Re: [Discuss-gnuradio] The noise power of the USRP

[w xd]

Thanks so much.

            If in a general indoor environment(no people),we just use a usrp as a receiver and in a quiet frequency band,have someone have the

general data?Can you give a non-official data?around -80dbm?or -70dbm?

            Or how to measure it?What is the true way to measure it?

     

         

Noise figure depends on frequency and gain setting:

http://files.ettus.com/performance_data/sbx/

Performance data includes noise figure.

Not sure what you mean by "true noise power".  But noise figure tells you how much extra noise is added by the device itself.

A 3dB noise figure is equivalent to a PSD of -174dBm/Hz.
A 5dB noise figure is equivalent to a PSD of -172dBm/Hz.

And so on.



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