Vehicle mounted Radio and Repeater, what is the difference?

ALAFONE G550 Mobile Radio 25W 108-520MHz Full Band AM AIR Band 999 Channels Amateur GPS Radio Car Radio Station with Mic

Vehicle mounted Radio purpose:

The onboard station is installed on the vehicle and powered by the onboard power supply and uses the onboard antenna. It can be installed on the vehicle or indoors; Mainly used for transportation, production scheduling, security command and other businesses. It has a large volume, power and communication distance: the power is not less than 10W, usually 25W. The maximum power is 60W for VHF and 50W for UHF, and there are also some on-board stations with a power of 75W in a certain frequency band. The power supply of the car mounted radio is 13.8V. Due to the high transmission power of the car mounted walkie talkie, the communication distance is much longer than that of conventional handheld walkie talkies. The communication distance can reach over 20 kilometers, and in wireless communication networks, the communication distance through the central turntable is significantly increased, reaching tens of kilometers.

With the rapid development of transportation, especially the increase of private cars, the number of individuals purchasing in car radios (belonging to amateur radio enthusiasts) will continue to expand.

What is a Repeater ?

Relay stations are essential equipment for professional wireless communication systems. In wireless intercom systems, relay stations are mainly used to increase communication distance and expand coverage range of devices, such as expanding the call range and communication ability of car mounted stations and handheld intercoms, greatly improving your work efficiency.

Features of Repeater:

In wireless intercom systems, relay stations play an extremely important role in increasing communication distance and expanding coverage range. It is an essential equipment for professional wireless communication systems. The relay station is composed of units such as a receiver and a transmitter. Usually working in the state of transmitting and receiving different frequencies, it can demodulate the modulated RF signal received into an audio signal and transmit it to other devices. At the same time, audio signals sent by other devices can also be modulated by radio frequency and transmitted out. The other devices mentioned above include controllers used by various systems, wireless connectors, and other relay stations required for interconnection. The most basic application of a relay station is to directly forward the signal received by the relay station through its own transmitter.

Application areas of Repeater:

Therefore, the relay station must be able to work in full duplex, that is, transmit and receive simultaneously, and the transmission must not affect the normal operation of the receiver. Due to the basic characteristics of relay station operation and the combination of multiple relay stations, there are higher and more special requirements for the technical specifications of relay stations compared to mobile stations. In addition to a single channel conventional ground communication system composed of a relay station, multiple distributed antennas can be installed through coaxial cables and power dividers on the relay station to achieve underground and ground coverage communication in buildings such as hotels. In addition, multiple relay stations form a cluster system and various strip or star shaped communication networks. The indicators of relay station debugging and integration installation directly affect the communication distance of the system and the quality and function of the system network voice.

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