Agilent Technologies E8362A Service Manual page 109

PNA Series Microwave Network Analyzers
E8362A, E8363A, E8364A
R2 and B Traces
If both traces are affected, the problem is in the R2 phase lock loop.
If both traces are missing in all bands, the problem is in the A16 test set motherboard, the
A29 R2 first converter, the A33 R2 receiver, or the A22 switch splitter. To determine which
is at fault:
1. Bypass the A22 switch splitter using a flexible RF cable connected between the input
cable W2 and the R2 output cable W5.
2. If the R2 trace is now present, replace the A22 switch splitter. If the R2 trace is still
missing, reconnect the cables to the A22 switch splitter.
3. Swap the A33 R2 receiver with the A32 R1 receiver. (Each of the four receivers is
identical.)
4. If the missing trace is now R1 (still associated with the same A33 R2 receiver), replace
the A33 channel R2 receiver. If the R2 trace is still missing, replace the A16 test set
motherboard.
R1 Trace Only
A problem that affects only the R1 trace is isolated to the A28 R1 first converter, the A32
R1 receiver, or the A6 SPAM board. Go to
R2 Trace Only
A problem that affects only the R2 trace is isolated to the A29 R2 first converter, the A33
R2 receiver, or the A6 SPAM board. Go to
A Trace Only
If the trace is missing in all bands, go to
page 4-46.
B Trace Only
If the trace is missing in all bands, go to
page 4-46.
Service Guide E8364-90001
Measurement System Troubleshooting
"Checking the Receiver Group" on page
"Checking the Receiver Group" on page
"Checking the Signal Separation Group" on
"Checking the Signal Separation Group" on
Troubleshooting
4-50.
4-50.
4- 31