CH621883A5 - Method and arrangement for controlled supply to users via at least one switching device, particularly for use in a cable television system - Google Patents

Method and arrangement for controlled supply to users via at least one switching device, particularly for use in a cable television system Download PDF

Info

Publication number
CH621883A5
CH621883A5 CH1006776A CH1006776A CH621883A5 CH 621883 A5 CH621883 A5 CH 621883A5 CH 1006776 A CH1006776 A CH 1006776A CH 1006776 A CH1006776 A CH 1006776A CH 621883 A5 CH621883 A5 CH 621883A5
Authority
CH
Switzerland
Prior art keywords
coded
signal
output
control signal
frequency
Prior art date
Application number
CH1006776A
Other languages
German (de)
English (en)
Inventor
Joseph L Stern
Joseph Garodnick
Original Assignee
Joseph L Stern
Joseph Garodnick
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 Joseph L Stern, Joseph Garodnick filed Critical Joseph L Stern
Publication of CH621883A5 publication Critical patent/CH621883A5/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/41—Jamming having variable characteristics characterized by the control of the jamming activation or deactivation time
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/166—Passage/non-passage of the television signal, e.g. jamming, band suppression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/14—Jamming or countermeasure used for a particular application for the transfer of light or images, e.g. for video-surveillance, for television or from a computer screen

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Selective Calling Equipment (AREA)
CH1006776A 1975-08-09 1976-08-06 Method and arrangement for controlled supply to users via at least one switching device, particularly for use in a cable television system CH621883A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB33294/75A GB1554411A (en) 1975-08-09 1975-08-09 Control systems

Publications (1)

Publication Number Publication Date
CH621883A5 true CH621883A5 (en) 1981-02-27

Family

ID=10351060

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1006776A CH621883A5 (en) 1975-08-09 1976-08-06 Method and arrangement for controlled supply to users via at least one switching device, particularly for use in a cable television system

Country Status (10)

Country Link
US (1) US4367557A (fr)
JP (1) JPS5237709A (fr)
AU (1) AU501189B2 (fr)
BE (1) BE845006A (fr)
CA (1) CA1102881A (fr)
CH (1) CH621883A5 (fr)
DE (1) DE2635162C2 (fr)
ES (1) ES450580A1 (fr)
GB (1) GB1554411A (fr)
NL (1) NL182118C (fr)

Families Citing this family (250)

* Cited by examiner, † Cited by third party
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US4367557A (en) 1983-01-04
GB1554411A (en) 1979-10-17
AU1669676A (en) 1978-02-16
BE845006A (fr) 1976-12-01
CA1102881A (fr) 1981-06-09
NL182118B (nl) 1987-08-03
ES450580A1 (es) 1977-12-16
NL182118C (nl) 1988-01-04
JPS5237709A (en) 1977-03-23
DE2635162A1 (de) 1977-02-24
AU501189B2 (en) 1979-06-14
DE2635162C2 (de) 1983-10-13
NL7608794A (nl) 1977-02-11

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