With the fifth railway speedup in China, many little commuter stations were withdrawn and the distance between two stations became longer and some even reach 30 kilometers. The former station radios cannot cover the whole commuter with enough field strength. Based on the former station radios, commuter wireless relay radio adopts multi frequencies alternate mode. It solves the problem of weak field of long distance between two stations after station withdrawing.
The radio is mainly composed of local radio and relay radio. The local radio adopts four-wire connection with scheduling operator and monitoring operator.15OM channel is adopted between local radio and relay radio to realize wireless communication and this can solve the problem of field strength covering of long commuter. The equipment adopts the techniques up to date with simple operation and many specialized functions.
The inside of the radio is composed of power supply pack, receiving/sending data unit, controlling unit and so on. Because every component is a unit, the maintenance is very convenient.
The radio measures up the standards of TB/T3052-2002 that is cab wireless scheduling communication system mechanism and main technique conditions.
Characteristics:
(1) Possess LCD and standard keyboard with convenient usage and maintenance.
(2) Possess the function of automatic switch of power supply. When the alternating current stops, the radio can switch to the battery unit for power supply and keep communication for a while. When the alternating current resumes the radio switches to it automatically.
(3) FFSK radio selection is integrated with single chip, which supplies convenient communication channel connecting the radio with the scheduling operator and the monitoring operator.
(4) The local radio and the relay radio both have testing buttons with self-monitoring. The local radio can monitor remote relay radios and display the results on LCD of the local radio.
(5) Realize the function of automatic monitoring of field strength.
(6) In the setup state, it can set up the number of relay radios, frequency group, address and so on.
(7) In testing and debugging state, it can test and debug every index of radios.
(8) Include the interface of extension controlling box.
(9) Include the interface of extension sound recording.
(10) Include the interface of scheduling commands.