Keysight Technologies X Series Service Manual page 271

Analog/Digital IF Troubleshooting
25 MHz BW IF Section
4. The analyzer marker should read 300 MHz at 10 dBm ± 3 dBm as shown in
Figure 7-7.
Figure 7-7 300 MHz L.O.
If the 300 MHz signal is not measuring the correct power level, see the A16
Reference Assembly troubleshooting section in this service guide. If the
300 MHz L.O. is measuring the correct power level and frequency and the
22.5 MHz signal is low, the most probable cause is the A2 Analog I.F. assembly.
Keysight N9010A EXA Service Guide 271