Keysight Technologies X Series Service Manual page 182

RF Section Troubleshooting (RF/Microwave Analyzers)
Troubleshooting
3. Front End Control Assembly Verification
If the Front End Control Assembly logic was verified in the 'Low Band Quick
IMPORTANT
Check' section above, skip to "Input Attenuator A Power Level Verification
(Option FSA only)" step below.
Verifying the Front End Control Assembly requires the RF Front End
Troubleshooting board E4410-60115 or kit number N9020-60005. The kit
includes the troubleshooting board and associated interconnect cables. The
troubleshooting board and cables will help verify the control logic from this
assembly to Input Attenuator A, Input Attenuator B, Low Band Switch, YTF
Preselector, (Optional) Low Band Preamplifier, (Optional) High Band
Preamplifier, (Optional) Electronic Attenuator and the RF Front End Assembly.
The control logic should be verified going to each assembly while the Front End
Troubleshooting board is connected.
— Turn off the instrument.
— Connect the E4410-60115 Front End Troubleshooting board to the A15
Front End Control Assembly as shown in Figure 4-27 and Figure 4-28.
182 Keysight N9010A EXA Service Guide