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JPS57170640A - Receiver having self-diagnosing function - Google Patents

Receiver having self-diagnosing function

Info

Publication number
JPS57170640A
JPS57170640A JP56055051A JP5505181A JPS57170640A JP S57170640 A JPS57170640 A JP S57170640A JP 56055051 A JP56055051 A JP 56055051A JP 5505181 A JP5505181 A JP 5505181A JP S57170640 A JPS57170640 A JP S57170640A
Authority
JP
Japan
Prior art keywords
noise
receiver
frequency amplifier
circuit
received signal
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
JP56055051A
Other languages
Japanese (ja)
Other versions
JPS6232662B2 (en
Inventor
Masashi Tanaka
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 JP56055051A priority Critical patent/JPS57170640A/en
Publication of JPS57170640A publication Critical patent/JPS57170640A/en
Publication of JPS6232662B2 publication Critical patent/JPS6232662B2/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)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)

Abstract

PURPOSE:To easily discriminate the occurrence of a fault of a receiver itself even in the wait state of a received signal by supplying a noise of a reception frequency band to the input side of the receiver when there is no arrival received signal, and monitoring the output state. CONSTITUTION:When the absence of an arrival received signal is detected by a monitoring circuit 15, a control circuit 16 drives a repetitive noise generating circuit 17 and a switch circuit 14 for a short time. The noise generating circuit 17 supplies a noise of a reception frequency band to the input side of a receiver through the closed switch circuit 14. This noise input is supplied to a demodulator 7 through a high frequency amplifier 1, a frequency converter 3, an amplifier 4, a filter 5, and an intermediate frequency amplifier 6. Then, a monitoring circuit 15 detects the noise from the intermediate stage of the intermediate frequency amplifier 6 and monitors its level to check the presence of a fault between the high frequency amplifier 1 and intermediate frequency amplifier 6 even in a reception wait state.
JP56055051A 1981-04-14 1981-04-14 Receiver having self-diagnosing function Granted JPS57170640A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56055051A JPS57170640A (en) 1981-04-14 1981-04-14 Receiver having self-diagnosing function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56055051A JPS57170640A (en) 1981-04-14 1981-04-14 Receiver having self-diagnosing function

Publications (2)

Publication Number Publication Date
JPS57170640A true JPS57170640A (en) 1982-10-20
JPS6232662B2 JPS6232662B2 (en) 1987-07-16

Family

ID=12987869

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56055051A Granted JPS57170640A (en) 1981-04-14 1981-04-14 Receiver having self-diagnosing function

Country Status (1)

Country Link
JP (1) JPS57170640A (en)

Cited By (5)

* 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
JPS6392443U (en) * 1986-12-04 1988-06-15
JPH0198327A (en) * 1987-10-09 1989-04-17 Furuno Electric Co Ltd Signal receiver
US4984293A (en) * 1989-10-17 1991-01-08 Rockwell International Corporation Multi-channel microwave receiver having self-test capability
CN108351619A (en) * 2015-11-09 2018-07-31 奥的斯电梯公司 self-diagnostic circuit

Cited By (5)

* 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
JPS6392443U (en) * 1986-12-04 1988-06-15
JPH0198327A (en) * 1987-10-09 1989-04-17 Furuno Electric Co Ltd Signal receiver
US4984293A (en) * 1989-10-17 1991-01-08 Rockwell International Corporation Multi-channel microwave receiver having self-test capability
CN108351619A (en) * 2015-11-09 2018-07-31 奥的斯电梯公司 self-diagnostic circuit

Also Published As

Publication number Publication date
JPS6232662B2 (en) 1987-07-16

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