Dithering And Averaging With The 6025e Board

Hi Guys,
I'm trying to acquire a video analog signal, using the 6025e board. I've read that this board is able to dither and/or average the data stream in order to improve the signal and lower the noise.
The problem is that I did not find how to enable/disable dithering or averaging. Can you help me out with that ?
Also, are there any parameters for dithering and averaging that I can additionally control (dither noise level, number of points to average) ?

Hi AnalogKid2DigitalMan, thank you very much for your reply.
First, can you please explain why I can reliably sample only 100KHz signals maximum  ?
Secondly, If you meant that the sampling rate of this board is too slow, then it's okay since we're using a laser scanning microscope which produces a very low rate H-Sync of about (100 - 500 Hz). Our only concern is that in the time between 2 H-Syncs, the board would be fast enough to acquire a given number of pixels. For example say we have H-Sync of 200 Hz, and we would like to have an 1000x1000 image, then the time it takes between 2 H-Syncs is 1/200 = 0.005 sec. We need 1000 pixels during this time, so 1/(0.005/1000) = 200KHZ is the sample rate required for us.
A. Does anybody know how to activate/disable the dithering and the averaging capabilities of the 6025e board ? ( And if there are parameters that enable more control over these functions ).
B. Does dithering/averaging lower the effective sample rate of the board ?
Your help is kindly appreciated.

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