Terrestrial digital television station system

Abstract

The invention relates to a terrestrial digital television station system and belongs to the technical field of television signal transmitting and receiving. The terrestrial digital television station system comprises a signal processing subsystem, wherein the signal processing subsystem comprises a satellite receiving antenna, a satellite receiving decoder, an encoder, a digital exciter, a transmitter and a transmitting antenna; the satellite receiving decoder completes satellite signal receiving and decoding; the obtained video and audio signals are sent to the encoder, sent to the exciter by virtue of an ASI (asynchronous serial interface) interface, modulated into an RF (radio frequency) signal by the exciter and then transmitted to the transmitter; and the signals are subjected to power amplification by virtue of the transmitter and then are connected to a feeder by virtue of a rigid feedback element, an elbow and a flange and sent to the transmitting antenna to be transmitted out. The terrestrial digital television station system is easy to mount and can adapt to field operation tasks; meanwhile, the system is good in anti-seismic property, has good rainproof, dustproof, heat insulation, heat preservation and anticorrosion properties and can serve for a long time in wicked environments such as the wild, a mountainous area and salty air.

Description

technical field [0001] The present invention relates to the technical field of television signal transmission and reception, and more specifically, the present invention relates to a terrestrial digital television system. Background technique [0002] A television transmitter is a station that transmits television signals. It modulates the video signal and audio signal and converts it into a modulated radio frequency oscillation, which is sent to the antenna for transmission by the TV receiver. The TV transmitter equipment mainly includes the transmitter in the computer room and the associated signal input, monitoring, monitoring, and monitoring equipment, outdoor feeders, antennas, and iron towers, as well as auxiliary facilities such as power distribution systems, air conditioners, and communication equipment. [0003] When installing a TV transmitter in the wild or in mountainous areas, due to the complexity of the system, it is difficult to install the equipment. In add...

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Problems solved by technology

[0003] When installing a TV transmitter in the wild or in mountainous areas, due to the complexity of the system, it is difficult to install the equipment. In addition, there are often unpredictable problems in the installation of the system, and the installation of the equipment needs to be firm and reliable, shock-resistant, Anti-vibration requires not only complete functions, but also reliable system, strong environmental adaptability, good rainproof, dustproof, heat insulation, and heat preservation performance, and can work normally in harsh environments

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