JPS54119818A - Monitor for receivers - Google Patents

Monitor for receivers

Info

Publication number
JPS54119818A
JPS54119818A JP2731978A JP2731978A JPS54119818A JP S54119818 A JPS54119818 A JP S54119818A JP 2731978 A JP2731978 A JP 2731978A JP 2731978 A JP2731978 A JP 2731978A JP S54119818 A JPS54119818 A JP S54119818A
Authority
JP
Japan
Prior art keywords
receiver
circuit
output
signal
time
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.)
Granted
Application number
JP2731978A
Other languages
Japanese (ja)
Other versions
JPS6053932B2 (en
Inventor
Kiyoshi Oota
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP53027319A priority Critical patent/JPS6053932B2/en
Publication of JPS54119818A publication Critical patent/JPS54119818A/en
Publication of JPS6053932B2 publication Critical patent/JPS6053932B2/en
Expired 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

Abstract

PURPOSE:To enable to discover the failure at the time other than the maintenance and inspection of receivers and periodical inspection, by monitoring the conditions of the receiver at normal waiting time of the receiver performing radio communication, and displaying the noramlity in the receiver after judgement or informing it to outside the receiver. CONSTITUTION:In the receiver performing radio communication with the transmitter emitting electromagnetic waves only at communication, the oscillation circuit 12 oscillating the signal having the frequency corresponding to the reception frequency of the receiver is connected to the mixing circuit 11, and the oscillation circuit 12 is controlled with the control circuit 13 inputting the signal at an arbitrary time when the receiver at the control input terminal 16 is in waiting condition. Further, the electromagnetic wave detection circuit 9 detecting the output of the frequency discrimination circuit 6 receiving from the oscillation circuit 12 is provided, and the comparison circuit 14 comparing the output of the detection circuit 9 with the control signal fed to the terminal 16 is provided, allowing the output of the comparison circuit 14 to monitor the receiver in waiting condition normally.
JP53027319A 1978-03-09 1978-03-09 receiver monitoring device Expired JPS6053932B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53027319A JPS6053932B2 (en) 1978-03-09 1978-03-09 receiver monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53027319A JPS6053932B2 (en) 1978-03-09 1978-03-09 receiver monitoring device

Publications (2)

Publication Number Publication Date
JPS54119818A true JPS54119818A (en) 1979-09-18
JPS6053932B2 JPS6053932B2 (en) 1985-11-28

Family

ID=12217752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53027319A Expired JPS6053932B2 (en) 1978-03-09 1978-03-09 receiver monitoring device

Country Status (1)

Country Link
JP (1) JPS6053932B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174036A (en) * 1983-03-24 1984-10-02 Nec Corp Receiving device
JPS6237464U (en) * 1985-08-26 1987-03-05
JPS62294343A (en) * 1986-06-13 1987-12-21 Nec Corp Receiver with self-diagnosing function

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59174036A (en) * 1983-03-24 1984-10-02 Nec Corp Receiving device
JPS6237464U (en) * 1985-08-26 1987-03-05
JPS62294343A (en) * 1986-06-13 1987-12-21 Nec Corp Receiver with self-diagnosing function
JPH0547138B2 (en) * 1986-06-13 1993-07-15 Nippon Electric Co

Also Published As

Publication number Publication date
JPS6053932B2 (en) 1985-11-28

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