synchronsation daq 6251 with PCIe 1429

[chagalah]

hi,

i am using a 6251 usb to generate analog signal, those signals generat a phenomenon recorded by a camera using a PCIe 1429.

I wish to trigg the camera  on the analog signal so the image would be recorder always at the same moment.

i wish on know how could do this.

thanks.

amine