Abstract:

I modified the LSC_LOCK guardian so that swpping ETMX coil driver from high power to low power after locking PRFPMI.
Lock acquisition was successfull, so calibration with new coil driver is now proceeding.

Detail:

To swap the ETMX coild driver during lock acquisition, I modified the LOW_NOISING_ETM state of LSC_LOCK guardian as shown in fig1.
The part of self.counter == 2 and self.counter == 3 was added (and following counter was increased).
In addition, the DOWN state of LSC_LOCK guardian was modified as shown in fig2 so that lock acquisition is proceeded with high power coil driver.

After these modification, I tested lock acquisition and confirmed that IFO can reach OBSERVATION state with low power coil driver.
Since the channel of K1:VIS-ETMX_TM_MASTER_LPHP_SW_REQUEST was changed due to this modification, SDF should be accepted at OBSERVATION state.