Keysight N5247B Series Service Manual
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Keysight N5247B Series Service Manual

Keysight N5247B Series Service Manual

2-port and 4-port pna-x microwave network analyzers
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N5247B 2-Port and 4-Port
PNA-X Microwave Network
Analyzers - Service Guide
N5247B Series -
(900 Hz /900 Hz/10 MHz - 67 GHz)
This is the Service Guide for the N5247B Series Microwave Network Analyzers.
SERVICE GUIDE
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Summary of Contents for Keysight N5247B Series

  • Page 1 N5247B 2-Port and 4-Port PNA-X Microwave Network Analyzers - Service Guide N5247B Series - (900 Hz /900 Hz/10 MHz - 67 GHz) This is the Service Guide for the N5247B Series Microwave Network Analyzers. SERVICE GUIDE...
  • Page 2 DOCUMENT OR ANY INFORMATION reproduce, release, perform, CONTAINED HEREIN. SHOULD display, or disclose commercial KEYSIGHT AND THE USER HAVE A SEPARATE WRITTEN AGREEMENT computer software or WITH WARRANTY TERMS commercial computer software COVERING THE MATERIAL IN THIS...

  • Page 5: Table Of Contents

    Keysight Support, Services, and Assistance ........
  • Page 6 IF Gain Adjustment ........... . . 3-58 Keysight N5247B Service Guide...
  • Page 7 4-Port N5290A System Block Diagram (401) ....... . 4-58 Keysight N5247B Service Guide...
  • Page 8 A23 Test Set Motherboard..........5-29 A70 4-Port and A75 2-Port Low Frequency Extension (LFE) Board....5-32 Keysight N5247B Service Guide...
  • Page 9 Rear-Panel Assembly, All Options ........6-189 Keysight N5247B Service Guide...
  • Page 10 Removing and Replacing the A60–A63 70 GHz Doublers ......7-62 Removing and Replacing the A56 Port 1 Noise Bypass Switch (Option 029) ... 7-64 Keysight N5247B Service Guide...
  • Page 11 Accessing the Keysight License Manager ........
  • Page 12 Contents Keysight N5247B Service Guide...

  • Page 13: Safety And Regulatory Information

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Safety and Regulatory Information Information in This Chapter This chapter provides safety information that will help protect you and your network analyzer. It also contains information that is required by various government regulatory agencies.

  • Page 14: Safety Symbols

    Warning denotes a hazard. It calls attention to a procedure which, if not correctly performed or adhered to, could result in injury or loss of life. Do not proceed beyond a warning note until the indicated conditions are fully understood and met. Keysight N5247B Service Guide...

  • Page 15: General Safety Considerations

    Any interruption of the protective conductor, inside or outside of the instrument, will make the instrument dangerous. Intentional interruption is prohibited. Use Keysight supplied power cord or one with same or better electrical rating. Always use the three-prong AC power cord supplied with this product.
  • Page 16 The measuring terminals on this instrument are designed to be used with external signals described in Measurement Category I, but NOT with external signals described in Categories II, III, and IV. The input of this instrument cannot be connected to the mains. Keysight N5247B Service Guide...

  • Page 17: Servicing

    There are no replaceable fuses in the mains input or within the power supply assembly. Keysight personnel: after calibration is completed, attach four “calibration void if seal broken” stickers to the PNA as shown in Figure 1-1.
  • Page 18 Safety and Regulatory Information General Safety Considerations Figure 1-1 Location of Calibration Stickers on PNA Keysight N5247B Service Guide...

  • Page 19: Electrostatic Discharge Protection

    3. Connect the other end of the cable to the test port and remove the short from the cable. Figure 1-2 shows a typical ESD protection setup using a grounded mat and wrist strap. Refer to “ESD Supplies” on page 6-205 for part numbers. Keysight N5247B Service Guide...
  • Page 20 Safety and Regulatory Information Electrostatic Discharge Protection Figure 1-2 ESD Protection Setup Keysight N5247B Service Guide...

  • Page 21: Regulatory Information

    This symbol indicate the presence of a Laser device. This symbol indicates the surface can be hot. This symbol indicated the product is sensitive to electrostatic discharge. Keysight N5247B Service Guide...
  • Page 22 The UK conformity mark is a UK government owned mark. Products showing this mark comply with all applicable UK regulations. The Keysight email address is required by EU directives applicable to our product. The CSA mark is a registered trademark of the CSA International.
  • Page 23 National legislation. Please refer to www.keysight.com/go/takeback to understand your trade-in options with Keysight, in addition to product takeback instructions. China Restricted Substance Product Label. The EPUP (environmental protection use period) number in the center indicates the time period during which no hazardous or toxic substances or elements are expected to leak or deteriorate during normal use and generally reflects the expected useful life of the product.

  • Page 24: Lithium Battery Disposal

    If the battery on the A21 CPU board assembly needs to be disposed of, dispose of it in accordance with your country’s requirements. If required, you may return the battery to Keysight Technologies for disposal. Refer to “Contacting Keysight” on page 2-7 for assistance.

  • Page 25: General Product Information

    Keysight Support, Services, and The Internet address (URL) for on-line assistance. page 2-7 Assistance Service and support options available. Calibration options available. Important information about shipping your analyzer to Keysight for service or repair.

  • Page 26: Maintenance

    Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to clean internally. Electrical Maintenance Refer to “Review the Principles of Connector Care” on page 3-5. Keysight N5247B Service Guide...

  • Page 27: Analyzer Options, Accessories, And Upgrades Available

    Analyzer Options, Accessories, and Upgrades Available Analyzer Options, Accessories, and Upgrades Available To see a list of the accessories and upgrades available for the network analyzers, including ordering information, refer to the Keysight PNA Family Microwave Network Analyzers Configuration Guide, available online at https://www.keysight.com/us/en/assets/7018-05185/configuration-guides/ 5992-1465.pdf...

  • Page 28: Required Service Test Equipment

    If an accurate measurement of the dynamic accuracy specification is not required, the E4418A or E4419A can be used. e. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected.
  • Page 29 Critical Specifications Recommended Alternate Equipment Model or Part Model Number Number Tools T-8 TORX driver 0.6 N-m (5 in-lb) setting T-10 TORX driver 0.5, 0.8, and 1.0 N-m (4, 7, and 9 in-lb) settings Keysight N5247B Service Guide...
  • Page 30 USB flash ROM drive None P,A,R a. Unless specified otherwise, equipment listed is required for all analyzer models. b. P = Performance tests, A = Adjustments, T = Troubleshooting, R = Repair, V = System verification Keysight N5247B Service Guide...

  • Page 31: Keysight Support, Services, And Assistance

    Service and Support Options The analyzer’s standard warranty period is one-year from the time of initial delivery. All repairs require the analyzer to be shipped to the nearest Keysight Technologies service center. Extended warranty periods can be purchased with the initial product purchase.

  • Page 32: Shipping Your Analyzer To Keysight For Service Or Repair

    General Product Information Keysight Support, Services, and Assistance If you do not have access to the Internet, please contact your Keysight field engineer. In any correspondence or telephone conversation, refer to the Keysight product by its model number and full serial number. With this information, the Keysight representative can determine whether your product is still within its warranty period.

  • Page 33: Tests And Adjustments

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Tests and Adjustments Information in This Chapter This chapter contains procedures to help you check, verify, and adjust your PNA. — The checks verify the operation of the assemblies in your analyzer.
  • Page 34 Performing the operator’s check. page 3-12 Checking your test cables. Perform these checks before performing system verification. System Verification What the system verification does. page 3-22 How to perform the verification test. How to interpret the results. Keysight N5247B Service Guide...
  • Page 35 Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) a. These performance tests are included in the analyzer’s firmware for Options S93898A. b. These adjustments are included in the analyzer’s firmware on all models and options. Keysight N5247B Service Guide...

  • Page 36: Before You Begin

    To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5247B Service Guide...

  • Page 37: Allow The Analyzer To Warm Up

    Prior to making connections to your analyzer, carefully review the information about inspecting, cleaning, and gaging connectors. Refer to the calibration kit documentation for detailed connector care information. For course numbers about additional connector care instruction, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-7. Table 3-1...
  • Page 38 Cleaning connectors with alcohol shall only be done with the instrument’s power cord removed, and in a well-ventilated area. Allow all residual alcohol moisture to evaporate, and the fumes to dissipate prior to energizing the instrument. Keysight N5247B Service Guide...

  • Page 39: About System Verification And Performance Tests

    — Complete all of the performance tests using a certified calibration kit that will be used for future measurements. This alternative verifies both the system specifications and the instrument specifications for the analyzer. Keysight N5247B Service Guide...

  • Page 40: Instrument Specifications

    An illustrated outline of the performance verification procedure: — for ANSI/NCSL Z540.3-2006 and ISO/IEC 17025 verification, is shown in Figure 3-1 on page 3-10. — for non-standards verification, is shown in Figure 3-2 on page 3-11. Keysight N5247B Service Guide...

  • Page 41: Certificate Of Calibration

    If you have a measurement application that does not use all of the measurement capabilities of the analyzer, you may ask your local Keysight Technologies service office to verify only a subset of the specifications. However, this “limited calibration” creates the possibility of making inaccurate measurements if you then use the analyzer in an application requiring additional capabilities.

  • Page 42: Ansi/Ncsl Z540.3-2006 And Iso/Iec 17025 Verification

    After the failure has been corrected, repeat the entire set of performance tests and generate a new set of data. Figure 3-1 ANSI/NCSL Z540.3–2006 and ISO/IEC 17025 Verification Flowchart 1. Stop only in case of a catastrophic failure or cable connector damage 3-10 Keysight N5247B Service Guide...

  • Page 43: Non-Standards Compliant Verification

    Troubleshoot and repair the first problem encountered without continuing to other tests. After you troubleshoot, repair, and adjust, repeat the last failed portion and generate a new set of data. Figure 3-2 Non–Standards Compliant Verification Flowchart Keysight N5247B Service Guide 3-11...

  • Page 44: Preliminary Checks

    Shorts/Opens are attached to ALL ports, to run through the test without stopping. Shorts and opens can be mixed on the test ports. 3. Click Begin. 3-12 Keysight N5247B Service Guide...
  • Page 45 Figure 3-3). The PNA Operator’s Check dialog box will look different for different PNA model numbers and installed options. Some of the tests are performed only if the appropriate options are installed in the PNA. Keysight N5247B Service Guide 3-13...
  • Page 46 Tests and Adjustments Preliminary Checks Figure 3-3 Operator’s Check Dialog Boxes 3-14 Keysight N5247B Service Guide...

  • Page 47: The Test Port Cable Checks

    7. The marker annotation on the screen indicates the worst case return loss. Refer to the cable manual to see if it meets the return loss specification. For an example of a typical return loss measurement, see Figure 3-4. Keysight N5247B Service Guide 3-15...
  • Page 48 CalSet_1.cst. 6. Connect the test port cable to the PNA Port 1 and perform a 1-port calibration again at the end of the cable. After calibration, save the cal set data as CalSet_2.cst. 3-16 Keysight N5247B Service Guide...
  • Page 49 Help section “Save and Recall a File” if necessary. 10.Refer to the cable manual to see if it meets the insertion loss specification. For an example of a typical insertion loss measurement, see Figure 3-6. Keysight N5247B Service Guide 3-17...
  • Page 50 Average on/OFF softkey to toggle it ON. The Averaging Factor box will appear directly above the display. In the Averaging Factor box, type 50 or click the arrows to select 50, and then press ENTRY Enter 3-18 Keysight N5247B Service Guide...
  • Page 51 Therefore, the measured deflection value must be divided in half to reach the correct value. Figure 3-7 Typical Cable Magnitude and Phase Stability Response Keysight N5247B Service Guide 3-19...
  • Page 52 7. Disconnect and then reconnect the cable to the test port. Tighten the connection to the specified torque for the connector type. 8. Press RESPONSE , then Averaging Restart 9. Look at the trace for spikes or modes. 3-20 Keysight N5247B Service Guide...
  • Page 53 Typical Cable Connector Repeatability Response If the Cable Connector Repeatability Check Fails 1. Clean the cable and devices, and torque to specification. Repeat the check. 2. If the check still fails, the cable should be repaired or replaced. Keysight N5247B Service Guide 3-21...

  • Page 54: System Verification

    Measurement Uncertainty Measurement uncertainty is defined as the sum of: — the residual systematic (repeatable) errors, and — the random (non-repeatable) errors in the measurement system after calibration. The systematic errors are: 3-22 Keysight N5247B Service Guide...

  • Page 55: Measurement Traceability

    This is accomplished by measuring the devices in a Keysight verification kit. The measurement of the devices in the verification kit has a traceable path...

  • Page 56: Performing System Verification

    If you select to perform a calibration, you are guided through the calibration procedure. This part of the process can be eliminated if you 3-24 Keysight N5247B Service Guide...
  • Page 57 Refer to the plots in the cable tests (earlier in this chapter) that show the performance of good cables. It is highly recommended that the test port cables be regularly tested. Keysight N5247B Service Guide 3-25...
  • Page 58 Tests and Adjustments System Verification If the system verification is performed with a non-Keysight cable, ensure that the cable meets or exceeds the specifications for the test cable specified in the previous table, “Equipment Used in the System Verification Procedure.”...
  • Page 59 3-13 on page 3-31. — File Tabular Data: Writes the tabular data to a text file in the Windows XP directory C:\Program Files\Keysight\Network Analyzer\Documents or the Windows 7 directory C:\Users\Public\Public Documents\Network Analyzer\Documents\SysVer. — File Graphs: Saves a screen image in PNG format in the Windows XP...
  • Page 60 Data selected in the Printer Output area of the System Verification dialog box. At the top of the printed output is the name of the device, the serial number of the device, and the date tested. 3-28 Keysight N5247B Service Guide...
  • Page 61 Tests and Adjustments System Verification Each S-parameter measurement result is printed with frequency tested, lower and upper limit lines, the measured data, and the result of the test. Figure 3-12 Example of Printed Tabular Verification Results Keysight N5247B Service Guide 3-29...
  • Page 62 — Data measured at the factory from the verification kit. Labeled as B in Figure 3-13. — Upper and lower limit points as defined by the total system uncertainty system. Labeled as C in Figure 3-13. 3-30 Keysight N5247B Service Guide...
  • Page 63 Tests and Adjustments System Verification Figure 3-13 Example of Printed Graphical Verification Results Keysight N5247B Service Guide 3-31...

  • Page 64: Performance Tests

    Function of the Test: To confirm the accuracy of the source output power of your network analyzer over its full frequency range. Specification Tested: Test Port Output–Power Level Accuracy Equipment Used: — Power meter — Power sensors 3-32 Keysight N5247B Service Guide...

  • Page 65: Source Maximum Power Output Test

    2. The analyzer is set up for a CW reflection measurement on the test port to be measured. 3. A power sensor is connected to the test port, using any necessary adapters. 4. The analyzer frequency is set to the desired value. Keysight N5247B Service Guide 3-33...

  • Page 66: Source Power Linearity Test

    4. The receiver measurement is normalized at this Preset power level. 5. The source setting is then stepped from the minimum to the maximum ALC power setting range in 1 dB steps, and the receiver power is measured at each setting. 3-34 Keysight N5247B Service Guide...

  • Page 67: Frequency Accuracy Test

    The difference must be less than the source frequency divided by 16 for a 1 part per million (ppm) specification. 5. This test is repeated at several frequencies across the range of the source synthesizer board. If the Analyzer Fails this Test: Keysight N5247B Service Guide 3-35...

  • Page 68: Trace Noise Test

    Most failures are due to this board. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-20. — If the analyzer still fails this test, replace the mixer module for the failing receiver, and then repeat this test. 3-36 Keysight N5247B Service Guide...

  • Page 69: Receiver Compression Test

    8. The first test set output attenuator is set to 20 dB. 9. The magnitude and phase measurements using the receiver under test are read: (Pb). 10.The second test set output attenuator is set to 20 dB. Keysight N5247B Service Guide 3-37...

  • Page 70: Noise Floor Test

    5. For hundreds of frequencies across the analyzer’s full range, a source power calibration is performed to ensure a flat power response at the end of the cable at the Preset power level. 3-38 Keysight N5247B Service Guide...

