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Do you know how a repeater works?

作者: 来源: 浏览次数:740 Published: 2019-01-21 Author: Source: Views: 740

Do you know how a repeater works?

Repeater is a device used to increase communication distance and expand coverage in wireless intercom system. Repeaters are also called relay stations, repeaters, and differential stations, which are indispensable and important equipment in the field of dedicated mobile communications. The role of repeaters is to relay and amplify signals. Used to increase communication distance and extend signal coverage. Let ’s talk about the working principle of the repeater:

The working principle of repeaters Generally speaking, the range of radio users is often limited by the power of the radio. Therefore, a group of radio users can only move within a certain range. When a user exceeds the range of the radio, Unable to talk to other users in the group.

SLR5300 Digital Repeater


The repeater is actually an inter-frequency duplex transceiver, and mobile users should also use inter-frequency transceivers to work with it. Assume that the receiving frequency of the repeater is f1 and the transmitting frequency is f2. Then, the receiving frequency of the user's radio is f2 and the transmitting frequency is f1. At the same time, in order to increase confidentiality, reduce interference and false triggering, the same CTCSS, DCS or DTMF pilot signalling signal should be set between the repeater and the user's radio. When user A initiates a call, the repeater receives the signal and performs demodulation. When it detects that the signaling signal sent by A is consistent with its own setting, it starts the transmitting circuit and uses the demodulated voice signal to modulate and transmit the VCO. In this way, user A's voice is forwarded, and other users in the same group within the range of the repeater can receive A's call.

The above is the working principle of the repeater. After reading the text, do you have a deeper understanding of the working principle of the repeater?


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