Synchronized measurements (GPS)

[YoungResearcher]

Dear all, 

I am desperately attempting to establish synchronized measurements. I have two cRIO devices (9038 and 9068) with two GPS modules. I connected a signal generator to both of the devices just to check if acquired data aligned or not. I failed.

The sampling rate is 5000kS/s and I am getting 1000 samples times 6 channels per each read. Obtaining initial time stamp and passing it to the consumer loop, where further I calculate an array of timestamps for 1000 samples. The thing is that initial time stamp doesn't show any fractional seconds, the number is always rounded. And also I believe that the whole algorithm is incorrect. The goal is to measure to different points at the power system at the same time (50 Hz).  I would appreciate any advice.

Thanks. 

[LeahE]

Hi there,

Would the module by any chance be an NI-9467? If you go to 'help>find examples' in LabVIEW then search NI 9467, there are a couple of examples that should point you in the right direction.

Also, see http://digital.ni.com/public.nsf/allkb/c08f37c64d0ffcbc862580b400601903 How Do I Use the FPGA Timekeeper to Synchronize Data with the NI 9467 GPS Module?

 and http://search.ni.com/nisearch/app/main/p/ap/tech/lang/en/pg/1/ps/30/sn/ssnav:sup/aq/or(%22NI-9467%22... Support resources for NI-9467

Let us know if this helps!

Best regards,

Leah E