When I requested the OBSERVATION_WITHOUT_LINES state, locked loss always happened in LOW_NOISING_SUS_FOR_PRFPMI.
I found that there are one difference in TM_LOCK_FILTERS between ETMX and ETMY, FM6 was off in ETMX and was on in ETMY.
After turned off the FM6 in K1:VIS-ETMY_TM_LOCK_L filter bank, it was fixed. (Fig.1.)
OMC RF alignment performed.
The sensitivity curve of the observation state was not good maybe the de-whitening filter of ETMX would not work well.
We need to check the BINARY I/O state (Fig.2. and FIg.3.).
-> Fixed by changing the LSC_LOCK guardian
L2703
ezca['VIS-ETMX_BIO_TM_STATEREQ'] = 3
->
ezca['VIS-ETMX_BIO_TM_HP_STATEREQ'] = 3
OLTF of DARM (Fig.4.)
