Re: [Discuss-gnuradio] GRC FFT Plot

[Sylvain Munaut]

> I transmitted this -30 dB signal (Image 1) using a usrp: The spectrum
> analyzer displays -50 dBm (Image 2) as its reading. My receiver end picked
> up the signal with the same peak power at -30 dB (Image 3). I'm confused.
> How do I convert the dB power in the GRC to the received signal of the
> spectrum analyzer in dBm? How do I convert the Power (dB) of the FFT to dBW
> or dBm?

Just remove 20 ....