GB646382A - Carrier current message transmission systems - Google Patents

Carrier current message transmission systems

Info

Publication number
GB646382A
GB646382A GB16345/47A GB1634547A GB646382A GB 646382 A GB646382 A GB 646382A GB 16345/47 A GB16345/47 A GB 16345/47A GB 1634547 A GB1634547 A GB 1634547A GB 646382 A GB646382 A GB 646382A
Authority
GB
United Kingdom
Prior art keywords
band
frequency
filter
filters
channels
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
GB16345/47A
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.)
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 GB646382A publication Critical patent/GB646382A/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
    • H04J1/045—Filters applied to frequency transposition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/10—Intermediate station arrangements, e.g. for branching, for tapping-off

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Filters And Equalizers (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
GB16345/47A 1947-10-17 1947-06-20 Carrier current message transmission systems Expired GB646382A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR56909T 1947-10-17

Publications (1)

Publication Number Publication Date
GB646382A true GB646382A (en) 1950-11-22

Family

ID=8691036

Family Applications (2)

Application Number Title Priority Date Filing Date
GB16345/47A Expired GB646382A (en) 1947-10-17 1947-06-20 Carrier current message transmission systems
GB23837/48A Expired GB655696A (en) 1947-10-17 1948-09-10 Systems of transmission of intelligence by carrier currents

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB23837/48A Expired GB655696A (en) 1947-10-17 1948-09-10 Systems of transmission of intelligence by carrier currents

Country Status (4)

Country Link
BE (1) BE478606A (US06262066-20010717-C00359.png)
CH (1) CH263155A (US06262066-20010717-C00359.png)
FR (2) FR929779A (US06262066-20010717-C00359.png)
GB (2) GB646382A (US06262066-20010717-C00359.png)

Also Published As

Publication number Publication date
FR929779A (fr) 1948-01-07
BE478606A (US06262066-20010717-C00359.png)
GB655696A (en) 1951-08-01
FR56909E (fr) 1952-10-09
CH263155A (de) 1949-08-15

Similar Documents

Publication Publication Date Title
US2226728A (en) Transmission device
ES309308A1 (es) Perfeccionamientos en o relativos a los circuitos electricos para uso en sistemas de senalizacion
GB656023A (en) Improvements in time division multiplex communication systems
US2337878A (en) Carrier wave signaling system
GB1115216A (en) Hybrid transformer
GB646382A (en) Carrier current message transmission systems
GB931052A (en) Improvements in or relating to time division communication systems
US2272613A (en) Transmission with level equalizing
GB860662A (en) Improvements in or relating to carrier telephone systems
JPH0473827B2 (US06262066-20010717-C00359.png)
US2407238A (en) Carrier communication system
US1762754A (en) Phantom carrier circuit
US1448408A (en) Duplex carrier wave system
US2274535A (en) Carrier wave system
US2556677A (en) Secret communication system
US1747163A (en) Carrier-system-testing method and circuit
GB554456A (en) Improvements in electrical communication systems
GB751179A (en) Multichannel radio signalling system
SU856019A1 (ru) Узел служебной св зи
US2298190A (en) Suppression of cross talk
US1665673A (en) Arrangement of carrier channels in multiplex signaling systems
GB371885A (en) Improvements in or relating to carrier current signalling systems
GB395035A (en) Improvements in or relating to telephone or like signalling systems
GB384747A (en) Improvements in or relating to electric telecommunication systems
GB575213A (en) Improvements in or relating to multi-channel signalling systems