(The system adopts the frequency modulation method to realize the simplex voice and data transmission service from the master station to the slave station. The transmitter is centered on the single-chip microcomputer SPCE061A, and the MC145151 phase-locked loop is used to end FM modulation and other functions; the receiver uses CXA1691 to end the FM demodulation function; the dual audio codec is introduced to end the data transmission; the commercially available infrared remote control is used to realize the English character of the transmitter. input of.)
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