08.15.2025
PMR Frequency
by Karel Keers
Band: 446.0–446.2 MHz
Analog PMR446 uses narrow FM in a 12.5 kHz raster, 16 channels.
dPMR uses FDMA in a 6.25 kHz raster, 32 channels.
dPMR -> NXDN -> 4FSK/FDMA
Used by Icom IC-U20SR
PMR446 DMR (Tier 1) uses TDMA in a 12.5 kHz, 16 channels.
Both digital codes uses 4-level FSK modulation at 3.6 kbit/s
Source: https://en.wikipedia.org/wiki/PMR446
Complete overview in Dutch:
https://www.groveld.com/articles/pmr-frequencies
https://www.rtlsdr.nl/pmr-446mhz
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