This post is related to a previous one, where I managed to get pulse-width mode working with EXT but I was using a 10kHz square wave as the trigger signal: http://www.picotech.com/support/topic11977.html
Now I'd like to trigger off of a single ~40us long pulse. It works fine with channel A or B as the trigger input but when trying to use EXT, weird things happen. I've attached a psdata file showing the scope set to trigger only for pulses less than 10us on EXT. However, the scope triggers for a 100us long pulse as shown (pulse generator output connected with a T to channel A and EXT). Not sure what the EXT input is doing to mess this up.
We have actually managed to recreate it, the questions still stands though is the problem repeatable and are there steps you can give as to how you get this?