Which configuration is better for a Microphone input ? Diferential, RSE or NRSE ?

[EDGAR_PLATRONICS]

I have a Analog input NI 9205 USB Module and I need to measure audio sound levels.

I am using a B&K Microphone coupled with an interface (ACO PS9200).

Since this signal is very low about -30 dBV, which input configuration is better for NI 9205 USB Module ?

The usewr guide shows 3 options: Diferential, RSE or NRSE.

I think it should be Diferential, but I'd like you opinions.

It is a 32 channel input and I will be using no more than 4 inputs.

THANKS

[BeCeGa]

Hi Edgar in general using the differential is better in the way that it reduces the noise, the trouble with this is that it halves your channel count.

The following link is a good tutorial of cabling and how to reduce noise, it also states the advantages of the different connections:

http://zone.ni.com/devzone/cda/tut/p/id/3344

I hope this helps

Best Regards