ACD Trending from AcdHoldDelay runs

The AcdHoldDelay script pulses the charge injection strobe in increasing values of hold_delay (number of counts before the shaper signal is latched) and mesures the pha values.
This script tries to measure the peak of the output curve.
We can only set the hold delay on a garc basis. So we have to try and get the value that best suits all 18 channels in a garc.
For each garc we keep track of the following values.

• Mean: the mean value of all the shaper peaking times on a GARC. In clock ticks.
• RMS: the mean value of all the shaper peaking times on a GARC. In clock ticks.

The test points here are the "CPT" tests list in the full list of ACD test phases

Comments:

• The discrete shift between phases 15 and 16 is a result of changing trg_seq=0x50 to trg_seq=0x59
  trg_seq controls the delay between the tci pulse and the start of the readout
  

Plot of values	Comments	Plot of diff W.R.T. reference
	Hold Delay set points Value depends on timing parameters Should be 26 for current settings
	RMS of Hold Delay set points Range: 0 - 4