JPS5752244A - Transmission system - Google Patents

Transmission system

Info

Publication number
JPS5752244A
JPS5752244A JP12676180A JP12676180A JPS5752244A JP S5752244 A JPS5752244 A JP S5752244A JP 12676180 A JP12676180 A JP 12676180A JP 12676180 A JP12676180 A JP 12676180A JP S5752244 A JPS5752244 A JP S5752244A
Authority
JP
Japan
Prior art keywords
circuit
pulse
plural
transmitter
signals
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
JP12676180A
Other languages
Japanese (ja)
Inventor
Kuniharu Tatezuki
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP12676180A priority Critical patent/JPS5752244A/en
Publication of JPS5752244A publication Critical patent/JPS5752244A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To discriminate transmission signals by a common receiver even if plural transmitters transmit signals at the same time, by sending out transmission signals intermittently by mutually different periods from plural transmitters. CONSTITUTION:When a push button 2 is pushed, plural transmitters A1-A4 generate a pulse P6 from a monostable circuit 3, make a transistor TR8 conductive, supply the power to an astable circuit 4, generate a pulse P7 from the circuit 4, and operate a modulating circuit 5 by the pulse P7 through a TR9. The circuit 5 generates intermittently plural frequency signals, modulates a carrier wave from an oscillator 6 through a TR10, drives an antenna circuit through a TR11, and sends out radio waves. A period T8 of the pulse P7 from the circuit 4 is different in each transmitter, and also a time combination of plural modulation signals of the circuit 5 is made different in each transmitter, when the transmission is executed. Accordingly, even if each transmitter sends out radio waves at the same time, a common receiver B detects a period of a pulse P and combination of modulation signals which are sent out from each transmitter, and displays indicators a1-a4 corresponding to the transmitters separately.
JP12676180A 1980-09-11 1980-09-11 Transmission system Pending JPS5752244A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12676180A JPS5752244A (en) 1980-09-11 1980-09-11 Transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12676180A JPS5752244A (en) 1980-09-11 1980-09-11 Transmission system

Publications (1)

Publication Number Publication Date
JPS5752244A true JPS5752244A (en) 1982-03-27

Family

ID=14943262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12676180A Pending JPS5752244A (en) 1980-09-11 1980-09-11 Transmission system

Country Status (1)

Country Link
JP (1) JPS5752244A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531587A1 (en) * 1982-08-03 1984-02-10 Morey Gilles METHOD FOR TRANSMITTING INFORMATION ON A SINGLE CHANGES CHANNEL AND APPLYING SAID METHOD IN PARTICULAR TO DEVICES FORMING AN ALARM SYSTEM
JPS5999828A (en) * 1982-11-29 1984-06-08 Kokusai Electric Co Ltd Method and device for communicating rescue for disaster

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54109714A (en) * 1978-01-18 1979-08-28 Compur Electronic Gmbh Method of and device for transmitting numerous information signals in one common carrier frequency area from various transmitters to one receiver

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54109714A (en) * 1978-01-18 1979-08-28 Compur Electronic Gmbh Method of and device for transmitting numerous information signals in one common carrier frequency area from various transmitters to one receiver

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531587A1 (en) * 1982-08-03 1984-02-10 Morey Gilles METHOD FOR TRANSMITTING INFORMATION ON A SINGLE CHANGES CHANNEL AND APPLYING SAID METHOD IN PARTICULAR TO DEVICES FORMING AN ALARM SYSTEM
JPS5999828A (en) * 1982-11-29 1984-06-08 Kokusai Electric Co Ltd Method and device for communicating rescue for disaster
JPH0345938B2 (en) * 1982-11-29 1991-07-12 Kokusai Electric Co Ltd

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