Contents - safety notices
- 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 17025 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
- Receiver Compression Test
- Noise Floor Test
- Calibration Coefficients Test
- Dynamic Accuracy Test
- Adjustments
- Synthesizer Bandwidth Adjustment
- IF Gain Adjustment
- Receiver Adjustment
- EE Default Adjustment
- 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
- 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
- A21 Multiplier/Amplifier 26.5 Board (HMA26.5)
- Signal Separation Group Operation
- A25–A28 Receiver Couplers
- A34–A37 65-dB Source Step Attenuators and A38–A41 Bias Tees
- Receiver Group Operation
- A20 IF Multiplexer Board
- A12 SPAM Board (Analog Description)
- 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, Option 201
- Port Configuration, Option 210
- Port Configuration, Option 217
- Port Configuration, Option 219
- Port Configuration, Option 400
- Port Configuration, Option 401
- Port Configuration, Option 410
- Port Configuration, Option 417
- Port Configuration, Option 419
- 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 A4–A13 Boards
- 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 Receiver Couplers and 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 A51 Solid State Drive (SSD)
- 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
- 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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5-28 Keysight N5221A/22A Service GuideTheory of OperationDigital Processing and Digital Control Group Operation5-Front Panel SubgroupThe front panel subgroup contains the following assemblies:— A1 Front Panel Display Board— A2 USB Board— A3 Display Assembly— Keypad AssemblyA1 Front Panel Display BoardThe A1 front panel display board detects and decodes user inputs from thekeypad assembly and front panel knob, and transmits them to the A17 CPUboard by way of the A14 system motherboard. It also decodes video data fromthe video processor on the A17 CPU board and supplies this to the A3 displayassembly. Power from the power bus on the A14 system motherboard isbuffered and routed to the keypad assembly and the A3 display assembly. Alldata and power signals are routed through a single cable connector to the A14system motherboard.The A1 front panel interface board also includes a speaker that emits the audiosignals received from the A17 CPU board.A2 USB BoardThis board provides four universal serial bus (USB) jacks that are industrystandard 4-pin connectors allowing multiple USB devices to be connected tothe analyzer’s front panel.A3 Display AssemblyThe A3 display assembly contains an 10-inch LCD with associated drivecircuitry and backlight inverter. Two cables between the A3 display assemblyand the A1 front panel display board provide all necessary power and data fornormal operation. The two cables are:1. A cable to the inverter that supplies buffered power.2. A cable to the display circuitry that supplies decoded data from the videoprocessor on the A17 CPU board and the necessary drive circuit power.The video data received from the A17 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
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