Reports until 13:45, Friday 17 May 2013
H1 ISC
kiwamu.izumi@LIGO.ORG - posted 13:45, Friday 17 May 2013 (6410)
Cornver Beckoff: VCO channels fixed

[Sheila, Kiwamu]

We found that there was a small mistake in the slow control channel linking. This was fixed in the software and committed to the SVN.

The mistake:

 The VCOs had two RF monitor channels cross-wired. "ReferenceMon" was taking the ADC signal which was for "DividerMon" and vice versa.

Correction:

In order to correct them we simply swapped the links in the twinCat system manager file, H1ECATC1.tsm. This modification was applied on three corner VCOs, namely IMC, ALS-DIFF and ALS-COMM. This change was then commited to the SVN. Also Sheila modified the link document [1] accordingly. She will be applying the same mods for the VCO at the end stations.
 

[1]  DCC LIGO-E1201049-v4