ACD Trending from AcdGafeNoise runs

The AcdGafeNoise script pulses the charge injection strobe with input charge, but with very small values of the veto_dac and veto_vernier settings.
We scan the veto_vernier setting to map out the noise floor in the veto line
For each channel we measure the following values. Note that the result is expressed in terms of veto_dac counts. The veto_vernier step is about 1/32 of the veto_dac step.
The test points here are the "CPT" tests list in the full list of ACD test phases


Comments:


Plot of values

Comments

Plot of diff W.R.T. reference

Noise floor of veto_dac, veto_vernier
Expressed as 64 - (veto_dac + veto_vernier/32)
Width of turn on curve (ERFC) of veto_noise
Range: 0 - 0.4
Expressed as veto_dac + veto_vernier/32
Chi2 of ERFC fit to noise data
Range: 0 - 100

Eric Charles
Last modified: Fri Oct 13 15:00:18 PDT 2006