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From: | Marcus D. Leech |
Subject: | Re: [Discuss-gnuradio] Input voltage for bladerf using gnuradio |
Date: | Tue, 19 Jan 2016 13:42:46 -0500 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
On 01/19/2016 01:38 PM, Adriana Arteaga
wrote:
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. |
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