#rtl_sdr

[orestz]

PothosSDR - Melhores Ferramentas RTL-SDR Para Windows

PothosSDR – Melhores Ferramentas RTL-SDR Para Windows

O Pothos SDR é um ambiente de desenvolvimento que inclui o conjunto de softwares de fluxo de dados Pothos e ferramentas gráficas, SoapySDR e kit de ferramentas pothos-sdr para hardware que fazem interface com vários drivers de fornecedores de hardware SDR comumente usados e kit de ferramentas GNU Radio para suporte ao processamento de sinais

O instalador do PothosSDR está disponível aqui.

A…

[darthquark]

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UHF Rx test rtl_SDR in Slackware 14.2 #XE1GNZ #rtl_SDR #Slackware (en Lord Jorge's Home)

[rxtronics]

Cheapskates spectrum analyzer

I have no money for a real spectrum analyzer but I expect to have the need for it.

So I took an old DVB-T USB stick which can be used as a quite universal Software Defined Radio (SDR). I don’t need to demodulate what the SDR (USB stick) receives, so let’s make a quick solution here.

On http://dekar.wc3edit.net/2012/09/30/osx-port-of-the-awesome-gqrx-sdr-software/ there’s an easy-to-use (and install) graphic front end called gqrx for the USB stick. Downloaded the DMG file for MAC OS X from there and installed it.

Didn’t work.

I startet the application gqrx, set it up to default values, and after that, the application wouldn’t do anything more.

So I opened a terminal window and startet the application rtl_tcp first.

After that, I restarted the gqrx application. As expected, it was then able to connect to rtl_tcp and thus access the USB stick.

Now, what did I want to do with it: I’m trying to discover GSM technology, so the homepage on http://niviuk.free.fr/gsm_band.php a GSM frequency was found where there should be some signal.

Where this ARFCN of 4 came from? Used the field test mode on my Android smart phone. Type *#0011# into your Samsung Galaxy S3 phone and under the parameter BCCHFrq you find the ARFCN. So it was clear that on this channel / frequency I’ll find a signal.

Above you can see the result of gqrx when configured to look at the area around 935.6 MHz. As you can see, the cheap antenna was sufficient to receive the signal. Be sure to use “Filter=Wide" in gqrx.

Job done. I can now detect GSM signals.

[orestz]

Analisador de Espectro de Banda Larga com um RTL-SDR

Para a maioria dos utilizadores do RTL-SDR, a cascata (waterfall) é o auge do software de rádio. Mas há alguns problemas que me incomodam.

     – Exibição de frequência limitada. Normalmente, não pode fazer mais do que a largura de banda nativa do seu SDR permite.

     – Exibição por tempo limitado. Ela simplesmente rola da borda para o vazio.

     – Blocos (bins) de FFT limitados.…

[darthquark]

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SDR RTL Slackware 14.2 ESTA VIVO!!!! #rtl_sdr #XE1GNZ #Slackware (en Lord Jorge's Home)