provide TTL pulse at start of AO

[WernerGobel]

Hello everybody,

we are using the analog output sample clock as the master clock for a number of I/O tasks running on a PXI-6259 board. In addition, we would like to start an external application with the start of this AO task.  For that  reason  we  need for example a TTL pulse at the START of the AO task. I tried to use the AOStartTrigger by routing it to a PFI pin, but that doesn't help as there is no signal at the PFI pin. 

Is there an easy way to produce such a signal?
Thanks a lot in advance for any help!

[AmirG]

Hello WernerGob...,
the PXI 6259 has also two counter channels. You could use this counter for edge counting, pulse measurement, position measurement but also for pulse generation.
Please read the following Tutorial about this issue:
Generating a Pulse Train with a Counter
http://zone.ni.com/devzone/cda/tut/p/id/2760


For additional examples, please see the LaVIEW Example library : LabVIEW>>Help>>>Find Examples>>Hardware Input/Output>>generating digital Puls
You could also find example for LabWindows/CVI under:
LabWindows/CVI>> Help>>>Find Examples>>Hardware Input/Output>>generating digital Puls .

I hope this helps!

Best regards,
AmirG

[WernerGobel]

Dear AmirG,

thank you very much for your response. As we are using the counters for other purposes, I would like to use a different type of source for the analog output start trigger (or gate if possible).  Is there any way to generate such a signal and not using the counters? What about the AOStarttrigger?

Thank you very much for any help!

[AmirG]

Hello WernerGob..,
in my opinion you should use APFIO.
Please try to use the AOStartTrigger by routing it to an APFI pin. You usually connected analog tigger signals to APFI pins.
Would you test this attachment Example from NI LabVIEW Example library? This could be helpful to solve your issue.

Please feel free to contact me if you have any questions.

Best regards,
AmirG