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An Intro to RTL-SDR: Technical DSP Concepts Explained
Over on his blog Ajoo has posted a very comprehensive introduction to the technical concepts behind RTL-SDR, as well as any other SDR in existence. His post first goes through the basic communications...
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Explaining and Demonstrating Jam and Replay Attacks on Keyless Entry Systems...
Thank you to Christopher for submitting to us an article that he's written for a project of his that demonstrates how vulnerable vehicle keyless entry systems are to jam and replay attacks. In the...
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moRFeus: A Low Cost Wideband Signal Generator and Frequency Mixer
During development of the Outernet project the engineering team developed several tools to help them in their RF testing. One tool that they created has now been developed further into a commercial...
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A Review of the HackRF PortaPack (With Havok Firmware)
The PortaPack is a US$220 add-on for the HackRF software defined radio (HackRF + PortaPack + Accessory Amazon bundle) which allows you to go portable with the HackRF and a battery pack. It features a...
View ArticleUsing a Transmit/Receive Switch to Protect an SDR from a Transmit Radio
A question that comes up often is how to combine an RTL-SDR, or any other RX only SDR with a transmit capable amateur radio. It's not possible to connect the RX only SDR together with the TX radio via...
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Art from Satellite Transmissions: SatNOGS and Software Defined Radio used in...
One of the piezo speakers playing the satellite transmissions. In the past we've seen software defined radio's like the HackRF use to create art installations such as the 'Holypager', which was an art...
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Wireless LAN Professionals Podcast: What is HackRF, PortaPack, and HAVOC?
Over on the Wireless LAN Professional Podcast Keith and Blake Krone discuss the HackRF, PortaPack and the Havoc firmware in episode 138. The HackRF is a US$299 transmit capable SDR which has been very...
View ArticleGoing Portable with the Airspy HF+, Raspberry Pi and 7-Inch Touch LCD
Over on the swling blog we've seen a post where contributor 'Tudor' demonstrates his Airspy HF+ running nicely on a Raspberry Pi 3, 7-inch touchscreen LCD, and USB power bank. The video shows GQRX...
View ArticleExploring CubicSDR with a Video Tutorial
Over on YouTube Corrosive has uploaded a new video where he explores CubicSDR, and explains all the windows and settings that it has. CubicSDR is a free RTL-SDR compatible cross-platform open source...
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Using QIRX SDR and DAB Signals to Calibrate RTL-SDR Dongles
Over on his site, Clem the author of the QIRX SDR software package has written up a three part series where he explains an ultra-fast and very accurate method for calibrating the frequency offset of...
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Information on Time Correlating Signals with RTL-SDRs
In a previous post back in September 2017 Stefan Scholl (DC9ST) treated us to a very interesting write up about how to localize transmitters to within a few meters using time difference of arrival...
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Optimizing the RSP1A at LF/MW/HF by Understanding Intermodulation
SDRplay have recently published an informative white paper that explains what intermodulation and higher order mixing effects are, and how they can affect reception on an SDR such as the SDRplay. This...
View ArticleVideo on using an RTL-SDR + Noise Generator as a Poor Man’s Network Analyzer
Over on YouTube user AE0AI has uploaded a video where he explains how he uses an RTL-SDR and a home made noise source as a poor man's network analyzer. A network analyzer is a tool that allows you to...
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Automatically Receiving, Decoding and Tweeting NOAA Weather Satellite Images...
Over on Reddit we've seen an interesting post by "mrthenarwhal" who describes to us his NOAA weather satellite receiving system that automatically uploads decoded images to a Twitter account. The set...
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SirenJack: Security Vulnerability Found in Wirelessly Controlled Emergency...
Balint Seeber from security research firm Bastille has recently disclosed a major security vulnerability found in wirelessly controlled emergency sirens called "SirenJack". These sirens are used in...
View ArticleNexmon SDR: Using the WiFi Chip on a Raspberry Pi 3B+ as a TX Capable SDR
Back in March of this year we posted about Nexmon SDR which is code that you can use to turn a Broadcom BCM4339 802.11ac WiFi chip into a TX capable SDR that is capable of transmitting any arbitrary...
View ArticleHiring a Dev for Direction Finding & Passive Radar Software
We are currently looking for a dev or engineer to work on a short project that will involve developing easy to use software for passive radar and direction finding applications. The hardware will...
View ArticleDemonstrating the MFJ-1708SDR Automatic Relay Switch with an SDRplay and Icom...
A few weeks ago we posted about the MFJ1708SDR automatic relay switch and how it can be used to combine an RX only SDR with a transmit capable radio. An automatic antenna relay switch is used to...
View ArticleUsing a HackRF to Transmit To a Local Repeater
Over on YouTube Tech Minds has uploaded a new video where he shows how he can use his HackRF SDR with the SDRAngel software to easily transmit voice to a local ham radio repeater. If you are unfamiliar...
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SirenJack: Rebuttal by ATI Systems
Last week we posted news about the "SirenJack" radio security vulnerability which was released by Balint Seeber of the Bastille security research agency. SirenJack describes how a cheap TX capable SDR...
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