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[[Image:HPD_OnePEdist.png|thumb|300px|Distributions of primary and secondary photoelectron signals (noise included) for one incident primary photoelectron.]]
[[Image:HPD_OnePEdist.png|thumb|300px|Distributions of primary and secondary photoelectron signals (noise included) for one incident primary photoelectron.]]
Fixed parameters from HPD specifications and no-light distribution ("pedestal") measurement:
* Total gain, including amplifier and oscilloscope waveform mean rescaling: 1.9264 × 10<sup>5</sup> V/p.e.;
* Pedestal position: -3.6606 × 10<sup>-3</sup> V;
{| style="text-align:center" border="1" cellspacing="0" cellpadding="5"
|-
! colspan="2"| Gaussian 1
! colspan="2"| Gaussian 2
|-
| p || 107.3 || r || 115.2
|-
| α || .000815 || β ||.000524
|-
| σ<sub>2</sub> || 35.01 || σ<sub>3</sub> || 132.9
|-
|}