Sheila, Jeff K, Hugh, Jamie, Sheila

We did some investigating of why the signs were flipped on the AS centering loops, which was made more difficult by some SDF confusion.

Sign flip

The reason why the sign was flipped for the AS centering loops was explained in 40853, Jeff corrected an error in the sign convention for the tip tilts.  This means that the signs will also be wrong for the refl centering loops and the OMC ASC loop that feedsback to OM3.  This probably also explains part of the difficulties that T Vo had in closing the OMC ASC loops. 

I've flipped the sign of all REFL and AS centering loops, and flipped the sign of the OM3 actuation for the OMC ASC by changing the sign in the output matrix (DOF2TT).  I accepted these in SAFE.snap and observe.snap

SDF confusion

Last night when Terry and I realized that we could only close the AS centering loops by flipping the sign, we looked at the SDF file for the OMs (which are on the SUSOMC model).  We saw that in the observe file (which is the same as the safe file) all the outputs were turned off, which doesn't make sense.  This led to not trusting SDF.  Jeff went back through the autoburt snapshots and realized that some wrong settings were stored in SDF when the OMs were moved to the OMC model (38827).  

Currently when new channels are added to a model, they are not monitored in SDF.  It would be better if the default were to monitor new channels.