J. Kissel, O. Patane

After sorting the ADC readout issue (LHO:88550), the existing HAM1 HAM tip tilt suspensions (HTTS), RM1, RM2, and RM1 are now functional, damped, and aligned. They're running on the newly merged sush12 computer / IO chassis and following the drawing D0902810-v12. See analog changes in LHO:88519 and software changes in LHO:88527.

The only "interesting" thing is that these SUS used to run on a 16-bit DAC, and thus it's the first suspensions whose DACs have been upgraded that were never 18- or 20- bit DACs, as has been true of all other upgraded suspensions to-date. 
Thus there is a design choice here: for all originally 18-bit DAC suspensions, we've been putting a compensating gain in the COILOUTF banks' FM10 so tht no upstream loop that drives the suspension stage needed to account for the factor of 2^20 / 2^18 = 2^4 = 4x or 2^28 / 2^18 = 2^10 = 1024x change in gain calibration, with the filter bank named after the DAC, e.g. "20BitDAC" or "28BitDAC," respectively. For these suspensions, the "the loop won't see a difference gain" would therefore be 2^28 / 2^16 = (2^28/2^18) * (2^18/2^16) = (1024x) * (4x) = 4096x change.

For these suspensions, we could either put this factor of 4x 
   (1) In the "28BitDAC" filter bank in FM10, and have the *value* of that bank be different for these suspensions (4096x) vs. other suspensions (1024x).
   (2) Make the "28BitDAC" filter bank in FM10 the same (the factor of 1024x), and compensate the loops further upstream.

Today, we chose (2).

That leaves four places to compensate:
    (a) DAMP the local damping loops
    (b) TEST the test banks from which we usually drive the "health check" transfer functions.
    (c) OPTICALIGN the banks from which we drive alignment offsets
    (d) LOCK the filter banks that receive and alter the ASC centering loops as necessary.

We've chosen to install the factor of 4x within the gain_{L,P,Y} FM4 filters for (a) [see filter file changes]. For all other banks, I've installed the factor of 4x directly in the EPICs gain field [see SDF file changes].

That means all existing SUS in HAM1 are fully functional on the newly merged sush12 computer / IO chassis and following the drawing D0902810-v12. See analog changes in LHO:88519 and software changes in LHO:88527.