  • Page 71: Calibration Coefficients Test

    2. A calibration is performed between the end of the test cable and Port 2. The Port 2 directivity and source match and the S21 load match are retrieved from the analyzer. 3. The test cable is moved to Port 2. Keysight N5247B Service Guide 3-39...

  • Page 72: Dynamic Accuracy Test - Version 1

    10 dB step attenuator, A1, to a power splitter. One side of the power splitter is connected to the power sensor port. The signal from the other side of the splitter is routed through a 110 dB step attenuator, A2, to the receiver port. 3-40 Keysight N5247B Service Guide...

  • Page 73: Dynamic Accuracy Test - Version 2

    Option 205/220/420/425)” on page 3-43. Function of the Test: To measure the relative power linearity of the analyzer’s receivers. Specification Tested: Test Port Input–Dynamic Accuracy Equipment Used: — U3020AD01 dynamic accuracy test set — Signal generator Keysight N5247B Service Guide 3-41...
  • Page 74 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-43. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-20. 3-42 Keysight N5247B Service Guide...

  • Page 75: Dynamic Accuracy At Low Frequency (Available With Lfe Option 205/220/420/425)

    Setups for some option configurations may not appear in the Help. — For the two cables between the power splitter and attenuators, choose short but flexible cables. 1. Your model PNA may not have available all of the LFE Options listed. Keysight N5247B Service Guide 3-43...
  • Page 76 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-43. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-20. 3-44 Keysight N5247B Service Guide...

  • Page 77: Dc Continuity Test The Lfe Board And Test Ports (Available With Lfe Option 205/220/420/425)

    800 kHz noise IF bandwidth using hundreds of points across the full frequency range of the noise receiver. 4. The ENR data file for the noise source is read into the analyzer. 1. Your model PNA may not have available all of the LFE Options listed. Keysight N5247B Service Guide 3-45...

  • Page 78: Noise State Calibration Coefficients

    2. The analyzer is set to make a noise power density measurement with the noise gain set to 0 dB and the noise bandwidth set to 4 MHz. The analyzer is set up for a 201 point CW transmission measurement using the noise receiver. 3-46 Keysight N5247B Service Guide...

  • Page 79: Noise Receiver Linearity Test

    1. The signal generator is connected to the dynamic accuracy test set’s source port and the dynamic accuracy test set’s receiver port is connected to the PNA-X Port 2. A power sensor is connected to the dynamic accuracy test set’s power meter port. Keysight N5247B Service Guide 3-47...

  • Page 80: Noise Receiver Compression Test

    Noise Receiver Compression Test Function of the Test: To measure the PNA-X noise receiver compression at the receiver’s specified maximum input power level. Specification Tested: Test Port Input: Option 029 – Noise Receiver Input Range 3-48 Keysight N5247B Service Guide...
  • Page 81 B receiver. 11.The source power calibration for the appropriate gain stage is applied and a sweep is made. 12.The source attenuator is set for an additional 10 dB and another sweep is made. Keysight N5247B Service Guide 3-49...
  • Page 82 — Check for proper torquing of all semi-rigid cables in the receiver chain, and then repeat this test. — If the analyzer still fails this test, replace the A7 Noise Receiver board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-20. 3-50 Keysight N5247B Service Guide...
  • Page 83 — If the test procedure applies to multiple ports, illustrations will show the setup on only one test port. Setups for some option configurations may not appear in the Help. — For the two cables between the power splitter and attenuators, choose short but flexible cables. Keysight N5247B Service Guide 3-51...
  • Page 84 “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-43. — If the analyzer still fails this test, replace the A12 SPAM board and repeat this test. Refer to “Removing and Replacing the A4–A17 Boards” on page 7-20. 3-52 Keysight N5247B Service Guide...

  • Page 85: Dc Continuity Test The Lfe Board And Test Ports (Available With Low Frequency Extension (Lfe) Installed Option 205/425)

    Cables, All Options, Serial Number Prefixes <6021” on page 6-18 and the blue RF flexible cables installed in Chapter 6 in the “Bottom Assemblies” section—for your LFE option—are connected correctly and not open or shorted. Keysight N5247B Service Guide 3-53...

  • Page 86: Adjustments

    “Calibration Procedure” below. Step 1. Verify your instrument is powered up. Step 2. Press Instrument > Display > Display Setup > Calibrate Touchscreen... Step 3. In the Table PC Setting window that opens, press Calibrate... 3-54 Keysight N5247B Service Guide...

  • Page 87: 10 Mhz Frequency Reference Adjustment

    Any that will measure a signal at 10 MHz. Procedure This adjustment typically adjusts to within ±0.01 ppm. 1. Connect the equipment as shown in Figure 3-16. Connect a GPIB cable between the network analyzer and the frequency counter. Keysight N5247B Service Guide 3-55...

  • Page 88: Synthesizer Bandwidth Adjustment

    The source calibration is used to adjust your network analyzer for a flat source power across its full frequency range. There are differences between each test port; therefore, an adjustment is required for each port. 3-56 Keysight N5247B Service Guide...
  • Page 89 None Adapter, Type-N (f) to 2.4 mm (f) a. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected. b. The 1.85 mm connector has the same ruggedness and is compatible with the 2.4 mm connectors.

  • Page 90: If Gain Adjustment

    Therefore, they should be backed up (saved on a floppy disk) so that they can be restored. If using multiple disk drives (e.g. classified and general usage), then these files must be replaced on each individual disk drive. These files can be recreated by performing another receiver calibration adjustment. 3-58 Keysight N5247B Service Guide...
  • Page 91 N4697E N4697-60200 a. This sensor and adapter must be calibrated together by the Keysight factory. The data supplied is only valid as long as the sensor and adapter remain connected. b. The 1.85 mm connector has the same ruggedness and is compatible with the 2.4 mm connectors.

  • Page 92: Ee Default Adjustment

    4. Follow the instructions and prompts as they are displayed. Figure 3-19 Equipment Setup 2 for the Receiver Adjustment Figure 3-20 Equipment Setup 3 for the Receiver Adjustment EE Default Adjustment This sets the EEPROM data to their default values. 3-60 Keysight N5247B Service Guide...

  • Page 93: If Response Adjustment (Available Only With Option S93093/4A/B And Or S93900/1/2/4/5/7A/B Installed)

    System , then , then , then click LFE Receiver Adjustment. 2. Follow the instructions and prompts as they are displayed. 1. Your model PNA may not have available all of the LFE Options listed. Keysight N5247B Service Guide 3-61...

  • Page 94: Noise Figure Adjustment (Available With Option 029 With S93029A/B Installed)

    50 GHz. Procedure Service Adjustment Routines 1. Press UTILITY System , then , then , then click Noise Adjustment. 2. On the PNA Noise Adjustment dialog box (see Figure 3-21): 3-62 Keysight N5247B Service Guide...
  • Page 95 Skip Zero and Cal before first use. Figure 3-21 PNA Noise Adjustment Dialog Box 3. Click Begin. 4. As shown in Figure 3-22, connect an RF cable between the network analyzer test ports 1 and 2. Keysight N5247B Service Guide 3-63...
  • Page 96 6. When prompted, disconnect the sensor from the cable, and insert the ECal module between port 2 and the free end of the cable. Connect the ECal module directly to port 2 without using any adapters if possible. See Figure 3-24. 3-64 Keysight N5247B Service Guide...
  • Page 97 Tests and Adjustments Adjustments Figure 3-24 Equipment Setup 3 for the Receiver Adjustment The entire procedure takes about 30 to 45 minutes. Keysight N5247B Service Guide 3-65...
  • Page 98 Tests and Adjustments Adjustments 3-66 Keysight N5247B Service Guide...

  • Page 99: Troubleshooting

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Troubleshooting Information in This Chapter The information in this chapter helps you: — Identify the portion of the analyzer at fault. — Locate the specific troubleshooting procedure to identify the assembly or peripheral at fault.

  • Page 100: Chapter Four At-A-Glance

    Problems with the measurement portion of the analyzer. page 4-29 Troubleshooting — Checking the A, B, R1, and R2 signals. — Checking the source group. — Checking the signal separation group. — Checking the receiver group. Keysight N5247B Service Guide...

  • Page 101: Conventions Used For Hardkeys, Softkeys, And Menu Items

    This represents a “tab”, whose label is determined by the instrument firmware. This represents a “softkey”, a key whose label is determined by the instrument firmware. Softkey Menu Item This represents an item in a drop-down or pop-up menu. Keysight N5247B Service Guide...

  • Page 102: Operating The Analyzer With Covers Removed

    Step 2. Replace the faulty assembly and determine what adjustments are necessary. Refer to Chapter 7, “Repair and Replacement Procedures.” Step 3. Perform the necessary adjustments. Refer to Chapter 3, “Tests and Adjustments.” Step 4. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Keysight N5247B Service Guide...

  • Page 103: Getting Started With Troubleshooting

    Check the Basics A problem can often be solved by repeating the procedure you were following when the problem occurred. Before calling Keysight Technologies or returning the instrument for service, please perform the following checks: 1. Is there power at the mains receptacle? If not, correct this situation and proceed.
  • Page 104 Troubleshooting Getting Started with Troubleshooting Figure 4-1 Troubleshooting Organization Flowchart Go to “Power Up Troubleshooting” Go to “Front Panel Troubleshooting” Go to “Rear Panel Troubleshooting” Go to “Measurement System Troubleshooting” Keysight N5247B Service Guide...

  • Page 105: Power Up Troubleshooting

    “Troubleshooting LCD Display Problems” on page 4-13. — If the instrument appears to abort the network analyzer measurement interface process, contact Keysight. Refer to “Contacting Keysight” on page 2-7. Keysight N5247B Service Guide...

  • Page 106: Power Supply Check

    ACOM as ground reference for analog supplies and the point marked DCOM as ground reference for digital supplies. Refer to Figure 4-2 for the power supply measurement points on the A19 midplane board. Refer to Table 4-1 on page 4-10 for the correct voltages. Keysight N5247B Service Guide...
  • Page 107 A20 power supply provides voltage. To isolate the cause, continue to the assembly removal process as described in the section titled “If Any Supply Voltage Is Missing” on page 4-10. Keysight N5247B Service Guide...
  • Page 108 Motherboard” on page 7-34). 2. Unplug the A23 test set motherboard to A24 IF multiplexer board ribbon cable from the A24 IF multiplexer board (refer to “Removing and Replacing the A24 IF Multiplexer Board” on page 7-36). 4-10 Keysight N5247B Service Guide...
  • Page 109 You should be able to determine if the shorted condition has changed. Isolate the remaining three assemblies: Keysight N5247B Service Guide 4-11...
  • Page 110 A18 system motherboard. THIS MUST BE DONE QUICKLY AS THE ANALYZER WILL RAPIDLY OVERHEAT WITHOUT THE COOLING EFFECT OF THE FANS. DO NOT PLUG IN THE POWER CORD UNTIL READY TO PERFORM MEASUREMENTS. 4-12 Keysight N5247B Service Guide...

  • Page 111: Troubleshooting Lcd Display Problems

    There are no front panel adjustments for intensity and contrast of the LCD. 1. If the display is dim, the A3 display assembly is defective. Refer to “Removing and Replacing the A1–A3 and Other Front Panel Subassemblies” on page 7-12. Keysight N5247B Service Guide 4-13...
  • Page 112 4. If the front panel interface ribbon cable is properly connected, suspect that one or more of the following is defective: — inverter board (mounted on the display assembly) — A1 front panel interface board — A3 display assembly 4-14 Keysight N5247B Service Guide...

  • Page 113: Front Panel Troubleshooting

    Service Diagnostics Press UTILITY , then , then , then System Front Panel Test A Front Panel Key Test Utility dialog box will be displayed, as shown in Figure 4-4. Keysight N5247B Service Guide 4-15...
  • Page 114 7-13. To replace the A1 front panel interface board, refer to “Removing the A1 Front Panel Interface Board and Keypad Assembly” on page 7-12. — To close the Key Label window and return to the instrument display, press Preset three times. 4-16 Keysight N5247B Service Guide...
  • Page 115 Scale Save/Recall ← Math → Macro Avg BW Undo ↓ System Help Marker Search Preset a. There are no Entry or Navigation labels on the display. Entry and Navigation titles are for functional reference only. Keysight N5247B Service Guide 4-17...

  • Page 116: A3 Display Test

    If the display is dark, refer to “Removing the A3 Display Assembly and the Touchscreen” on page 7-14 and to “Removing the Touchscreen Controller Board” on page 7-13. 4-18 Keysight N5247B Service Guide...

  • Page 117: Checking The A2 Usb Board

    USB device. 3. If the device performs correctly, the USB board is functioning properly. Else, skip to step 5. 4. Repeat steps thru for all front and rear USB ports. Keysight N5247B Service Guide 4-19...

  • Page 118: A1 Front Panel Interface Board

    A1 Front Panel Interface Board and Keypad Assembly” on page 7-12 and to “Removing the Speaker Assembly” on page 7-14. Checking the Operation of the Key Pad Commands To verify the key pad functionality, refer to “Front Panel Keypad and RPG Test” on page 4-15. 4-20 Keysight N5247B Service Guide...
  • Page 119 Troubleshooting Front Panel Troubleshooting Checking the Display To verify the display functionality, refer to “A3 Display Test” on page 4-18. Keysight N5247B Service Guide 4-21...

  • Page 120: Rear Panel Troubleshooting

    Configure , then SICL/GPIB... System SICL/GPIB/SCPI dialog box is displayed. 3. In the GPIB block, click System Controller to establish the analyzer as a controller. Wait for the analyzer to configure, and then click OK. 4-22 Keysight N5247B Service Guide...

  • Page 121: Lan Troubleshooting

    Problems with the Local Area Network (LAN) can be difficult to solve. Software and protocol problems can make it difficult to determine whether the analyzer's hardware is working properly, or if there is a problem with the LAN or cabling. Keysight N5247B Service Guide 4-23...
  • Page 122 Windows Taskbar menu at the bottom of the display. b. On the Windows Taskbar menu, click Start, point to Programs, Accessories, and then click Command Prompt. c. The command prompt window is displayed. 4-24 Keysight N5247B Service Guide...
  • Page 123 Other software may behave somewhat differently, but basically the same. 1. The letters x represent the IP address of the other device on the network. 2. The letters x represent the IP address of the analyzer. Keysight N5247B Service Guide 4-25...
  • Page 124 A crossover cable can be made from a standard LAN cable by connecting pin 1 from each connector to pin 3 of the other connector, and pin 2 from each connector to pin 6 of the other connector. 4-26 Keysight N5247B Service Guide...
  • Page 125 2 on the other end of the cable. 3. Insulate all exposed wires so that they cannot short together. 4. Label this as a crossover cable so that it cannot be confused with a standard cable. Keysight N5247B Service Guide 4-27...
  • Page 126 Troubleshooting Rear Panel Troubleshooting Figure 4-6 Construction of a Crossover Cable 4-28 Keysight N5247B Service Guide...

  • Page 127: Measurement System Troubleshooting

    , then Help . Verify that the information displayed in this screen is correct for About NA... your analyzer. If any of the information is incorrect, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-7. Keysight N5247B Service Guide...
  • Page 128 , then , then View EEPROM Headers . Refer to Figure 4-7. If the information is incorrect for any of the PC boards, contact Keysight Technologies. Refer to “Contacting Keysight” on page 2-7. Figure 4-7 EEPROM Header Info Dialog Window...

  • Page 129: Verifying The A, B, C, D, And R Traces (Standard S-Parameter Mode)

    — For 4-port analyzer models, traces A, B, C, D, and R1, R2, R3, and R4 are displayed in eight separate data windows as shown in Figure 4-9. Identifying discrepancies of the traces in these windows can help you to isolate the faulty assembly. Keysight N5247B Service Guide 4-31...

  • Page 130: Where To Begin Troubleshooting

    — Go to Chapter 3, “Tests and Adjustments.” and perform all the tests in that section. — If a problem still exists, contact Keysight. Refer to “Contacting Keysight” on page 2-7. — If any of the traces are not present, are noisy or distorted, or are at an incorrect level, then there is a problem with the analyzer’s measurement...
  • Page 131 A26 splitter. Some PNAs have installed a new HMA26.5 (N5240-60101) with an integrated splitter. To identify which HMA26.5 is installed in your PNA, refer to “Verify the Model/Version of HMA26.5 Installed” on page 4-41. Keysight N5247B Service Guide 4-33...
  • Page 132 Properties in the resulting pop-up menu. Click the Hardware tab, click Device Manager, and then expand Keysight PNA DSP Device in the resulting list. The following entry should be listed: Keysight Technologies DSP Driver #2 and should be enabled.

