GB521720A - Improvements in and relating to carrier wave signalling systems - Google Patents

Improvements in and relating to carrier wave signalling systems

Info

Publication number
GB521720A
GB521720A GB34164/38A GB3416438A GB521720A GB 521720 A GB521720 A GB 521720A GB 34164/38 A GB34164/38 A GB 34164/38A GB 3416438 A GB3416438 A GB 3416438A GB 521720 A GB521720 A GB 521720A
Authority
GB
United Kingdom
Prior art keywords
band
carriers
carrier
pairs
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.)
Expired
Application number
GB34164/38A
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.)
Wired Radio Inc
Original Assignee
Wired Radio Inc
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 Wired Radio Inc filed Critical Wired Radio Inc
Publication of GB521720A publication Critical patent/GB521720A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03C—MODULATION
    • H03C1/00—Amplitude modulation
    • H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/06—Arrangements for supplying the carrier waves ; Arrangements for supplying synchronisation signals
    • H04J1/065—Synchronisation of carrier sources at the receiving station with the carrier source at the transmitting station

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Circuits Of Receivers In General (AREA)
  • Noise Elimination (AREA)

Abstract

521,720. Distributing music. WIRED RADIO, Inc. Nov. 24, 1938, No. 34164. Convention date, Dec. 21, 1937. [Class 40 (iv)] [Also in Group XL] In a system in which different programmes are transmitted over, e.g. a power line 25 on carriers A ... E arranged in pairs as shown in Fig. 3 so that the space between the carriers of a pair is occupied by the upper side-band of the lower carrier and the lower sideband of the upper carrier whilst the space between two pairs'is not less than the width of a side-band and is free of signals, the receiving arrangement comprises a broadlytuned circuit 30 passing a band represented by curve 33, Fig. 3, a mixing amplifier 35 fed with replacement carriers from a source 36, a second broadly-tuned circuit 31, an average type linear detector 40 the load 39 of which is not bypassed and which effectively detects only, signals from the selected carrier and a tuned circuit 42'in the audio-frequency output which passes only a band (45, Fig. 3) corresponding to the width of a side-band. The carriers A ... E are harmonics of a basic frequency of 10 kc. and are impressed on the transmission medium in the manner described in Specification 520,074. Specification 481,962, [Group XL], also is referred to.
GB34164/38A 1937-12-21 1938-11-24 Improvements in and relating to carrier wave signalling systems Expired GB521720A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US180971A US2188499A (en) 1937-12-21 1937-12-21 Staggered frequency signal distribution

Publications (1)

Publication Number Publication Date
GB521720A true GB521720A (en) 1940-05-29

Family

ID=22662357

Family Applications (3)

Application Number Title Priority Date Filing Date
GB34164/38A Expired GB521720A (en) 1937-12-21 1938-11-24 Improvements in and relating to carrier wave signalling systems
GB34165/38A Expired GB521721A (en) 1937-12-21 1938-11-24 Improvements in and relating to carrier wave signalling systems
GB35801/38A Expired GB522429A (en) 1937-12-21 1938-12-08 Improvements in and relating to carrier wave signalling systems

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB34165/38A Expired GB521721A (en) 1937-12-21 1938-11-24 Improvements in and relating to carrier wave signalling systems
GB35801/38A Expired GB522429A (en) 1937-12-21 1938-12-08 Improvements in and relating to carrier wave signalling systems

Country Status (2)

Country Link
US (1) US2188499A (en)
GB (3) GB521720A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580903A (en) * 1947-06-02 1952-01-01 Rca Corp Color television system
US3517131A (en) * 1967-04-10 1970-06-23 Bell Telephone Labor Inc System for superimposing individual channel spectra in a noninterfering manner

Also Published As

Publication number Publication date
GB522429A (en) 1940-06-18
US2188499A (en) 1940-01-30
GB521721A (en) 1940-05-29

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