LabVIEW: how to route time base to counter source using 6602.

[ddudge12]

How do I route the 80Mhz internal time base on a 6602 card, to the source of any counter using LabVIEW? I can only see the option for an external time base, and drop down from source only allows me to select source pins or RTSI lines? I am using the DAQ Assistant!!

Message Edited by ddudge12 on 06-08-2005 09:37 AM

[Kevin_Price]

ddudge12,

I haven't ever really used DAQ Assistant, but I *think* that the drop-down menu you mentioned is for selecting the Sampling clock, which is different than the counter Source. There doesn't appear to be a way to select a source signal in the DAQ Assistant -- it seems to expect you to wire a signal to the counter's default Source pin.

You'll need to use a DAQmx Channel property node to select the 80 MHz timebase as a source. Attached is a screenshot of a very simple example that will count up as high as a 32-bit int can go, rollover to 0 and continue counting up, etc. It'll take a little less than a minute to rollover if all is working correctly.

-Kevin P.