  • Page 133: Checking The Source Group

    Broadband failures are indicated by all receiver traces being in the noise floor. RF Signal Troubleshooting Check the output power of the A, B, C, and D signals: Equipment Used for This Check Keysight N5247B Service Guide 4-35...
  • Page 134 — If the power level is low or high on only one of the test ports, the problem is either source group or in the signal separation group. Continue with “Checking the A14 50 MHz Reference Outputs” to check the source group. 4-36 Keysight N5247B Service Guide...
  • Page 135 1. A14 frequency reference board only applies to instruments with serial number pre- fixes <6021. 2. The A15 direct digital synthesizer assembly only applies to PNAs with serial number that has been prefixes ≥6021 or upgraded with a version 7 synthesizer assembly. Keysight N5247B Service Guide 4-37...
  • Page 136 Repeat steps 1 through.3. e. If the instrument still has a similar “Slug” failure then the DDS is faulty and needs to be replaced. 5. If the A15 DDS assembly is faulty, contact Keysight Technologies for help. Refer to “Contacting Keysight” on page 2-7.
  • Page 137 W51 at the A15 LO synthesizer board. 2. Disconnect W51 from J1207. 3. Connect the spectrum analyzer to J1207. 1. A15 13.5 GHz LO Synthesizer board only applies to instruments with serial number prefixes <6021. Keysight N5247B Service Guide 4-39...
  • Page 138 5. If the observed problem was frequency banded rather than broadband related, set the analyzer frequency to the center of the problem band. The spectrum analyzer should measure a signal above the network analyzer 4-40 Keysight N5247B Service Guide...
  • Page 139 The new N5240-60101 HMA26.5 has the splitter integrated into the assembly and uses an N5222-20126 cable. Refer to Figure 4-12 on page 4-42. See also Chapter 6, “Replaceable Parts.” and the “Bottom Assemblies and Cables” section for your configuration and serial number prefix. Keysight N5247B Service Guide 4-41...
  • Page 140 Troubleshooting Measurement System Troubleshooting Figure 4-12 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) 4-42 Keysight N5247B Service Guide...
  • Page 141 2-port models with Option 224.) 2. Disconnect W1 or W2 from J1207. 3. Connect the spectrum analyzer to J1207. 1. A4 and A17 synthesizer boards only applies to PNAs with serial number prefixes <6021. Keysight N5247B Service Guide 4-43...
  • Page 142 Refer to “Removing and Replacing the A4–A17 Boards” on page 7-20. 7. If the signal is present, reconnect all cables, and then continue with “Checking the A7, A8, A12, and A13 40 GHz Doubler Outputs”. 4-44 Keysight N5247B Service Guide...
  • Page 143 A61 and A62 are available only in 4-port models and 2-port models with Option 224.) — W27 on the A60 doubler board, — W28 on the A61 doubler board — W29 on the A62 doubler board Keysight N5247B Service Guide 4-45...
  • Page 144 “Removing and Replacing the A60–A63 70 GHz Doublers” on page 7-62. 7. If the signal is present, reconnect all cables, and then continue with “Checking the Signal through the Signal Separation Path” on page 4-49. 4-46 Keysight N5247B Service Guide...

  • Page 145: Checking The Signal Separation Group

    Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1. Turn off the analyzer power. 2. Unplug the power to the analyzer and disconnect all front and rear panel connections except installed jumpers. Keysight N5247B Service Guide 4-47...
  • Page 146 , then Utilities Receiver Display , then 3. Set the sweep speed for a 10 second sweep: Press STIMULUS Sweep Sweep Time then . Set the time to 10.000 seconds in the Sweep Time box. 4-48 Keysight N5247B Service Guide...
  • Page 147 224.) — A29, A30, A31, or A32 reference coupler — A38, A39, A40, or A41 source step attenuator — A42, A43, A44, or A45 bias tee — A33, A34, A35, and A36 test port coupler Keysight N5247B Service Guide 4-49...
  • Page 148 5. If the 800 MHz signal is not present and the analyzer does not have mechanical switches, replace the reference coupler. Refer to “Removing and Replacing the A29 –A32 Reference Couplers and Reference Coupler Mounting Brackets” on page 7-45. 4-50 Keysight N5247B Service Guide...
  • Page 149 — Port 1; W106 of A50 — Port 2; W120 of A53 — Port 3; W112 of A51 — Port 4; W116 of A52 2. Using a 5/16-inch torque wrench, disconnect the semirigid cable at the bypass switch. Keysight N5247B Service Guide 4-51...

  • Page 150: Checking The Receiver Group

    Use an antistatic work surface and wrist strap to reduce the chance of electrostatic discharge for all of the procedures in this chapter. 1. Turn off the analyzer power. 2. Unplug the power to the analyzer and disconnect all front and rear panel connections except installed jumpers. 4-52 Keysight N5247B Service Guide...
  • Page 151 4. Refer to the NOTE notice on page 4-29. The measured signal on the spectrum analyzer should be at 7.61 MHz (analyzers with DSP version 4.0), or 7.44 MHz (analyzers with DSP version 5.0), and 1 GHz. Keysight N5247B Service Guide 4-53...
  • Page 152 A46–A49 Receiver Attenuators” on page 7-52. 5. If the 800 MHz signal is present, replace the associated mixer brick, A27 or A28. Refer to “Removing and Replacing the A27 and A28 Mixer Bricks” on page 7-43. 4-54 Keysight N5247B Service Guide...
  • Page 153 “Removing and Replacing the A4–A17 Boards” on page 7-20. 6. If the measured signal is not present, replace the A24 IF multiplexer board. Refer to “Removing and Replacing the A24 IF Multiplexer Board” on page 7-36. Keysight N5247B Service Guide 4-55...

  • Page 154: Instrument Simplified Block Diagrams - Lfe

    2-Port N5290A System Block Diagram (201 and 205) Figure 4-14 System Block Diagram Legend Figure 4-15 2-Port N5290A System Simplified Block Diagram (201 and 205) 1. Your model PNA may not have available all of the LFE Options listed. 4-56 Keysight N5247B Service Guide...

  • Page 155: 2-Port N5290A System Block Diagram (202 And 205)

    Troubleshooting Instrument Simplified Block Diagrams – LFE 2-Port N5290A System Block Diagram (202 and 205) Figure 4-16 2-Port N5290A System Simplified Block Diagram (202 and 205) Keysight N5247B Service Guide 4-57...

  • Page 156: 4-Port N5290A System Block Diagram (401)

    Troubleshooting Instrument Simplified Block Diagrams – LFE 4-Port N5290A System Block Diagram (401) Figure 4-17 4-Port N5290A System Simplified Block Diagram (401) 4-58 Keysight N5247B Service Guide...
  • Page 157 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-18 4-Port N5290A System Simplified Block Diagram (402) Keysight N5247B Service Guide 4-59...
  • Page 158 Troubleshooting Instrument Simplified Block Diagrams – LFE Figure 4-19 4-Port N5290A System Simplified Block Diagram (403) 4-60 Keysight N5247B Service Guide...
  • Page 159 Troubleshooting This page left intentionally blank. Keysight N5247B Service Guide 4-61...

  • Page 160: Instrument Block Diagrams - 2-Port (Sheet 1), Non-Lfe And Non-Dds

    Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 2-Port (Sheet 1), Non-LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5247B – 2-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) 4-62 Keysight N5247B Service Guide...
  • Page 161 REAR PANEL N5247B 2-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS INTERCONNECTS Including Options 201-Standard, 219-Attenuators and Bias Tees A24 IF MULTIPLEXER A27 MIXER BRICK (1) 224-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...

  • Page 162: Instrument Block Diagrams - 2-Port (Sheet 2), Non-Lfe And Dds

    Instrument Block Diagrams – 2-Port (Sheet 2), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 2-Port (Sheet 2), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5247B – 2-Port, Non-LFE and DDS (Version 7 Synthesizer Assemblies) 4-64 Keysight N5247B Service Guide...
  • Page 163 REAR PANEL N5247B 2-Port Overall Block Diagram FRONT PANEL INTERCONNECTS FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 201-Standard, 219-Attenuators and Bias Tees A24 IF MULTIPLEXER A27 MIXER BRICK (1) 224-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...

  • Page 164: Instrument Block Diagrams - 4-Port (Sheet 3), Non-Lfe And Non-Dds (Version 6

    Instrument Block Diagrams – 4-Port (Sheet 3), Non-LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 4-Port (Sheet 3), Non-LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5247B – 4-Port, Non-LFE and Non-DDS (Version 6 Synthesizers) 4-66 Keysight N5247B Service Guide...
  • Page 165 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS INTERCONNECTS Including Options 401-Standard; 419-Attenuators and Bias Tees; A24 IF MULTIPLEXER A27 MIXER BRICK (1) 423-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...

  • Page 166: Microwave Pna-X, N5247B - 4-Port, Lfe And Non-Dds (Version 6 Synthesizers)

    Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) Instrument Block Diagrams – 4-Port (Sheet 4), LFE and Non-DDS (Version 6 Synthesizers) Microwave PNA-X, N5247B – 4-Port, LFE and Non-DDS (Version 6 Synthesizers) 4-68 Keysight N5247B Service Guide...
  • Page 167 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL FRONT PANEL INTERCONNECTS INTERCONNECTS INTERCONNECTS Including Options 425-LFE, Attenuators, Bias Tees, A24 IF MULTIPLEXER A27 MIXER BRICK (1) Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz A46 STEP IF = 7.438 MHz for CW Freq >...

  • Page 168: Instrument Block Diagrams - 4-Port (Sheet 5), Non-Lfe And Dds

    Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 4-Port (Sheet 5), Non-LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5247B – 4-Port, Non-LFE and DDS (Version 7 Synthesizer Assemblies) 4-70 Keysight N5247B Service Guide...
  • Page 169 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL INTERCONNECTS FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 401-Standard; 419-Attenuators and Bias Tees; A24 IF MULTIPLEXER A27 MIXER BRICK (1) 423-Attenuators, Bias Tees, Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz IF = 7.438 MHz for CW Freq >...

  • Page 170: Assemblies)

    Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) Microwave PNA-X, N5247B – 4-Port, LFE and DDS (Version 7 Synthesizer Assemblies) 4-72 Keysight N5247B Service Guide...
  • Page 171 REAR PANEL N5247B 4-Port Overall Block Diagram FRONT PANEL INTERCONNECTS FRONT PANEL INTERCONNECTS INTERCONNECTS Including Options 425-LFE, Attenuators, Bias Tees, A24 IF MULTIPLEXER A27 MIXER BRICK (1) Combiner and Source Bypass Switches IF = 0.826 MHz for CW Freq < 53 MHz A46 STEP IF = 7.438 MHz for CW Freq >...
  • Page 172 Troubleshooting Instrument Block Diagrams – 4-Port (Sheet 6), LFE and DDS (Version 7 Synthesizer Assemblies) 4-74 Keysight N5247B Service Guide...

  • Page 173: Theory Of Operation

    Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Theory of Operation Information in This Chapter This chapter provides a general description of the operating theory of the N524xA 2-port and 4-port PNA microwave network analyzers. — Theory of operation is explained to the assembly level only.
  • Page 174 5-59 Control Group Operation processing and digital control. Power Supply Group Operation Operation of the power supply assembly group. page 5-64 Noise Measurement Group Operation of the noise measurement group. page 5-65 Operation (Option 029) Keysight N5247B Service Guide...

  • Page 175: Network Analyzer System Operation

    SRC 2 OUT 1 and SRC 2 OUT 2. Figure 5-1 is a simplified block diagram of the 4-port network analyzer system Figure 5-2 is a simplified block diagram of the 2-port network analyzer system. Figure 5-1 4-Port System Simplified Block Diagram Keysight N5247B Service Guide...
  • Page 176 Theory of Operation Network Analyzer System Operation Figure 5-2 2-Port System Simplified Block Diagram Figure 5-3 System Block Diagram Legend – LFE Block Diagrams Keysight N5247B Service Guide...
  • Page 177 Theory of Operation Network Analyzer System Operation Figure 5-4 4-Port N5290A System Simplified Block Diagram (401) – with LFE Keysight N5247B Service Guide...

  • Page 178: Functional Groups Of The Network Analyzer

    The major functional groups are: — Synthesized Source Group — Signal Separation Group — Receiver Group — Digital Processor and Digital Control Group — Power Supply Group Keysight N5247B Service Guide...
  • Page 179 1. Version 6 synthesizers: For PNA-X frequency ranges and maximum output power levels, refer to the section “Test Port Output” in the online Keysight document, “N5247B– (900 Hz) 10 MHz to 67 GHz -with synthesizer revision 6 or earlier.” See the hyperlink above.
  • Page 180 — external connections for the DUT (configurable test set) — optional step attenuators in the source and receiver paths — optional mechanical switches — optional bias tees Refer to “Signal Separation Group Operation” on page 5-46. Keysight N5247B Service Guide...
  • Page 181 “Digital Processing and Digital Control Group Operation” on page 5-59. Power Supply Group The power supply functional group provides power for the other assemblies in the instrument. Refer to “Power Supply Group Operation” on page 5-64. Keysight N5247B Service Guide...

  • Page 182: Synthesized Source Group Operation

    6 or earlier.” See the hyperlink above. 2. Version 7 synthesizers: For PNA-X frequency ranges and maximum output power levels, refer to the section “Test Port Output” in the online Keysight document, “N5247B– (900 Hz) 10 MHz to 67 GHz Data Sheet and Technical Specifications.”...

  • Page 183: Basic Operation

    LO signal while the A4 and A17 boards produce independently phase locked test signals. This makes it possible for the LO signal to be tuned to a different 1. A26 splitter only applies to PNAs with serial number prefix <6021. Keysight N5247B Service Guide 5-11...
  • Page 184 5.0, the frequency value is 7.438 MHz. Since the A4, A15, and A17 13.5 GHz synthesizer boards each receive their 50 MHz input reference signal from the exact same source, frequency drift error is eliminated. 5-12 Keysight N5247B Service Guide...
  • Page 185 Theory of Operation Synthesized Source Group Operation Figure 5-6 Source Group, Version 6, Part 1 Keysight N5247B Service Guide 5-13...
  • Page 186 – For Version 7 synthesizers, the signals into the A12 and A13 50 GHz Doublers are generated on the A15 direct digital synthesizer (DDS) assembly. Not shown in figure above. See also, Figure 5-8 on page 5-20. 5-14 Keysight N5247B Service Guide...
  • Page 187 0.25761 to 0.25761 to 0.250 to 0.250 to 0.250 to 0.250 to 0.40361 0.40361 0.396 0.396 0.396 0.396 0.40361 to 0.40361 to 0.396 to 0.396 to 0.396 to 0.396 to 0.50761 0.50761 0.500 0.500 0.500 0.500 Keysight N5247B Service Guide 5-15...
  • Page 188 12.00761 to 12.00761 to 12.000 to 12.000 to 12.000 to 12.000 to 12.80761 12.80761 12.800 12.800 12.800 12.800 12.80761 to 12.80761 to 12.800 to 12.800 to 12.800 to 12.800 to 13.51761 13.51761 13.510 13.510 13.510 13.510 5-16 Keysight N5247B Service Guide...
  • Page 189 7.7013 to 15.4025 to 11.550 to 11.550 to 23.100 to 46.200 to 8.0013 16.0025 12.000 12.000 24.000 48.000 8.0013 to 16.0025 to 12.000 to 12.000 to 24.000 to 48.000 to 8.3346 16.6692 12.500 12.500 25.000 50.000 Keysight N5247B Service Guide 5-17...
  • Page 190 10.6679 to 21.3359 to 8.000 to 16.000 to 32.000 to 64.000 to 11.1679 22.3359 8.375 16.750 33.500 67.000 11.1679 to 22.3359 to 8.375 to 16.750 to 33.500 to 67.000 to 11.6679 23.3359 8.750 17.500 35.000 70.000 5-18 Keysight N5247B Service Guide...
  • Page 191 LO signal is a frequency value higher than the test signal. Since the A15 13.5 GHz DDS assembly receives 10 MHz input reference signal from the exact same source, frequency drift error is eliminated. 1. A26 splitter only applies to PNAs with serial number prefix <6021. Keysight N5247B Service Guide 5-19...
  • Page 192 Theory of Operation Synthesized Source Group Operation Figure 5-8 Source Group, Version 7, Part 1 (Example of Option 423 with Option 029 and with Option XSB) 5-20 Keysight N5247B Service Guide...
  • Page 193 0.250 to 0.396 0.250 to 0.396 0.403438 0.396 to 0.500 0.403438 to 0.396 to 0.500 0.396 to 0.500 0.396 to 0.500 0.507438 0.500 to 0.628 0.507438 to 0.500 to 0.628 0.500 to 0.628 0.500 to 0.628 0.635438 Keysight N5247B Service Guide 5-21...
  • Page 194 15.200 to 8.003719 16.000 16.000 16.000 7.600 to 9.520 8.003719 to 16.000 to 16.000 to 16.000 to 9.523719 19.040 19.040 19.040 9.520 to 9.523719 to 9.520 to 19.040 to 19.040 to 12.000 10.003719 10.000 20.000 20.000 5-22 Keysight N5247B Service Guide...
  • Page 195 13.510 8.334573 12.500 25.000 50.000 12.000 to 8.334573 to 12.500 to 25.000 to 50.000 to 13.510 8.334573 13.250 26.500 53.000 12.000 to 8.334573 to 13.250 to 26.500 to 53.000 to 13.510 9.007906 13.510 27.020 54.040 Keysight N5247B Service Guide 5-23...
  • Page 196 60.800 to 10.667906 16.000 32.000 64.000 7.600 to 9.520 10.667906 to 16.000 to 32.000 to 64.000 to 11.134573 16.700 33.400 66.800 7.600 to 9.520 11.134573 to 16.700 to 33.400 to 66.800 to 11.667906 17.500 35.000 70.000 5-24 Keysight N5247B Service Guide...

