What is the function of a repeater in radio communication?

In radio communication, the function of a repeater is to retransmit messages on a different frequency. Repeaters play a crucial role in extending the range of communication by taking a weak or low-level signal and amplifying it so that it can travel further distances. When a radio signal is received by a repeater, it may often be on a specific input frequency; the repeater then broadcasts the amplified signal on a different output frequency, allowing for better coverage in areas where direct communication may not be possible due to obstacles or distance.

This operation is especially important in emergency services, where reliable and clear communication can be critical. Repeaters help ensure that messages can be transmitted over long distances without significant loss of quality, thereby facilitating efficient coordination and response efforts among EMTs and other emergency personnel.