JPS5644291A - Multichannel radio control device - Google Patents

Multichannel radio control device

Info

Publication number
JPS5644291A
JPS5644291A JP12043579A JP12043579A JPS5644291A JP S5644291 A JPS5644291 A JP S5644291A JP 12043579 A JP12043579 A JP 12043579A JP 12043579 A JP12043579 A JP 12043579A JP S5644291 A JPS5644291 A JP S5644291A
Authority
JP
Japan
Prior art keywords
tone
signal
fixed
control device
automatic gain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12043579A
Other languages
Japanese (ja)
Inventor
Hiroshi Oota
Koji Kakimoto
Hiroshi Okada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokyo Keiki Inc
Original Assignee
Tokyo Keiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokyo Keiki Co Ltd filed Critical Tokyo Keiki Co Ltd
Priority to JP12043579A priority Critical patent/JPS5644291A/en
Publication of JPS5644291A publication Critical patent/JPS5644291A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/12—Electric signal transmission systems in which the signal transmitted is frequency or phase of ac

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To perform always stable communication, by making frequency deviation fixed independently of the number of channels in the transmission side and by making the receiving signal level fixed in the receiving side, in the multichannel radio control device using the tone signal as the transmission signal of remote control. CONSTITUTION:In the transmitter, automatic gain limiter 31, tone amplifier 32, and automatic gain control amplifier 33 constitute an automatic gain control device for tone signal. Control is so performed that the peak-to-peak value of the amplitude of the synthesized modulation wave of the f1 or fn tone signal may be always fixed even if the f1 or fn oscillator is operated simultaneously, and the synthesized modulation wave above is applied to modulation amplifier 7 to make frequency deviation of frequency modulator 3 fixed independently of the number of input channels. Meanwhile, in the receiving side, outputs of amplifiers 40, 42, and 44 are controlled by AGC unit 25 for tone to be always fixed; and if the input signal becomes a limit value or less, level set amplifiers 41, 43 and 45 eliminate it. As a result, stable communication is possible independently of the number of channels and the receiving signal level.
JP12043579A 1979-09-19 1979-09-19 Multichannel radio control device Pending JPS5644291A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12043579A JPS5644291A (en) 1979-09-19 1979-09-19 Multichannel radio control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12043579A JPS5644291A (en) 1979-09-19 1979-09-19 Multichannel radio control device

Publications (1)

Publication Number Publication Date
JPS5644291A true JPS5644291A (en) 1981-04-23

Family

ID=14786132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12043579A Pending JPS5644291A (en) 1979-09-19 1979-09-19 Multichannel radio control device

Country Status (1)

Country Link
JP (1) JPS5644291A (en)

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