Keysight N8973B User Manual

Keysight NFA Series Noise Figure Analyzers Service Guide 421
Assembly Replacement Procedures
RF Front End Assembly (N8973B, 74B, 75B)
Figure 15-24 RF Front End Assembly Removal
Replacement
1. Refer to Figure 15-24. Place the RF Front End Assembly into the chassis.
Replace the four screws (2). Torque to 9 inch-pounds in the sequence
shown, starting with #1.
2. Reattach ribbon cable W17 to the RF Front End Assembly.
3. Reattach the cables W3, W4, W5, W7, W15 or W36, and W20 to the RF
Front End Assembly (1). Torque the semi-rigid cables to 10 inch-pounds.
4. Replace the front panel. Refer to the “Front Frame Assembly” replacement
procedure.
5. Replace the instrument top brace. Refer to the “Top Brace” replacement
procedure.
6. Replace the instrument outer case. Refer to the “Instrument Outer Case”
replacement procedure.
W7 will not be present on the N8973B.

Keysight N8973B Specifications

General

Brand	Keysight
Model	N8973B
Category	Measuring Instruments
Language	English