IRIG-B in LabVIEW and Diadem

[BenGriffiths]

I have been trying to find IRIG-B help but without sucess so here goes.

I have a PXI which records analogues signals using the standard DAQ-mx Vi's. (I think the sampling is set to continous, with a rate of 100ks/s). I have about 15 AI channels (not important), but one of the AI channels contains a amplitude modulated IRIG-B signal from a satallite decoder and I am trying to synchronise the timebases with this.

The recording DAQmx function as far as I can tell uses the internal timebase of the computer and is saved to a TDMS file.

I review and display the AI signals in Diadem however I am struggling to utilise the IRIG-B timecode (rather than the DAQmx timestamp). Ideally I would like to correct/synchronise the timebase of DAQmx with the IRIG-B signals before they are saved, but if I could also back convert the timebase from old TDMS files to utilise the IRIG-B times (saved as a analogue signal) that would also be useful!.

Any advice is welcome,

Ben

[ametcalf_css]

Hello Ben,

This seems to be quite a complicated issue (I had to do a little bit of research to find out what IRIG-B is). Just in case anyone else stumbles across this and is interested, here is a document which describes IRIG-B (along with other IRIG protocols):

http://www.cyber-sciences.com/documents/TN-102_IRIG-B.pdf

Have you seen this document here which describes synchronising your aquisition with IRIG-B?

http://www.ni.com/tutorial/4202/en

Best wishes,

Adam Metcalf