December 8, 2013

Pytacle – A GSM Decoding/Decrypting Tool Now Supports RTL-SDR

Pytacle, a Linux tool used for automating GSM sniffing has been updated to alpha2, and now supports the RTL-SDR dongle with this update.

According to the website pytacle is

a tool inspired by tentacle. It automates the task of sniffing GSM frames of the air, extracting the key exchange, feeding kraken with the key material and finally decode/decrypt the voice data. All You need is a USRP (or similar – [RTL-SDR]) to capture the GSM band and a kraken instance with the berlin tables (only about 2TB )

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December 8, 2013

SDRSharp Video Tutorial

If you’re new to the world of low cost software defined radio, and have just been through our Quickstart guide, this YouTube tutorial video by Clayton Smith on using the SDR# program may be useful to you.

In the video Clayton explains how to use SDR# and some of its many features, how to calibrate the RTL-SDR offset in the software, and he also shows how to receive a few interesting signals in his area.

Getting started with SDR# and an RTL SDR tuner

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December 5, 2013

Nooelec RTL-SDR Giveaway on AmateurRadio.com

AmateurRadio.com has teamed up with Nooelec.com to give away RTL-SDR packages to 10 hams. To be eligible to enter the competition, you must be a registered amateur radio operator, and you must comment on the competition page. The prizes are

Two (2)
Complete HF sets including:
NESDR Mini receiver
Ham It Up upconverter
SMA to MCX cable
SMA to BNC adapter
SMA to PL259 adapter
SMA to F adapter

Two (2)
Complete Touch SDR sets including:
NESDR Nano receiver
SDR Touch license (for Android tablets)
USB OTG micro & mini cables

Three (3)
NESDR Mini receivers

Three (3)
NESDR Nano receivers

The competition runs until the 11th of December.

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December 4, 2013

AirSpy – A New 12Bit, 20Msps SDR Dongle Prototype by the Author of SDRSHarp

AirSpy is a new SDR Dongle currently being prototyped by the author of the popular SDRSharp software receiver platform. The technical specifications are as follows

– 24 – 1750 MHz range
– 12bit ADC @ 20msps
– Cortex M4F @ 204 MHz
– 10 MHz panoramic spectrum view
– Highly programmable / customizable

AirSpy also uses the R820T tuner, which is commonly used in the RTL-SDR as well.

Compared to the RTL-SDRs 8bit [email protected], this is a large improvement, but we hope it will not cost much more than the RTL-SDR or FunCube.

Currently, if you want more information on the dongle there is only an AirSpy Yahoo Group available.

AirSpy Prototype Front

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November 30, 2013

ADS-B Decoder for the RTL-SDR now available for Android

A (beta version) of an ADS-B decoder and display app for the RTL-SDR dongle for Android has been released. This app allows you to receive the ADS-B radio signals emitted by modern aircraft, which contain information such as flight number, latitude, longitude and altitude, essentially giving you a live portable aircraft radar.

To use the app, you will need an Android device that supports USB OTG, which most Android devices on Android 4.0+ should support. You will also need a USB OTG cable, and an RTL-SDR dongle. You may want to consider a USB OTG cable that has a second port for external charging capabilities, as the RTL-SDR can drain the battery quickly.

The app is cheaply priced at under $2, so give it a try!

Watch this video on YouTube

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November 26, 2013

Demonstrating GQRX Running on a BeagleBone Black with RTL-SDR

YouTube user Brad Bowers has posted a video showing GQRX running on his BeagleBone Black with an RTL-SDR dongle. The BeagleBone Black is an embedded Linux computer, similar to the Raspberry Pi, but with significantly more processing power. He found that GQRX actually performed quite responsively on the BeagleBone.

Beagle Bone Black as Rtl-SDR front end with gqrx

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November 25, 2013

Reverse Engineering Radio Controlled Bus Stop Displays

Over on her blog www.windytan.com, Oona has shown how she was able to reverse engineer a radio controlled bus stop display using a receiver like the RTL-SDR. Radio bus stop displays are used by bus services to display GPS enhanced bus timetables and expected bus arrival times.

Oona discovered that the bus displays in her area use Data Radio Channel (DARC) encoding. Once she discovered that no DARC decoders exist online, she implemented the full five layer DARC protocol stack in Perl and was left with data packets that had some human readable strings containing information such as bus terminal stations. With some extra work she was able to also get more information such as expected waiting times and bus numbers as well.

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November 25, 2013

Using the RTL-SDR to listen to the Funcube Satellite

Recently, the FUNcube-1 satellite was successfully launched. The FUNcube is a CubeSat (a low cost miniature 10cm cube sized satellite) which is intended mainly for educating young people about radio, space, physics and electronics, but has also piqued the interest of amateur radio hobbyists.

Amateur radio hobbyist N4JTC’s has shared on his blog his experiences with receiving the FUNcube-1’s telemetry using his RTL-SDR dongle. By using the RTL-SDR to receive the telemetry beacon as the satellite passes overhead, he was able to use the FUNcube Dashboard software to record and decode and view the satellites telemetry data.

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