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U2353A problems using 3 analog input channels

Question asked by tomwot on Dec 9, 2008
Latest reply on Dec 10, 2008 by dnt
Hello,

I hope someone can help me.
I have a problem when using the U2353A for digitizing 3 analog input channels with SCPI-Commands in VEE or C#. With only one channel it works well. But when I use 3 channels with the same setting I get to much value:

* 1 channel (@101), sample rate=1000, sample points=1000
   -> I get 2000 value (8bit), which means 1000 16bit values -> that seems to be right

* 3 channels (@101,102,103), sample rate=1000, sample points=1000
   -> I get 10000 value (8bit), which means 5000 16bit values -> but I expected only 6000 values (8bit), whats wrong?

* When I use the burst mode, I get the right amount of values (6000 for 3 channels) but the are not in the right order!

A second problem I have is that it seems to use a range of +-10V for analog input (bipolar and diff.), although I used another setting.

I would be glad if someone can help me,
best regards,
Thomas  

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