Keysight NFA Series Noise Figure Analyzers Service Guide 405
Assembly Replacement Procedures
RF Area (N8973B, 74B, 75B)
Replacement
1. Refer to Figure 15-11. Position the attenuator in the bracket so that the
ribbon connector end is “up”.
2. Replace the two screws that attach the attenuator to the bracket. Torque
to 9 inch-pounds.
3. Position the attenuator and bracket into the chassis and attach with the
two screws. Torque to 9 inch-pounds.
4. Replace the ribbon cable and semi-rigid cables W9, W10, W11 and W19
to the attenuator. Torque the semi-rigid cables to 10 inch-pounds.
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