[Aso, Ushiba]

Abstract:

We tested PR3 ASC with OBSERVATION state.
Lock can be locked with ASC but alignment seems not good.

Detail:

<PR2 BPC with OBSERVATION state>

Since PRCL filter at OBSERVATION state is different from the one at PRFPMI_RF_LOCKED state, we changed the oscillator frequency and amplitude to fit the OBSERVATION state.
New parameters are as follows:
PR2 PIT:  frequency: 50.1 Hz, CLKGAIN: 1 cnt, DEMOD_PHASE: -134.7 degs
PR2 YAW: frequency: 45.1 Hz, CLKGAIN: 1 cnt, DEMOD_PHASE: -4.9 degs
After the above modification, BPC loop can be closed at OBSERVATION state.

<PR3 ADS with OBSERVATION state>

Since dither frequency is close to the current better sensitivity band, we changed it from 46.1 Hz to 25.1 Hz.
Then, demodulation phase was changed from -154 degs to 177 degs.
The loop can be closed and stable but this loop seems to make alignment worse at OBSERVATION state (fig1: T cursor represents the time when PR3 ADS was engaged).
So, we need further optimization for this loop.