- From: David Schleef <ds_at_schleef.org>
- Date: Mon, 11 Nov 2002 13:00:52 -0800
On Mon, Nov 11, 2002 at 03:00:05PM -0500, do_not.email_me_at_nowhere.org wrote: > Hi, > > I am looking at the feasibility of using the DAQ card listed above. > > The signal of intereset is aperiodic <100mS in duration every 5-10 Secs>. > I would like <ideally> to trigger off of the 100mS "blip" and, whith a > combination of pre&posttrigger acquire the whole blip <including onset>. > The card's FIFO <8KB> is large enough to store all of the event. Pretriggering is not supported in Comedi. The main reason is that to do it correctly requires a 3-nested-loop equivalent to the 2-nested-loop comedi_command structure. This is planned for post-1.0 Comedi. It's generally not difficult to emulate pretriggering in software, although with the overhead of an extra analog channel to measure the triggering signal. dave...
Received on 2002-11-11Z21:00:52