Channel analyzer: channel scope trigger

[keukenrol]

Hi

I am trying to get the triggers working in the channel scope, but it does not seem to function as expected. I have set trace length to a minimum to detect a single pulse. With a sample rate of 20MSPS, this gives me a trace length of 240 microseconds. I would like to use the one shot trigger. The level is known, thus it is set using the Trig0 trigger level slider. Tried both real, imaginary and magnitude variants. While the signal does show up in freerunning mode, it never seems to actually trigger.

Am I missing something?

Thanks!