He not only imparts a theoretical background but also explains numerous open source software tools. In this book, successful author and enthusiastic radio amateur, Burkhard Kainka describes the modern practice of software defined radio using the Elektor SDR Shield. Using an Arduino and the appropriate software, radio stations, morse signals, SSB stations, and digital signals can be received. Amateur radio is not only a hobby, it’s also an emergency radio system!Įlektor’s SDR-Shield (SKU 18515) is a versatile shortwave receiver up to 30 MHz. has put the PCB schematic and firmware available for download on his site. In the event of a global power outage, there is nothing more important than the short-wave. Software-defined radio or SDR means you get the RF signal to digital as soon. Although technology is striving for ever higher frequencies, and radio is usually listened to on FM, DAB+, satellite or the Internet, modern means of transmission require extensive infrastructure and are extremely vulnerable. By reflecting short-wave signals off the conductive layers of the ionosphere, they can be received in places beyond the horizon and therefore can reach anywhere on earth.
View the video to see how easy it is and learn about the variety of settings available in the SDR software for processing the received signals in many different ways.The short-wave technique has a very particular appeal: It can easily bridge long distances. It’s been optimised for receiving DRM and AM broadcasts but is also suitable for listening in to the world of amateur transmissions. This SDR project demonstrates what’s achievable, in this case a multi-purpose receiver covering all bands from 150 kHz to 30 MHz. Then you can spend hours listening to radio stations from 150 kHz to 30 MHz. SD (software-defined) radio receivers use a bare minimum of hardware, relying instead on their software capabilities. Simply plug the shield into an Arduino Uno, program the Arduino with the software provided by Elektor, connect a length of wire to the antenna input, and connect the Arduino to your PC. The key component of this relatively simple circuit is the Silicon Labs SI5351 CMOS clock generator, which communicates over the I☬ bus and has a frequency range of 8 kHz to 160 MHz. Now we have updated the previous design to create a new version in the form of an Arduino shield. The design was enormously popular, but the PLL chip used in the original design has unfortunately been discontinued. With this circuit you could receive radio signals over a wide frequency range, with demodulation performed by software running on a PC. Back in 2007 we published a project for a software defined radio (SDR) with a USB interface. Elektor has built and published a lot of radio receivers over the years.
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