J. Kissel, E. Merilh
I had Ed export his test results for one channel for this chassis from directly from the SR785 onto a floppy disk. I then plotted the results and compared against the model we have of this modified driver, which we use to design the compensation filters. See attached. The message -- the driver modifications for this particular channel look great. By comparing the results of the channels in the usual aLIGO CDS way (comparing the magnitude and phase values at certain frequencies against previous measurements recorded in the same way), the rest of the channels check out too.
I've stuck the raw data, and the script that's used to plot it in the suspensions SVN repo,
/ligo/svncommon/SusSVN/sus/trunk/electronicstesting/coildrvtf/lho/Triple_Acq/S1000356/*.TXT,
and
/ligo/svncommon/SusSVN/sus/trunk/electronicstesting/coildrvtf/lho/Triple_Acq/S1000356/plot_S1000356_tfs.m
As a part of the standard aLIGO procedure, I've also
- updated the e-traveler, indicating that is has been modified, and then subsequently installed as H1 SUS SRM M3.
- attached the same .pdf I attach here to the corresponding DCC document, S1000356 (now at v5). (If not this, then at least the new test report should be attached.)
- updated the DCC filecard for the H1-SUS-C7 rack, S1301874, to replace S1100025 with S1000356.
This now completes all hardware modifications needed for ECR E1400369, Integration Issue 936, and work permit 4850.