Dynamic Acq Harware Start Trigger

Hi Everyone,

I'm using a PXIe-6556 to capture digital signal. I'd  like to start capturing signal upon receiving a hardware start trigger in PFI0.

The PXIe-6556 works fine with this method when using the onboard clock but won't start capturing when I'm using an external clock via ClkIn as a source clock.

Is this a hardware limitation for PXIe-6556?

Regards,

jeep