JPS5795734A - Method for automatic inspection of multiple radio loud speaker receiving station - Google Patents

Method for automatic inspection of multiple radio loud speaker receiving station

Info

Publication number
JPS5795734A
JPS5795734A JP55172311A JP17231180A JPS5795734A JP S5795734 A JPS5795734 A JP S5795734A JP 55172311 A JP55172311 A JP 55172311A JP 17231180 A JP17231180 A JP 17231180A JP S5795734 A JPS5795734 A JP S5795734A
Authority
JP
Japan
Prior art keywords
receiving station
inspection
command signal
frequency
decoder
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
JP55172311A
Other languages
Japanese (ja)
Inventor
Mikio Nakagawa
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP55172311A priority Critical patent/JPS5795734A/en
Publication of JPS5795734A publication Critical patent/JPS5795734A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To perform automatically the inspection work for a multiple radio loud speaker receving station, by providing a transmitter, which transmits an inspection command signal, in the inspecting device and by tramsitting a prescribed signal with acoustic waves of an inaudible frequency from the receiving station when the receiving station detects the inspection command signal. CONSTITUTION:In case of inspection for a receiving station, an automatic inspecting device is brought near the receiving station, and a transmitter 21 is modulated by an inspection command signal generated from a signal generator 22, and radio waves of the same frequency as the receiving frequency of a receiver 11 are transmitted with a weak power for a short time. These radio waves are demodulated by the receiver 11 and are inputted to a switching circuit 12 and a decoder 13; and when the inspection command signal is detected by the decoder 13, the output of the circuit 12 is cut off, and coder 16 is started. The coder 16 controls the oscillation of the inaudible frequency of an oscillator 17 by coded inspection item information in the receiving station and amplifiers the inaudible frequency in 14 to transmit a code due to acoustic waves of the inaudible frequency from a speaker 15. These acoustic waves are received by a microphone 23 and are decoded to original information by a decoder 24 and are recorded on a recorder 25.
JP55172311A 1980-12-05 1980-12-05 Method for automatic inspection of multiple radio loud speaker receiving station Pending JPS5795734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55172311A JPS5795734A (en) 1980-12-05 1980-12-05 Method for automatic inspection of multiple radio loud speaker receiving station

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55172311A JPS5795734A (en) 1980-12-05 1980-12-05 Method for automatic inspection of multiple radio loud speaker receiving station

Publications (1)

Publication Number Publication Date
JPS5795734A true JPS5795734A (en) 1982-06-14

Family

ID=15939557

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55172311A Pending JPS5795734A (en) 1980-12-05 1980-12-05 Method for automatic inspection of multiple radio loud speaker receiving station

Country Status (1)

Country Link
JP (1) JPS5795734A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05290501A (en) * 1992-04-10 1993-11-05 Teac Corp Disk device
US5450624A (en) * 1993-01-07 1995-09-12 Ford Motor Company Method and apparatus for diagnosing amp to speaker connections
US5815584A (en) * 1996-11-08 1998-09-29 Ford Motor Company Automatic detection of shorted loudspeakers in automotive audio systems
FR2789540A1 (en) * 1999-02-05 2000-08-11 Andre Martinez Control method and unit for loudspeakers in sound system uses inaudible signals from emitter and loudspeaker to trigger visual or audio alert system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05290501A (en) * 1992-04-10 1993-11-05 Teac Corp Disk device
US5450624A (en) * 1993-01-07 1995-09-12 Ford Motor Company Method and apparatus for diagnosing amp to speaker connections
US5815584A (en) * 1996-11-08 1998-09-29 Ford Motor Company Automatic detection of shorted loudspeakers in automotive audio systems
FR2789540A1 (en) * 1999-02-05 2000-08-11 Andre Martinez Control method and unit for loudspeakers in sound system uses inaudible signals from emitter and loudspeaker to trigger visual or audio alert system

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