Good day to all,

i have some question regarding the y-axis in usrp_fft.py… it is

labeled

in unit dB. so how does it convert from ADC value to dB? the output from

after c2mag block we got the magnitude value of the power isn’t it? so

how

does from the ADC value it convert to the power? what is the formula?

second, what is this formula mean?

log = gr.nlog10_ff(10, self.fft_size,

-20*math.log10(self.fft_size)-10*math.log10(power/self.fft_size)). i

think

this is to convert from power in magnitude domain to dB… is it? what is

the

actual formula on this? thank you very much in advance

## Adib

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