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create differential signal from 6289

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Is is possible to create a differential sine wave on the output of the 6289? And how would I do this.

I created a differential DC signal by making AO0 positive 1V and AO1 negative 1V. Then measured the signal on a differential input ADC, which is my DUT.

Now I am trying to trim CMRR and wanr to use the DAQ6289 because I don't want to add another piece of equipment to the test plan.

 

Any ideas would be appreciated.

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Could you please specify what you mean by differnetial AC output? One way to do this is to output an AC signal with a DC offset and measure it accross a constant that's the same as what the DC offset is. For example, have one output be an AC signal with an offset of +1VDC and have another which outputs a constant +1VDC. Is this what you are trying to accomplish?

 

Daniel G.

National Instruments

ni.com/support

Daniel G.
Semiconductor & Wireless
National Instruments
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This is now for my interest as I have found a work around.

 

BUT

 

What I was attempting to do is produce a sine wave @ 1V, 60Hz on pin AO0 and a sine wave 180 degrees out of phase on the AO1 pin.

 

Is that possible?

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Solution
Accepted by topic author BeanBoy

Please take a look at this example to see how to generate off phase sine waves:

 

http://zone.ni.com/devzone/cda/epd/p/id/5001

 

Have a great day!

 

Daniel G.

National Instruments

www.ni.com/support

Daniel G.
Semiconductor & Wireless
National Instruments
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