Service Guide E8364-90038 4-47
PNA Series Microwave Network Analyzers Troubleshooting
E8362C, E8363C, E8364C Measurement System Troubleshooting
Checking the A13 Frequency Offset Receiver Band 0 Output
Perform this procedure if you observe a problem in band 0 and all signals from the A12 source 20 output are
present.
1. Refer to the block diagram at the end of this chapter and to “Bottom Flexible Cables, All Options” on
page 6-66. Locate the flexible cable W116 at the frequency offset receiver output.
CAUTION Be careful not to damage the center pins of the semirigid cable. Some flexing of the cables is
necessary to measure the output.
2. Disconnect the flexible cable at the frequency offset receiver.
3. Connect the spectrum analyzer to the frequency offset receiver connector J6.
4. Set the network analyzer to a CW frequency of 25 MHz.
• The spectrum analyzer should measure a signal at 1.04 MHz.
5. If the measured signal is not present, Replace the A13 receiver. Refer to “Removing and Replacing the
A13 Frequency Offset Receiver Assembly” on page 7-24.
6. If the signals are present, reconnect W116, and then continue with “Checking the A45 and A46 Switches
(Option 081 Only)” on page 4-47.
Checking the A45 and A46 Switches (Option 081 Only)
NOTE Before continuing, perform the Operator’s check “The Operator’s Check” on page 3-10. If the
instrument passes the operator’s check then the A45 and A46 switches are ok.
If you are still experiencing problems, and your instrument has passed all troubleshooting
tests to this point, then contact Agilent (refer to “Contacting Agilent” on page 2-12).
Perform this procedure if the instrument has passed all the frequency offset receiver tests but fails the
operator’s check and the problem appears to be at the A45 or A46 switches.
• Refer to the block diagram at the end of this chapter, to “Bottom Assemblies, Options 014/080/081” on
page 6-46, and to “Bottom Flexible Cables, All Options” on page 6-66. Locate the semirigid cable W60 on
the front panel. Locate the semirigid cables W96 and W99 at the A45 switch input and A45 output
respectively.
CAUTION Be careful not to damage the center pins of the semirigid cable. Some flexing of the cables is
necessary to measure the output.
1. Disconnect the W60 semirigid cable from the front panel.
2. Connect the spectrum analyzer to the
Source Out port.
3. From the
Channel menu, click Test S et . In the Te s t S e t dialog box, click External: flow through R1 loop. Click
OK.
4. Set the network analyzer to a CW frequency of 1 GHz.
• The spectrum analyzer should measure a signal at 1 GHz.
5. If the measured signal is not present, replace A46 switch. Refer to “Removing and Replacing the A45
and A46 Reference Channel Transfer Switches (Option 081)” on page 7-72.
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