USB-6001 Ext Trig Using PFI0

[Jim1162]

Using the USB-6001 Multifunction DAQ:

Using the NIDAQmx C function, DAQmxReadAnalogF64, I get a status code error -200414 which means InvalidSmpClkSrc. I specify the Source as PFI0 in the DAQmxCfgSampClkTiming function. I have tried variations such as /Dev1/PFI0 but still get the error. Using a Null Source string and the internal sample clock, the device works normally and I get the analog data.

Can anybody let me know what is wrong?

[bstreiff · Accepted solution]

The USB-600x devices do not support external sample clocks.

On the USB-6001, PFI 0 and 1 may be used for counting digital edges or as start trigger signals for AO and AI. (See the PFI 0 and PFI 1 topic in the NI USB-6001/6002/6003 User Guide), not as an external sample clock signal.

[Jim1162]

Thanks,

I am going to upgrade to the USB-6210 so I can use PFI0 as a trigger for the sample clock.