JPH01124785U

JPH01124785U -

Info

Publication number: JPH01124785U
Application number: JP2070188U
Authority: JP
Priority date: 1988-02-19
Filing date: 1988-02-19
Publication date: 1989-08-24

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例を示すブロツク線
図、第２図は被制御機器である屋外放送装置の他
の実施例を示すブロツク線図である。図面において、１は制御部、２，１２はアンテ
ナ、３は送信部、４はマイクロホン、５はトーン
発振部、６，１５はＣＰＵ、７はキーボード、１
１は屋外放送装置、１３は受信部、１４はスケル
チ回路、１６は音量調整部、１７はスピーカ、２
１はアナログスイツチ、２２はメインアンプ、２
３は電力増幅部、２４は抵抗、２５はプリアンプ
である。 FIG. 1 is a block diagram showing one embodiment of this invention, and FIG. 2 is a block diagram showing another embodiment of an outdoor broadcasting device which is a controlled device. In the drawing, 1 is a control unit, 2 and 12 are antennas, 3 is a transmission unit, 4 is a microphone, 5 is a tone oscillation unit, 6 and 15 are CPUs, 7 is a keyboard, 1
1 is an outdoor broadcasting device, 13 is a receiving section, 14 is a squelch circuit, 16 is a volume adjustment section, 17 is a speaker, 2
1 is the analog switch, 22 is the main amplifier, 2
3 is a power amplification section, 24 is a resistor, and 25 is a preamplifier.

Claims

[Claims for Utility Model Registration] (1) A coded digital radio signal transmitted from a master station turns on a broadcasting device that is a slave station located in a remote area, and then broadcasts outdoors to that area;
In the radio broadcasting device, which transmits a coded end signal as a digital radio signal to the broadcasting device to turn off the broadcasting device when the broadcast ends, the master station includes a squelch signal generating section that emits a tone squelch signal, and a squelch signal generating section that emits a tone squelch signal, and a squelch signal generator that emits a tone squelch signal, and The broadcasting device includes a control unit that controls the squelch signal generation unit to operate when transmitting the end signal of the signal, and the broadcasting device includes a squelch circuit that outputs a control signal upon receiving the tone squelch signal, and a squelch circuit that outputs a control signal upon receiving the tone squelch signal. 1. A termination signal processing device for a radio broadcasting device, comprising: a control section that controls a volume adjustment section so as to lower the volume of audio output. (2) The control unit of the master station transmits the tone squelch signal prior to transmitting the end signal of the digital radio signal, and controls the transmission to stop when transmission of the end signal of the digital radio signal ends. The end signal processing device for a radio broadcasting device according to claim 1. (3) The termination signal processing device for a radio broadcasting device according to claim 1 or 2, wherein the control section of the broadcasting device controls a volume adjustment section and also controls the operation of a loudspeaker to be turned off. . (4) The broadcasting device includes an analog switch controlled by the output of the squelch circuit, and the analog switch lowers the amplification degree of the power amplifier when receiving the tone squelch signal. An end signal processing device for a radio broadcasting device according to any one of claims 1 to 3.