JPS5518105A - Alarm signal generator - Google Patents

Alarm signal generator

Info

Publication number
JPS5518105A
JPS5518105A JP8996678A JP8996678A JPS5518105A JP S5518105 A JPS5518105 A JP S5518105A JP 8996678 A JP8996678 A JP 8996678A JP 8996678 A JP8996678 A JP 8996678A JP S5518105 A JPS5518105 A JP S5518105A
Authority
JP
Japan
Prior art keywords
cycle
signal
circuit
alarm
function 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.)
Pending
Application number
JP8996678A
Other languages
Japanese (ja)
Inventor
Chuji Tokunaga
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 JP8996678A priority Critical patent/JPS5518105A/en
Publication of JPS5518105A publication Critical patent/JPS5518105A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Manipulation Of Pulses (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:To obtain the alarm signal generator which can generate the alarm in case the fluctuation value of the signal in the transmission line of the cycle function signal becomes outside the range of the prescribed level. CONSTITUTION:The cycle function signal of repetitive cycle T is supplied to reference pulse generation circuit 9 as well as to window comparator 7 via input terminal 1. Circuit 9 is controlled so that the pulse may be synchronized with the maximum voltage level of the input signal with the repetitive cycle identical to cycle T of the input signal. The output of both comparator 7 and circuit 9 are supplied to monostable multivibrator 10 which is capable of retrigger with pulse duration Tc set a little longer than repetitive cycle T of the cycle function signal. When the fluctuation value of the cycle function signal becomes outside the range of the prescribed level, the output of logic product circuit 8 becomes ''0'' and multivibrator 10 displays alarm (ALM).
JP8996678A 1978-07-25 1978-07-25 Alarm signal generator Pending JPS5518105A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8996678A JPS5518105A (en) 1978-07-25 1978-07-25 Alarm signal generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8996678A JPS5518105A (en) 1978-07-25 1978-07-25 Alarm signal generator

Publications (1)

Publication Number Publication Date
JPS5518105A true JPS5518105A (en) 1980-02-08

Family

ID=13985418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8996678A Pending JPS5518105A (en) 1978-07-25 1978-07-25 Alarm signal generator

Country Status (1)

Country Link
JP (1) JPS5518105A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51146209A (en) * 1975-06-10 1976-12-15 Fujitsu Ltd System for regenerating signal
JPS5239333A (en) * 1975-09-25 1977-03-26 Hitachi Ltd Read-out clock miss extraction circuit

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51146209A (en) * 1975-06-10 1976-12-15 Fujitsu Ltd System for regenerating signal
JPS5239333A (en) * 1975-09-25 1977-03-26 Hitachi Ltd Read-out clock miss extraction circuit

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