i have a problem with daq- analog input

Hello.
I have a small problem with the ‘Data acquisition’ toolbox.
I am trying to get an input from a generator with a 5volt
pulse. Unfortunately, matlab is identifying it as a 10.6
volt, even when I don’t generate the power, which means that
by using the analog input toolbox I get always the same
voltage all the time, accept when I play with the voltage,
then I can see that there is a change in the voltage, and
then it goes hack to 10.6V. The weird thing is that when I
try the ‘daqscope’ demo, it shows me the true voltage.
This is all done after I defined the ‘nidaq’ device and the
right channel.

I can’t understand what’s wrong with it.
If anyone could help me, I’d be really thankful!

.

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