I measured the amplitude and phase imbalances of the demod boards which have been modified. This is just a basic health check. We hope to use the script that Kiwamu is developing for a more accurate test. The script can also use these measurements as a sanity check. POP110 requires some further attention.
The RF distribution box outputs corresponding to the demod board (eg. AS55_LO --> AS55_demod) were used as LO sources. The RF signal was generated with a Marconi and held a kHz away from the LO frequency. The amplitude and phase unbalance were measured with SR785. The RF Power meter was used to check the LO power in each case.