GB728388A - Improvements in or relating to multi-channel communication systems - Google Patents

Improvements in or relating to multi-channel communication systems

Info

Publication number
GB728388A
GB728388A GB2402251A GB2402251A GB728388A GB 728388 A GB728388 A GB 728388A GB 2402251 A GB2402251 A GB 2402251A GB 2402251 A GB2402251 A GB 2402251A GB 728388 A GB728388 A GB 728388A
Authority
GB
United Kingdom
Prior art keywords
channel
pass filter
oct
relating
communication systems
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
GB2402251A
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.)
General Electric Co PLC
Original Assignee
General Electric Co 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 General Electric Co PLC filed Critical General Electric Co PLC
Priority to GB2402251A priority Critical patent/GB728388A/en
Publication of GB728388A publication Critical patent/GB728388A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/04—Frequency-transposition arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/18—Frequency-division multiplex systems in which all the carriers are amplitude-modulated

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radio Relay Systems (AREA)

Abstract

728,388. Multiplex systems. GENERAL ELECTRIC CO., Ltd., and HEAD, N. E. Oct. 15, 1952 [Oct. 15, 1951], No. 24022/51. Class 40(4). In a frequency-division multiplex transmission system, supervisory signals in connection with one channel are transmitted by means of the carrier frequency proper to an adjacent channel. Oscillator 13, Fig. 2, which generates the carrier frequency 13.2 kc./s. for channel 3 has its output coupled to the transmission medium through a switch 15 which is controlled by the signalling currents of channel 2, and the upper side-band of the 9.5 k/cs. channel No. 2 carrier is received together with the 132 kc/s. signal by a band pass filter 21, Fig. 3. The speech and signalling currents are selected after demodulation by low pass filter 24 and band pass filter 26 respectively. Suitable levels for the prevention of cross-talk and false actuation of the signal receiver are also given.
GB2402251A 1951-10-15 1951-10-15 Improvements in or relating to multi-channel communication systems Expired GB728388A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2402251A GB728388A (en) 1951-10-15 1951-10-15 Improvements in or relating to multi-channel communication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2402251A GB728388A (en) 1951-10-15 1951-10-15 Improvements in or relating to multi-channel communication systems

Publications (1)

Publication Number Publication Date
GB728388A true GB728388A (en) 1955-04-20

Family

ID=10205133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2402251A Expired GB728388A (en) 1951-10-15 1951-10-15 Improvements in or relating to multi-channel communication systems

Country Status (1)

Country Link
GB (1) GB728388A (en)

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