JPS5485623A - Repeating amplifier - Google Patents

Repeating amplifier

Info

Publication number
JPS5485623A
JPS5485623A JP15391177A JP15391177A JPS5485623A JP S5485623 A JPS5485623 A JP S5485623A JP 15391177 A JP15391177 A JP 15391177A JP 15391177 A JP15391177 A JP 15391177A JP S5485623 A JPS5485623 A JP S5485623A
Authority
JP
Japan
Prior art keywords
oscillator
repeating
cable
amplifier
osc
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
JP15391177A
Other languages
Japanese (ja)
Inventor
Sukeyuki Uchida
Hideo Urata
Yoshihiko Nishimura
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 JP15391177A priority Critical patent/JPS5485623A/en
Publication of JPS5485623A publication Critical patent/JPS5485623A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H04B17/401—Monitoring; Testing of relay systems with selective localization
    • H04B17/402—Monitoring; Testing of relay systems with selective localization using different frequencies
    • H04B17/403—Monitoring; Testing of relay systems with selective localization using different frequencies generated by local oscillators

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

PURPOSE:To secure a constant coupling loss for the oscillator at the cable fault occurring time by coupling the monitoring oscillator output of each repeater in the submarine coaxial cable system to the signal system inside the repeating amplifier via the hybrid transformer, and thus to increase the accuracy of the faulty position search right near the amplifier. CONSTITUTION:In the group-based two-way submarine coaxial cable system using the single-line cable, the repeating amplifier contains monitor oscillator SV-OSC to perform the faulty area search in the case of the repeating transmission fault as well as to monitor the operation level of each repeater. Then the output of oscillator SV- OSC is connected in the repeating amplifier via hybrid transformer HYB-TR. The coupling loss is made constant for oscillator SV-OSC when the fault occurs in the cable right near the repeating amplifier. Thus, the effect given to the transmission characteristics can be deleted, and accordingly the searching accuracy can be increased at the cable fault occurring area.
JP15391177A 1977-12-20 1977-12-20 Repeating amplifier Pending JPS5485623A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15391177A JPS5485623A (en) 1977-12-20 1977-12-20 Repeating amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15391177A JPS5485623A (en) 1977-12-20 1977-12-20 Repeating amplifier

Publications (1)

Publication Number Publication Date
JPS5485623A true JPS5485623A (en) 1979-07-07

Family

ID=15572789

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15391177A Pending JPS5485623A (en) 1977-12-20 1977-12-20 Repeating amplifier

Country Status (1)

Country Link
JP (1) JPS5485623A (en)

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