JPS575450A - Measuring system of difference between delay time - Google Patents

Measuring system of difference between delay time

Info

Publication number
JPS575450A
JPS575450A JP7908280A JP7908280A JPS575450A JP S575450 A JPS575450 A JP S575450A JP 7908280 A JP7908280 A JP 7908280A JP 7908280 A JP7908280 A JP 7908280A JP S575450 A JPS575450 A JP S575450A
Authority
JP
Japan
Prior art keywords
signal
difference
spare lines
present
signals
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
JP7908280A
Other languages
Japanese (ja)
Inventor
Toshio Tomikawa
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 JP7908280A priority Critical patent/JPS575450A/en
Publication of JPS575450A publication Critical patent/JPS575450A/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
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

PURPOSE:To minimize bit errors produced at line switching, by making accurate measurement of delay time difference without interrupting base band signal, in a microwave communication line in the present use having spare lines. CONSTITUTION:A signal voltage Vd for group delay measurement outputted from a transmission section 35 is applied to a hybrid circuit 34 under the condition of equation (1) and it is restored to the original signal at the reception side via present or spare lines. In this case, the signal is subject to phase shift due to the difference of present and spare lines. These signals are alternately switched at a selector switch 15 so that the relation of equations (6) and (7) (where; A is the amplitude of signal, omegad is angular frequency for group delay measuring signal, and t is time) can be satisfied, and the phase difference of the both signals is detected and displayed at the reception section 36 of the microwave link analyzer via a BPF 33.
JP7908280A 1980-06-13 1980-06-13 Measuring system of difference between delay time Pending JPS575450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7908280A JPS575450A (en) 1980-06-13 1980-06-13 Measuring system of difference between delay time

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7908280A JPS575450A (en) 1980-06-13 1980-06-13 Measuring system of difference between delay time

Publications (1)

Publication Number Publication Date
JPS575450A true JPS575450A (en) 1982-01-12

Family

ID=13679961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7908280A Pending JPS575450A (en) 1980-06-13 1980-06-13 Measuring system of difference between delay time

Country Status (1)

Country Link
JP (1) JPS575450A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020217388A1 (en) * 2019-04-25 2020-10-29 三菱電機株式会社 Phase-synchronizing circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020217388A1 (en) * 2019-04-25 2020-10-29 三菱電機株式会社 Phase-synchronizing circuit

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