  • Page 197: A4, A15, And A17 13.5 Ghz Synthesizer Boards (S/N Prefixes <6021 Only)

    7.606 MHz IF signal for each of eight receivers (A–D and R1–R4). Refer to “A27 and A28 Mixer Bricks” on page 5-53 for a more complete description. Keysight N5247B Service Guide 5-25...
  • Page 198 A27 and A28 mixer bricks where they are mixed with the test signals to produce a 7.606 MHz IF signal for each of eight receivers (A–D and R1–R4). Refer to “A27 and A28 Mixer Bricks” on page 5-53 for a more complete description. 5-26 Keysight N5247B Service Guide...

  • Page 199: A5 And A10 26.5 Ghz Source Boards

    For bands 29–38, the input signals of all four doubler boards are doubled, amplified and filtered, then sent to the doubler board output P6, creating the full synthesized source output frequency range of 10 MHz to 40 GHz. Keysight N5247B Service Guide 5-27...

  • Page 200: A60, A61, A62, And A63 70 Ghz Doubler Boards

    VCO is then divided by ten to produce the 10 MHz EXT REF OUT rear panel signal and also a 10 MHz reference signal for the A16 signal processing 1. A26 splitter only applies to PNAs with serial number prefix <6021. 5-28 Keysight N5247B Service Guide...

  • Page 201: A23 Test Set Motherboard

    Connector settings can be changed using SCPI and COM commands. The settings are not accessible from the front panel. PWR I/O A DB-9 female connector. Pin assignments are listed in Table 5-5 on page 5-32. Keysight N5247B Service Guide 5-29...
  • Page 202 TTL out, test set select bit 3, tied to 0 V 19–21 AD7–5 TTL I/O, address and latched data 22–23 AD0–1 TTL I/O, address and latched data TTL out, active low data strobe (1 μs min) TTL out, high = read, low = write 5-30 Keysight N5247B Service Guide...
  • Page 203 TTL out, latched, indicates pass fail (programmable polarity) +5 V +5 Vdc, 100 mA max. Sweep End TTL out, active low (10 ms min) indicates sweep done Pass/Fail Write TTL out, active low pass/fail write strobe (1 ms min) Strobe Keysight N5247B Service Guide 5-31...

  • Page 204: A70 4-Port And A75 2-Port Low Frequency Extension (Lfe) Board

    Power Button Open collector input Active low replicates power button key press. A70 4-Port and A75 2-Port Low Frequency Extension (LFE) Board Provides a 900 Hz to 100 MHz LFE signal for measurements. Refer to www.keysight.com/find/pna. 5-32 Keysight N5247B Service Guide...
  • Page 205 — LF output J5, Port 4, to be connected to the bias combiner Port 4. — 5 IF outputs J7, J11, J12, J13, J14, to be connected to the IF MUX board: A, B, C, D and R. Keysight N5247B Service Guide 5-33...
  • Page 206 Theory of Operation Synthesized Source Group Operation Figure 5-9 Block Diagram with Synthesizer Board and LFE Board Synthesizer Bias combiner 5-34 Keysight N5247B Service Guide...
  • Page 207 Theory of Operation Synthesized Source Group Operation Figure 5-10 2-Port with LFE Synthesizer Bias combiners Figure 5-11 4-Port with LFE Synthesizer Synthesizer Bias combiners Keysight N5247B Service Guide 5-35...
  • Page 208 Theory of Operation Synthesized Source Group Operation Figure 5-12 2-Port LFE with IF MUX Board Bias combiners Figure 5-13 4-Port LFE with IF MUX Board Bias combiners 5-36 Keysight N5247B Service Guide...
  • Page 209 0.12207 0.12207 to 2.000 to 4.000 4096 16384 0.12207 to 0.24414 0.24414 0.24414 to 2.000 to 4.000 2048 8192 0.24414 to 0.48828 0.48828 1. Some of the LFE options are not available on all models. Keysight N5247B Service Guide 5-37...
  • Page 210 2.000 to 4.000 31.25000 to 62.50000 62.50000 62.50000 to 2.000 to 4.000 62.50000 to 1000.0000 125.0000 < a. A15 Source synthesizer VCO column only applies to version 6 synthesizers in instruments with a s/n prefix 6021. 5-38 Keysight N5247B Service Guide...
  • Page 211 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 1. Some of the LFE options are not available on all models. Keysight N5247B Service Guide 5-39...
  • Page 212 1.99000 to DDS_CLK 31.25000 31.5000 to DDS_CLK 53.0000 53.0000 to DDS_CLK 62.50000 62.50000 to DDS_CLK 1000.0000 a. A15 Source synthesizer VCO column only applies to version 6 synthesizers in instruments with a s/n prefix < 6021. 5-40 Keysight N5247B Service Guide...
  • Page 213 7 synthesizers in instruments with a s/n prefix 6021 or that have ≥ been updated to version 7 synthesizers. 1. Some of the LFE options are not available on all models. Keysight N5247B Service Guide 5-41...
  • Page 214 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 2.000 to DDS_CLK 4.000 1. Some of the LFE options are not available on all models. 5-42 Keysight N5247B Service Guide...
  • Page 215 1.99000 to DDS_CLK 31.25000 31.5000 to DDS_CLK 53.0000 53.0000 to DDS_CLK 62.50000 62.50000 to DDS_CLK 1000.0000 a. A15 Source synthesizer VCO column only applies to version 6 synthesizers in instruments with a s/n prefix <6021. Keysight N5247B Service Guide 5-43...
  • Page 216 Version 6 synthesizers and below: Below 100MHz, the LFE option is enabled in the firmware. Depending on the frequency measured, the LFE board receiver will be in ‘mixer mode’ or in ‘direct conversion mode’. See also, “Version 7 synthesizers” on page 5-45. 5-44 Keysight N5247B Service Guide...
  • Page 217 LFE option. The two receiver modes, mixer and direct conversion, are used in different frequency bands. Figure 5-14 Frequency Bands Without LFE – Version 6 and Below Synthesizers (<6021) Figure 5-15 Frequency Bands with LFE – Version 6 and Below Synthesizers (<6021) Keysight N5247B Service Guide 5-45...

  • Page 218: Signal Separation Group Operation

    — the A32 port 2 reference coupler and the A27 mixer brick receiver R2 — the A29 port 1 reference coupler and the A33 test port 1 coupler — the A30 port 3 reference coupler and the A34 test port 3 coupler 5-46 Keysight N5247B Service Guide...

  • Page 219: A29-A32 Reference Couplers

    A33–A36 test port couplers. A33–A36 Test Port Couplers The test signals go into the through-line arm of the couplers, and from there to the test ports and the DUT. Keysight N5247B Service Guide 5-47...
  • Page 220 A, B, C, and D for 4-port models or inputs A and B for 2-port models. The coupling coefficient of the directional couplers is nominally 15 dB for all frequencies above 500 MHz. The coupling coefficient increases for frequencies below 500 MHz. 5-48 Keysight N5247B Service Guide...
  • Page 221 Theory of Operation Signal Separation Group Operation Figure 5-16 4-Port Signal Separation Group Keysight N5247B Service Guide 5-49...
  • Page 222 Theory of Operation Signal Separation Group Operation Figure 5-17 2-Port Signal Separation Group 5-50 Keysight N5247B Service Guide...

  • Page 223: A38-A41 50-Db Source Step Attenuators And A42-A45 Bias Tees (Optional)

    A29–A32 reference couplers. On 2-port models with Option 224, a mechanical switch is placed in the signal path of each test port between the A5 and A10 26.5 GHz sources and the A29–A32 reference couplers. Keysight N5247B Service Guide 5-51...
  • Page 224 These signals typically come from the analyzer’s two internal sources and are jumpered on the rear panel. 5-52 Keysight N5247B Service Guide...

  • Page 225: Receiver Group Operation

    (receivers A, B, C, and D for 4-port models and A and B for 2-port models) and the reference signals (receivers R1, R2, R3, and R4 for 4-port models and R1 and R2 for 2-port models) are mixed with a synthesized LO Keysight N5247B Service Guide 5-53...

  • Page 226: A24 If Multiplexer Board

    PULSE I/O Connector Pin Assignments DB-15 Female Connector Name Description IFGateAin IF pulse gate input A (TTL) IFGateBin IF pulse gate input B (TTL) 1. A26 splitter only applies to PNAs with serial number prefix <6021. 5-54 Keysight N5247B Service Guide...

  • Page 227: A16 Spam Board (Analog Description)

    (CPU). The digitized data is processed into magnitude and phase data by the DSP and sent to the CPU random access memory (RAM) by way of the peripheral component interconnect (PCI) bus. Keysight N5247B Service Guide 5-55...
  • Page 228 The processed and formatted data is finally routed to the display, and to the general-purpose interface bus (GPIB) for remote operation. Refer to “Digital Processing and Digital Control Group Operation” on page 5-59 for more information on signal processing. 5-56 Keysight N5247B Service Guide...
  • Page 229 Theory of Operation Receiver Group Operation Figure 5-18 4-Port Receiver Group Keysight N5247B Service Guide 5-57...
  • Page 230 Theory of Operation Receiver Group Operation Figure 5-19 2-Port Receiver Group 5-58 Keysight N5247B Service Guide...

  • Page 231: Digital Processing And Digital Control Group Operation

    A2 USB Board — A3 Display Assembly — Keypad Assembly — A18 System Motherboard — Data Acquisition and Processing Subgroup — A16 SPAM Board (Digital Description) — A21 CPU Board — A55 Solid State Drive Keysight N5247B Service Guide 5-59...
  • Page 232 Theory of Operation Digital Processing and Digital Control Group Operation Figure 5-20 Digital Processing and Digital Control Group 5-60 Keysight N5247B Service Guide...

  • Page 233: Front Panel Subgroup

    The video data received from the A21 CPU board includes the following: • digital TTL horizontal sync • digital TTL red video • blanking • digital TTL vertical sync • digital TTL green video • data clock • digital TTL blue video Keysight N5247B Service Guide 5-61...

  • Page 234: Data Acquisition And Processing Subgroup

    In addition, when the analyzer is in the system controller mode, the CPU controls peripheral devices through the peripheral port interfaces. Front panel settings are stored in SRAM, with a battery providing at least five years of backup storage when external power is off. 5-62 Keysight N5247B Service Guide...
  • Page 235 A21 CPU board. The full operating system and firmware for the network analyzer is stored on the A55 solid state drive. Keysight N5247B Service Guide 5-63...

  • Page 236: Power Supply Group Operation

    The +15 V standby supply remains on continuously whenever the power supply is plugged in. This supply is used to provide power to front panel LEDs and CPU components when the analyzer is turned off. 5-64 Keysight N5247B Service Guide...

  • Page 237: Noise Measurement Group Operation (Option 029)

    A9 Noise Receiver board. For frequencies between 10 MHz – 6 GHz, the noise signals bypass the A59 noise downconverter, going to the A9 noise receiver board, where the signals are amplified, filtered, and mixed with the LO synthesized signal to produce the IF noise signals. Keysight N5247B Service Guide 5-65...

  • Page 238: A9 Noise Receiver Board

    In the ADC, the signals are processed and converted to digital form at the sampling rate of 40 MHz. The digitized data is then sent to the A18 system motherboard via the data bus. 5-66 Keysight N5247B Service Guide...
  • Page 239 Theory of Operation Noise Measurement Group Operation (Option 029) Figure 5-21 Noise Measurement Group (Option 029) Keysight N5247B Service Guide 5-67...
  • Page 240 Theory of Operation Noise Measurement Group Operation (Option 029) 5-68 Keysight N5247B Service Guide...

  • Page 241: Replaceable Parts

    Service Guide Replaceable Parts Information in This Chapter This chapter: — identifies the replaceable parts for the Keysight PNA series microwave network analyzer. — includes several tables and illustrations to assist you in identifying the correct part for your analyzer.

  • Page 242: Ordering Information

    Ordering Information To order a part listed in the replaceable parts lists: — include the part number — indicate the quantity required — Contact Keysight Technologies for instructions on where to send the order. Refer to “Contacting Keysight” on page 2-7.

  • Page 243: Assembly Replacement Sequence

    Adjustments.” Step 5. Perform the necessary performance tests. Refer to Chapter 3, “Tests and Adjustments.” Step 6. Keysight personnel: see Figure 1-1 on page 1-6 to review where the calibration stickers should be placed on the PNA. Keysight N5247B Service Guide...

  • Page 244: Rebuilt-Exchange Assemblies

    — The defective assembly must be returned for credit under the terms of the rebuilt-exchange assembly program. — Spare assembly stock desired should be ordered using the new assembly part number. Keysight N5247B Service Guide...
  • Page 245 Replaceable Parts Rebuilt-Exchange Assemblies Figure 6-1 Module Exchange Procedure Keysight N5247B Service Guide...

  • Page 246: Replaceable Parts Listings

    Replaceable Parts Replaceable Parts Listings Replaceable Parts Listings This section contains the replacement part numbers and their descriptions for your Keysight microwave PNA. You can find the locations of replaceable parts in this section: — listed by reference designator in Table 6-1, or —...
  • Page 247 Testset motherboard Your option set determines which assemblies are in your PNA. Refer to IF multiplexer board “Bottom Assemblies and Cables by Option Set:” Table 6-2 on LO Multiplier/amplifier 26.5 (HMA26.5) page 6-10 Splitter Mixer Brick 1 Keysight N5247B Service Guide...
  • Page 248 Port 4 receiver step attenuator Port 2 receiver step attenuator Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch Combiner Solid state drive “Top Assemblies and Cables, All Options:” on page 6-10. Keysight N5247B Service Guide...
  • Page 249 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide...
  • Page 250 Miscellaneous — Service Tools on page 6-204 — Documentation on page 6-204 — GPIB Cables/GPIB Adapter on page 6-204 — Fuses on page 6-204 — Battery on page 6-204 — Analyzer Accessories on page 6-205 6-10 Keysight N5247B Service Guide...
  • Page 251 Replaceable Parts Listings Table 6-2 Part Number Listing by Type of Part Miscellaneous (Continued) — USB Accessories on page 6-205 — ESD Supplies on page 6-205 — Rack Mount Kits and Handle Kits on page 6-205 Keysight N5247B Service Guide 6-11...

