A repeater station is a combination of a radio receiver and a radio transmitter which receives a transmitted radio signal, which is generally weak, and retransmits the signal with a higher power. This enables the signal to travel across a longer range and preserves the quality of the transmission. A radio repeater in most cases serves as the base station for a group of radio users. Repeaters are used by organizations like police and firemen to transmit and receive radio signals all over a city. These organizations may use a repeater service which is a company that places repeaters and antennas all around a city so coverage is complete, or they may have their own private service.
A repeater station is generally placed on some higher ground or a hill-top to ensure that it receives and can transmit radio signals across larger areas. The lesser the interference from the building towers and hills, the better would be the quality of the signal received by radio users.
For a complete guide on how to buy and install repeaters click here .