The light level on the first loop power stabilisation photodiodes was adjusted to
give ~9.6V on PDA and ~10.2V on PDB.  Other than (mis)aligning each photodiode there
is no way to adjust the output of each separately as the half waveplate is common
in both paths.

We tried engaging the power stabilisation servo without success.

The DC output voltage of the photodiodes reported on the MEDM screen are different from
those measured by a voltmeter.  Even though these DC values are calculated from the AC
output, once the value exceeds ~7V the discrepancy becomes quite large with 10V as
measured with a voltmeter being reported as ~6V on the MEDM screen.




Jason, Peter