What is the maximum sampling rate for a PXI - 6255 with all 80 RSE channels acquiring data?

[ShaneBoone]

From the specs, it appears as if it should be 750 kS/80 which would yeild 9375 Hz, but I'm sampling 60 channels (which using the same logic would imply a 12.5 kHz max sampling rate, and I'm able to get away with about 25 kHz.  Also, does anyone know of a way to sample individual channels at multiple rates.  I don't think this is possible for this specific hardware, but if it is, it would be helpful.

Thanks!

[Jonathan_S1]

Hi,

DAQmx will let you set these higher values, but you are no longer within spec of the card so the measurements are not reliable.

If you start sampling higher, you will see error "200011", which indicates that you are violating the settling time.  If you sample even higher, you will see error "200012", which indicates that the ADC conversion can no longer keep up. 

In summary, although you are exceeding your calculated rate, your measurements lose their reliability.

Jon