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From: | Marcus Müller |
Subject: | Re: [Discuss-gnuradio] m.data in usrp_spectrum_sense.py |
Date: | Thu, 11 Jun 2015 16:05:02 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
ah! the meaning of m.data is explained a few lines before, line
284[1]: > m.data are the mag_squared of the fft output As I explained, the value that gets displayed is just the squared magnitude of the FFT -- that means that values displayed are somehow proportional to the powers in individual frequency spans, but they are just proportional -- which means the relationship between the dB displayed (dB relative to the digital value of 1) and real world power (relative to for example 1mW, which could then be displayed as dBm) is something that you will have to calibrate yourself. Best regards, Marcus [1] https://github.com/gnuradio/gnuradio/blob/master/gr-uhd/examples/python/usrp_spectrum_sense.py#L284 On 06/11/2015 02:20 PM, Ashraf Younis
wrote:
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