B CMRR test...

  • Page 162: Modify A Cable For The U8903B Cmrr Test

    Appendix C Modify a Cable for the U8903B CMRR test 1 Order the following parts as material: Table C-1 Parts to order Part Quantity U8903-61301, male XLR to female XLR, 2 m, Black 1 piece 8120-1840, BNC male to straight BNC 48-in 1 piece 2 Cut one end of the 8120-1840 BNC cable shown in Figure C-1.

  • Page 163: Figure C-4 De-Solder The Wires

    XLR pin 2 and 3. Solder the BNC shielding to XLR pin 1. Figure C-5 Solder the BNC cable to the male end of the XLR cable 7 Re-install the XLR metal body. Keysight U8903B Service Guide...
  • Page 164 Appendix C THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK. Keysight U8903B Service Guide...
  • Page 165 This information is subject to change without notice. Always refer to the English version at the Keysight Web site for the latest revision. © Keysight Technologies 2015 Edition 5, November 13, 2015 *U8903-90048* U8903-90048 www.keysight.com...

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