442 Keysight NFA Series Noise Figure Analyzers Service Guide
Assembly Replacement Procedures
Analog I.F. (AIF)/Digital I.F. (DIF) Assembly
Separate AIF/DIF Assembly
1. To separate the AIF (1) from the DIF (2), unplug ribbon cable W2 from
the AIF assembly.
2. Refer to Figure 15-41. From underneath the assembly, remove the three
screws (3).
Figure 15-41 AIF/DIF Separation
AIF/DIF Pre-installation
1. Set the DIF in position over the AIF. Reinstall the three screws removed
before. Torque to 9 inch-pounds, starting with the middle screw.
2. To reconnect the AIF and the DIF, reconnect the ribbon cable W2.
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