  • Page 252: Front-Panel Assembly, Front Side, All Options

    Trim, bottom, goes on the outside, underneath the Front Frame frame ( (All PNA models) 0515-1946 Machine screw, M3 x 6 mm flat head (To attach lower dress panel overlay  frame to chassis.) Not Shown N5242-00048 Guard, jumper cables, side—2-Port & 4-Port 6-12 Keysight N5247B Service Guide...
  • Page 253 Not Shown N5242-00049 Guard, jumper cables, center—4-Port Not shown 5023-3074 Front handle a. Some options require 14 of the 0515-1946 screws to secure dress panel overlay subpanel. Figure 6-2 Front-panel Assembly, Front Side, All Options Keysight N5247B Service Guide 6-13...

  • Page 254: Front-Panel Assembly, Back Side, All Options

    Power switch board (PCA for Power button keypad) N5242-40014 Power button keypad Display assembly N9912-20043 Tape (To secure cable E5071-61653 to 2090-1140 LCD’s connector and to secure cable E5071-61653 to J8 on the Interface board) Display assembly (continued from previous page) 6-14 Keysight N5247B Service Guide...
  • Page 255 N5240-60073 Touch screen controller board cable N5242-60075 Cable, A3 LED Driver board (Backlight converter board) to interface board N5242-60074 Power switch cable E5071-61660 Wire assembly, RPG (to attach RPG board (N5240-63083) to Interface board (J10) Keysight N5247B Service Guide 6-15...
  • Page 256 Replaceable Parts Replaceable Parts Listings Figure 6-3 Front Panel Assembly, Back Side, All Options Figure 6-4 A3 Display Assembly with Interface Board/USB Assemblies 6-16 Keysight N5247B Service Guide...
  • Page 257 Replaceable Parts Replaceable Parts Listings Figure 6-5 A3 Display Assembly with LCD Display 2090-1140 (LED) and Side Brackets Keysight N5247B Service Guide 6-17...

  • Page 258: Top Assemblies And Cables, All Options, Serial Number Prefixes <6021

    Signal Processing ADC Module (SPAM) board Was N5240-600056 N5240-60074 13.5 GHz (source 2) synthesizer board (On 2-port models, this assembly is included only with Option 224.) N5242-60150 N5247-60002 System motherboard W1312-60376 Midplane board 0950-4934 Power supply 6-18 Keysight N5247B Service Guide...
  • Page 259 For more information on the N8985A SSD, refer to the Windows 10 Operating System Upgrade Kit Installation Note, available online at https://www.keysight.com/us/en/assets/9018-04733/installation-guides/9018-04733.pdf (N8985-90001). f. The lithium battery is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the Lithium Bat- tery” on page 7-90 for an illustration. Keysight N5247B Service Guide 6-19...
  • Page 260 Replaceable Parts Replaceable Parts Listings Figure 6-6 Top Assemblies, All Options, S/N Prefixes <6021 6-20 Keysight N5247B Service Guide...
  • Page 261 A7 port 1 40 GHz doubler P5 to W66 N5247-20096 A12 port 3 40 GHz doubler P5 to W68 (On 2-port models, W67 is included only with Option 224.) N5242-60012 A24 IF multiplexer board P3 to A16 SPAM board J1 Keysight N5247B Service Guide 6-21...
  • Page 262 A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Con- figurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-22 Keysight N5247B Service Guide...
  • Page 263 Replaceable Parts Replaceable Parts Listings Figure 6-7 Top Cables, All Cables—All Options, S/N Prefixes <6021 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models. Keysight N5247B Service Guide 6-23...
  • Page 264 Assy, DD 3x Synthesizer (for Options 22x, 40x, 41x, 425) N5240-69223 N5240-60222 Assy, DD 2x Synthesizer (for Options 20x, 21x) N5240-69222 N5240-60077 Signal Processing ADC Module (SPAM) board Was N5240-60056 not used N5247-60002 System motherboard W1312-60376 Midplane board 0950-4934 Power supply 6-24 Keysight N5247B Service Guide...
  • Page 265 For more information on the N8985A SSD, refer to the Windows 10 Operating System Upgrade Kit Installation Note, available online at https://www.keysight.com/us/en/assets/9018-04733/installation-guides/9018-04733.pdf (N8985-90001). e. The lithium battery is located inside the A21 CPU board assembly. Refer to “Removing and Replacing the Lithium Bat- tery” on page 7-90 for an illustration. Keysight N5247B Service Guide 6-25...
  • Page 266 Replaceable Parts Replaceable Parts Listings 6-26 Keysight N5247B Service Guide...
  • Page 267 Replaceable Parts Replaceable Parts Listings Figure 6-8 Top Assemblies, All Options, S/N Prefixes ≥6021 Keysight N5247B Service Guide 6-27...
  • Page 268 A15 13.5 GHz LO synthesizer board J5 to A25 HMA26.5 N5240-20125 Was:N5247-20110 N5247-20113 A7 port 1 40 GHz doubler P5 to W66 N5247-20096 A12 port 3 40 GHz doubler P5 to W68 (On 2-port models, W67 is included only with Option 224.) 6-28 Keysight N5247B Service Guide...
  • Page 269 A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Con- figurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-29...
  • Page 270 Replaceable Parts Replaceable Parts Listings Figure 6-9 Top Cables, All Cables—All Options, S/N Prefixes ≥6021 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models. 6-30 Keysight N5247B Service Guide...
  • Page 271 Replaceable Parts Replaceable Parts Listings Keysight N5247B Service Guide 6-31...

  • Page 272: 2-Port Configurations, Serial Number Prefixes <6021

    All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-32 Keysight N5247B Service Guide...
  • Page 273 Replaceable Parts Replaceable Parts Listings Figure 6-10 Bottom Assemblies, Standard 2-Port Configuration, Option 201, S/N Prefixes < 6201 Keysight N5247B Service Guide 6-33...
  • Page 274 A27 mixer brick (B) to A24 IF multiplexer (P201) W79-83 Refer to “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 6-34 Keysight N5247B Service Guide...
  • Page 275 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-35...
  • Page 276 Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. 6-36 Keysight N5247B Service Guide...
  • Page 277 HANDLER I/O to A23 test set motherboard J400  N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-37...
  • Page 278 Replaceable Parts Replaceable Parts Listings Figure 6-12 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes <6201 6-38 Keysight N5247B Service Guide...
  • Page 279 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-39...
  • Page 280 Replaceable Parts Replaceable Parts Listings Figure 6-13 Bottom Assemblies, 2-Port, Options 219, S/N Prefixes <6201 6-40 Keysight N5247B Service Guide...
  • Page 281 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT Keysight N5247B Service Guide 6-41...
  • Page 282 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-42 Keysight N5247B Service Guide...
  • Page 283 Bottom RF Cables, 2-Port, Options 219, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. Keysight N5247B Service Guide 6-43...
  • Page 284 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-44 Keysight N5247B Service Guide...
  • Page 285 Replaceable Parts Replaceable Parts Listings Figure 6-15 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 219, S/N Prefixes <6201 Keysight N5247B Service Guide 6-45...
  • Page 286 70 GHz doubler assembly port 1 70 GHz doubler assembly port SRC 2 OUT 1 70 GHz doubler assembly port SRC 2 OUT 2 70 GHz doubler assembly port 2 5087-7345 Tuner (Option 029 only) 6-46 Keysight N5247B Service Guide...
  • Page 287 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-47...
  • Page 288 Replaceable Parts Replaceable Parts Listings Figure 6-16 Bottom Assemblies, 2-Port, Option 224 with and without Option 029, S/N Prefixes <6201 A56, A57, A59, and A64 only with Option 029. 6-48 Keysight N5247B Service Guide...
  • Page 289 “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 N5247-60007 A60 port 1 70 GHz doubler J4 to A7 40 GHz doubler J500 Keysight N5247B Service Guide 6-49...
  • Page 290 PORT 3 SW TSET IN (J7) to A51 SRC2 OUT1 m. switch W138 N5247-20032 A53 port 2 mechanical switch to A63 70 GHz doubler W140 N5247-20033 A53 port 2 mechanical switch to A32 port 2 reference coupler 6-50 Keysight N5247B Service Guide...
  • Page 291 A59 noise receiver (downconverter) to A26 splitter (Option 029 only) W176 N5247-20185 A25 HMA26.5 to A28 mixer brick (2) – (2-ports with Option 029 only) W204 N5247-20184 RF cable, A25 HMA26.5 to A59 noise receiver (downconverter) – W207 (2-Port with Option 029 only) Keysight N5247B Service Guide 6-51...
  • Page 292 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-52 Keysight N5247B Service Guide...
  • Page 293 Bottom RF Cables, 2-Port, Options 224, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. Keysight N5247B Service Guide 6-53...
  • Page 294 Bottom RF Cables, 2-Port, Option 224 with Option 029, S/N Prefixes <6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes <6021” on page 6-21. 6-54 Keysight N5247B Service Guide...
  • Page 295 A63 port 2 70 GHz doubler J1 to A23 test set motherboard J6 N5247-60022 A23 test set motherboard J209 to A25 HMA26.5 J1 N5247-60018 A62 SRC 2 OUT 2 70 GHz doubler J1 to A23 test set motherboard J3 Keysight N5247B Service Guide 6-55...
  • Page 296 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-56 Keysight N5247B Service Guide...
  • Page 297 Replaceable Parts Replaceable Parts Listings Figure 6-19 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without Option 029, S/N Prefixes <6201 Cables 3, 11, 15, and 19 apply only with Option 029. Keysight N5247B Service Guide 6-57...

  • Page 298: 2-Port Configurations, Serial Number Prefixes ≥6021

    All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-58 Keysight N5247B Service Guide...
  • Page 299 Replaceable Parts Replaceable Parts Listings Figure 6-20 Bottom Assemblies, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-59...
  • Page 300 A27 mixer brick (B) to A24 IF multiplexer (P201) W79-83 Refer to “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-28. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 6-60 Keysight N5247B Service Guide...
  • Page 301 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-61...
  • Page 302 Bottom RF Cables, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-28. 6-62 Keysight N5247B Service Guide...
  • Page 303 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-63...
  • Page 304 Replaceable Parts Replaceable Parts Listings Figure 6-22 Bottom Ribbon Cables and Wire Harnesses, Standard 2-Port Configuration, Option 201, S/N Prefixes ≥6201 6-64 Keysight N5247B Service Guide...
  • Page 305 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-65...
  • Page 306 Replaceable Parts Replaceable Parts Listings Figure 6-23 Bottom Assemblies, 2-Port, Options 219, S/N Prefixes ≥6201 6-66 Keysight N5247B Service Guide...
  • Page 307 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT Keysight N5247B Service Guide 6-67...
  • Page 308 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-68 Keysight N5247B Service Guide...
  • Page 309 Bottom RF Cables, 2-Port, Options 219, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-28. Keysight N5247B Service Guide 6-69...
  • Page 310 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-70 Keysight N5247B Service Guide...
  • Page 311 Replaceable Parts Replaceable Parts Listings Figure 6-25 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Options 219, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-71...
  • Page 312 70 GHz doubler assembly port SRC 2 OUT 2 70 GHz doubler assembly port 2 5087-7345 Tuner (Option 029 only) N5240-60058 front-panel LED board  a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-4. 6-72 Keysight N5247B Service Guide...
  • Page 313 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-73...
  • Page 314 Replaceable Parts Replaceable Parts Listings Figure 6-26 Bottom Assemblies, 2-Port, Option 224 with and without Option 029, S/N Prefixes ≥6201 A56, A57, A59, and A64 only with Option 029. 6-74 Keysight N5247B Service Guide...
  • Page 315 “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-28. N5247-60006 A60 port 1 70 GHz doubler J2 to A7 40 GHz doubler J401 N5247-60007 A60 port 1 70 GHz doubler J4 to A7 40 GHz doubler J500 Keysight N5247B Service Guide 6-75...
  • Page 316 PORT 3 SW TSET IN (J7) to A51 SRC2 OUT1 m. switch W138 N5247-20032 A53 port 2 mechanical switch to A63 70 GHz doubler W140 N5247-20033 A53 port 2 mechanical switch to A32 port 2 reference coupler 6-76 Keysight N5247B Service Guide...
  • Page 317 A25 HMA26.5 to A28 mixer brick (2) W204 N5247-20184 RF cable, A25 HMA26.5 to A59 noise receiver (downconverter) – W207 (2-Port with Option 029 only) a. SR = semirigid coaxial cable; F = flexible coaxial cable Keysight N5247B Service Guide 6-77...
  • Page 318 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-78 Keysight N5247B Service Guide...
  • Page 319 Bottom RF Cables, 2-Port, Options 224, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-28. Keysight N5247B Service Guide 6-79...
  • Page 320 Bottom RF Cables, 2-Port, Option 224 with Option 029, S/N Prefixes ≥6201 *SPAM 5 boards use W149 & W150 for 2-ports. RF cables W80 & W82 apply to 4-Port models (not shown). See also “Top Cables, All Cables—All Options, S/N Prefixes ≥6021” on page 6-28. 6-80 Keysight N5247B Service Guide...
  • Page 321 A63 port 2 70 GHz doubler J1 to A23 test set motherboard J6 N5247-60022 A23 test set motherboard J209 to A25 HMA26.5 J1 N5247-60018 A62 SRC 2 OUT 2 70 GHz doubler J1 to A23 test set motherboard J3 Keysight N5247B Service Guide 6-81...
  • Page 322 HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-82 Keysight N5247B Service Guide...
  • Page 323 Replaceable Parts Replaceable Parts Listings Figure 6-29 Bottom Ribbon Cables and Wire Harnesses, 2-Port, Option 224 with and without Option 029, S/N Prefixes ≥6201 Cables 3, 11, 15, and 19 apply only with Option 029. Keysight N5247B Service Guide 6-83...

