AI using two PCMCIA DAQ Cards

Can anyone tell me the easiest way to do analog input data acquisition
(in LabVIEW) using two PCMCIA (DAQCard-AI-16E-4) cards? There is no
RTSI bus connection between the cards... as would typically be used to
synchronize the scan/trigger.

[posted and mailed]
[email protected] (Joshua Marshall) wrote in
<[email protected]>:
>Can anyone tell me the easiest way to do analog input data acquisition
>(in LabVIEW) using two PCMCIA (DAQCard-AI-16E-4) cards? There is no
>RTSI bus connection between the cards... as would typically be used to
>synchronize the scan/trigger.
>
I'm not sure about these particular cards and whether it applies to them
(but I think it does on any E-series card at least), but an alternative
would be to use a trigger signal in one channel on each card and use this
trigger channel to start your acquisition. Have a look at the AI Read VI;
one of the inputs is CONDITIONAL RETRIEVAL. This allows the acquisition to
commence when the signal is triggered through one of yo
ur channels. Set up
two parallel processes (one for each card) and have two conditional
acquisitions. Combine the data in some fashion (depending on what you're
after).
This would be the simplest, but there are probably other more efficient
ways of doing it.
cheers, Alex.
Alexander C. Le Dain, PhD
ICON Technologies Pty Ltd
http://www.icon-tech.com.au

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