Today I tried to see if the DARM cavity pole would change with SRC alignment offsets.  It seems as though no, it doesn't really by more than a few Hz.  I also looked to see if the cavity pole was affected by SRCL offsets, as Livingston is, and it is repeatable that I can change the SRCL offset and increase the cavity pole.  However, both times I tried this, when I got to an offset of about 250, the IFO would suddenly drop lock.  I'm not yet sure why it's dropping lock so suddenly. 

In the first attachment, SRC_ASC_OFFSETS, I plot the input offsets for the SRC ASC loops, the calibration kappa_c and cavity pole, as well as the range and POP 18 and 90.  I first had changed the SRC2 (AS_C) offsets, but that seemed to have no real effect.  I left both pitch and yaw at 0.4 for the rest of this test, but I don't think that mattered.  I saw that SRC1_Y mattered a lot, but the best value seemed to be the one Dan found yesterday while doing SR3 heater tests.  SRC1_P doesn't seem to matter as much.  I pretty much immediately started looking at SRCL offsets after this, so I don't have any 'settling time' for the cavity pole after the end of this plotted time.

In the second and third attachments, I show some time of increasing the SRCL offset, which increases the cavity pole by several Hz.  Note that the absolute value of the reported cavity pole is different between these locks, since we were trying to implement some calibration parameters to make these more reliable (alog 47583).

Other locking notes:

Last lock, we got to NomLowNoise, but after 4 min we dropped lock.  Looking at the lockloss, I'm not sure why.  This current lock I have the SRC1 offsets turned on (they weren't on last lock).