Automatic anti-interference satellite digital broadcast television receiver

An automatic anti-interference satellite digital broadcast TV receiver is composed of an ordinary satellite digital broadcast TV receiver and a test and judgment controller, which samples and processes signals of AGC and ERROR of TUNE to judge if the received signals are attacked by illegal signals based on the absolute and relative variables of ERROR and AGC levels to generate judgment and control signals according to the QPSK modulation and demodulation principle and the performance of ordinary satellite digital broadcast TV receiver TUNE and actual analog interference experiment data and the ERROR and AGC level value of the TUNE is stable normally, but the amplitude is increased, C/N reduced and levels of AGC and ERROR of the TUNE are changed greatly.