GB528515A - Improvements in and relating to two-way electrical signal transmission systems - Google Patents

Improvements in and relating to two-way electrical signal transmission systems

Info

Publication number
GB528515A
GB528515A GB12787/39A GB1278739A GB528515A GB 528515 A GB528515 A GB 528515A GB 12787/39 A GB12787/39 A GB 12787/39A GB 1278739 A GB1278739 A GB 1278739A GB 528515 A GB528515 A GB 528515A
Authority
GB
United Kingdom
Prior art keywords
signal transmission
relating
electrical signal
transmission systems
balanced
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.)
Expired
Application number
GB12787/39A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB12787/39A priority Critical patent/GB528515A/en
Priority to FR865083D priority patent/FR865083A/en
Publication of GB528515A publication Critical patent/GB528515A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

528,515. Two-way repeaters. STANDARD TELEPHONES & CABLES, Ltd., and WALSH, R. April 28, 1939, No. 12787. Drawings to Specification. [Class 40 (iv)] In a system comprising a balanced twowire path the frequency range in which the singing point, i.e. the attenuation across the hybrid coil less 6 decibels, is greater than the line circuit attenuation but is too small for balanced two-wire working is used for signal transmission by arranging that adjacent channels the nominal frequency bands of which overlap are worked in opposite directions. The invention may be used for superimposing super-audible telegraph channels on a telephone circuit.
GB12787/39A 1939-04-28 1939-04-28 Improvements in and relating to two-way electrical signal transmission systems Expired GB528515A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB12787/39A GB528515A (en) 1939-04-28 1939-04-28 Improvements in and relating to two-way electrical signal transmission systems
FR865083D FR865083A (en) 1939-04-28 1940-04-20 Bilateral electrical signal transmission systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB865083X 1939-04-28
GB12787/39A GB528515A (en) 1939-04-28 1939-04-28 Improvements in and relating to two-way electrical signal transmission systems

Publications (1)

Publication Number Publication Date
GB528515A true GB528515A (en) 1940-10-31

Family

ID=34839924

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12787/39A Expired GB528515A (en) 1939-04-28 1939-04-28 Improvements in and relating to two-way electrical signal transmission systems

Country Status (2)

Country Link
FR (1) FR865083A (en)
GB (1) GB528515A (en)

Also Published As

Publication number Publication date
FR865083A (en) 1941-05-13

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