Ash,
It sounds like we may need to look at your SA124B. If you have the equipment, generate a CW signal at 25 MHz, 1 Ghz, 3 GHz, 6 GHz, and 10 GHz, around -10 dBm with a 0 dBm reference level and 100 kHz span. If any of them read more than a few dB off, we will need to repair your SA124B. Email support @ shnavloginupdates250428.kinsta.cloud for details.