  • Page 324: 4-Port Configuration, Serial Number Prefixes <6021

    Reference mixer switch 5087-7336 70 GHz doubler assembly port 1 70 GHz doubler assembly port 3 70 GHz doubler assembly port 4 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R4) 6-84 Keysight N5247B Service Guide...
  • Page 325 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-85...
  • Page 326 Replaceable Parts Replaceable Parts Listings Figure 6-30 Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes <6201 6-86 Keysight N5247B Service Guide...
  • Page 327 A32 port 2 ref coupler to front-panel port 2 SOURCE OUT N5247-20018 Port 2 CPLR THRU to A36 port 2 coupler N5247-20076 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT N5247-20019 A36 port 2 coupler to front-panel port 2 CPLR ARM Keysight N5247B Service Guide 6-87...
  • Page 328 A28 mixer brick (R4) to A24 IF multiplexer (P414) N5242-60020 A28 mixer brick (R3) to A24 IF multiplexer (P413) N5242-60023 A28 mixer brick (C) to A24 IF multiplexer (P601) N5242-60013 A24 IF multiplexer board P203 to A16 SPAM board J2 6-88 Keysight N5247B Service Guide...
  • Page 329 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-89...
  • Page 330 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configu- rations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-90 Keysight N5247B Service Guide...
  • Page 331 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-91...
  • Page 332 Replaceable Parts Replaceable Parts Listings Figure 6-32 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes <6201 6-92 Keysight N5247B Service Guide...
  • Page 333 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R1) N5240-60058 front-panel LED board  a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-4. Keysight N5247B Service Guide 6-93...
  • Page 334 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-94 Keysight N5247B Service Guide...
  • Page 335 Replaceable Parts Replaceable Parts Listings Bottom Assemblies, 4-Port, Options 419 , S/N Prefixes <6201 Figure 6-33 Keysight N5247B Service Guide 6-95...
  • Page 336 A63 port 2 70 GHz doubler J2 to A8 40 GHz doubler J401 N5247-60009 A63 port 2 70 GHz doubler J4 to A8 40 GHz doubler J500 W101 N5247-20083 A29 port 1 reference coupler to A38 port 1 source attenuator 6-96 Keysight N5247B Service Guide...
  • Page 337 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-97...
  • Page 338 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-98 Keysight N5247B Service Guide...
  • Page 339 A30 port 3 reference coupler to A39 port 3 source attenuator W106 N5247-20009 A39 port 3 source attenuator to front-panel port 3 SOURCE OUT W107 N5247-20010 Port 3 CPLR THRU to A43 port 3 bias tee Keysight N5247B Service Guide 6-99...
  • Page 340 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-100 Keysight N5247B Service Guide...
  • Page 341 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-101...
  • Page 342 A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834 rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 6-102 Keysight N5247B Service Guide...
  • Page 343 Part Number Description Type Designator N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-103...
  • Page 344 Replaceable Parts Replaceable Parts Listings Figure 6-36 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Options 419, S/N Prefixes <6201 6-104 Keysight N5247B Service Guide...
  • Page 345 Port 4 receiver attenuator Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch Keysight N5247B Service Guide 6-105...
  • Page 346 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-106 Keysight N5247B Service Guide...
  • Page 347 Replaceable Parts Replaceable Parts Listings Figure 6-37 Bottom Assemblies, 4-Port, Option 423 with and without 029, S/N Prefixes <6201 Keysight N5247B Service Guide 6-107...
  • Page 348 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT 6-108 Keysight N5247B Service Guide...
  • Page 349 “Top Assemblies and Cables, All Options, Serial Number Prefixes <6021” on W172, page 6-18. W173 W174 N5247-20143 A59 noise receiver (downconverter) to A28 mixer brick W175 Refer to “Top Assemblies and Cables, All Options, Serial Number Prefixes <6021” on page 6-18. Keysight N5247B Service Guide 6-109...
  • Page 350 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-110 Keysight N5247B Service Guide...
  • Page 351 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-111...
  • Page 352 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-112 Keysight N5247B Service Guide...
  • Page 353 Port 3 CPLR THRU to A43 port 3 bias tee W108 N5247-20028 A43 port 3 bias tee to A34 port 3 coupler W109 N5247-20083 A31 port 4 reference coupler to A40 port 4 source attenuator Keysight N5247B Service Guide 6-113...
  • Page 354 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-114 Keysight N5247B Service Guide...
  • Page 355 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-115...
  • Page 356 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-116 Keysight N5247B Service Guide...
  • Page 357 J41 port 2). Refer to “4-Port Configuration, Option 423 with and without Option 029, S/N Prefixes <6201” on page 6-105. (Option 029 only) N5245-60006 A23 test set motherboard J548 to A40 port 4 source attenuator Keysight N5247B Service Guide 6-117...
  • Page 358 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-118 Keysight N5247B Service Guide...
  • Page 359 Replaceable Parts Replaceable Parts Listings Figure 6-42 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without Option 029, S/N Prefixes <6201 Cables 3, 18, 21, and 26 apply only with Option 029. Keysight N5247B Service Guide 6-119...
  • Page 360 Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch 5087-7344 noise receiver (downconverter) 6-120 Keysight N5247B Service Guide...
  • Page 361 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-121...
  • Page 362 Replaceable Parts Replaceable Parts Listings Figure 6-43 Bottom Assemblies, 4-Port, Option 425 with and without Option 029, S/N Prefixes <6021 A56, A57, A59 and A64 onl ith Option 029 6-122 Keysight N5247B Service Guide...
  • Page 363 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT W117 N5247-20013 Front-panel port 1 RCVR A IN to A46 port 1 receiver attenuator W118 N5247-20047 A46 port 1 receiver attenuator to A27 mixer brick (A) Keysight N5247B Service Guide 6-123...
  • Page 364 6-18. (Option 029 only) W181 N5247-20167 Cable, assy-RF, Port 1 CPLR THRU to A71 port 1 bias combiner (Option 425 only withOUT Option 029) W182 N5247-20162 Cable, assy-RF, A71 Bias combiner-A33 Coupler FP, Port 1 6-124 Keysight N5247B Service Guide...
  • Page 365 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-125...
  • Page 366 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-126 Keysight N5247B Service Guide...
  • Page 367 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-127...
  • Page 368 A40 port 4 source attenuator to front-panel port 4 SOURCE OUT W119 N5247-20008 Port 3 RCVR C IN to A47 port 3 receiver attenuator W120 N5247-20064 A47 port 3 receiver attenuator to A28 mixer brick (C) 6-128 Keysight N5247B Service Guide...
  • Page 369 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-129...
  • Page 370 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-130 Keysight N5247B Service Guide...
  • Page 371 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-131...
  • Page 372 P/O A57 port 2 noise bypass switch (to A59 noise receiver (downconverter) J41 port 2). Refer to “4-Port Configuration, Option 425 with and without 029, S/N Prefixes <6021” on page 6-120. (Option 029 only) N5245-60006 A23 test set motherboard J548 to A40 port 4 source attenuator 6-132 Keysight N5247B Service Guide...
  • Page 373 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-133...
  • Page 374 Replaceable Parts Replaceable Parts Listings Figure 6-48 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without Option 029 , S/N Prefixes <6021 Cables 3, 13, 21, and 26 apply only with Option 029. 6-134 Keysight N5247B Service Guide...
  • Page 375 Replaceable Parts Replaceable Parts Listings Keysight N5247B Service Guide 6-135...

  • Page 376: 4-Port Configurations, Serial Number Prefix ≥6021

    70 GHz doubler assembly port 1 70 GHz doubler assembly port 3 70 GHz doubler assembly port 4 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R1) N5240-60058 front-panel LED board  6-136 Keysight N5247B Service Guide...
  • Page 377 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-137...
  • Page 378 Replaceable Parts Replaceable Parts Listings Figure 6-49 Bottom Assemblies, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6201 6-138 Keysight N5247B Service Guide...
  • Page 379 A32 port 2 ref coupler to front-panel port 2 SOURCE OUT N5247-20018 Port 2 CPLR THRU to A36 port 2 coupler N5247-20076 A32 port 2 ref coupler to front-panel REF 2 SOURCE OUT N5247-20019 A36 port 2 coupler to front-panel port 2 CPLR ARM Keysight N5247B Service Guide 6-139...
  • Page 380 A28 mixer brick (R4) to A24 IF multiplexer (P414) N5242-60020 A28 mixer brick (R3) to A24 IF multiplexer (P413) N5242-60023 A28 mixer brick (C) to A24 IF multiplexer (P601) N5242-60013 A24 IF multiplexer board P203 to A16 SPAM board J2 6-140 Keysight N5247B Service Guide...
  • Page 381 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-141...
  • Page 382 Replaceable Parts Replaceable Parts Listings Figure 6-50 Bottom RF Cables, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6201 6-142 Keysight N5247B Service Guide...
  • Page 383 Replaceable Parts Replaceable Parts Listings This page intentionally left blank. Keysight N5247B Service Guide 6-143...
  • Page 384 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-144 Keysight N5247B Service Guide...
  • Page 385 Replaceable Parts Replaceable Parts Listings Figure 6-51 Bottom Ribbon Cables and Wire Harnesses, Standard 4-Port Configuration, Option 401, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-145...
  • Page 386 70 GHz doubler assembly port 2 08490-60037 3-dB attenuator (A28 mixer brick (R1) N5240-60058 front-panel LED board  a. Part numbers in italic typeface are for rebuilt exchange assemblies. Refer to “Rebuilt-Exchange Assemblies” on page 6-4. 6-146 Keysight N5247B Service Guide...
  • Page 387 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-147...
  • Page 388 Replaceable Parts Replaceable Parts Listings Figure 6-52 Bottom Assemblies, 4-Port, Options 419, S/N Prefixes ≥6201 6-148 Keysight N5247B Service Guide...
  • Page 389 A63 port 2 70 GHz doubler J2 to A8 40 GHz doubler J401 N5247-60009 A63 port 2 70 GHz doubler J4 to A8 40 GHz doubler J500 W101 N5247-20083 A29 port 1 reference coupler to A38 port 1 source attenuator Keysight N5247B Service Guide 6-149...
  • Page 390 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-150 Keysight N5247B Service Guide...
  • Page 391 Replaceable Parts Replaceable Parts Listings Figure 6-53 Bottom RF Cables, 4-Port, Options 419 (Ports 1 and 2), S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-151...
  • Page 392 A30 port 3 reference coupler to A39 port 3 source attenuator W106 N5247-20009 A39 port 3 source attenuator to front-panel port 3 SOURCE OUT W107 N5247-20010 Port 3 CPLR THRU to A43 port 3 bias tee 6-152 Keysight N5247B Service Guide...
  • Page 393 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-153...
  • Page 394 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-154 Keysight N5247B Service Guide...
  • Page 395 A24 IF multiplexer board J1 E4410-60160 A18 system motherboard J13 to A23 test set motherboard J545 8121-0834 rear-panel HANDLER I/O to A23 test set motherboard J400 N5247-60014 A23 test set motherboard J551 to A27 mixer brick (1) J52 Keysight N5247B Service Guide 6-155...
  • Page 396 Part Number Description Type Designator N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-156 Keysight N5247B Service Guide...
  • Page 397 Replaceable Parts Replaceable Parts Listings Figure 6-55 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Options 419, S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-157...
  • Page 398 Port 4 receiver attenuator Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch 6-158 Keysight N5247B Service Guide...
  • Page 399 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. Keysight N5247B Service Guide 6-159...
  • Page 400 Replaceable Parts Replaceable Parts Listings Figure 6-56 Bottom Assemblies, 4-Port, Option 423 with and without 029, S/N Prefixes ≥ 6201 6-160 Keysight N5247B Service Guide...
  • Page 401 A33 port 1 coupler to A42 port 1 bias tee W113 N5247-20083 A32 port 2 reference coupler to A41 port 2 source attenuator W114 N5247-20034 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT Keysight N5247B Service Guide 6-161...
  • Page 402 A59 noise receiver (downconverter) to A28 mixer brick W175 Refer to “Top Assemblies and Cables, All Options, Serial Number Prefixes ≥6021” on page 6-24. a. SR = semirigid coaxial cable; F = flexible coaxial cable 6-162 Keysight N5247B Service Guide...
  • Page 403 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page Keysight N5247B Service Guide 6-163...
  • Page 404 Replaceable Parts Replaceable Parts Listings ≥ Figure 6-57 Bottom RF Cables, 4-Port, Options 423 (Ports 1 and 2), S/N Prefixes 6201 Option 423 with 029 is shown, but similar to Option 423 without Option 029 6-164 Keysight N5247B Service Guide...
  • Page 405 Replaceable Parts Replaceable Parts Listings Figure 6-58 Bottom RF Cables, 4-Port, Option 423 with Option 029 (Ports 1 and 2), S/N Prefixes ≥ 6201 Keysight N5247B Service Guide 6-165...
  • Page 406 Port 3 CPLR THRU to A43 port 3 bias tee W108 N5247-20028 A43 port 3 bias tee to A34 port 3 coupler W109 N5247-20083 A31 port 4 reference coupler to A40 port 4 source attenuator 6-166 Keysight N5247B Service Guide...
  • Page 407 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 6-167...
  • Page 408 Replaceable Parts Replaceable Parts Listings Figure 6-59 Bottom RF Cables, 4-Port, Options 423 (Ports 3 and 4), S/N Prefixes ≥6201 Option 423 with 029 is shown, but similar to Option 423 without Option 029 6-168 Keysight N5247B Service Guide...
  • Page 409 Replaceable Parts Replaceable Parts Listings Figure 6-60 Bottom RF Cables, 4-Port, Option 423 with Option 029 (Ports 3 and 4), S/N Prefixes ≥6201 Keysight N5247B Service Guide 6-169...
  • Page 410 J41 port 2). Refer to “4-Port Configuration, Option 423 with and without Option 029, S/N Prefixes ≥6201” on page 6-158. (Option 029 only) N5245-60006 A23 test set motherboard J548 to A40 port 4 source attenuator 6-170 Keysight N5247B Service Guide...
  • Page 411 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness Keysight N5247B Service Guide 6-171...
  • Page 412 Replaceable Parts Replaceable Parts Listings Figure 6-61 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 423 with and without Option 029, S/N Prefixes ≥6201 Cables 3, 18, 21, and 26 apply only with Option 029. 6-172 Keysight N5247B Service Guide...
  • Page 413 Port 2 receiver attenuator N1811-60010 Port 1 mechanical switch Port 3 mechanical switch Port 4 mechanical switch Port 2 mechanical switch 11667-60016 Combiner N1811-60010 Port 1 noise bypass switch Port 2 noise bypass switch 5087-7344 noise receiver (downconverter) Keysight N5247B Service Guide 6-173...
  • Page 414 All new units built after August 2009, no longer use the N5242-60031 cable that was attached to connector P1001 and Source 2. As a result of this change, the IF multiplexer boards have had their P1001 connectors removed. If your instrument contains a N5242-60031 cable, remove it from your instrument. 6-174 Keysight N5247B Service Guide...
  • Page 415 Replaceable Parts Replaceable Parts Listings Figure 6-62 Bottom Assemblies, 4-Port, Option 425 with and without Option 029, S/N Prefixes ≥6021 A56, A57, A59, and A64 only with Option 029. Keysight N5247B Service Guide 6-175...
  • Page 416 A41 port 2 source attenuator to front-panel port 2 SOURCE OUT W117 N5247-20013 Front-panel port 1 RCVR A IN to A46 port 1 receiver attenuator W118 N5247-20047 A46 port 1 receiver attenuator to A27 mixer brick (A) 6-176 Keysight N5247B Service Guide...
  • Page 417 Cable, assy-RF, FP port 1 CPLR THRU to A71 port 1 bias combiner (Option 425 only withOUT Option 029) W182 N5247-20162 Cable, assy-RF, A71 Bias T combiner-A33 Coupler FP, Port 1 W187 N5247-20163 Cable, assy-RF, FP port 2 CPLR THRU to A74 bias combiner (Option 425 only) Keysight N5247B Service Guide 6-177...
  • Page 418 HMA26.5 the N5245-20100 cable is used in all instruments. If you are unclear which HMA26.5 assembly your PNA has installed, refer to “Verify the Model/Version of HMA26.5 Installed” on page 7-40 and to Figure 7-17 on page 6-178 Keysight N5247B Service Guide...
  • Page 419 Replaceable Parts Replaceable Parts Listings Figure 6-63 Bottom RF Cables, 4-Port, Options 425 (Ports 1 and 2), S/N Prefixes ≥6021 Keysight N5247B Service Guide 6-179...
  • Page 420 Replaceable Parts Replaceable Parts Listings Figure 6-64 Bottom RF Cables, 4-Port, Option 425 with Option 029 (Ports 1 and 2), S/N Prefixes ≥6021 6-180 Keysight N5247B Service Guide...
  • Page 421 A40 port 4 source attenuator to front-panel port 4 SOURCE OUT W119 N5247-20008 Port 3 RCVR C IN to A47 port 3 receiver attenuator W120 N5247-20064 A47 port 3 receiver attenuator to A28 mixer brick (C) Keysight N5247B Service Guide 6-181...
  • Page 422 Figure 7-17 on page 40 and for details on A26 splitter and cabling , refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 6-182 Keysight N5247B Service Guide...
  • Page 423 Replaceable Parts Replaceable Parts Listings Figure 6-65 Bottom RF Cables, 4-Port, Options 425 (Ports 3 and 4), S/N Prefixes ≥6021 Keysight N5247B Service Guide 6-183...
  • Page 424 Replaceable Parts Replaceable Parts Listings Figure 6-66 Bottom RF Cables, 4-Port, Option 425 with Option 029 (Ports 3 and 4), S/N Prefixes ≥6021 6-184 Keysight N5247B Service Guide...
  • Page 425 Option 029, S/N Prefixes ≥6201” on page 6-158. P/O A52 port 4 mechanical switch (to A23 test set motherboard J103). Refer to “4-Port Configuration, Option 423 with and without Option 029, S/N Prefixes ≥6201” on page 6-158. Keysight N5247B Service Guide 6-185...
  • Page 426 A23 test set motherboard J551 to A27 mixer brick (1) J52 N5247-60015 A23 test set motherboard J552 to A28 mixer brick (2) J52 a. nR = n wires in a ribbon (flat) cable; nW = n wires in a wire harness 6-186 Keysight N5247B Service Guide...
  • Page 427 Replaceable Parts Replaceable Parts Listings Figure 6-67 Bottom Ribbon Cables and Wire Harnesses, 4-Port, Option 425 with and without Option 029, S/N Prefixes ≥6021 Cables 3, 13, 21, and 26 apply only with Option 029. Keysight N5247B Service Guide 6-187...
  • Page 428 Replaceable Parts Replaceable Parts Listings 6-188 Keysight N5247B Service Guide...

