Comparison of Analogue (NFM) and Digital (FDMA) Signals in PMR446 band

In the UK and other European Union countries, a set of radio channels have been allocated for use by the general public licence-free. Known as PMR446 (Public Mobile Radio on 446 MHz), a set of 8 analogue narrowband FM channels and 16 digital narrowband FDMA (Frequency Division Multiple Access) channels are available. Popular amongst hikers, […]

PMR446 analogue and digital signals

USB SDR radio receiver

Software Defined Radio – Wireless Waves Are Beautiful

As a radio ham I have recently become interested in a new branch of the hobby called Software Defined Radio (SDR). SDR is a radio system where the classic components of a radio receiver or transmitter has been replaced by a computer program, It’s only in recent times that domestic computers have become powerful enough […]