Over on the RTL-SDR blog, there’s a tutorial covering the measurement of filter characteristics using a cheap eBay noise source and an RTL-SDR dongle. For this tutorial, the key piece of ...

There was a time when a ham radio set up sported many dials and switches and probably quite a few boxes as well. Computers have changed all that. Some transceivers now have just a few buttons or ...

The article makes the case for software defined radio (SDR), and discusses strategies for balancing flexibility, energy efficiency and spectrum use. It looks at different hardware architectures, ...