Contents - safety notices
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Table Of Contents
- Information in This Chapter
- Safety Symbols
- General Safety Considerations
- Servicing
- Electrostatic Discharge Protection
- Regulatory Information
- Lithium Battery Disposal
- Maintenance
- Analyzer Options, Accessories, and Upgrades Available
- Required Service Test Equipment
- Keysight Support, Services, and Assistance
- Shipping Your Analyzer to Keysight for Service or Repair
- Before You Begin
- Allow the Analyzer to Warm Up
- About System Verification and Performance Tests
- Instrument Specifications
- Certificate of Calibration
- ANSI/NCSL Z540.3–2006 and ISO/IEC Verification
- Non-Standards Compliant Verification
- Preliminary Checks
- The Test Port Cable Checks
- System Verification
- Measurement Traceability
- Performing System Verification
- Performance Tests
- Source Maximum Power Output Test
- Source Power Linearity Test
- Frequency Accuracy Test
- Trace Noise Test
- Receiver Compression Test
- Noise Floor Test
- Calibration Coefficients Test
- Dynamic Accuracy Test – Version 1
- Dynamic Accuracy Test – Version 2
- System Noise Figure Test
- Noise Jitter Test
- Noise Receiver Compression Test
- Adjustments
- Synthesizer Bandwidth Adjustment
- IF Gain Adjustment
- Receiver Adjustment
- EE Default Adjustment
- Noise Figure Adjustment (Available Only with Option 029 Installed)
- Chapter Four at-a-Glance
- Operating the Analyzer With Covers Removed
- Protect Against Electrostatic Discharge (ESD)
- Assembly Replacement Sequence
- Getting Started with Troubleshooting
- Power Up Troubleshooting
- Power Supply Check
- Troubleshooting LCD Display Problems
- Front Panel Troubleshooting
- A3 Display Test
- A1 Front Panel Interface Board
- Rear Panel Troubleshooting
- LAN Troubleshooting
- Measurement System Troubleshooting
- Verifying the A, B, C, D, and R Traces (Standard S-Parameter Mode)
- Where to Begin Troubleshooting
- Checking the Source Group
- Checking the Signal Separation Group
- Checking the Receiver Group
- Instrument Block Diagrams Sheet 1
- Instrument Block Diagrams Sheet 2
- Instrument Block Diagrams Sheet 3
- Instrument Block Diagrams Sheet 4
- Network Analyzer System Operation
- Functional Groups of the Network Analyzer
- Synthesized Source Group Operation
- A4, A13, and A11 13.5 GHz Synthesizer Boards
- A5 and A8 26.5 GHz Source Boards
- A10 Frequency Reference Board
- Signal Separation Group Operation
- A25–A28 Bridges
- A34–A37 65-dB Source Step Attenuators and A38–A41 Bias Tees (Optional)
- Receiver Group Operation
- A20 IF Multiplexer Board
- A12 SPAM Board (Analog Description)
- Noise Measurement Group Operation (Option 029)
- A7 Noise Receiver Board
- Digital Processing and Digital Control Group Operation
- Front Panel Subgroup
- Data Acquisition and Processing Subgroup
- Power Supply Group Operation
- Ordering Information
- Rebuilt-Exchange Assemblies
- Replaceable Parts Listings
- Front Panel Assembly, Front Side, All Options
- Front Panel Assembly, Back Side, All Options
- Top Assemblies and Cables, All Options
- Port Configuration, Option 200
- Port Configuration, Options 200/219
- Port Configuration, Options 200/219/029
- Port Configuration, Options 200/219/H85
- Port Configuration, Options 200/219/029/H85
- Port Configuration, Options 200/219/224
- Port Configuration, Options 200/219/224/029
- Port Configuration, Options 200/219/224/H85
- Port Configuration, Options 200/219/224/029/H85
- Port Configuration, Option 400
- Port Configuration, Options 400/419
- Port Configuration, Options 400/419/029
- Port Configuration, Options 400/419/H85
- Port Configuration, Options 400/419/029/H85
- Port Configuration, Options 400/419/423
- Port Configuration, Options 400/419/423/029
- Port Configuration, Options 400/419/423/H85
- Port Configuration, Options 400/419/423/029/H85
- Rear Panel Assembly, All Options
- Top Hardware and Miscellaneous Parts, All Options
- Bottom Hardware and Miscellaneous Parts
