Hi Rob,

Attached are the pages from our lab notebook for the crucial tests of the
Sidecar ASIC and H2RG bare mux at LN2 temperatures.  The first few pages
describe our noise analysis of the data using the StarServer software.  It was
done at a gain code of 7 (voltage gain of x4, highest possible with StarServer,
~12.7 uV or 3.2 e- per ADU).  We analyze the noise by eyeballing the
peak-to-peak noise in one column (i.e. vertically) of a CDS frame, and ignoring
the (slight) low frequency wander, which we presume can be cured by reference
pixels.  The RMS noise should be about one fifth of the p-p noise (depends a bit
on the eyeball, but Judy and I get very similar estimates).

The next pages describe our implementation of the IDL software from Teledyne,
which uses the HxRG_main?.mcd code we got from Michael.  After determining the
typical output voltage of the array (1.6 V) and the voltage on the InPCommon
line (the reference for the output, about 1.8 V).  We set the two voltages a bit
lower (1.5 and 1.75 V) so nothing would be near zero (it's actually a double
differential S/H amplifier, I believe) and got the output in a single frame to
be near 32,000 ADU (the mid-range of the A/D converter).

The data for this run is at http://astro.pas.rochester.edu/~forrest/SidecarASIC/
The directory name gives the date and time, i.e.
/20090804120533/ 12:05:33 PM on 4 Aug. 2009
The CDS frame is in the 'Result' directory, the two files are the individual
reads (we always checked these first to verify the, correct, 'picture frame' and
the ADU level in the 'blemish', which was to be near 32,000 ADU.

We found the software gave an incorrect gain in the header for the first (2)
exposures (i.e. CDS) after a change in gain.  After we realized this, we deleted
that data.  The gain was correct for the next CDS.  The gain can be checked by
measuring the depth of the 'blemish' w.r.t. it's nearby surroundings.  We used
this method to verify the Teledyne statements on gain (recorded in lab notebook).

Bill

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