POY is going from its demod board to the CM board, and then the slow output of that is going to the POY channel of the whitening, and then on to the ADC. So, with no AO path engaged, this is basically like regular Yarm locking.
Just to be clear, the normal POY signals are not currently present, so the restore POY script will not result in the arm locking. POY11_I is turned off, POY11_Q is the output of the CM board, which can be used to lock the arm, as we did tonight.
The POY digital demos angle went -56 -> 90, to get all of POY11_Q_IN1 to POY11_I_ERR