- Internal Hardware and Miscellaneous Parts, All Options
- External Hardware and Miscellaneous Parts, All Options
- Miscellaneous Part Numbers
- Personal Safety Warnings
- Electrostatic Discharge (ESD) Protection
- Removal and Replacement Procedures
- Removing the Covers
- Removing and Replacing the Front Panel Assembly
- Removing and Replacing the A1–A3 and Other Front Panel Subassemblies
- Removing and Replacing the A14 System Motherboard
- Removing and Replacing the A15 Midplane Board
- Removing and Replacing the A16 Power Supply Assembly
- Removing and Replacing the A17 CPU Board Assembly
- Removing and Replacing the A18 GPIB Board
- Removing and Replacing the A19 Test Set Motherboard
- Removing and Replacing the A20 IF Multiplexer Board
- Removing and Replacing the A21 HMA26.5
- Removing and Replacing the A22 Splitter
- Removing and Replacing the A23 and A24 Mixer Bricks
- Removing and Replacing the A25–A28 Bridges and Bridge Mounting Brackets
- Removing and Replacing the A29–A32 Test Port Couplers
- Removing and Replacing the A33 Reference Mixer Switch
- A42–A45 Receiver Attenuators
- Removing and Replacing the A38–A41 Bias Tees
- Removing and Replacing the A46–A49 Bypass Switches and the A50 Combiner
- Removing and Replacing the A51 Hard Disk Drive (HDDA) or Solid State Drive (SSD)
- Removing and Replacing the A52 and A53 Option 029 Test Port Switches
- Downconverter
- Removing and Replacing the Rear Panel
- Removing and Replacing the Front Panel LED Boards
- Removing and Replacing the Fans
- Removing and Replacing the Lithium Battery
- Post-Repair Procedures
- Error Terms
- Performing Measurement Calibration
- Using Flowgraphs to Identify Error Terms
- Accessing Error Terms
- Error Term Data
- Option Enable Utility
- Enabling or Removing Options
- Repairing and Recovering Option Data
- Installing or Changing a Serial Number
- Firmware Upgrades
- Operating System Recovery
- Correction Constants
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Keysight N5241A/42A/49A Service Guide 3-47Tests and AdjustmentsPerformance Tests4. This process is repeated for each of the three gain stages since each stagerequires a different power setting.5. Steps 3 and 4 are repeated using the high frequency power sensor.6. The test cable and attenuator are attached to Port 2.7. A receiver measurement is made at the calibration level and the receiverresponse is normalized.8. The Port 1 source attenuator is set such that the power level matches thecompression level and another sweep is made. The source powercalibration is adjusted for any deviation from the expected power levelchange.9. Steps 7 and 8 are repeated for each of the three gain stages.10.The analyzer is set for a noise power density measurement using the noisereceiver and a standard receiver measurement using the B receiver.11.The source power calibration for the appropriate gain stage is applied anda sweep is made.12.The source attenuator is set for an additional 10 dB and another sweep ismade.13.The noise receiver compression is calculated as the difference betweenthe noise power density measurements minus the difference between thestandard receiver measurements. The standard receiver is operatingwithin its linear range, so it is used as the linearity standard for thismeasurement.14.Steps 11 to 13 are repeated for each of the three gain stages.If the Analyzer Fails this Test:A failure of this test indicates a fault in the noise receiver chain. This canindicate a faulty assembly or a loose cable.— Check for proper torquing of all semi-rigid cables in the receiver chain, andthen repeat this test.— If the analyzer still fails this test, replace the A7 Noise Receiver board andrepeat this test. Refer to “Removing and Replacing the A4–A13 Boards (Foranalyzers with serial numbers prefixed MY/SG/US5150 and below.)” onpage 7-14 or “Removing and Replacing the A4–A13 Boards (For analyzerswith serial numbers prefixed MY/SG/US5201 and above.)” on page 7-17.
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