[Koji, Jenne, Manasa, Annalisa, Rana, Nic]
PRMI locked using 3f signals and Y arm brought to resonance using ALS 
<<Procedure>>
Preparation:
- After we checked the functionarity of the Yarm ALS, both arms were locked with the IR, and aligned by ASS.
- Disengaged the LSC feedback. Approximately aligned the PRM.
- Recorded the current alignment biases. Turned off all of the oplevs.
- Went into the lab, aligned all of the oplevs on the QPDs (except for the SRM).
- Check the locking of the PRMI.
- Once it is locked, go into the lab again and align the POP QPD.
- Check everything of the PRMI LSC/ASC works.
- Misalign PRM by 0.2
- Lock the arm again. Run ASS again.
- Miaslign ETMX.
ALS:
- Lock the Xarm with green. Adjust the beat freq between 30-50MHz.
- Reset Phase Tracker history.
- Check if there is any offset for the ALS. If there is, adjust it to zero.
- Stabilize the arm with the ALS. We should check the sign of the servo before it is cranked up to the nominal.
- Confirm if the offset FM has LPF (30mHz LPF).
- Run excastep for the ALS offset until we find the TEM00 resonance of the IR
- Record the offset at the resonance.
- Step back by 5 count (=100kHz)
PRMI+ALS:
- Started from the offset of -5.
- Aligned the PRM and the PRMI was locked by REFL165I(x0.8)nadQ(x0.2).
- PRM ASC engaged
- Moved the offset to -4 by ezcastep C1:ALS-OFFSETTER2_OFFSET +0.01,100 -s 0.1
- Moved to -3, -2, -1.5, -1. During the sweep PRCL/MICH gain was tweaked so that the gain is reduced.
Nominal locking gain was PRCL x+2.5/MICH -30 . During the sweep they were +2.2 / -12
PRCL FM2/4/5 ON, Later FM3/6 turned on and no problem.
- Moved to -0.9, .... , and finally to 0.
NEXT STEP
- Automation of the PRMI+one arm
- PRMI locking with BS/PRM
- Better sensing matrix
- PRMI+two arms
- Use of the DC signals form the transmission monitors. (High power /low power transmon).
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