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

Thanks so much.

"The true noise power" I mean if I don't send anything just use the usrp to receive.Because don't have signal in the environment,the receive thing using the usrp is the noise.I want to know the power of the noise.Thanks.Hope to explain explicit.

Thanks.

2015-12-21 11:04 GMT+08:00 Marcus D. Leech <mleech@ripnet.com>:

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.



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