On 07/15/2010 10:20 AM, Patrick Yeon wrote:
Not quite. Noise figure is a measure of the degradation of SNR, so if
you know your input SNR, you would know that the measurements from the
USRP will have a 35 dB worse (lower) SNR. Alternativley, you know your
input SNR is 35 dB better (higher) than what you measure "coming out of"
the USRP.
>
> --
> Patrick Yeon
> ThinkRF
> 613-369-5104 x418
No, that's not how it works either. The SNR is only degraded by an
amount equal to the noise figure if the input signal has a noise floor
of the thermal minimum (i.e. straight from an antenna). For anything
coming through a device with gain or noise would not fit that criteria.
Matt
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