PMR446

For civillian use, there are 16 channels allocated to be used license free (mainly in European contries but many other contries outside European continent adopted this standard). Allocated frequency range is from 446 MHz to 446.2 MHz but since the standard already defined the channels with a fixed spacing of 12.5 KHz, the channels are already fixed for us. The channels are as follows:

Channel	Frequency
Channel 1	446.00625 MHz
Channel 2	446.01875 MHz
Channel 3	446.03125 MHz
Channel 4	446.04375 MHz
Channel 5	446.05625 MHz
Channel 6	446.06875 MHz
Channel 7	446.08125 MHz
Channel 8	446.09375 MHz
Channel 9	446.10625 MHz
Channel 10	446.11875 MHz
Channel 11	446.13125 MHz
Channel 12	446.14375 MHz
Channel 13	446.15625 MHz
Channel 14	446.16875 MHz
Channel 15	446.18125 MHz
Channel 16	446.19375 MHz

Confusion with dPMR446

To the best of my knowledge dPMR446 is just branding for digital radios which comply with the PMR446 standard (check [Legal notes](#Legal notes)). There is no separate standard called dPMR446.

Again, to the best of my knowledge, dPMR radios are not the same thing as DMR radios. While the Wikipedia page for dPMR at the time of writing mentiones dPMR modes (three of them) which seem like equivalents to DMR Tiers, they don’t function the same. DMR works by using TDMA to achieve two time-slots on one 12.5 KHz channel using 4FSK as a carrier, dPMR according to the Wikipedia page works by using FDMA (not sure what they achieve excatly with that) on 6.25 KHz channels using 4FSK as a carrier.

They also define their own channels inside the PMR446 allocated band with the first frequency being 446.003125 MHz and all others can be calculated with a step of 6.25 KHz. In total they have 32 channels compared to PMR446 with 16 channels.

Legal notes

By law (the one that many contries that adopted the PMR446 standard have), the radio that is allowed for personal license free use has to be battery powered, with a fixed non-detachable antenna and with max power output of 0.5 W (500 mW).