Service Guide E8364-90038 4-29
PNA Series Microwave Network Analyzers Troubleshooting
E8362C, E8363C, E8364C Measurement System Troubleshooting
R1 and A Traces
If both traces are affected, the problem is in the R1 phase lock loop.
• If both traces are missing in all bands, the problem is in the A16 test set motherboard, the A28 R1 first
converter, the A32 R1 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
R1 output cable W3.
2. If the R1 trace is now present, replace the A22 switch splitter. If the R1 trace is still missing, reconnect
the cables to the A22 switch splitter.
3. Swap the A32 R1 receiver with the A33 R2 receiver. (Each of the four receivers is identical.)
4. If the missing trace is now R2 (still associated with the same A32 R1 receiver), replace the A32 R1
receiver. If the R1 trace is still missing, replace the A16 test set motherboard.
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 W4.
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 “Checking the Receiver Group” on page 4-42.
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 “Checking the Receiver Group” on page 4-42.
A Trace Only
If the trace is missing in all bands, go to “Checking the Signal Separation Group” on page 4-38.
B Trace Only
If the trace is missing in all bands, go to “Checking the Signal Separation Group” on page 4-38.
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