Service Guide N5242-90001 7-55
PNA Series Microwave Network Analyzers Repair and Replacement Procedures
N5242A Removing and Replacing the A54 Option 029 Test Port 2 Bridge and the A55 Option 029 Noise Downconverter
Replacement Procedure
1. Reverse the order of the removal procedure.
• When reassembling the A54/A55 assembly, lay the assemblies on a flat surface while
installing and tightening the interconnecting cable (adapter) to ensure that these
assemblies will be flush with the side frame when installed.
• Torque all cable connections to 10 in-lbs.
2. Perform the post-repair adjustments, verifications, and performance tests that pertain
to this removal procedure. Refer to Table 7-2 on page 7-64.
Figure 7-25 A54 Option 029 Test Port Bridge and A55 Noise Downconverter Removal
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