Digital train broadcasting transmitter

Abstract

Provided by the invention is a digital train broadcasting transmitter that comprises a power supply module, an output control module, a control main board and an output display. An input terminal of a power filter is connected with a 48-V train power supply and an output terminal thereof is connected with a rectification circuit; a voltage sampling circuit, a current sampling circuit, a power amplification board is connected in parallel with the rectification circuit; a switching board for switching of a main power amplifier and standby power amplifier is connected with a primary coil of an output transformer and a secondary coil of the output transformer is connected with a broadcast output binding post; the main power amplifier and the standby power amplifier are connected with the control main board; control signals and sampling signals are inputted into the control main board; and the control main board is connected with an emergency control switch, the output display, a monitoring loudspeaker, a pre-stage amplification board, a radio antenna and an AMR module. According to the invention, the beneficial effects of the digital train broadcasting transmitter are as follows: microphone broadcasting, built-in microphone broadcasting, wireless microphone broadcasting, voice synthesis broadcasting, and radio broadcasting can be realized and insertion broadcasting can also be carried out. Meanwhile, train state monitoring is carried out according to the train broadcasting requirement.

Description

technical field [0001] The invention relates to a train broadcaster, in particular to a digital train broadcaster. Background technique [0002] The audio playback device of the traditional train broadcast uses an analog tape playback form. The disadvantage of this method is that the broadcaster must first insert the tape to be played into the audio playback device during operation, and then find the content to be played by rewinding the tape. Playing, this method of operation is completely based on the experience of the broadcaster, so the operation is very inconvenient, and it cannot be played accurately and in time. At the same time, due to the wear and tear of the tape itself during use, the playback quality will also decline. Once the tape is lost or damaged, it will seriously affect the normal broadcasting work. Contents of the invention [0003] The problem to be solved by the present invention is to provide a digital train broadcasting machine, which can broadcast...

AI Technical Summary

Problems solved by technology

[0002] The audio playback device of the traditional train broadcast uses an analog tape playback form. The disadvantage of this method is that the broadcaster must first insert the tape to be played into the audio playback device during operation, and then find the content to be played by rewinding the tape. Playing, this method of operatio...

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