GB181514A - Improvements relating to high frequency cable telegraphy - Google Patents

Improvements relating to high frequency cable telegraphy

Info

Publication number
GB181514A
GB181514A GB913321A GB913321A GB181514A GB 181514 A GB181514 A GB 181514A GB 913321 A GB913321 A GB 913321A GB 913321 A GB913321 A GB 913321A GB 181514 A GB181514 A GB 181514A
Authority
GB
United Kingdom
Prior art keywords
valve
relay
circuit
receiving
frequency
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
GB913321A
Other languages
English (en)
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.)
DEUTSCHE TELEPHONWERKE GmbH
Original Assignee
DEUTSCHE TELEPHONWERKE GmbH
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 to FR532816D priority Critical patent/FR532816A/fr
Priority to DED37627D priority patent/DE385150C/de
Application filed by DEUTSCHE TELEPHONWERKE GmbH filed Critical DEUTSCHE TELEPHONWERKE GmbH
Priority to GB913321A priority patent/GB181514A/en
Publication of GB181514A publication Critical patent/GB181514A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2021—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change per symbol period is not constrained
    • H04L27/2025—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change per symbol period is not constrained in which the phase changes in a piecewise linear manner within each symbol period
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Selective Calling Equipment (AREA)
GB913321A 1920-05-22 1921-03-24 Improvements relating to high frequency cable telegraphy Expired GB181514A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR532816D FR532816A (enExample) 1921-03-24
DED37627D DE385150C (de) 1920-05-22 1920-05-22 Verfahren zur Hochfrequenztelegraphie mittels Interferenz auf der Fernleitung
GB913321A GB181514A (en) 1921-03-24 1921-03-24 Improvements relating to high frequency cable telegraphy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB913321A GB181514A (en) 1921-03-24 1921-03-24 Improvements relating to high frequency cable telegraphy

Publications (1)

Publication Number Publication Date
GB181514A true GB181514A (en) 1922-06-22

Family

ID=9865997

Family Applications (1)

Application Number Title Priority Date Filing Date
GB913321A Expired GB181514A (en) 1920-05-22 1921-03-24 Improvements relating to high frequency cable telegraphy

Country Status (2)

Country Link
FR (1) FR532816A (enExample)
GB (1) GB181514A (enExample)

Also Published As

Publication number Publication date
FR532816A (enExample) 1922-02-13

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