pedestal leveling

[tomeichlersmith]

One of the tasks that is involved with overall pedestal alignment is "leveling" the pedestals so that they all are within noise (~few ADC) of their median.

Chelsea @rodr1001 has developed a algorithm (#162 (comment)) that is leading to decent results at UMN and so I'm going to translate into C++ so we can test it on other chips and solidify it.

Implementation

I'm going to create a new algorithm namespace to house this function and other functions like it that are higher level tasks that direct interaction with a Target, hopefully making them more portable. Another function that could fit into this namespace is the set_toa function from #177

• Baseline Run: (sign_dacb=0, dacb=0, trim_inv=0)
  • defines "target" pedestal (median over all channels within a link)
  • defines "baseline" pedestals (median within channels)
• Highend Run: (sign_dacb=0, dacb=0, trim_inv=63)
  • defines "highend" pedestals (median within channels)
• Lowend Run: (sign_dacb=1, dacb=31, trim_inv=0)
  • defines "lowend" pedestals (median within channels)

pseudo-code

for each ch in channels:
  if baseline pedestal for channel < target for link:
    set channel trim_inv to interpolated value between highend and baseline
  else
    set channel sign_dacb to 1
    set channel dacb to interpolated value between lowend and baseline