  • Page 429: Rear-Panel Assembly, All Options

    Termination, 50 ohm load (2 used for Option 201. 219; 3 used for Option 224, 400, 419, 423) Was: 1810-0118 8121-0834 HANDLER I/O cable assembly Ferrite for ribbon cable 8121-0834 9170-2236 2190-0068 Lock washer (for rear-panel BNC connectors) 2950-0054 Hex nut (for rear-panel BNC connectors) Keysight N5247B Service Guide 6-189...
  • Page 430 Termination, 2.4 mm 50 GHz load (1 used for Option 224 and 423) Was N5247-20138 a. This part number is no longer required on s/n’s 5541, 5542, 5544, 5545, 5547, 5549 and newer. But, is included for your ref- erence. 6-190 Keysight N5247B Service Guide...
  • Page 431 Replaceable Parts Replaceable Parts Listings Figure 6-68 Rear-Panel Assembly, All Options Keysight N5247B Service Guide 6-191...
  • Page 432 Fan bracket (for 3 fans)  0515-0372 Machine screw, M3.0 x 8, pan head (To attach: fan assemblies to chassis.)  Chassis (Refer to “Internal Hardware and Miscellaneous Parts, All Options” on page 6-200.)  6-192 Keysight N5247B Service Guide...
  • Page 433 Replaceable Parts Replaceable Parts Listings Figure 6-69 Fan Assemblies, Side View, All Options Keysight N5247B Service Guide 6-193...
  • Page 434 (2). (On 2-port models, source (2) is included only with Option 224.) not shown 0515-0666 Machine screw, M3.0 x 18, pan head (To attach source brackets to source (1) and source (2). (On 2-port models, source (2) is included only with Option 224.) 6-194 Keysight N5247B Service Guide...
  • Page 435 Replaceable Parts Replaceable Parts Listings Figure 6-70 Top Hardware and Miscellaneous Parts, Top View, All Options Keysight N5247B Service Guide 6-195...
  • Page 436 Option 029 tuner to side of test set deck.) N5235-00018 Bracket, Ribbon Cable Clamp N5247-20135 Mounting block (For A27 & A28 mixer bricks.) N5247-00002 Test set deck N5247-00006 Bracket, rear, bottom side - for semi rigid cables (Option 224 and 4-port models only.) 6-196 Keysight N5247B Service Guide...
  • Page 437 Washers for bulkhead connectors (Option 224 only.) 5064-7891 Bulkhead connectors (Option 224 only.) 0515-1521 Machine screw, M3.0 x 5, flat head (To attach front-panel LED boards.) 5022-1087 Test port coupler dress nut (One for each coupler.) Keysight N5247B Service Guide 6-197...
  • Page 438 Cross bracket on test set deck N5245-00033 Bracket, A56 and A57 noise bypass switches (Option 029) 0515-1992 Machine screw M5.0 x 20 pan head (To attach noise bypass switch bracket to side of test set deck.) 6-198 Keysight N5247B Service Guide...
  • Page 439 Replaceable Parts Replaceable Parts Listings Figure 6-71 Bottom Hardware and Miscellaneous Parts Keysight N5247B Service Guide 6-199...
  • Page 440 (long) center.) N5247-00013 Front bracket  N5242-40002 PC board guides   N5240-20136 Bracket Center, long Not shown 5023-3074 Front handle 6-200 Keysight N5247B Service Guide...
  • Page 441 Replaceable Parts Replaceable Parts Listings Figure 6-72 Internal Hardware and Miscellaneous Parts, All Options Keysight N5247B Service Guide 6-201...
  • Page 442 Not shown 5041-9174 Side strips for front handle Not shown 0515-2044 Machine screw, M4.0 x 12 flat head (To attach front handle to chassis.) Not shown N9040-40007 Front impact cover Not shown N9040-40008 Rear impact cover 6-202 Keysight N5247B Service Guide...
  • Page 443 Replaceable Parts Replaceable Parts Listings Figure 6-73 External Hardware and Miscellaneous Parts, All Options Keysight N5247B Service Guide 6-203...
  • Page 444 Installation and Quick Start Guide (for all PNA series analyzers) (Cannot be ordered. Part number E8356-90001 is for reference only. Must be printed from the Keysight Web site.) Service Guide. (Not available in printed form. Part number is for reference only. Must be printed N5247-90001 from the Keysight Web site.)
  • Page 445 N5231AU-1CP or N5232AU-1CP or N5239AU-1CP Option 1CP includes the following separately orderable items: Rack mount kit (rack mount flanges and hardware) 5063-1555 Rack mount rail set E3663AC 5063-1542 Front handle kit (two classic handles and hardware) Keysight N5247B Service Guide 6-205...
  • Page 446 N5247B analyzer. Refer to the section, “Analyzer Options, Accessories, and Upgrades Available” on page 2-3, for a complete description of each option included in the upgrades. 6-206 Keysight N5247B Service Guide...
  • Page 447 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide Repair and Replacement Procedures Before replacing the A23 board, if possible: Run EEBackup.exe using the directory for your Windows operating system: Windows 7 OS: C:/Program Files (x86)/Agilent/Network Analyzer/Service/EEBackup.exe. Click on Save EEPROM Backup, and then click on Backup TSMB Memory.
  • Page 448 Repair and Replacement Procedures Information in This Chapter Information in This Chapter This chapter contains procedures for removing and replacing the major assemblies of your Keysight Technologies PNA series microwave network analyzer. Chapter Seven at-a-Glance Section Title Summary of Content...
  • Page 449 The front panel switch is only a standby switch and is not a LINE switch (disconnecting device) Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended. Discard used batteries according to manufacturer’s instructions. Keysight N5247B Service Guide...
  • Page 450 To reduce the chance of electrostatic discharge, follow all of the recommendations outlined in “Electrostatic Discharge Protection” on page 1-7, for all of the procedures in this chapter. Keysight N5247B Service Guide...
  • Page 451 Port 1 reference coupler Port 3 reference coupler Port 4 reference coupler Port 2 reference coupler page 7-48 Port 1 test port coupler Port 3 test port coupler Port 4 test port coupler Port 2 test port coupler Keysight N5247B Service Guide...
  • Page 452 Port 1 LFE Bias-T combiner - port 3 Port 1 LFE Bias-T combiner - port 4 Port 1 LFE Bias-T combiner - port 2 Rear panel page 7-84 Front panel LED boards page 7-86 Fans page 7-88 Keysight N5247B Service Guide...
  • Page 453 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide...
  • Page 454 Ribbon cables and wires must never be positioned on top of hardware. 3. Reverse the order of the removal procedures above. Keysight N5247B Service Guide...
  • Page 455 Repair and Replacement Procedures Removing the Covers Figure 7-1 Outer and Inner Cover Removal Keysight N5247B Service Guide...
  • Page 456 When reconnecting the front-panel jumpers, torque the connectors to 10 in-lb. 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-10 Keysight N5247B Service Guide...
  • Page 457 Repair and Replacement Procedures Removing and Replacing the Front Panel Assembly Figure 7-2 Front Panel Assembly Removal Keysight N5247B Service Guide 7-11...
  • Page 458 3. Disconnect the following cables from the A1 front panel interface board: tape (item [14]) from connector and the LCD display to interface board cable (item [18]), LED driver board (backlight converter board) to interface 7-12 Keysight N5247B Service Guide...
  • Page 459 4. Remove two screws (item ) and remove the power switch board. 5. The power button keypad can now be removed from the power switch board by gently pulling each of the rubber tabs through the PC board. Keysight N5247B Service Guide 7-13...
  • Page 460 9. With a T-6 TORX (set to 3-in-lb), remove the 2 screws (item [23]) on the side bracket that has the LCD cable (item [18]) attached to the LCD display. During re-assembly of the side brackets to the LCD display, it is very important to avoid over-tightening. 7-14 Keysight N5247B Service Guide...
  • Page 461 11. The touch screen can now be removed from the front panel assembly. Note the orientation of the touch screen in the front panel assembly for installation of the new touch screen. Figure 7-3 Front Panel Sub-assemblies Removal Keysight N5247B Service Guide 7-15...
  • Page 462 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-4 A3 Display Assembly with LCD Display - Cables Figure 7-5 Remove LCD Cable, LCD to LED Inverter Board Cable, & Side Brackets 7-16 Keysight N5247B Service Guide...
  • Page 463 Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-6 Remove LCD Mounting Plate to LCD Display & LCD Display Cable Figure 7-7 Removing the Flat Flex Cable from the LCD to the Controller Board Keysight N5247B Service Guide 7-17...
  • Page 464 Repair and Replacement Procedures Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Figure 7-8 Power Keypad to Power Button Board Figure 7-9 Remove Speaker Assembly and Mounting Foam 7-18 Keysight N5247B Service Guide...
  • Page 465 Removing and Replacing the A1–A3 and Other Front Panel Subassemblies Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-19...
  • Page 466 Lift the two extractors (item ), one at each end of the board. Adjust the slack in the gray flexible cable as needed to move it out of the way, and lift the board out of the chassis. 7-20 Keysight N5247B Service Guide...
  • Page 467 If you have a new A15 version 7 synthesizer assembly installed, the A15 assembly will not perform correctly and will cause the PNA to display errors until the EE Default Adjustment synthesizer adjustments are completed, as per Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-21...
  • Page 468 Repair and Replacement Procedures Removing and Replacing the A4–A17 Boards This page intentionally left blank. 7-22 Keysight N5247B Service Guide...
  • Page 469 A18 System Motherboard. Refer to Figure 6-72 on page 6-201 for steps 14 and 15. 14. Remove four screws (item A) that secure the bottom of the midplane bracket to the chassis. Keysight N5247B Service Guide 7-23...
  • Page 470 Keep them for reinstallation on the replacement motherboard. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-24 Keysight N5247B Service Guide...
  • Page 471 Repair and Replacement Procedures Removing and Replacing the A18 System Motherboard Figure 7-10 A18 System Motherboard Removal Keysight N5247B Service Guide 7-25...
  • Page 472 Remember to install the six rubber grommets on the bottom three alignment pins. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-26 Keysight N5247B Service Guide...
  • Page 473 Repair and Replacement Procedures Removing and Replacing the A19 Midplane Board Figure 7-11 A19 Midplane Board Removal Keysight N5247B Service Guide 7-27...
  • Page 474 5. Slide the A20 power supply assembly out the rear of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-28 Keysight N5247B Service Guide...
  • Page 475 Repair and Replacement Procedures Removing and Replacing the A20 Power Supply Assembly Figure 7-12 A20 Power Supply Assembly Removal Keysight N5247B Service Guide 7-29...
  • Page 476 A21 CPU board assembly, adhere it to the outer cover in the location specified in Figure 7-10 on page 7-25. 3. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-30 Keysight N5247B Service Guide...
  • Page 477 Repair and Replacement Procedures Removing and Replacing the A21 CPU Board Assembly Figure 7-13 A21 CPU Board Assembly Removal Keysight N5247B Service Guide 7-31...
  • Page 478 6. Slide the A22 GPIB board out the rear of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-32 Keysight N5247B Service Guide...
  • Page 479 Repair and Replacement Procedures Removing and Replacing the A22 GPIB Board Figure 7-14 A22 GPIB Board Removal Keysight N5247B Service Guide 7-33...
  • Page 480 Click on Save EEPROM Backup, and then click on Backup TSMB Memory. Windows 10 OS (32-bit): C:/Program Files (x86)/Keysight/Network Analyzer/Service/EEBackup.exe. Click on Save EEPROM Backup, and then click on Backup TSMB Memory. The firmware revision numbers for Win10 (32-bit) are A.13.30.xx through A.13.95.xx.
  • Page 481 Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-35...
  • Page 482 Torque rear panel RF connector nuts to 21 in-lbs and PULSE I/O connector screws to 6 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-36 Keysight N5247B Service Guide...
  • Page 483 Repair and Replacement Procedures Removing and Replacing the A24 IF Multiplexer Board Figure 7-15 A24 IF Multiplexer Board Removal Keysight N5247B Service Guide 7-37...
  • Page 484 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Pre- fixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-38 Keysight N5247B Service Guide...
  • Page 485 Repair and Replacement Procedures Removing and Replacing the A25 HMA26.5 Figure 7-16 A25 HMA26.5 Removal Keysight N5247B Service Guide 7-39...
  • Page 486 — W63 N5245-20023 — W64 N5245-20022 The new N5240-60101 HMA26.5 has the splitter integrated into the assembly. Refer to Figure 7-17 on page 7-40. Figure 7-17 Comparison of Legacy HMA26.5 (5087-7765) and New HMA26.5 (N5240-60101) 7-40 Keysight N5247B Service Guide...
  • Page 487 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. Keysight N5247B Service Guide 7-41...
  • Page 488 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-42 Keysight N5247B Service Guide...
  • Page 489 9. If replacing a mixer brick, remove 3 screws (not shown) that fasten each mixer brick to the mixer brick mounting block.  10. If replacing the A28 mixer brick, remove the 3 dB pad (item ) and keep it for reinstallation on the replacement mixer brick. Keysight N5247B Service Guide 7-43...
  • Page 490 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-44 Keysight N5247B Service Guide...
  • Page 491 Orient the position of the reference couplers and brackets as shown in Figure 7-21. Torque all RF connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-45...
  • Page 492 Figure 7-17 on page 40 and for details on A26 splitter and cabling, refer to your option-model in Chapter 6 “2-Port Configurations, Serial Number Prefixes <6021” on page 6-32 “4-Port Configuration, Serial Number Prefixes <6021” on page 6-84. 7-46 Keysight N5247B Service Guide...
  • Page 493 Repair and Replacement Procedures Removing and Replacing the A29 –A32 Reference Couplers and Reference Coupler Mounting Brackets Figure 7-21 Orientation of Reference Couplers with Brackets Keysight N5247B Service Guide 7-47...
  • Page 494 ) to the new coupler in the same location as on the old one. If necessary, replace  the vibration mount (item ). Refer to “Bottom Hardware and Miscellaneous Parts” on page 6-196 for replacement part numbers. 7-48 Keysight N5247B Service Guide...
  • Page 495 Torque all connectors to 10 in-lbs. Torque coupler nuts to 72 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-22 A33 through A36 Test Port Couplers Removal Keysight N5247B Service Guide 7-49...
  • Page 496 ) and torque the connectors to 10 in-lbs, then tighten the  two mounting screws (item 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-50 Keysight N5247B Service Guide...
  • Page 497 Repair and Replacement Procedures Removing and Replacing the A37 Reference Mixer Switch Figure 7-23 A37 Reference Mixer Switch Removal Keysight N5247B Service Guide 7-51...
  • Page 498 8. Remove two screws (not shown) from each attenuator to be removed from the mounting bracket. 7-52 Keysight N5247B Service Guide...
  • Page 499 Torque all cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-24 Source and Receiver Attenuators Keysight N5247B Service Guide 7-53...
  • Page 500 Repair and Replacement Procedures Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver Attenuators Figure 7-25 Orientation of Source and Receiver Attenuators with Brackets 7-54 Keysight N5247B Service Guide...
  • Page 501 Orient the position of the bias tees and block as shown in Figure 7-27. Torque all cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Keysight N5247B Service Guide 7-55...
  • Page 502 Repair and Replacement Procedures Removing and Replacing the A42–A45 Bias Tees Figure 7-26 A42 through A45 Bias Tees Removal Figure 7-27 Orientation of Bias Tees with Block 7-56 Keysight N5247B Service Guide...
  • Page 503 7. Disconnect the wire harness cable of the bypass switch to be removed from the test set motherboard. 8. Remove two screws that attach the bypass switch or the A54 combiner to its bracket. Keysight N5247B Service Guide 7-57...
  • Page 504 Orient the A54 combiner so that the INPUT label is facing up. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-28 A50 through A53 Bypass Switches and A54 Combiner Removal 7-58 Keysight N5247B Service Guide...
  • Page 505 Repair and Replacement Procedures Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner Figure 7-29 Orientation of Bypass Switches with Bracket Keysight N5247B Service Guide 7-59...
  • Page 506 — If installing an SSD for Windows XP: if the user has loaded unique calibration kit information, navigate to C:\Program Files\Keysight\Network Analyzer and copy USER_CALKITFILE to a USB flash memory drive. Also copy any personal user files that you wish to preserve.
