SDR

Software defined radio

Unusual aircraft GPS interference

Finland’s Transport and Communications Agency, Traficom, has issued a public announcement informing of an unusual spike in GPS interference near the country’s eastern border. According to reports, the interference isn’t limited to Finland but also affects Poland, Lithuania, Latvia, and the broader Baltic region. This spoofing is relatively easy because the actual GPS signal is

Audio cable testing articles

Here are two articles that could be interesting and entertaining to read. In this first article the writer uses audio analyzing tools to to debunk spurious claims made by audiophiles, HiFi journalists, and the high-end audio industry about the quality of their products. This article covers using audio analyzers and also using SDR software to

SDR videos

Software-defined radio (SDR) technology can be used for many interesting technical experiments. With listening only SDR you can do many interesting things, but having a SDR that can also transmit opens many new doors. Here are some interesting videos related to SDR and cyber security: Universal Radio Hacker – Replay Attack With HackRF Download here:

The NSA’s Software Defined Radio application “RedHawk” is now open source

https://swling.com/blog/2019/01/the-nsas-software-defined-radio-application-redhawk-is-now-open-source/ page says that NSA released a bunch of software to open source at https://code.nsa.gov/ There is an interesting looking project called “RedHawk” which is described as: “A software-defined radio (SDR) framework designed to support the development, deployment, and management of real-time software radio applications.” github link: https://github.com/redhawksdr Here’s the documentation: https://redhawksdr.github.io/Documentation/index.html

USB VGA adapter as RF transmitter

Hackaday article Spoofing Cell Networks with a USB to VGA Adapter tells that at OsmoDevCon [Steve Markgraf] released osmo-fl2k, a tool which allows transmit-only SDR through cheap USB 3.0 to VGA adapters based on the Fresco Logic FL2000 chip. Available through the usual overseas suppliers for as little has $5 USD. The claim is that these devices

RF bridge for antenna measurements

I got a comment that recommended this RF BRIDGE 0.1 – 3000 MHz from http://www.transverters-store.com/rf_bridge/rf_bridge.html. It looked really interesting as I was planning to build something similar myself. The price was very reasonable ($10) so I had to test out it. Did the ordering, and quite quickly I received a letter from Ukraine that contained

Hard to build wide frequency range SDR kit

I have made many experiments with my DVB-T SDR stick. It can handle frequency range from around 30 MHz up to more than 1 GHz. There are cases, where there is need to receive lower frequencies. To make receiving those low frequencies with such cheap RTL-SDR receiving sticks, there are two approaches: using upconverter or

My antenna measurements with RTL-SDR

In my Antenna measurements with RF noise source posting I described how antenna measurements can be done with RF noise source, directional coupler and SDR radio (DVB-T stick). To do measurement we connect the noise source to the output of the coupler, the antenna to the input of the coupler and the RTL-SDR dongle to