I'm currently testing my new-ish scope with a test-jig that creates hard-to-trigger digital signals, aperiodic stuff, missing pulses and the likes.
Unfortunately quite a lot of things don't seem to work or are at least very very finicky with regards to the parameter values. Now either I'm too impatient and fail to set all necessary options or something is wrong with the DSO itself.
One trigger option is "pulse", which is supposed to trigger on pulses of known length. Sounds simple enough. The test signal I use is a pulse-train of short pulses of increasing length. Every pulse is unique in length, so no ambiguities that could confuse the thing.
Just to make sure I haven't completely lost my senses, please tell me what you think about this screenshot. Personally I think it is a bug.
In the tested range 1µs - 9µs the scope is consistently off by 2µs, in the sub-µs-range it gets worse (e.g. it triggers on a 250ns pulse when set to something completely different).
I know that this is the bottom-end of the Lecroy scopes and just a re-branded Chinese something, but I would have hoped they had done some more testing. It's pretty annoying that there will probably be no firmware fixes for this. Not enough money in it for them... only reputation. Does that still matter these days? Who knows.