ES435664A1 - Wired broadcasting systems - Google Patents

Wired broadcasting systems

Info

Publication number
ES435664A1
ES435664A1 ES435664A ES435664A ES435664A1 ES 435664 A1 ES435664 A1 ES 435664A1 ES 435664 A ES435664 A ES 435664A ES 435664 A ES435664 A ES 435664A ES 435664 A1 ES435664 A1 ES 435664A1
Authority
ES
Spain
Prior art keywords
frequency
subscriber
cable
signals
sources
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
ES435664A
Other languages
Spanish (es)
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.)
Communications Patents Ltd
Original Assignee
Communications Patents Ltd
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 Communications Patents Ltd filed Critical Communications Patents Ltd
Publication of ES435664A1 publication Critical patent/ES435664A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17345—Control of the passage of the selected programme
    • H04N7/17354—Control of the passage of the selected programme in an intermediate station common to a plurality of user terminals

Abstract

Improvements in cable broadcasting systems, comprising a broadband coaxial cable for transporting multi-channel program signals from one program source or sources to a plurality of exchanges with each of which a plurality of units are connected subscriber, the program source or sources being provided to apply the signals to the cable stacked one on top of the other in frequency, and each exchange with respect to each subscriber comprising a switchable frequency translator to selectively translate any one of said stacked frequency signals to a different predetermined frequency for the reception of which the subscriber unit is prepared, controllable switching means from the respective subscriber unit to selectively switch the frequency translator, and an output circuit intended to apply the other aforementioned predetermined frequency signal to a cable power with which you are subscriber connected. (Machine-translation by Google Translate, not legally binding)
ES435664A 1974-03-16 1975-03-15 Wired broadcasting systems Expired ES435664A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11791/74A GB1480749A (en) 1974-03-16 1974-03-16 Wired broadcasting systems

Publications (1)

Publication Number Publication Date
ES435664A1 true ES435664A1 (en) 1976-12-01

Family

ID=9992776

Family Applications (1)

Application Number Title Priority Date Filing Date
ES435664A Expired ES435664A1 (en) 1974-03-16 1975-03-15 Wired broadcasting systems

Country Status (13)

Country Link
JP (1) JPS50133701A (en)
BE (1) BE826763A (en)
CA (1) CA1052446A (en)
CH (1) CH589981A5 (en)
DE (1) DE2510865C3 (en)
ES (1) ES435664A1 (en)
FR (1) FR2264447B1 (en)
GB (1) GB1480749A (en)
IL (1) IL46827A (en)
IT (1) IT1032322B (en)
NL (1) NL183694B (en)
SE (1) SE407002B (en)
ZA (1) ZA751615B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4135157A (en) * 1977-03-28 1979-01-16 Oak Industries Inc. Pole mounted converter
DE2807986A1 (en) * 1978-02-22 1979-08-30 Hertz Inst Heinrich SYSTEM FOR INTERACTIVE CABLE TV
CA1142244A (en) * 1979-08-22 1983-03-01 Eric J. Gargini Wired broadcasting system with subscriber controlled switched programme selection
DE2951512A1 (en) * 1979-12-20 1981-07-02 Siemens AG, 1000 Berlin und 8000 München BROADBAND SWITCHING SYSTEM
FR2515400A1 (en) * 1981-10-26 1983-04-29 Visiodis Sa FDM system for remote control of surveillance cameras - uses frequency converters at remotely controlled concentrator for transposed base band signals
GB2127257A (en) * 1982-08-17 1984-04-04 Visionhire Cable Limited Distribution apparatus
DE3301208A1 (en) * 1983-01-15 1984-07-26 ANT Nachrichtentechnik GmbH, 7150 Backnang Broadband switching network
FI19992812A (en) * 1999-12-29 2001-06-30 Helsingin Puhelin Oyj Method of increasing the data transmission capacity of a data transmission network, such as a cable TV network

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3073906A (en) * 1959-06-16 1963-01-15 Bell Telephone Labor Inc Line concentrating telephone system
BE632218A (en) * 1963-05-31
GB1272594A (en) * 1968-08-09 1972-05-03 Communications Patents Ltd Improvements in and relating to wired broadcasting systems

Also Published As

Publication number Publication date
IL46827A (en) 1977-07-31
BE826763A (en) 1975-07-16
NL7503107A (en) 1975-09-18
ZA751615B (en) 1976-02-25
SE407002B (en) 1979-03-05
FR2264447A1 (en) 1975-10-10
IL46827A0 (en) 1975-05-22
DE2510865A1 (en) 1975-09-18
GB1480749A (en) 1977-07-20
CH589981A5 (en) 1977-07-29
NL183694B (en) 1988-07-18
SE7502806L (en) 1975-09-17
IT1032322B (en) 1979-05-30
DE2510865C3 (en) 1983-11-10
CA1052446A (en) 1979-04-10
FR2264447B1 (en) 1981-07-24
DE2510865B2 (en) 1978-12-14
JPS50133701A (en) 1975-10-23

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971103