FI67006B - Signalfoerdelningsanordning foer en kabeltelevision - Google Patents
Signalfoerdelningsanordning foer en kabeltelevision Download PDFInfo
- Publication number
- FI67006B FI67006B FI753640A FI753640A FI67006B FI 67006 B FI67006 B FI 67006B FI 753640 A FI753640 A FI 753640A FI 753640 A FI753640 A FI 753640A FI 67006 B FI67006 B FI 67006B
- Authority
- FI
- Finland
- Prior art keywords
- diode
- switch
- frequency
- series
- subscriber line
- Prior art date
Links
- 239000003990 capacitor Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000013016 damping Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
- 230000002452 interceptive effect Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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)
Claims (6)
1. Signalfördelningsanordning avsedd att anvSndas i samband med ett kabelnät med en matarledning (1), via vilken ett flertal televisions- och radiofrekvensband Sr överförbara enligt frekvens-multiplexprincipen tillsammans med ISmplig kodning till ett flertal abonnentledningar (2), varvid anordningen innefattar en data-mottagare (3), som Sr kopplad till matarledningen, samt en logisk styrenhet (4), vilken Sr kopplad till datamottagaren för att avko-da koderna och för att styra en högfrekvensströmstSllare (5) i se-rie med varje abonnentledning för att in- resp. urkoppla densamma m.a.p. nStet, kSnnetecknad dSrav, att den förutom nSmn-da högfrekvensströmstSllare (5) i anslutning till varje abonnentledning (2) Sven innefattar minst en ytterligare högfrekvensströmstSllare (14; 10) av halvledartyp, vilken Sr anordnad att in- resp. urkoppla överföringen av ett eller flera frekvensband pä denna abonnentledning.
2. Anordning enligt patentkravet 1, kSnnetecknad dSrav, att nSmnda ytterligare högfrekvensströmstSllare (14) Sr anordnad parallellt med abonnentledningen (2) för att koppia blocke-ringssignaler frin en blockeringsoscillator (9) till abonnentledningen, eventuellt med mellankoppling av en dSmpsats (7), som Sr anordnad att styras av datamottagarens (3) automatiskä förstärk-ningsreglerorgan.
3. Anordning enligt patentkravet 1 eller 2, kSnnetecknad dSrav, att varje högfrekvensströmstSllare (5, 14) bestär av ett diod-motständ-kondensator-nSt, som i serie innefattar tre ensriktat kopplade dioder (D^, D^, D,.), att sammankopplings-stSllet pA vardera sidan av mittendioden (D4) Sr kopplat tili jord via en respektive seriekrets av en diod och en kondensator (D^, och D2, C2)I si att den ena diodens (D^) katod Sr kopplad tili mittendiodens (D^) katod och den andra diodens (D2) anod Sr kopplad tili mittendiodens (D^) anod.
4. Anordning enligt patentkravet 3, kSnnetecknad dSrav, att högfrekvensströmstSllarens (5, 14) högfrekventa ingäng och utgang Sr kopplade tili den första diodens (D3) katod respektive tili den tredje diodens (D5) anod via en kondensator (C4, C5) ,
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL7416880 | 1974-12-24 | ||
| NLAANVRAGE7416880,A NL182689C (nl) | 1974-12-24 | 1974-12-24 | Signaalverdeelinrichting voor een hoogfrequent kabelnetwerk. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI753640A7 FI753640A7 (sv) | 1976-06-25 |
| FI67006B true FI67006B (fi) | 1984-08-31 |
| FI67006C 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 (sv) |
| AT (1) | AT361996B (sv) |
| BE (1) | BE836589A (sv) |
| CA (1) | CA1033053A (sv) |
| DE (1) | DE2558147A1 (sv) |
| DK (1) | DK146915C (sv) |
| ES (1) | ES443805A1 (sv) |
| FI (1) | FI67006C (sv) |
| FR (1) | FR2296335A1 (sv) |
| GB (1) | GB1507859A (sv) |
| IT (1) | IT1052630B (sv) |
| NL (1) | NL182689C (sv) |
| SE (1) | SE420036B (sv) |
Families Citing this family (11)
| 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 |
| DE3470270D1 (en) * | 1983-06-10 | 1988-05-05 | Tocom | Master/slave converter system |
| 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 (sv) * | 1988-11-29 | 1990-06-07 | Neuberger Nachrichten- Und Antennentechnik Gmbh, 8000 Muenchen, De |
Family Cites Families (2)
| 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 |
-
1974
- 1974-12-24 NL NLAANVRAGE7416880,A patent/NL182689C/xx not_active IP Right Cessation
-
1975
- 1975-05-23 CA CA227,709A patent/CA1033053A/en not_active Expired
- 1975-06-09 JP JP50069455A patent/JPS608675B2/ja not_active Expired
- 1975-12-12 BE BE162705A patent/BE836589A/xx not_active IP Right Cessation
- 1975-12-16 AT AT955075A patent/AT361996B/de not_active IP Right Cessation
- 1975-12-22 SE SE7514561A patent/SE420036B/sv not_active IP Right Cessation
- 1975-12-22 DK DK586075A patent/DK146915C/da not_active IP Right Cessation
- 1975-12-23 IT IT52857/75A patent/IT1052630B/it active
- 1975-12-23 DE DE19752558147 patent/DE2558147A1/de not_active Withdrawn
- 1975-12-23 FI FI753640A patent/FI67006C/fi not_active IP Right Cessation
- 1975-12-23 ES ES443805A patent/ES443805A1/es not_active Expired
- 1975-12-23 FR FR7539520A patent/FR2296335A1/fr active Granted
- 1975-12-24 GB GB52836/75A patent/GB1507859A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES443805A1 (es) | 1977-04-16 |
| DK146915B (da) | 1984-02-06 |
| AT361996B (de) | 1981-04-10 |
| CA1033053A (en) | 1978-06-13 |
| IT1052630B (it) | 1981-07-20 |
| FI753640A7 (sv) | 1976-06-25 |
| DK586075A (da) | 1976-06-25 |
| ATA955075A (de) | 1980-09-15 |
| JPS5178621A (en) | 1976-07-08 |
| DE2558147A1 (de) | 1976-07-01 |
| FR2296335B3 (sv) | 1980-06-20 |
| DK146915C (da) | 1984-07-16 |
| NL182689B (nl) | 1987-11-16 |
| SE420036B (sv) | 1981-09-07 |
| GB1507859A (en) | 1978-04-19 |
| BE836589A (fr) | 1976-06-14 |
| JPS608675B2 (ja) | 1985-03-05 |
| NL182689C (nl) | 1988-04-18 |
| FI67006C (fi) | 1984-12-10 |
| FR2296335A1 (fr) | 1976-07-23 |
| SE7514561L (sv) | 1976-06-25 |
| NL7416880A (nl) | 1976-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MA | Patent expired | ||
| MA | Patent expired |
Owner name: OCI COMMUNICATION INC |