  • Page 507 Install Backup Files Onto the New Solid State Drive The files that were previously saved onto a USB flash memory drive must now be installed onto the new SSD. The network analyzer must be powered up and operating. Keysight N5247B Service Guide 7-61...
  • Page 508 Disconnect these cables and remove the doubler mounting bracket, with the two doublers attached, from the analyzer. 9. Remove three screws that attach the doubler to be replaced to its mounting bracket, and remove the doubler from the bracket. 7-62 Keysight N5247B Service Guide...
  • Page 509 Torque all cable connections to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-31 A60 through A63 70 GHz Doublers Removal Keysight N5247B Service Guide 7-63...
  • Page 510 7. Move the disconnected semirigid cables out of the way and remove the switch from the analyzer. It may be necessary to loosen the other end of the cables to allow them to be moved. Do not overbend them. 7-64 Keysight N5247B Service Guide...
  • Page 511 Torque all cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-32 A56 Port 1 Noise Bypass Switch Removal Keysight N5247B Service Guide 7-65...
  • Page 512 7. Move the disconnected semirigid cables out of the way and remove the switch from the analyzer. It may be necessary to loosen the other end of the cables to allow them to be moved. Do not overbend them. 7-66 Keysight N5247B Service Guide...
  • Page 513 Torque all cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-33 A57 Port 2 Noise Bypass Switch Removal Keysight N5247B Service Guide 7-67...
  • Page 514 1. Reverse the order of the removal procedure reusing the existing hardware. Torque all cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-68 Keysight N5247B Service Guide...
  • Page 515 Repair and Replacement Procedures Removing and Replacing the A59 Noise Receiver (downconverter) – (Option 029) Figure 7-34 A59 noise receiver (downconverter) Removal Keysight N5247B Service Guide 7-69...
  • Page 516 1. Reverse the order of the removal procedure reusing the existing hardware. Torque all cable connectors to 10 in-lbs. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-70 Keysight N5247B Service Guide...
  • Page 517 Repair and Replacement Procedures Removing and Replacing the A64 Tuner (Option 029) Figure 7-35 A64 Tuner Removal Keysight N5247B Service Guide 7-71...
  • Page 518 2. Remove the outer cover. Refer to “Removing the Covers” on page 7-8. 3. Position the analyzer bottom side up. 4. Remove the A23 test set motherboard. Refer to “Removing and Replacing the A23 Test Set Motherboard” on page 7-34. 7-72 Keysight N5247B Service Guide...
  • Page 519 Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board 5. Disconnect the 8121-2919 and N5245-60005 ribbon cables. Refer to Figure 7-36 on page 7-73. Figure 7-36 Disconnect Ribbon Cables from Rear Panel Connectors (8121-2919, N5245-60005) Keysight N5247B Service Guide 7-73...
  • Page 520 Figure 7-37 on page 7-74. — For Version 7 Synthesizers, refer to Figure 7-38 on page 7-75. Figure 7-37 Version 6 Synthesizers: A70 4-Port LFE Board Remove Cables (8120-5014 (x2), 8120-5017 (x3), N5242-60079, N5242-60027, N5242-60080). 7-74 Keysight N5247B Service Guide...
  • Page 521 Repair and Replacement Procedures Removing and Replacing the A70 or A75 Low Frequency Extension (LFE) Board Figure 7-38 Version 7 Synthesizers: A70 4-Port LFE Board Remove Cables (8120-5014 (x2), 8120-5017 (x3), N5242-60079, N5242-60027, N5242-60080). Keysight N5247B Service Guide 7-75...
  • Page 522 Remove A71 bias combiner cable (N5240-60097) from “Port1” connector on the A70 LFE board N5240-60097 8. A70 LFE boards only: Remove port 3 bias combiner “RF IN” cable from the “Port3” connector on the LFE board. Similar to Figure 7-39 on page 7-76. 7-76 Keysight N5247B Service Guide...
  • Page 523 A74 port 2 bias combiner cable (N5240-60097) from “Port2” connector on the A70 LFE board 10. A70 LFE boards only: Remove port 4 bias combiner “RF IN” cable from the “Port4” connector on the LFE board. Similar to Figure 7-40 on page 7-77. Keysight N5247B Service Guide 7-77...
  • Page 524 Attach the new A70/A75 LFE board to the standoffs using the screws removed from the old one. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-78 Keysight N5247B Service Guide...
  • Page 525 6. Remove two screws from the bias tee combiner and bracket-to-chassis  assembly to be removed (Do item only). Refer to Figure 7-43 on page 7-81.  Do not remove the bias combiner from the bracket yet (item is done in step Keysight N5247B Service Guide 7-79...
  • Page 526 Figure 7-43 on page 7-81, position the bias tees on the attenuator brackets as indicated. 3. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-80 Keysight N5247B Service Guide...
  • Page 527 A71–A74 Bias Tee Combiners and Cables Removal. (N5222B Option 420 Shown. All Other PNA LFE Options are Similar. Figure 7-43 Remove Bias Combiner Bracket Assemblies from the Chassis (N5245-00036/N5245-00037, 0515-0372, 5087-7403, 0515-1227). (All Assemblies are Shown, but Only Remove the Defective Assembly.) Keysight N5247B Service Guide 7-81...
  • Page 528 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-44 Remove DC Bias Cable from Bias Combiner (N5240-60091) Figure 7-45 Remove Bias Combiner, Cables, and Clamps (5023-3299, 5087-7403, 0515-2141, and N5240-60097 (x2)) -60097 7-82 Keysight N5247B Service Guide...
  • Page 529 Repair and Replacement Procedures Removing and Replacing the A71–A74 Bias Tee Combiners Figure 7-46 Mark Bias Combiner With a Permanent Marker Keysight N5247B Service Guide 7-83...
  • Page 530 11. Slide the rear panel over the cable connectors and off of the analyzer. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-84 Keysight N5247B Service Guide...
  • Page 531 Repair and Replacement Procedures Removing and Replacing the Rear Panel Figure 7-47 Rear Panel Removal Keysight N5247B Service Guide 7-85...
  • Page 532 6-71 on page 6-199. Replacement Procedure 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-86 Keysight N5247B Service Guide...
  • Page 533 Repair and Replacement Procedures Removing and Replacing the Front Panel LED Boards This page intentionally left blank. Keysight N5247B Service Guide 7-87...
  • Page 534 Pull up the center pin of each of the fan rivets as shown by (item in the illustration.  c. Pull out the rivet completely (as shown by (item ) in the illustration) to release the fan and fan guard. 7-88 Keysight N5247B Service Guide...
  • Page 535 1. Reverse the order of the removal procedure. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. Figure 7-48 B1 Fan Removal Keysight N5247B Service Guide 7-89...
  • Page 536 1. Reverse the order of the removal procedure following all instructions included with the new battery. 2. Perform the post-repair adjustments, verifications, and performance tests that pertain to this removal procedure. Refer to Table 7-2 on page 7-92. 7-90 Keysight N5247B Service Guide...
  • Page 537 Repair and Replacement Procedures Removing and Replacing the Lithium Battery Figure 7-49 Lithium Battery Removal Keysight N5247B Service Guide 7-91...
  • Page 538 No adjustment needed Front Panel Keypad and RPG Test A3 Display Test Chapter 4 A2 USB board No adjustment needed Check for proper operation A3 display assembly Touchscreen Adjustment and A3 Display Test Chapter 4 Verification 7-92 Keysight N5247B Service Guide...
  • Page 539 A9 Noise receiver board (Option “Noise Figure Adjustment Receiver Noise Figure Test Noise Jitter Test (Available with Option 029 with 029) S93029A/B Installed)” on Noise Receiver Linearity Test page 3-62 Noise State Calibration Coefficients Noise Receiver Compression Test Keysight N5247B Service Guide 7-93...
  • Page 540 Source Adjustment The Operator’s Check IF Gain Adjustment Receiver Characterization Receiver Adjustment IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Restore option data (Refer to “Repairing and Recovering Option Data” Chapter 7-94 Keysight N5247B Service Guide...
  • Page 541 (Zipped) Folder. Email this zipped folder to csg.servicedesk@keysigh t.com with a note that it should be forwarded to PNA Customer Support. A16 SPAM board Noise Floor Test IF Gain Adjustment Receiver Characterization Trace Noise Test Keysight N5247B Service Guide 7-95...
  • Page 542 Reinstall the serial number. (Refer to “Installing or Changing a Serial Number” Chapter 8 Re-enable all hardware options. (Refer “Software Entitlement Certificate” Chapter 8 IF Gain Adjustment The Operator’s Check A24 IF multiplexer board Receiver Adjustment 7-96 Keysight N5247B Service Guide...
  • Page 543 IF Gain Adjustment Source Power Accuracy Test Receiver Characterization Source Maximum Power Receiver Adjustment Output Test IF Response Adjustment Source Power Linearity Test (Available Only with Option The Operator’s Check S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Keysight N5247B Service Guide 7-97...
  • Page 544 Source Adjustment Source Maximum Power A42–A45 bias tees IF Gain Adjustment Output Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment Source Power Accuracy Test IF Response Adjustment (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) 7-98 Keysight N5247B Service Guide...
  • Page 545 Source Power Accuracy Test Receiver Characterization Calibration Coefficients Test Receiver Adjustment Resetting the Mechanical IF Response Adjustment Counter (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) Keysight N5247B Service Guide 7-99...
  • Page 546 Receiver Adjustment Calibration Coefficients Test IF Response Adjustment The Operator’s Check (Available Only with Option S93093/4A/B and or S93900/1/2/4/5/7A/B Installed) Noise Figure Adjustment (Available with Option 029 with S93029A/B Installed) LFE Receiver Adjustment (Option 425) 7-100 Keysight N5247B Service Guide...
  • Page 547 Table 7-2 on page 7-92 d. For the most current information on the "Verification, Performance, and Other Tests and Procedures" column’s content, refer to https://cal.software.keysight.com/PNA/Help/N7840AWebHelp.htm. Resetting the Mechanical Counter This process is to be performed anytime an attenuator or a bypass switch is replaced in an a PNA.
  • Page 548 The adjustments listed here generate new correction constants. The analyzer must have a backup of this new data in case any of the data becomes corrupted. To store the backup data, perform these steps: — Navigate to the EEPROM Backup Utility, located at: 7-102 Keysight N5247B Service Guide...
  • Page 549 Repair and Replacement Procedures Post-Repair Procedures — Windows 7 -- C:\Program Files (x86)\Keysight\Network Analyzer\Service\eebackup.exe — Windows 10 -- C:\Program Files\Keysight\Network Analyzer\Service\eebackup.exe — Run the program. — Click Backup EEPROM. — Click Backup TSMB Mem. — Click Backup Synth Mem. (Applies to Version 7 Synthesizers Only) —...
  • Page 550 Repair and Replacement Procedures Post-Repair Procedures 7-104 Keysight N5247B Service Guide...
  • Page 551 Keysight Microwave Network Analyzers 2-Port and 4-Port PNA-X Service Guide General Purpose Maintenance Procedures Information in This Chapter Chapter Eight at-a-Glance Section Title Summary of Content Start Page Error Terms How to use error terms as a preventive maintenance and page 8-2 troubleshooting tool.
  • Page 552 You can use the error terms as a tool to isolate faulty assemblies in the signal separation group of your analyzer. You can compare the current values to preventive maintenance records or to the typical values listed in Table 8-1 on page 8-8. Keysight N5247B Service Guide...
  • Page 553 Figure 8-4 illustrate the error terms associated with measurement calibration for 1-port, 2-port, 3-port, and 4-port configurations respectively. Figure 8-1 Flowgraph of One-Port Error Terms for Port 1 where: E = Error term Subscript: D = Directivity Keysight N5247B Service Guide...
  • Page 554 R = Reflection Tracking X = Crosstalk (Isolation) L = Load Match T = Transmission Tracking 2nd Subscript: F = forward measurement (Ports 1 to Port 2) R = reverse measurement (Ports 2 to Port 1) Keysight N5247B Service Guide...
  • Page 555 For the case of a full 3-port calibration, port 1 has three Match error terms: S11 source match S12 load match S13 load match and three Tracking error terms: S11 reflection tracking S12 transmission tracking S13 transmission tracking There are six isolation terms not shown. Keysight N5247B Service Guide...
  • Page 556 Tracking error terms: S11 reflection tracking S12 transmission tracking S13 transmission tracking S12 transmission tracking There are eight isolation (crosstalk) terms not shown. Accessing Error Terms Error terms can be accessed either manually or programmatically: Manually Keysight N5247B Service Guide...
  • Page 557 You can access error terms by way of Component Object Model (COM) or Distributed Component Object Model (DCOM) software architecture. For more information on COM and DCOM, refer to the embedded help in the analyzer. Type in keyword “errors, systematic” in the index. Keysight N5247B Service Guide...
  • Page 558 All crosstalk values are typical. Measurement conditions: normalized to a thru, measured with two shorts, 10 Hz IF bandwidth, averaging factor of 8, alternate mode, source power set to the lesser of the maximum power out or the maximum receiver power. Keysight N5247B Service Guide...
  • Page 559 2-port device. The match of test port cables is included in this response. Load match error terms are characterized by measuring the S and S responses of a “thru” configuration during the calibration procedure. Keysight N5247B Service Guide...
  • Page 560 After verifying the cable and its connections, suspect the analyzer switch splitter, step attenuator, coupler, or receivers, and associated cabling. To troubleshoot, refer to “Checking the Receiver Group” on page 4-52 or to “Checking the Signal Separation Group” on page 4-47. 8-10 Keysight N5247B Service Guide...
  • Page 561 Keysight License Manager Accessing the Keysight License Manager To start the Keysight License Manager: — Press Start > Keysight License Manager > Keysight License Manager . A Keysight License Manager dialog box will appear. Figure 8-5 Keysight License Manager Window Software Entitlement Certificate If you have received an “Software Entitlement Certificate”, follow the...
  • Page 562 Keysight License Manager (KLM). Refer to https://www.keysight.com/us/en/assets/9018-04534/installation-guides /9018-04534.pdf (N5242-90024). Some applications require a license key file that is provided by Keysight. If you do not have the required license key file, contact Keysight for assistance. Refer to “Contacting Keysight” on page 2-7.
  • Page 563 It is necessary to reinstall the instrument serial number if the test set midplane board is replaced. To change an incorrect serial number, it is necessary for your instrument to be connected directly to the LAN and to a Keysight IP network. Refer to “Contacting Keysight” on page 2-7.
  • Page 564 — Press UTILITY , then Service , then AgileUpdate System AgileUpdate compares the firmware revision currently installed in your network analyzer to the latest version available and assists you in downloading and installing the most recent version. 8-14 Keysight N5247B Service Guide...
  • Page 565 If you suspect that you have a solid state drive problem, go to the “Hard Drive Recovery” link on the Keysight PNA Series: Service & Support Home Page on the Internet. The URL for the Keysight PNA Series – Service & Support Home Page is: https://support.keysight.com/s/ The URL for the Hard Drive Recovery page is: https://www.keysight.com/us/en/assets/9922-01369/miscellaneous/PNA-H...
  • Page 566 General Purpose Maintenance Procedures Correction Constants 8-16 Keysight N5247B Service Guide...
  • Page 567 Keysight Technologies - Appendix N52xxB Microwave Network Analyzers Service Guide EEPROM Address Assignments and Location (N5227A&B PNA and N5247A&B PNA-X Instruments) Table A-1 EEPROM Address Assignments and Location Hex Addr Physical Location Board Rev Letter Cal Body Contents E080 A16 SPAM...
  • Page 568 EEPROM Address Assignments and Location (N5227A&B PNA and N5247A&B PNA-X Instruments) Table A-1 (Continued)EEPROM Address Assignments and Location Hex Addr Physical Location Board Rev Letter Cal Body Contents E600 A5 Source 1 Unused E680 – – E700 – – E780 –...
  • Page 569 Installation Note Xxxxx-xxxxx...
  • Page 570 This information is subject to change without notice. © Keysight Technologies 2011-2023 Edition 1, June 2023 N5247-90026 www.keysight.com...

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