Alexa, Stefan,

To verify that the Green QPDs on TMSX all have comparable segment gains, we steered the beam on all 8 segments. The whitening gain was set to 30dB.

QPDB:
Seg 1  14060 cts
Seg 2  14000 cts
Seg 3  13900 cts
Seg 4  14300 cts

QPDA:
Seg 1  15900 cts
Seg 2  17500 cts
Seg 3  17100 cts
Seg 4  16200 cts

QPD A was somewhat more difficult - depending on the QPD B pointing, the beam can clip before reaching the peak value on QPDA.

The gains are withing 10% of each other.