ni daq InputRange

when I do : out = daqhwinfo(ai); >> out.InputRanges

ans =

-20.0000   20.0000
-10.0000   10.0000
 -5.0000    5.0000
 -4.0000    4.0000
 -2.5000    2.5000
 -2.0000    2.0000
 -1.2500    1.2500
 -1.0000    1.0000
It means my hardware has several InputRanges, but when I try to change it I have this error:
set(ai.Channel(1),'InputRange',[-2 2])
Warning: This hardware could not support the requested values [-2.000000
2.000000] for InputRange.  InputRange has been set to [-10.000000
10.000000].

Somebody has a good answer to resolve this problem?

wilson

Answer 1

[Walter Roberson]

I suggest trying

set(ai.Channel(1),'InputRange', out(6).InputRanges)

I am working here on the basic hypothesis that the 2.0000 and -2.0000 that you see in the display might be display-rounded values of the actual ranges returned; the above code should pass back the actual range returned.