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where pedestals and <gain-factor> are per-pixel map combined from 7 gain mode maps.
Calibration
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procedure
Accumulate dark data and evaluate pedestal for five gain modes:
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| Switching gain mode | AHL-H | AHL-L | AML-M | AML-L |
|---|---|---|---|---|
| pedestal H(M)-from dark, L-evaluated | 3332 | 1825 | 3295 | 2601 |
| offset (B) from fit | 4584 | 3077 | 3679 | 2985 |
| offset (B) difference H(M)-L | 1507 | 694 | ||
| gain (G) from fit | 47 | 0.52 | 15.4 | 0.49 |
Current version of pedestals evaluation
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Questions
- do we need to account for the difference between offset (B) and pedestal (Gabriel's version)
- the same difference may be between fit B(L) and pedestal(L) or OR it is smaller due to the gain?
- is current procedure correct?
- if not
- what is correct procedure?
- or what could we calibrate with charge injection?
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