GPIA gain value

[TheWay]

Hi there,

In DAQmx, the PGIA gain is automatically set based on the DAQ device you are using and the analog voltage ranges (maximum and minimum values) you have configured.  For example, if you are using a 6251 and you set the limits to be -10 to 10V, the gain is 1. If you set the limits to be -5V to +5V, your gain will be 2.  You are no longer able to directly query the gain value (from a property node) for the 6251 in DAQmx.  You will need to manually calculate the value based on the device's available ranges and voltage limits you have set.  Nevertheless, I'd be interested in knowing why you need the gain value of the PGIA for. 

Regards,

Way S.

[pdupre]

Hello,

I like to know what I am doing. Is it not enough ?
An amplifier is always a source of noise which is gain dependend.
So you are telling me that for a -10 +10 V range, the gain is 1 and so on.

Regards.

[TheWay]

Hi,

Yes, the gain is 1 if your range is -10 to +10 V range and so on.

Way S.