Test and Measurement Forum

Trigger hold-off

Forum for discussing PicoScope version 6 (non-automotive version)

Trigger hold-off

Postby erspearson » Thu Sep 06, 2012 2:17 pm

Most of the analogue scopes I've used over the years have had a trigger hold-off control that sets the minimum time before a trace can be re-triggered. I found it often useful and quite intuitive to use, especially in conjunction with the trigger delay control. Example: capturing part of a complex signal that repeats but has a dead time between the repeats - like a composite analogue video signal, say.

I can't find a similar control in PicoScope. Am I missing something? I'd expect it to be sitting right next to the trigger delay control.

Edward
ersp-design, London
smart thinking for smart buildings
erspearson
Newbie
 
Posts: 0
Joined: Thu Sep 06, 2012 2:06 pm
Location: London

Re: Trigger hold-off

Postby ziko » Fri Sep 07, 2012 9:57 am

Hi Edward,

We do not have a trigger hold-off feature in our devices at the moment. Depending on your signal you might not need it, so if you set up a trigger on Repeat and choose an appropriate time base this may still work.

Could you describe your signal to me in more detail and what you are looking for in your triggering.

Regards
Ziko

Technical Specialist
ziko
Zen Master
Zen Master
 
Posts: 1705
Joined: Fri Dec 01, 2006 10:03 am
Location: St Neots

Re: Trigger hold-off

Postby erspearson » Fri Sep 07, 2012 4:51 pm

In my case it's an I2C signal that's doing a frame refresh on an OLED display. But my initial example of a composite video signal is a well known one. A PAL, interlaced, composite video signal has a frame refresh of 25Hz. That's 40ms.
My choices just using the timebase are 2ms/div (20ms) which too fast and 5ms/div (50ms) which is too slow.
erspearson
Newbie
 
Posts: 0
Joined: Thu Sep 06, 2012 2:06 pm
Location: London

Re: Trigger hold-off

Postby ziko » Mon Sep 10, 2012 10:27 am

Hi,

Yes I understand what you are saying, there is an alternative, it depends on which scope you have though.

Instead of actually capturing multiple waveforms you can capture one long capture in streaming or block mode (depends on the device you have).

What device do you have?
Ziko

Technical Specialist
ziko
Zen Master
Zen Master
 
Posts: 1705
Joined: Fri Dec 01, 2006 10:03 am
Location: St Neots

Re: Trigger hold-off

Postby erspearson » Tue Sep 18, 2012 2:42 pm

It's a 2203.
erspearson
Newbie
 
Posts: 0
Joined: Thu Sep 06, 2012 2:06 pm
Location: London

Re: Trigger hold-off

Postby ziko » Fri Oct 05, 2012 9:35 am

Yeah unfortunately with this product you will not be able to do what you want. The alternative is a large memory device and just capture a big block of data, however the price does start to go up.

Regards
Ziko

Technical Specialist
ziko
Zen Master
Zen Master
 
Posts: 1705
Joined: Fri Dec 01, 2006 10:03 am
Location: St Neots

Re: Trigger hold-off

Postby JSGordon » Wed Jan 16, 2013 8:24 pm

I would like to add my support for the addition of a trigger holdoff feature. So far it is the only thing I miss on the Pico 2208 compared to a bench DSO.
JSGordon
Newbie
 
Posts: 0
Joined: Wed Jan 16, 2013 8:19 pm


Return to PicoScope 6 for Windows

Who is online

Users browsing this forum: No registered users and 0 guests