# How to detect activation time for cells?

Hello; i would like to calculate APD for a cell, i was wondering if some one can help;  I checked in the script of the  example  APD restitution i was just able to see that running the experiment the APD was calculated  and the activation time was shown i but how you did it i do not undestand; I use the opencarp's parameter LATS but  it seems like it just   work  for tissue , when i use it in bench it did not reconize it ;please can you help me!