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Spying on Keyboard Presses with a Software Defined Radio
Last year Milos Prvulovic, a computer science researcher uploaded some videos to YouTube showing how he was able to remotely and covertly record the keystrokes of a target laptop in another room...
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Mods and Performance of an R820T2 RTL-SDR
Over on his blog, RTL-SDR experimenter Laidukas had added a post showing how he modded his R820T2 RTL-SDR for improved noise performance. The mods he applies are: Addition of 100nF, 1nF and 100pF...
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Testing the built in IF Filter on the R820T RTL-SDR
As seen in this previous post, the R820T tuner chip used on most RTL-SDR’s has a built in hardware tunable IF filter. Leif, the programmer of the Linrad SDR software has been experimenting with this...
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New SDR# RTL-SDR Driver with LNA/Mixer/VGA Gain Settings and Decimation
A new SDR# driver for the RTL-SDR that comes with manual settings for the LNA/Mixer and VGA gain stages as well as software decimation (in Russian use Google Translate) has been released on rtl-sdr.ru....
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Building a Simple Downconverter for the RTL-SDR
Over on YouTube Adam Alicajic, seller of the LNA4ALL low noise amplifier has uploaded a video showing how to create a simple downconverter using a 1.3 GHz local oscillator and an LNA4ALL. A...
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New software rtl_heatmap: Web based waterfall plotter for rtl_power
Over on GitHub a new heatmap plotter for rtl_power has been released. The software is called rtl_heatmap and is software that can be used to create a heatmap from the csv data produced by rtl_power....
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Airspy Reception Tips and Tricks: Receiving Weak Signals with Strong Nearby...
Over on YouTube user Mile Kokotov has uploaded a video showing how he optimizes reception of weak signals in the presence of strong signals on the Airspy software defined radio. He writes: Using Airspy...
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Comparing the Ham-It-Up Upconverter with the SV1AFN Upconverter
Over on YouTube user Mile Kokotov has uploaded a video showing a comparison between the ham-it-up and SV1AFN upconverters. An upconverter allows reception of VLF to HF signals with SDR dongles such as...
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New RTL-SDR Radio Data System (RDS) Decoder: Redsea
Signals hacker Oona Räisänen has released on GitHub a new software tool for the RTL-SDR called Redsea. On her blog she explains that Redsea is a Linux and OSX compatible perl based command line Radio...
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SDR# Plugins: Frequency Manager Updated and New RDS Logger Plugin
Recently the commonly used frequency manager plugin for SDR# was updated to version 1.6. The latest version can be downloaded from http://www.sdrsharpplugins.com/. The updates are as follows: The...
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Testing GNU Radio on the Raspberry Pi 2
Earlier this year the successor to the hugely popular Raspberry Pi, the Raspberry Pi 2 was released. The Raspberry Pi 2 is a mini embedded computer that can run Linux. Over on the RS Design Spark...
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Using filters to deal with interfering transmissions on the RTL-SDR
Over on a German ham blog Hamspirit.de, a contributer called Jan has written a post showing his results with filtering and the RTL-SDR (language in German, use Google translate). Jan uses a DPX-210-270...
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Sigidwiki and our Facebook and Twitter Pages
Our radio signal identification wiki sigidwiki.com has now been running for half a year and is starting to collect a wide range of example signals. We just wanted to remind you of the site and to...
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Getting started with amateur satellite reception and the RTL-SDR
Over on the hamspirit.de blog the author Jan has uploaded a post introducing the hobby of amateur satellite reception with the RTL-SDR (in German, use Google Translate). Amateur radio satellites may...
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Recovering 433MHz Messages with RTL-SDR and MATLAB
Recently RTL-SDR.com reader Ilias wrote in to let us know about a post he uploaded to his blog showing how he was able to decode data from a device transmitting at 433 MHz using an RTL-SDR and MATLAB....
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SDR-J Updated to Version 0.98
The RTL-SDR compatible DAB Radio receiving software SDR-J has recently been updated to version 0.98. DAB stands for digital audio broadcasting and is a type of digital radio signal used in some...
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The SatNOGS Story
In a previous post we talked about the SatNOGS project which aims to provide low cost satellite ground stations (where one critical component is currently an RTL-SDR dongle) along with free networking...
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Highlighting some SDRPlay Reviews
The Radio Spectrum Processor (RSP) by SDRplay is a receive only software defined radio with a 100 kHz to 2 GHz range (with a small gap at 380 MHz to 480 MHz), a 12-bit analogue to digital converter...
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The International Space Station is Transmitting SSTV Images
Happysat, a reader of RTL-SDR.com has written in to remind us that the International Space Station (ISS) is currently transmitting slow scan television (SSTV) images out of respect of the 80th birthday...
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SDR Capture The Flag Competition Tutorial
During several hacker and security themed conferences (Shmoocon, Bsides, Derbycon, Defcon, etc) organizers from Wireless Village have been setting up competitive WiFi and SDR themed capture the flag...
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