Keysight N8976B

236 Keysight NFA Series Noise Figure Analyzers Service Guide
Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Verifying Input Attenuator A, Input Attenuator B, Low Band Switch
Logic and Power Supplies
1. Turn off the instrument.
2. Disconnect ribbon cables from A15J700 and A15J800 as shown Figure
6-3.
Figure 6-3 Ribbon Cables at A15J700 and A15J800