AO Sample Clock PFI5 on PXI_6723

[clint100]

Is there any example code on generating a pulse train on PFI5 of a 6723 in Labview 2009??  I couldn't find any.

Thanks

[margasan]

Hello Clint,

If it is possible to route the signal ( counter output) to the PFI line 5 should be done using any of the methods listed in the link below:

Internally Routing Counter Signals in LabVIEW

However the 6723 routing table shows that there is no direct on indirect route between the counter´s output and PFI 5, you may try it.

Regards

Mart G

[clint100]

So why is it labeled PFI5/AO SAMP CLOCK??  What exactly does that mean??

See attached.

[Brad_K]

Hi clint100,

The NI 6723 is based on the DAQ-STC ASIC, which can input most timing/triggering signals from any PFI terminal, but can only output specific signals to specific PFI terminals. For example, PFI5 can be used as an input for the counter source, counter gate, AO start trigger, AO sample clock, etc. The only signal that can be output to PFI5/AO SAMP CLOCK is the AO sample clock (i.e. the DAC update signal for hardware timed generations).

Brad

[GretchenSkellyZimmer]

Brad,

I have a follow up question.

On page 3-9 of DAQ AO Series User Maunual, 'You can configure the PFI 5/AP SampClk pin to output the ao/SampleClock signal (the default is configured as input).  How do I 'configure' the PFI 5 to be output?

Gretchen

[Shane-C]

Brad,

If you continue to read your manual further, chapter 6 discusses what the PFI lines can be used for.  These lines are used for timing signals. Take a look at the example code in the following link.  Does this help?

https://decibel.ni.com/content/docs/DOC-9061

Regards,

Shane C

[GretchenSkellyZimmer]

Hello Shane, thanks for your response.    BTW, I tagged onto this discussion thread, but I actually have PCI, not PXI  - but I am working with a 6723 board.

Can I just do it this way?

or with Connect / Disconnect Terminals

Gretchen   (not Brad)  

[Shane-C]

Hello,

Yes, your method should also work.  You've exported the sample clock for whatever task you have wired in out to PFI5 in this case.  Assuming this is the behavior you are looking for, this should work fine.  The other code I included as an attachment was for use with counter outputs, just for an example.

Regards,

Shane C