Why is Start Trigger Delay not applicable?

[stilly32]

Hi Ams,

Unfortunately there isn't aa supported way to add the additional delays between the trigger and the first pulse. Depending on the rate at which you are retriggering, there might be a work around by stopping and clearing the task and starting it again, but this defeats the whole purpose of retriggerable output and would introduce new issues. If software timing was acceptable,  you could (if using an M series card) use DAQmx events to start code that delayed and then generated a pulse train, but again this probably wouldn't be a good option and would introduce much more programming. The only other way I can think of is to introduce a delay into the trigger pulse - either by using another board or hardware. Usually triggers are used to sync I/O or start acquisition at an exact time, so a delay like this is not used.

Hope this helps,

Andrew S.

National Instruments

[Ams]

Hello,

Is there any way I could use Signal express to trigger the kind of signal that has been discussed.

Ams

[stilly32]

Hi Ams,

Signal Express still relies on the DAQmx driver, so unfortunately you're going to run into the same issues. The HS-DIO cards support scripting where you can set it up as retriggerable and specify the desired digital waveform, but the M Series cards don't have those capabilities.

Andrew S.

National Instruments