Digital Mobile Radio
DMR was originally designed by ETSI for commercial applications. This is evident in the user interface where numbers are used in lieu of call signs. DMR modulates with 4FSK, indicating that it uses 4 frequencies (compared to D-Star with 2 frequencies). This allows to double the data rate to 9600 bit/s. The higher rate allows the transmission of 2 channels at the same time (2 time slots).
There are multiple DMR networks available:
The DMR Plus network is developed and operated by the DV4 team, the DMR-MARC network by the Motorola Amateur Radio Club, the Brandmeister network by a team of Russian developers, and others.
Local Repeater: AB4NP
PROGRAMMING DMR Radios
Programming any DMR radio can be a daunting task. Review the following for a basic introduction to programming the Hytera radio using the CPS software.