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GB466071A - High frequency wave electrical signalling systems - Google Patents

High frequency wave electrical signalling systems

Info

Publication number
GB466071A
GB466071A GB16507/36A GB1650736A GB466071A GB 466071 A GB466071 A GB 466071A GB 16507/36 A GB16507/36 A GB 16507/36A GB 1650736 A GB1650736 A GB 1650736A GB 466071 A GB466071 A GB 466071A
Authority
GB
United Kingdom
Prior art keywords
band
signals
shifted
frequency
regions
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
GB16507/36A
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
Publication of GB466071A publication Critical patent/GB466071A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems

Landscapes

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

Abstract

466,071. High-frequency transmission. STANDARD TELEPHONES & CABLES, Ltd. June 12, 1936, No. 16507. Convention date, Sept. 18, 1935. Drawings to Specification. [Class 40 (iv)] [Also in Group XL] In the transmission of signals covering a wide frequency band such as 0 .. 2000 Kc., the. lower part of the band (say) 0 .. 300 Kc. is shifted to a position above the highest frequency in the original band. Where, as in television, the energy of the signals is concentrated in regions centred on harmonics of a base frequency, the intervening regions being void of useful signals, the point of division between the shifted and unshifted ports of the band is put in one of the void regions. At the receiving end the shifted band may be passed through a phase corrector before being restored to its original position. Alternatively an anticipatory correction is applied at the sending end. The invention is useful in the distribution of television signals over a network of co-axial distribution cables including amplifying sub-distributing stations in which a single amplifier feeds several branch lines. The feeders connected to the terminal apparatus may be associated with the main cable by transformers or by direct con. nection.
GB16507/36A 1935-09-18 1936-06-12 High frequency wave electrical signalling systems Expired GB466071A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR767711X 1935-09-18

Publications (1)

Publication Number Publication Date
GB466071A true GB466071A (en) 1937-05-21

Family

ID=9183897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16507/36A Expired GB466071A (en) 1935-09-18 1936-06-12 High frequency wave electrical signalling systems

Country Status (4)

Country Link
DE (1) DE767711C (en)
FR (1) FR806769A (en)
GB (1) GB466071A (en)
NL (1) NL47917C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455959A (en) * 1941-04-03 1948-12-14 Hartford Nat Bank & Trust Co Device for the transmission of signals by means of frequency-modulated carrier waves
DE763148C (en) * 1937-10-26 1954-08-02 Telefunken Gmbh Arrangement for carrier frequency transmission of a television frequency band which also contains very low frequencies

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1770205A (en) * 1929-03-25 1930-07-08 Rca Corp Television system
CH151050A (en) * 1929-05-23 1931-11-30 Bell Telephone Mfg High-frequency telecommunication transmission system.
US1841142A (en) * 1930-11-21 1932-01-12 Bell Telephone Labor Inc Wave communication system
USRE20700E (en) * 1931-12-26 1938-04-19 Detector
AT141448B (en) * 1933-07-28 1935-04-25 Telefunken Gmbh Procedure for television broadcasting with simultaneous transmission of picture and sound.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763148C (en) * 1937-10-26 1954-08-02 Telefunken Gmbh Arrangement for carrier frequency transmission of a television frequency band which also contains very low frequencies
US2455959A (en) * 1941-04-03 1948-12-14 Hartford Nat Bank & Trust Co Device for the transmission of signals by means of frequency-modulated carrier waves

Also Published As

Publication number Publication date
DE767711C (en) 1953-04-09
NL47917C (en)
FR806769A (en) 1936-12-24

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