342 Keysight N9038A MXE Service Guide
Analog & Digital IF
A3 Digital I.F. Troubleshooting
A3 Digital I.F. Troubleshooting
Assembly Initialization
Before the A3 Digital IF assembly will function properly it needs to initialize
itself when the instrument is turned on and be recognized by the instrument
software. The first step in verifying that this has happened is to look at the
instrument Hardware Information screen. To view this information press
System, Show, Hardware. Once you do this you will see a listing of instrument
hardware assemblies that are installed. The A3 Digital IF assembly should
identify itself on this list as Digital IF. If this assembly does not identify itself the
cause for this will need to be determined before any other troubleshooting is
performed. The most probable causes for this type of a problem would be:
— FPGA Code on the assembly is corrupt
Solution: Reload the FPGA code. See FPGA Synchronization in
Chapter 19, “Post-Repair Procedures”.
— An instrument power supply voltage is not operating properly
Solution: Verify all instrument power supply voltages. See Chapter
12, “Power Supply & Midplane”.
— A3 Digital IF assembly is defective
Solution: Replace the A3 Digital IF assembly
Refer to Chapter 15, “Block Diagrams”.
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