Configuring a PFI Line in Traditional NIDAQ

Question

Hi - I'm using traditional NIDAQ (v 7.0) with a PCI-6711 card; I'm trying
to connect an external clock signal to the analog output timebase signal
(i.e. to the UISOURCE signal, as it's called in the DAQ manual). I'm
having trouble with the following:
I'm using the PFI-7 line to bring in the external clock signal,
and in the manual (p. 4-13) it specifically says that the PFI line used
for this purpose should be configured in the level-detection mode.
What I would like to find out is how to do this configuration (specifically).
I looked at the documentation for the Select_Signal() command, but that
didn't look right, and I can't find anymore info on how to configure
PFI lines (in general) in the level-detxn mode (nor for the edge-detxn
mode, for that matter).
Any advice/comments are appreciated. Regards,
ARB

Answer 1

Thank you for contacting National Instruments.  I believe that Select_Signal is the command that you are looking for.   You will want it to look something like this:
Select_Signal(devicenumber,ND_OUT_UPDATE_CLOCK_TIMEBASE,ND_PFI_0,ND_LOW_TO_HIGH OR ND_HIGH_TO_LOW)
where devicenumber is the actual device number and the ND_LOW_TO_HIGH OR ND_HIGH_TO_LOW parameter will be one or the other.  You can read more about this by looking at the Select_Signal in the Traditional NI-DAQ help.  The Signal Name Equivalenices Table tells you that the UISource is called by the name ND_OUT_UPDATE_CLOCK_TIMEBASE.  Then, you can read into the parameters for this by clicking on the link that says:
"Parameter Discussion for E Series, I Series, 671X, 673X, NI 5411, and DSA Devices"
Then, click on the ND_OUT_UPDATE_CLOCK_TIMEBASE link in the table.  This will give you the possible parameter values for the source and sourcespec parameters.
Hope this is helpful!
Jeff P.
National Instruments Applications Engineer
Jeffrey P.
LabVIEW Product Management
National Instruments