Hi A,
A two-edge separation measurement will require two input signals for the counter. They should be connected to
CTR 0 GATE and CTR 0 AUX (Pins 16 and 17). These pinouts and the required terminals can be found in the Device Terminals Help section of the NI-DAQmx Help or in the NI cDAQ-9172 User Guide. By default, the internal timebase is routed to the source pin so you do not have to connect an external signal. If you wanted to route another signal to the source, you can use property nodes in LabVIEW as seen below or the DAQmxSetCICtrTimebaseSrc() and DAQmxSetCICtrTimebaseRate() functions. For more information on setting these properties, you can look at
this article which sets similar properties.
Regards,
Kent
Applications Engineer
Message Edited by tnek on
05-02-2008 10:31 AM