Which of single ended referenced & non-referenced is better in cutting crosstalk

I am using a SCB100 box to go into PCI-6031E(DAQ CARD) to go into a windows 2000 pro PC. I am running 2 speakers one at 98HZ and other at 112HZ and trying to measure distortion of my acoustic sensors. I know that differential mode in SCB100 box causes no cross talk between the channels. But I want to run a B&K 4190 microphone in single-ended mode only. B&K has just way too high noise floor and lot of harmonics when I run it in diff mode. SO, I would like to know from you guys
if single ended referenced mode is better or the single ended non-referenced mode in terms of cutting cross talk between channels.

shantaram,
The bias resistor allows the input to the DAQ card to function properly. Without it the card may accumulate charges that distort the incomming information. The bias resistor provides a way for these charges to dissipate. The 100kohm resistor provides a path for these charges without influencing the signal of interest.
Try this link for some refences:
http://search.ni.com/query.html?tx0=Differential+bias+resistor&op0=%2B&fl0=&ty0=w&tx1=&op1=&fl1=&ty1=w&tx2=&op2=%2B&fl2=&ty2=p&tx3=&op3=-&fl3=&ty3=w&advquery=on&lk=1&nh=10&ht=0&qp=+contenttype%3ATutorial+subsection2%3AdzTechPres+subsection2%3AdzTutorial&qt=&qs=&col=alldocs&qc=&pw=575&la=en&qm=0&st=1&oq=&rq=0&layout=TechResources&ql=a&si=0
Or Search the Technica
l Resources for: Differential+bias+resistor
(limit the search to tutorials and application notes
at:
http://search.ni.com/?col=alldocs&layout=TechResources&ql=a
This is a good article:
Field Wiring and Noise Considerations for Analog Signals found in the tech resources.
Mike

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The following was misposted at the Real-Time DAQ category and should appear in this Multifunction DAQ category:
I am doing a differential measurement and then a non referenced single ended AI measurement using the same PCI 6025E card. Most of the time I get good measurements however a small percentage of the time I get very strange measurements.

Make sure that you have set up each of your channels for the appropriate mode of measurement. By default, Measurement & Automation Explorer (MAX) has a property set for your card, either differential, nonreferenced singled ended, or referenced single ended. If all your channels are in one mode, then you can just left those defaults stay. Otherwise, as in your case, you would need to programmatically set each channel for the right mode.
For instance, in LabVIEW, the AI Configure.vi has an input parameter for "coupling and input config". This is an array of data that includes the measurement mode. Each element of the array corresponds to the element in the channels array, so you can configure each channel appropriately. Make sure that you have this set up in yo
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Finally, double-check your physical connections to see that they match the measurement mode you chose. You can find this in the 6023E/6024E/6025E User Manual or the PCI E Series User Manual at the http://www.ni.com/manuals website.
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i wrote a program in VC++ which acquires some analog voltage channels using NIDAQmx. By means of the "DAQmxCreateAIVoltageChan()" function it works properly, but I've faced a question:
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Message Edited by devchander on 03-08-2006 10:30 PM
Attachments:
mode.vi ‏23 KB

How to connect single ended connections?

I am new in this field. I am trying to accquire single ended data on
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attached figure) . It works all right when i take input from signal
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[Attachment diagram.doc, see below]
[See first answer for additio
nal information]

[Attachment(s) for question]
Attachments:
diagram.doc ‏73 KB

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Which of single ended referenced & non-refere​nced is better in cutting crosstalk

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Which of single ended referenced & non-referenced is better in cutting crosstalk