I did change the ETMY optical lever configuration: http://131.215.115.52:8080/40m/4795

And I left it in that state per Jamie's request.

 

I was going to work on the servo tuning but found that the whitening was not working at that time.

What I was going to do is to measure the open loop gain to make sure the servo is stable, then 

measure the noise and minimize the rms motion by tuning the gain and the filter transfer function.

 

I plan to come to the 40m lab on August 22 for two weeks.

 

Valera.