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List:       gnuradio-discuss
Subject:    Re: [Discuss-gnuradio] R820T frequency tuning issue
From:       jmfriedt <jean-michel.friedt () femto-st ! fr>
Date:       2015-02-27 12:23:27
Message-ID: 20150227132327.4fe5007b () debianjmf
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> As briefly mentioned on the #gnuradio IRC mailing list, I am facing an issue with tuning a R820T
                                            ^^^^^^^^^^^^
                                              channel

[...]

> I have completed the following experiment:
> * a frequency synthesizer (Rohde & Schwartz SMA100) is set to 1570 MHz, output power of -10 dBm,
> lab-made antenna (ie, dangling wire)
> * R820T DVB-T located next to the synthesizer
> * either running rtl_sdr -f 1570000000 -n 100000 file.bin and plotting the resulting log in GNU/Octave
> (f=fopen('file.bin');d=fread(f,inf,'uchar');plot(abs(fftshift(fft(d))))) ...
                      ^
             d=d(1:2:end)+i*d(2:2:end)

sorry for the mistakes.

JM

-- 
JM Friedt, FEMTO-ST Time & Frequency/SENSeOR, 32 av. observatoire, 25044 Besancon, France

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