A13 Rf Front End Assembly (N8976B) - Keysight N8973B Service Manual

RF Section Troubleshooting (N8976B)
RF Section Description

A13 RF Front End Assembly (N8976B)

This assembly contains the major front end conversion components. The A13 is
repaired at the assembly level. Replacement A13 assemblies include the
A13A1 1st IF Bandpass Filter. See Figure 5-1.
Figure 5-1 A13 RF Front End Assembly View from Front Panel
204 Keysight NFA Series Noise Figure Analyzers Service Guide