deletions | additions       diff --git a/background-estimation.tex b/background-estimation.tex  index faa6dae..99a99cf 100644  --- a/background-estimation.tex  +++ b/background-estimation.tex 
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The first step of smFRET analysis involves estimating the background level.   For example, to compute the background every 30s, using a minimal timestamp   delay threshold of 2 ms 2~ms  for all the photon streams we execute: one executes:  \begin{verbatim}  d.calc_bg(bg.exp_fit, time_s=30, tail_min_us=2000)