FI67006C - Signalfoerdelningsanordning foer en kabeltelevision - Google Patents

Signalfoerdelningsanordning foer en kabeltelevision Download PDF

Info

Publication number
FI67006C
FI67006C FI753640A FI753640A FI67006C FI 67006 C FI67006 C FI 67006C FI 753640 A FI753640 A FI 753640A FI 753640 A FI753640 A FI 753640A FI 67006 C FI67006 C FI 67006C
Authority
FI
Finland
Prior art keywords
diode
switch
frequency
series
subscriber line
Prior art date
Application number
FI753640A
Other languages
English (en)
Finnish (fi)
Swedish (sv)
Other versions
FI753640A (xx
FI67006B (fi
Inventor
Pieter Den Toonder
Original Assignee
Oak Communications 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 Oak Communications Inc filed Critical Oak Communications Inc
Publication of FI753640A publication Critical patent/FI753640A/fi
Application granted granted Critical
Publication of FI67006B publication Critical patent/FI67006B/fi
Publication of FI67006C publication Critical patent/FI67006C/fi

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • 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
    • H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
    • 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)
  • Details Of Television Systems (AREA)
FI753640A 1974-12-24 1975-12-23 Signalfoerdelningsanordning foer en kabeltelevision FI67006C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7416880A NL182689C (nl) 1974-12-24 1974-12-24 Signaalverdeelinrichting voor een hoogfrequent kabelnetwerk.
NL7416880 1974-12-24

Publications (3)

Publication Number Publication Date
FI753640A FI753640A (xx) 1976-06-25
FI67006B FI67006B (fi) 1984-08-31
FI67006C true FI67006C (fi) 1984-12-10

Family

ID=19822721

Family Applications (1)

Application Number Title Priority Date Filing Date
FI753640A FI67006C (fi) 1974-12-24 1975-12-23 Signalfoerdelningsanordning foer en kabeltelevision

Country Status (13)

Country Link
JP (1) JPS608675B2 (xx)
AT (1) AT361996B (xx)
BE (1) BE836589A (xx)
CA (1) CA1033053A (xx)
DE (1) DE2558147A1 (xx)
DK (1) DK146915C (xx)
ES (1) ES443805A1 (xx)
FI (1) FI67006C (xx)
FR (1) FR2296335A1 (xx)
GB (1) GB1507859A (xx)
IT (1) IT1052630B (xx)
NL (1) NL182689C (xx)
SE (1) SE420036B (xx)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1554411A (en) 1975-08-09 1979-10-17 Communications Patents Ltd Control systems
FR2336842B1 (fr) * 1976-08-06 1987-02-27 Stern Joseph Perfectionnements relatifs aux dispositifs de telediffusion par cables ou relatifs a ceux-ci
DE2725250C3 (de) * 1977-06-03 1982-03-18 Siemens AG, 1000 Berlin und 8000 München Kabelfernsehanlage mit abschaltbaren Teilnehmeranschlüssen
DE3045512C2 (de) * 1980-12-03 1982-10-07 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Elektronische Durchschalteinrichtung für Fernseh- und Tonrundfunkprogramme
JPS58221577A (ja) * 1982-06-18 1983-12-23 Yagi Antenna Co Ltd Ｃａｔｖ信号分配方式
JPS5921187A (ja) * 1982-07-27 1984-02-03 Uro Denshi Kogyo Kk 有線放送共同受信用分岐・分配器
US4521809A (en) * 1982-12-29 1985-06-04 North American Philips Corporation Method and apparatus for controlling access to selected television programs
ATE33327T1 (de) * 1983-06-10 1988-04-15 Tocom Haupt-/neben-umsetzersystem.
GB2161679B (en) * 1984-07-06 1988-02-24 Cabletime Ltd Improvements in or relating to signal jamming apparatuses for frequency division multiplex systems
FR2615342B1 (fr) * 1987-05-13 1991-09-13 Applic Realisa Electro Systeme de teledistribution comprenant au moins une chaine de television a peage
DE3840254C1 (xx) * 1988-11-29 1990-06-07 Neuberger Nachrichten- Und Antennentechnik Gmbh, 8000 Muenchen, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3790700A (en) * 1971-12-17 1974-02-05 Hughes Aircraft Co Catv program control system
US3789131A (en) * 1972-08-03 1974-01-29 Oak Industries Inc Selective coding system for subscription television

Also Published As

Publication number Publication date
ATA955075A (de) 1980-09-15
DK146915B (da) 1984-02-06
NL182689B (nl) 1987-11-16
JPS608675B2 (ja) 1985-03-05
DE2558147A1 (de) 1976-07-01
NL7416880A (nl) 1976-06-28
DK146915C (da) 1984-07-16
SE420036B (sv) 1981-09-07
GB1507859A (en) 1978-04-19
FR2296335B3 (xx) 1980-06-20
NL182689C (nl) 1988-04-18
BE836589A (fr) 1976-06-14
FR2296335A1 (fr) 1976-07-23
JPS5178621A (ja) 1976-07-08
CA1033053A (en) 1978-06-13
FI753640A (xx) 1976-06-25
FI67006B (fi) 1984-08-31
SE7514561L (sv) 1976-06-25
AT361996B (de) 1981-04-10
IT1052630B (it) 1981-07-20
DK586075A (da) 1976-06-25
ES443805A1 (es) 1977-04-16

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Legal Events

Date Code Title Description
MA Patent expired
MA Patent expired

Owner name: OCI COMMUNICATION INC