The invention provides a multi-frequency point emergency broadcast realizing method, comprising the steps in sequence as follows: 1, a receiving terminal is provided with a plurality of receiving frequency points in advance, and controls a broadcast module to broadcast according to a pre-set prior sequence; and a broadcast front terminal can realize point-to-point or point-to-face broadcast to each terminal with an assigned and set individual address, so that the interference caused by
system external strong common-frequency signals can be effectively prevented; and
system encoding has uniformity and security; and 2, a terminal receiving and expanding
machine receives digital signals and searches an emergency
signal instruction under each frequency, so that the terminal receiving and expanding
machine is converted into an emergency frequency to broadcast emergency broadcast. The multi-frequency point emergency broadcast realizing method provided by the invention has the beneficial effects in that the broadcast front end can realize the point-to-point or point-to-face broadcast to the terminal, so that the interference of strong common-frequency signals outsides the
system can be effectively prevented, and the system encoding has the uniformity and the security; and RDS (
Radio Data System)
signal transmission uses a PSK (
Phase Shift Keying) modulation manner, so that the
signal transmission stability is high, and the
transmission rate is high.