Re: [Discuss-gnuradio] FFT plot unit

[John Ackermann N8UR]

It might be helpful to clarify that since this is a voltage ratio, it's 
20log rather than the 10log used for power (e.g., doubling voltage is 
6dB, doubling power is 3dB), so the scaling will look different than a 
typical spectrum analyzer.  (It would be nice if the instrumentation 
blocks could have an option to select voltage, or power into 50 or 75 
ohms...)

On 8/3/2015 12:27 PM, Marcus D. Leech wrote:
> On 08/03/2015 12:24 PM, Martin Braun wrote:
> > This pops up a lot, and hence earned a spot on the FAQ a while back:
> >
> > http://gnuradio.org/redmine/projects/gnuradio/wiki/FAQ#How-do-I-know-the-exact-voltagepower-of-my-received-input-signal
> >
> >
> > ...although that section could surely be expanded.
> >
> > M
> I just did so :)