6-2 Service Guide
Digital Control Troubleshooting 8719ET/20ET/22ET
Information on This Chapter 8719ES/20ES/22ES
RF Network Analyzers
Information on This Chapter
Use this procedure only if you have read Chapter 4 , “Start Troubleshooting Here.”
The digital control group assemblies consist of the following:
• Front panel keyboard (A1)
• Front panel processor (A2)
• CPU board (A7)
• Source control board (A9)
• Digital IF board (A10)
• Rear panel (A16)
• Display (A18)
• GSP (Graphical System Processor) (A19)
• Test Set interface (A51)
Begin with “CPU Board (A7) Troubleshooting” on page 6-4, then proceed to the assembly
that you suspect has a problem. If you suspect a GPIB problem, refer to “GPIB Failures” on
page 6-19.