We're exploring some effects which may give some funny macroscopic detuning and cause a near phase degeneracy in the REFL RF signals (see radar plot from Jenne below).
1) Alignment: we centered the oplevs to reduce fluctuations and then tweaked the BS and PRM alignment to build up the power. No significant change in the RF phases of the DOFs.
2) Measuring RAM: we set the dark offsets (by hand since the Masayuki script doesn't really work well anymore) to with 1 counts. We then locked the MC, misaligned the ITMs, and looked at the REFLOUT16 channels using the following command line:
z avg 12 C1:LSC-REFL11_I_OUT16 C1:LSC-REFL11_Q_OUT16 C1:LSC-REFL33_I_OUT16 C1:LSC-REFL33_Q_OUT16 C1:LSC-REFL55_I_OUT16 C1:LSC-REFL55_Q_OUT16 C1:LSC-REFL165_I_OUT16 C1:LSC-REFL165_Q_OUT16
So these offsets are small in counts. In meters this corresponds to....less than 3 pm for any of the I signals.
Refl11I = 2.06e-12 meters
Refl11Q = 2.94e-10 meters
Refl33I = 5.28e-13 meters
Refl33Q = 1.07e-11 meters
Refl55I = 2.71e-12 meters
Refl55Q = 3.55e-11 meters
Refl165I = 3.07e-13 meters
Refl165Q = 8.63e-14 meters
3) Next we want to put large offsets into the error points of the loops
4) Change modulation depth
5) Check IMC length (todo for Q/Manasa for Tuesday - Wednesday)