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Fri Dec 6 15:22:01 2019
DAFI system revived
We did the following:
Route the fiber from the control room to 1Y2.
Plug fiber in to FiBox at either end, turned FiBoxes ON.
Tested the optical connection by driving a 1Vpp 440 Hz sine wave from a function generator - Yehonathan hears it loud and clear in the control room.
Tested that both CH1 and CH2 work - only CH1 is connected to the speakers in the control room at the moment.
There is some cross-coupling between the channels - not sure if this is happening in the multi-mode fiber or in the electroncis, but I estimate the isolation to be >30dB.
Connected CH8 and CH9 of DAC0 in the c1lsc expansion chassis to CH1 and CH2 respectively of the FiBox in 1Y2.
Restarted the c1daf model on c1lsc, came up smooth.
Routed the POY11 error signal through the various matrices in c1daf, and we could 👂 the Y-arm cavity 🔐 😎
Channels are muted for now - I'll give this a whirl while doing the PRFPMI locking.