PXI-4462 settings...

[poklad]

Hi All!

Is it possible:

1. Set gain for particular channel using DAQmx Channel -> AI.Gain properties instead max/min voltage?

2. Set DC offset for particular channel using DAQmx Channel -> AI.DCOffset properties? What units of this offset?

3. What properties control LP analog filter? Or this filter always ON? May be this filter controlled by writing F/T to the AI.Lowpass.Enable properties?

Jury

[_kb]

Hi Jury,

1. Yes.  This article should be helpful.
2. DSA modules like the 4462 will remove a DC offset automatically when AC coupling is selected.  You'll select AI.Coupling as the property to write in your DAQmx Channel property node.  You will not be able to enter a value for the offset.  Related info, here.
3. The anti-aliasing filters on DSA devices are not configurable through a property node.  They automatically adjust with sampling rate to follow the Nyquist frequency.  The AI.Lowpass.Enable is not a property supported by these modules.

[poklad]

Hi!

Thank you for answer!

I understand, that AC input remove DC offset. But if I choose DC input, is it possible "manualy" to remove DC offset?

Jury

[_kb]

Sure -- there's no way to set a DC offset value for the hardware sampling on the DSA series -- but you could build your own post-processing logic into the acquisition code.