acquire signals from different channels with different sampling rate at the same time

[UniSA]

Is it possible to acquire signals from different channels with different sampling rate at the same time? The DAQ device I have is PCI6221 (M Series). Is there any example code available?

Help!

[jdunham]

Most NI DAQ boards have only one subsystem for timing analog inputs.  So you can't use separate clocks on separate channels.  You should sample all of your channels at the fastest rate, and throw away the data you don't need.

[devchander]

Additionally,

Although it is not possible with hardware timed acquisition.

You can do something like this by using software timing and acquire different channels at different rates

Look at attached vi

[UniSA]

Sorry, can you change it to a lower version? I only have LabVIEW 7.1

[devchander]

In LabVIEW 7.1

Message Edited by devchander on 09-07-2007 04:15 AM

[tbob]

If you really need different sample rates, the best solution is to use two DAQ boards.  Then you can set the sample rate differently for each board.