Multifunction DAQ

cancel
Showing results for 
Search instead for 
Did you mean: 

How do I eliminate cross talk from scxi 1102c?

I'm attempting to aquire data from 3 accelerometers that give me a reading between -10 and 10 volts. I'm reading at 6000scans/sec. If I read them all by themselves I can capture there individual signals but when I try to read them at the same time I only get one signal. I've tried shorting out all of my unused channels and setting me interchannel delay to the maximum but nothing changes. What can I do to eliminate the cross talk.

thanks in advance for any help,
banj
0 Kudos
Message 1 of 2
(2,440 Views)
Cross-talk can be caused by inputs with a high source impedance. If your inputs have a source impedance over 1 Kohm, then that might be causing the cross-talk. There are documents on our website that discuss ways to decrease the source impedance to eliminate cross-talk. I've included links below to these documents. I hope this helps.

Is Your Data Inaccurate Because of Instrumentation Amplifier Settling Time
http://zone.ni.com/devzone/devzoneweb.nsf/Opendoc?openagent&F7B07C1AEFAC727B8625686500693572

Using a Unity Gain Buffer (Voltage Follower) with a DAQ Device
http://zone.ni.com/devzone/conceptd.nsf/webmain/CD57A73721E0612586256BAE0055CDD9?opendocument

Regards,

Todd D.
Applications Engineer
National Instruments
0 Kudos
Message 2 of 2
(2,440 Views)