The amplifier on DIFF was not working because we had input/output backwards. I have installed another amplifier on DIFF. I have also put a new amplifier on COMM (HNL) that piggy-backs the power from the BBPD; this amplifier has slightly less gain (about +24dBm in comparison to +30dBm), so we expect about -7dBm for the beatnote.
Alexa and I found that this amplifier was not working, so we removed it.
The amplifier on DIFF was not working because we had input/output backwards. I have installed another amplifier on DIFF. I have also put a new amplifier on COMM (HNL) that piggy-backs the power from the BBPD; this amplifier has slightly less gain (about +24dBm in comparison to +30dBm), so we expect about -7dBm for the beatnote.