JPS57178429A - Interior receiver of radio fixed system for local administration for prevention of disaster - Google Patents

Interior receiver of radio fixed system for local administration for prevention of disaster

Info

Publication number
JPS57178429A
JPS57178429A JP6237981A JP6237981A JPS57178429A JP S57178429 A JPS57178429 A JP S57178429A JP 6237981 A JP6237981 A JP 6237981A JP 6237981 A JP6237981 A JP 6237981A JP S57178429 A JPS57178429 A JP S57178429A
Authority
JP
Japan
Prior art keywords
radio wave
output
reception
call signal
disaster
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
JP6237981A
Other languages
Japanese (ja)
Inventor
Masahiko Hayashi
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP6237981A priority Critical patent/JPS57178429A/en
Publication of JPS57178429A publication Critical patent/JPS57178429A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/091—Traffic information broadcasting
    • G08G1/094—Hardware aspects; Signal processing or signal properties, e.g. frequency bands

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To easily judge the propriety of an installation place, by providing a reception condition pilot lampwhich flashes in the reception of a radio wave. CONSTITUTION:A radio wave arriving through an antenna 1 is demodulated by a reception part 2. It demodulation output is supplied to a selective calling part 3 to detect a selective call signal. When a selective call signal addressed to its station is detected, the output of the reception part 2 is connected to a speaker 4. At this time, when the radio wave is received, the reception part 2 outputs a DC voltage discriminated from that when no radio wave is received, namely, a squelch voltage signal to an output line 9 without reference to the presence of the selctive call signal. On receiving the squelch voltage signal from the output line 9, a low frequency oscillating circuit 7 starts oscillation and supplies its output to a light emitting diode 6, which flashes.
JP6237981A 1981-04-27 1981-04-27 Interior receiver of radio fixed system for local administration for prevention of disaster Pending JPS57178429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6237981A JPS57178429A (en) 1981-04-27 1981-04-27 Interior receiver of radio fixed system for local administration for prevention of disaster

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6237981A JPS57178429A (en) 1981-04-27 1981-04-27 Interior receiver of radio fixed system for local administration for prevention of disaster

Publications (1)

Publication Number Publication Date
JPS57178429A true JPS57178429A (en) 1982-11-02

Family

ID=13198417

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6237981A Pending JPS57178429A (en) 1981-04-27 1981-04-27 Interior receiver of radio fixed system for local administration for prevention of disaster

Country Status (1)

Country Link
JP (1) JPS57178429A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11397386B2 (en) * 2019-05-13 2022-07-26 Canon Kabushiki Kaisha Toner and toner manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11397386B2 (en) * 2019-05-13 2022-07-26 Canon Kabushiki Kaisha Toner and toner manufacturing method

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