In GNU Radio Companion, I have created a very simple flow graph where I generate a 1 kHz, 2.0 volts peak-to-peak sine wave, and feed it into an FFT sink and a time domain sink.
The reference dB in the FFT sink is set to 0, and the reference scale is set to 2.0.
As such, I would expect to see 0 dB on the FFT display, but I instead see −10 dB.
Why is this? Is it a problem in my understanding, or a problem in GNURadio?
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