data aquisition of a NI 9234

[lmn2k]

Does any body know how the acquisitioning of the A to D's occur on a NI9234? Are all 4 channels logged sequentially or simultaneously? What is the time that it takes for the A to D to do the acquisitioning or a channel? Any help would be greatly appreciated! 

[AdnanZ]

It's simultaneous.

Valid Sampling Rate = (Master Timebase) / (256*n), where n is an integer from 1 to 31

The NI 9234 has a 13.1072 MHz Timebase, giving a maximum sampling frequency ( n = 1) of 51.2 kS/s.

The 9234 can either use its native sampling rates or it can synchronize to one of the other modules. So if you synchronize a 9237 and a 9234 together, you can either set the 9234 as the master and get 51.2 kS/s for both modules (or 25.6 kS/s or other divisors), OR you can set the 9237 as the master and get 50.0 kS/s for both modules (or 25 kS/s, etc.).

NI 9234 Operating Instructions and Specifications