Re: [Discuss-gnuradio] Input voltage for bladerf using gnuradio

[Marcus D. Leech]

On 01/19/2016 01:38 PM, Adriana Arteaga wrote:

Hello,

How can I get input voltage of RX antenna for bladerf using gnuradio?

Thanks,

You can't, at least, not directly.  The sample values you get in Gnu Radio are *proportional* to the voltage as seen at the antenna terminals,
  but the precise proportionality factor has to be determined through the use of a calibration source.

Between your antenna, and the ADC (and, by inference, Gnu Radio), there's typically, with all SDR radios a pile of "stuff" that provides gains
  and losses to the signal.  Those gains and losses are necessarily frequency/gain/sample-rate/per-device dependent.  So, the only way
  is to calibrate *your particular device* under some known settings.