Table 2.
Statistics of PTC fits.
 |
 |
Gain | a00 | RO noise | |
|---|---|---|---|---|---|
| Value | 1.23 | 4.04 | 0.713 | −2.377 × 10−6 | 4.54 |
| Scatter | 0.10 | 0.27 | 0.020 | 0.032 × 10−6 | 0.43 |
Notes. The χ2 refer to the contribution of the variance terms, although the fit actually involves variances and covariances. The scatter is evaluated over the 16 video channels. The column 
refers to the model of Eq. (20), while 
refers to a parabolic model. The scatter of the gains essentially reflects different gains of the two integrated circuits hosting the pre-amplifiers. The observed spread of a00 across amplifiers is several times larger than expected from shot noise.
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