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

[Marcus D. Leech]

On 12/20/2015 09:58 PM, w xd wrote:
> Hi,
>      I want to know the true noise power(in dbm) of the usrp n210.And 
> i'm using the sbx and lp0964 antenna.
>      Do someone have the data?
>
>      Thanks.
>
> Best Regards,
> xs w
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.