jdubin
Posts: 12
Joined: Sun Jun 03, 2012 2:27 am

Raspi and RTL-SDR

Thu Jun 28, 2012 8:02 am

Well, it's not polished yet, but preliminary tests show that the Raspi has enough power to do some simple NFM software-defined radio work with RTL2832U-based DVB-T USB TV tuners.
I was able to compile rtl_fm (an optimized version of Osmocom's rtl-sdr software), which allowed the Raspi to tune a frequency (162.55 MHz, weather radio band in the US) and play it real-time. The Raspi's internal sound kept hanging, so a cheap USB audio device was used instead. The audio is choppy, but CPU usage is only around 62% - which is promising.

sexton
Posts: 2
Joined: Wed Jun 20, 2012 5:31 pm

Re: Raspi and RTL-SDR

Sat Jul 07, 2012 10:41 am

Was the dongle powered by the Pi or externally?

jdubin
Posts: 12
Joined: Sun Jun 03, 2012 2:27 am

Re: Raspi and RTL-SDR

Sat Jul 07, 2012 2:58 pm

By the Pi. The Pi itself was powered with a 2A power supply (originally an HP Touchpad power adapter).

benryanau
Posts: 1
Joined: Tue Aug 14, 2012 9:31 pm

Re: Raspi and RTL-SDR

Tue Aug 14, 2012 10:18 pm

Thought ot using the Pi as a USB-IP converter and piping the feed back to a more powerful PC running an SDR app in a VM?
Would this work? You can get away from thePC's RF noise, and keep the tuner close to the antenna this way..

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