Stefan, Dan

We have edited the common OMC model to enable the READOUT path that performs dynamic normalization as a function of DARM offset and input power.  The changes have been committed to the SVN.  The goal here is to allow changes to input power and DARM offset after we have switched to DC readout, so the power ramp-up and experiments to the DARM offset can be performed after we handoff to the OMC.

Essentially everything in the OMC-READOUT block has been modified, although the overall calculations still match those in T0900023 (except for corrections for the math errors found therein).  The changes are:

• All channels have been replaced with cdsfilt modules to enable ramping on the offsets.
• The switch between the simple scaling and the fringe scaling path has been removed.  We didn't like the hard switch -- our preferred replacement would be a ramping matrix of the sort found in the LSC model, but a change of this magnitude was a little intimidating, so we settled for two filter banks whose output is summed.  Now, to switch from one path to the other, we will ramp the gain on the filter modules for a smooth transition.  This isn't something we necessarily expect to do, but the option is there.
• Upper and lower hard-coded saturation limits were changed to be either very big or very small, so we don't wind up hitting our heads/toes on these hidden gotchas.

A screengrab of the new model block is attached.

We also edited h1omc.mdl to enable the power normalization inputs.  There are two power-related inputs to the linked omc.mdl library from h1omc.mdl, "TRX_IN" and "TRY_IN".  These inputs were grounded.  Instead of using the normalized arm powers (which is what we think was intended), we have routed the requested PSL power (PSL-POWER_SCALE, although this is called LSC-OMC_POWER_REQUEST in the top level of the model) to both inputs.  This channel was already available in the model, the arm powers weren't, we didn't want to add any IPC sender/receiver pairs today.

Models were rebuilt, restarted, and the DAQ was restarted as described by Dave.

One thing we forgot to add are some additional epics readbacks in between terms of the calculation, as sanity checks that everything is acting as we expect.  We'll edit the model later.