[Cao, Ellie, Dave O, Aidan]

To whoever will be around in the control room last after commisioning, here are the steps for SR3 scanning to align Y arm HWS:

1- Turn off SR3 Cage Servo , Make sure that all mirrors are in ALIGNED state.

2- Run arbitrary waveform generator for H1:  SUS-SR3_M1_OPTICALIGN_P_EXC.

             Frequency has been set to 41.7 mHz

            Amplitude has been set to 750 urad

3- Run arbitrary waveform generator for H1:  SUS-SR3_M1_OPTICALIGN_Y_EXC immediately after step 2

            Frequency has been set to 10.3 mHz

            Amplitude has been set to 1550 urad

Let it run over night

All relevant windows have been left open on computer operator1 10.20.0.81