GB283188A - Improvements in or relating to radio transmission systems - Google Patents

Improvements in or relating to radio transmission systems

Info

Publication number
GB283188A
GB283188A GB1465127A GB1465127A GB283188A GB 283188 A GB283188 A GB 283188A GB 1465127 A GB1465127 A GB 1465127A GB 1465127 A GB1465127 A GB 1465127A GB 283188 A GB283188 A GB 283188A
Authority
GB
United Kingdom
Prior art keywords
frequency
cable
limiting
control
employed
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
GB1465127A
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
C Lorenz AG
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
Priority claimed from DEL65710D external-priority patent/DE508898C/en
Application filed by Standard Elektrik Lorenz AG, C Lorenz AG filed Critical Standard Elektrik Lorenz AG
Publication of GB283188A publication Critical patent/GB283188A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/67—Common-wave systems, i.e. using separate transmitters operating on substantially the same frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

283,188. Lorenz Akt.-Ges., C. Jan. 7, 1927, [Convention date]. Addition to 270,273. Oscillation generators.-In a wireless broadcasting system of the kind described in the parent Specification, in which the frequency of a number of associated radiating stations is controlled by currents from a central station, the control currents are sent out at a frequency lower than the limiting frequency of the transmission cable employed. The limiting frequency is defined as the frequency beyond which the transmission of energy is impracticable owing to attenuation. In the case of an ordinary telephone cable, the limit is about 8,000 cycles per second, and with a loaded cable about 3,000 cycles per second. With a short transmission cable the control frequency is chosen fairly close to the limiting frequency, and with longer cables a lower control frequency is employed with a greater step-up in frequency at the radiating stations.
GB1465127A 1926-04-29 1927-05-31 Improvements in or relating to radio transmission systems Expired GB283188A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL65710D DE508898C (en) 1926-04-29 1926-04-29 Radio news distribution facility
DE283188X 1927-01-07

Publications (1)

Publication Number Publication Date
GB283188A true GB283188A (en) 1928-01-26

Family

ID=25775084

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1465127A Expired GB283188A (en) 1926-04-29 1927-05-31 Improvements in or relating to radio transmission systems

Country Status (2)

Country Link
FR (1) FR633316A (en)
GB (1) GB283188A (en)

Also Published As

Publication number Publication date
FR633316A (en) 1928-01-27

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