Digital synchro recording signal using PFI0/PFI1

Hello

I try to sync data between an instrument NOR cDAQ-9188XT acquisition and a 3rd party.

The instrument of 3rd party kicks out a digital synchronization signal which consists of a short pulse whenever it samples followed by a series of pulses coding a 32-bit integer (see image - signal synchronization for 3 bags). This integer is the serial number recorded with each packet of data. Samples of instrument to a pace of 2 kHz, so the pulse + whole occurs every 0.5 ms and by my rough calculation, each bit of the integer lasts 5 µs.

The cDAQ-9188XT will record a series of analog channels by using LabVIEW, and I wish to record this signal to synchronize with the analog channels, so I can sync the two sets of data in post processing. There is no spare slots in the cDAQ so I can't use a digital I/o module and I believe that the frequency of sampling of my analog channels will be too weak to pick up the signal from sync.

The cDAQ-9188XT has two BNC connectors on the frame that correspond to lines PFI0/PFI1, I would like to know if it is possible to use a PFI line to record this signal of sync?

See you soon.

Pat.

Think about it once again, if you're happy with the post-processing of the data, then you can get in with the straightforward acquisition code (maybe start with an example of the semi buffering period ).  This will give you a picture of the down time of the signal that then you need to decode in the 32-bit number.

Best regards

Tags: NI Hardware

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