FR2249504A1 - Community antenna system - supplies a large number of receivers with broadcast and TV programs - Google Patents

Community antenna system - supplies a large number of receivers with broadcast and TV programs

Info

Publication number
FR2249504A1
FR2249504A1 FR7435660A FR7435660A FR2249504A1 FR 2249504 A1 FR2249504 A1 FR 2249504A1 FR 7435660 A FR7435660 A FR 7435660A FR 7435660 A FR7435660 A FR 7435660A FR 2249504 A1 FR2249504 A1 FR 2249504A1
Authority
FR
France
Prior art keywords
vhf
programs
range
special
signals
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.)
Granted
Application number
FR7435660A
Other languages
French (fr)
Other versions
FR2249504B3 (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.)
Hans Kolbe and Co
Original Assignee
Hans Kolbe and Co
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 Hans Kolbe and Co filed Critical Hans Kolbe and Co
Publication of FR2249504A1 publication Critical patent/FR2249504A1/en
Application granted granted Critical
Publication of FR2249504B3 publication Critical patent/FR2249504B3/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
    • H03D7/18—Modifications of frequency-changers for eliminating image frequencies

Abstract

Signals of VHF programs are in the VHF distribution network within the system converted into VHF special channels which are in the receiver reconverted into UHF range. The additional programs are in the VHF distribution network preferentially transmitted in the upper VHF special range. At suitable points of the above network, signals in the whole VHF special range are reconverted into UHF signals by modulation on an oscillator frequency, so that the upper sideband, result of this mixing, falls directly into the required UHF range. The device for the reconversion has filters separating the upper VHF special range from other VHF frequencies.
FR7435660A 1973-10-30 1974-10-24 Community antenna system - supplies a large number of receivers with broadcast and TV programs Granted FR2249504A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732354242 DE2354242A1 (en) 1973-10-30 1973-10-30 COMMUNITY ANTENNA SYSTEM

Publications (2)

Publication Number Publication Date
FR2249504A1 true FR2249504A1 (en) 1975-05-23
FR2249504B3 FR2249504B3 (en) 1977-08-05

Family

ID=5896805

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7435660A Granted FR2249504A1 (en) 1973-10-30 1974-10-24 Community antenna system - supplies a large number of receivers with broadcast and TV programs

Country Status (4)

Country Link
CH (1) CH584993A5 (en)
DE (1) DE2354242A1 (en)
FR (1) FR2249504A1 (en)
NL (1) NL7413909A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533943A1 (en) * 1985-09-24 1987-04-16 Wolf & Co Kg Kurt Arrangement for receiving the television channels and special television channels available on a cable connection
DE3604545C1 (en) * 1986-02-13 1987-07-02 Wolf & Co Kg Kurt Arrangement for converting special channels of television into television channels of the UHF band

Also Published As

Publication number Publication date
DE2354242A1 (en) 1975-05-07
FR2249504B3 (en) 1977-08-05
CH584993A5 (en) 1977-02-15
NL7413909A (en) 1975-05-02

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Legal Events

Date Code Title Description
ST Notification of lapse