
8712ET/ES and 8714ET/ES Troubleshooting and Block Diagrams
RF Network Analyzers Category 3 Failures: Inaccurate (but reasonably functional) Measurements
Service Guide 4-37
RF Power Problems
Check all cables and cable connections on the receiver board; tighten if necessary.
If the problem is caused by a power hole, try moving the cables to see if the power hole
moves or disappears. If it does, the cable is probably defective.
If the analyzer has a step attenuator and the problem only occurs with the attenuator
engaged (<0 dBm for the 8712ET/ES and <−5 dBm for the 8714ET/ES), replace the step
attenuator assembly. Otherwise, replace the receiver assembly (A5). (Refer to “Removing
the Receiver PC Board” on page 3-14.)
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