JPS5595434A - Measurement system for deterioration of repeater characteristics - Google Patents

Measurement system for deterioration of repeater characteristics

Info

Publication number
JPS5595434A
JPS5595434A JP263379A JP263379A JPS5595434A JP S5595434 A JPS5595434 A JP S5595434A JP 263379 A JP263379 A JP 263379A JP 263379 A JP263379 A JP 263379A JP S5595434 A JPS5595434 A JP S5595434A
Authority
JP
Japan
Prior art keywords
unit
terminal
transmission line
control channel
converted
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
JP263379A
Other languages
Japanese (ja)
Inventor
Toshie Takatake
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 JP263379A priority Critical patent/JPS5595434A/en
Publication of JPS5595434A publication Critical patent/JPS5595434A/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

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 make it possible to measure characteristics of a repeater without using an expensive special measurer and measuring return line, by adding a simple function to a central unit and terminal unit constituting a doubled loop data transmission line. CONSTITUTION:Central unit 1 which controls a time-division channel on doubled loop data transmission line 3 and a control channel, and terminal unit 2 with an equipped data terminal are provided and when characteristics of a ''0'' system are measured, by-pass switch 28 of unit 2 is set the (b) side from operation board 18 of unit 1 through control channel 16. Further, a measurement pattern is inserted into transmission line 3 of the ''0'' system by placing measurement pattern insertion selection switch 11 of unit 1 at the (a) side and then applied to bipolar signal driver 24 of terminal office 2. Then, the pattern is converted by level signal converting method 22 into a DC level signal, which is converted into a digital code by digital code information converting method 23, and the converted digital code is applied to control channel 27 for a measurement of characteristics of a repeater.
JP263379A 1979-01-12 1979-01-12 Measurement system for deterioration of repeater characteristics Pending JPS5595434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP263379A JPS5595434A (en) 1979-01-12 1979-01-12 Measurement system for deterioration of repeater characteristics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP263379A JPS5595434A (en) 1979-01-12 1979-01-12 Measurement system for deterioration of repeater characteristics

Publications (1)

Publication Number Publication Date
JPS5595434A true JPS5595434A (en) 1980-07-19

Family

ID=11534785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP263379A Pending JPS5595434A (en) 1979-01-12 1979-01-12 Measurement system for deterioration of repeater characteristics

Country Status (1)

Country Link
JP (1) JPS5595434A (en)

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