07-17-2006 11:13 AM
07-18-2006 06:23 AM
Hi there Pete,
Thanks for posting on the NI forums.
There are a few things that may be experiemented with to eliminate/reduce this kind of noise. I noted you are using an RSE terminal configuration. If the signal source is grounded then it is possible to induce a ground loop current between your device and the signal source. This can introduce error in your measurements.
There has also been a forum thread (link below) on a similar issue, albeit for an E-Series device. The thread documents some steps to try, one of which I would suggest looking into would be increasing the interchannel delay (Convert clock) setting. This will allow the ADC and ASIC more time to settle, but also allow any external capacitances to discharge slightly.
I am surprised you are seeing inter-channel crosstalk with your DAQ device at the given sampling rate as the device can sample at rates much greater than this. I would suggest taking a look at the ground loop link noted above to see if this may have an implact on your issue.
I hope this helps. Let me know how you get along. Thanks,
07-18-2006 06:33 AM
Further to the above, please take a look at the below link. It contains a decription of the convert clock property, and a snippet of example code.
07-21-2006 05:52 AM