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4227 triggering a single pulse with EXT on pulse-width mode

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4227 triggering a single pulse with EXT on pulse-width mode

Postby cpc333 » Tue Mar 12, 2013 10:36 pm

Hello,

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: 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.

Any help? Thanks 8)
Attachments
picoVersion.PNG
pulseData.psdata
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Re: 4227 triggering a single pulse with EXT on pulse-width m

Postby ziko » Fri Mar 15, 2013 11:24 am

Interesting, I cannot recreate the problem, does this happen all the time or did it happen just the once?
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Re: 4227 triggering a single pulse with EXT on pulse-width m

Postby ziko » Fri Mar 15, 2013 1:46 pm

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?
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Re: 4227 triggering a single pulse with EXT on pulse-width m

Postby cpc333 » Fri Mar 15, 2013 8:46 pm

Yes, it was definitely repeatable. I'll look at it again today and see if I can provide any more hints.
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Re: 4227 triggering a single pulse with EXT on pulse-width m

Postby cpc333 » Tue Mar 19, 2013 2:33 pm

I've decided I can manage with just a normal rising trigger. But it would be a nice feature for this advanced trigger to work with EXT . Thanks!
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Re: 4227 triggering a single pulse with EXT on pulse-width m

Postby ziko » Tue Mar 19, 2013 2:42 pm

Yeah it seems to be a bug, I have reported it to our software engineers.
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Re: 4227 triggering a single pulse with EXT on pulse-width m

Postby cpc333 » Thu Mar 21, 2013 12:07 am

Great, thanks! Good luck fixing it!
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