Keysight Technologies N9040B UXA Signal Analyzer Service Guide 407
Assembly Replacement Procedures
RF Area - Options 544, 550
3. Refer to Figure 15-55. Remove the cables W8, W33, W21, W18, W16,
W17, and W30 from the A13 Front End assembly. Some cables will not be
present if the instrument is not Option B5X.
Figure 15-55 Front End Assembly Cables Removal - Options 544, 550 (Option B5X shown)