Hytera DMR System Planner
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In repeater mode, the following applications are available:
Back-to-Back repeater application
Dispatch
Tele m et ry
Phone application
4.2.1 Back-to-back Repeaters
The back-to-back function realizes communication between analog and digital
terminals. It works as below:
1) When the portable radio R1 transmits, the repeater 1 will retransmit the signals
from R1 to the portable radio R2 and R3.
2) During retransmitting, the repeater 1 will output the audio signals to the repeater 2
via accessory pin and activate its external Mic PTT, triggering the repeater 2 to
transmit. This operation is not subject to the working mode and frequency of two
repeaters.
3) The portable radio R4, R5 and R6 receive audio signals from repeater 2. In this
way, R1 achieves communication with R2, R3, R4, R5 and R6 successfully.
4) The repeater 2 can also output the audio signals to repeater 1 via the accessory
pin, enabling all portable radios within the coverage of two repeaters to
communicate with each other.
Figure 4.2.1-1: Back-to-Back Work Principle
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