The TV signal receiver of the compound differential distortion demodulation of method reducing effect is suitable for receiving and the compound of demodulation TV signal

摘要

The influence that differential distributed amplifier synthesis TV signal is provided in broadcast system is reducing. In scheduled interval, broadcast singal includes that test signal has high fdrequency component at least three average video signal levels. By visual demodulator (20) after the receiver being suitably equipped with, receiver demodulation, the test signal identification of signal will be tested by detector (34). Many different average video signal levels of the test signal of measuring instrument (24) measurement distortion, correction needed for calculating deforms influence in the signal level of each measurement to minimize, and will pass through filter circuit (32) from the signal of bolt wave in address location in patch memory (28). The correct application of storage carries out further amendment to interpolater (40) and exports other average video signal levels, and export correction is to be applied to subsequent received TV signal by controllable balanced device (38). IMAGE