Measurement receiver for digital television

Abstract

The invention discloses a digital television measurement receiver which comprises a measurement auxiliary circuit, a frequency converter, a channel demodulating circuit, a level switching circuit, a source decoding module, a USB communication circuit, an infrared and keyboard control circuit, a panel display circuit, a software control interface and an embedded system; the measurement auxiliary circuit is used for measuring parameters, such as minimum signal reception level and carrier-to-noise ratio threshold; the frequency converter reduces an RF analog signal to an intermediate-frequency signal and then outputs the intermediate-frequency signal to the channel demodulating circuit; the channel demodulating circuit carries out a demodulation processing to the signals and then outputs theprocessed signals to the source decoding module or the USB communication circuit, meanwhile, the level switching circuit realizes level switching; the source decoding module is combined with the infrared and keyboard control circuit, the panel display circuit and the software control interface so as to realize a function of human-computer interaction control; the channel demodulating circuit is electrically connected with the USB communication circuit, thereby realizing functions, such as the software control in an embedded system, information acquisition and processing in channels, and the like, and realizing remote control and remote information processing by the Internet.

Description

technical field [0001] The invention relates to a digital TV measurement receiver, which is a full-mode, comprehensive function, receiving The digital TV signal receiving, processing and measuring device with good performance, as an important part of the standard test receiver, is used to measure the ground receiving performance parameters of the signal conforming to the full-mode digital TV ground transmission standard, especially suitable for digital TV manufacturers at home and abroad Or the mobile test receiving equipment of the research institution, which is used to verify the digital TV transmitting or receiving equipment developed by various manufacturers, for frequency planning test, system level test and other projects. It can test the main technical indicators such as bit error rate, receiving level, image quality, etc., and can also be used for multi-system and full-mode digital TV receivers. It belongs to the field of digital communication. Background technique ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to change the current situation that the existing receiver has a single reception mode and no unified performance measurement standard, and at the same time add necessary measurement function modules and data output interfaces, and propose a full-mode, comprehensive function, and good reception performance. A Convenient Digital TV Measuring Receiver

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