<html><head><style type="text/css"></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt">Dear GATE group and users,<br><br>I have a very simple, but confused question: what is the coincidence window in GATE command "gate/digitizer/Coincidences /setWindow <span style="font-weight: bold; font-style: italic;">x</span> ns? Is<span style="font-weight: bold; font-style: italic;"> x</span> equal to 2*t (sorry cannot type Greek) or t? I assume that a single event can open a time window with width t (is it right??).<br><br>Thank you very much and have good holidays.<br><br><div> </div><span style="font-weight: bold;">Hongwei</span><div><br></div></div><br> </body></html>