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JPS57170639A - Receiver having self-diagnosing function - Google Patents

Receiver having self-diagnosing function

Info

Publication number
JPS57170639A
JPS57170639A JP56055050A JP5505081A JPS57170639A JP S57170639 A JPS57170639 A JP S57170639A JP 56055050 A JP56055050 A JP 56055050A JP 5505081 A JP5505081 A JP 5505081A JP S57170639 A JPS57170639 A JP S57170639A
Authority
JP
Japan
Prior art keywords
intermediate frequency
frequency signal
receiver
signal
detector
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
JP56055050A
Other languages
Japanese (ja)
Other versions
JPS6232661B2 (en
Inventor
Kyoji Watanabe
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 JP56055050A priority Critical patent/JPS57170639A/en
Publication of JPS57170639A publication Critical patent/JPS57170639A/en
Publication of JPS6232661B2 publication Critical patent/JPS6232661B2/ja
Granted 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)
  • Superheterodyne Receivers (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To diagnose a fault even in the wait mode of a received signal by supplying a signal of an image frequency to an intermediate frequency converter as a substitute for a reception input, and then detecting the presence of an intermediate frequency signal in said state. CONSTITUTION:When a detector 8 does not detect any intermediate frequency signal, a controller 9 closes a switch 4 for a certain time to supply an image frequency signal from an image frequency signal oscillator 5 to an intermediate frequency converter 7. When the detector 8 can not detect the intermediate frequency signal, a receiver itself is faulty and when the detector 8 detects the intermediate frequency signal, it is judged that the receiver is normal and there is no reception input.
JP56055050A 1981-04-14 1981-04-14 Receiver having self-diagnosing function Granted JPS57170639A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56055050A JPS57170639A (en) 1981-04-14 1981-04-14 Receiver having self-diagnosing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56055050A JPS57170639A (en) 1981-04-14 1981-04-14 Receiver having self-diagnosing function

Publications (2)

Publication Number Publication Date
JPS57170639A true JPS57170639A (en) 1982-10-20
JPS6232661B2 JPS6232661B2 (en) 1987-07-16

Family

ID=12987838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56055050A Granted JPS57170639A (en) 1981-04-14 1981-04-14 Receiver having self-diagnosing function

Country Status (1)

Country Link
JP (1) JPS57170639A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3740896A1 (en) * 1987-12-03 1989-06-15 Philips Patentverwaltung SPEAKERS, ESPECIALLY FOR A MOBILE RADIO

Also Published As

Publication number Publication date
JPS6232661B2 (en) 1987-07-16

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