  A comparative analysis of the method of histograms and the sequence of the
ranged am-plitudes (SRA) for statistical parametrization of the operation
regime of a single-photon avalanche photodetector is carried out. It is shown
that the SRA method contains all the information, which can be obtained using
the method of histograms, and also allows to give a quick robust description of
the dark counts of the device for a short noise sample of $\sim10^3$ points,
what open the way for the introduction of SRA approach into software of a
high-sensitivity photodetectors.
