Keysight Technologies N5290/1A PNA Series Service Manual page 56

System Tests and Adjustments
N5292A Functional Verification Procedure
— RF Fixture, Test Set Port Cabling and TSMB Verification – N5292-60128.
See Figure 3-11 on page 3-20.
Figure 3-11 S-Parameters fixture (N5292-60129), test set IF/RF port paths (from test set
to test set mother board (TSMB)) verification
3-20 Keysight N5290/1A Service Guide