CA2308497A1 - Systeme de localisation et de detection de degradation de chemin de retour de television a antenne collective (catv) - Google Patents
Systeme de localisation et de detection de degradation de chemin de retour de television a antenne collective (catv) Download PDFInfo
- Publication number
- CA2308497A1 CA2308497A1 CA002308497A CA2308497A CA2308497A1 CA 2308497 A1 CA2308497 A1 CA 2308497A1 CA 002308497 A CA002308497 A CA 002308497A CA 2308497 A CA2308497 A CA 2308497A CA 2308497 A1 CA2308497 A1 CA 2308497A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- remote unit
- measurement
- frequency
- frequencies
- 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.)
- Abandoned
Links
- 230000006735 deficit Effects 0.000 title claims abstract description 32
- 238000001514 detection method Methods 0.000 title claims description 24
- 238000005259 measurement Methods 0.000 claims abstract description 158
- 238000004891 communication Methods 0.000 claims abstract description 57
- 238000000034 method Methods 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 claims description 17
- 238000010168 coupling process Methods 0.000 claims description 17
- 238000005859 coupling reaction Methods 0.000 claims description 17
- GNFTZDOKVXKIBK-UHFFFAOYSA-N 3-(2-methoxyethoxy)benzohydrazide Chemical compound COCCOC1=CC=CC(C(=O)NN)=C1 GNFTZDOKVXKIBK-UHFFFAOYSA-N 0.000 claims 2
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims 1
- 238000012360 testing method Methods 0.000 description 66
- 238000010586 diagram Methods 0.000 description 12
- 238000011144 upstream manufacturing Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 230000001360 synchronised effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 230000002441 reversible effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/10—Adaptations for transmission by electrical cable
- H04N7/102—Circuits therefor, e.g. noise reducers, equalisers, amplifiers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
L'invention concerne un procédé permettant de détecter des dégradations, utilisé dans un système de communications multicanal destiné à émettre des signaux sur une pluralité de fréquences de canal. La première étape du procédé consiste à émettre, à partir d'une unité de tête de réseau, un ou plusieurs signaux d'information sur le système de communications multicanal, ces signaux comprenant des informations qui identifient une ou plusieurs fréquences à mesurer. La seconde étape du procédé consiste à émettre un signal de déclenchement sur le système de communications multicanal. Dans d'autres étapes du procédé, la première et la seconde unités distante, reliées de manière fonctionnelle à différentes localisations situées sur le sur le système de communications multicanal, reçoivent au moins les signaux d'information et le signal de déclenchement. Chacune des première et seconde unités distantes, sensibles au signal de déclenchement, effectue ensuite une mesure qui mesure le niveau de signal correspondant à au moins une première fréquence parmi les fréquences à mesurer, la première fréquence étant identifiée dans les signaux d'information reçus. La première et la seconde unités distantes effectuent la mesure environ au même moment.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14543298A | 1998-09-02 | 1998-09-02 | |
| US09/145,432 | 1998-09-02 | ||
| PCT/US1999/020512 WO2000013424A1 (fr) | 1998-09-02 | 1999-09-02 | Systeme de localisation et de detection de degradation de chemin de retour de television a antenne collective (catv) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2308497A1 true CA2308497A1 (fr) | 2000-03-09 |
Family
ID=22513088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002308497A Abandoned CA2308497A1 (fr) | 1998-09-02 | 1999-09-02 | Systeme de localisation et de detection de degradation de chemin de retour de television a antenne collective (catv) |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1046309A1 (fr) |
| CA (1) | CA2308497A1 (fr) |
| WO (1) | WO2000013424A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9357163B2 (en) | 2012-09-20 | 2016-05-31 | Viavi Solutions Inc. | Characterizing ingress noise |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1295463A4 (fr) * | 2000-05-16 | 2005-12-14 | Comsonics Inc | Dispositif et procede permettant de determiner l'emplacement de l'entree de signaux |
| DE10218668C1 (de) * | 2002-04-19 | 2003-10-09 | Satelliten Und Kabelfernsehanl | Rückkanal-Analysesystem zur Analyse von Störsignalen im Rückkanal und zur Rückkanaleinstellung in CATV-Anlagen und dessen Verwendung |
| FI120074B (fi) * | 2006-12-22 | 2009-06-15 | Teleste Oyj | Paluukanavan mittaus kaapelitelevisioverkossa |
| US8458759B2 (en) * | 2007-06-19 | 2013-06-04 | Arcom Digital, Llc | Method and apparatus for locating network impairments |
| US9450686B2 (en) | 2011-06-30 | 2016-09-20 | Viavi Solutions Inc. | Testing an upstream path of a cable network |
| US9882668B2 (en) * | 2014-09-18 | 2018-01-30 | Arcom Digital, Llc | Detecting leakage of OFDM signals from an HFC network |
| US9832089B2 (en) | 2015-01-07 | 2017-11-28 | Arcom Digital, Llc | Detecting leakage of OFDM signals from an HFC network |
| US9882663B2 (en) | 2016-03-17 | 2018-01-30 | Arcom Digital, Llc | Doppler location of signal leaks in an HFC network |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520508A (en) * | 1982-12-21 | 1985-05-28 | General Instrument Corporation | Subscriber terminal for monitoring radio-frequency signal ingress into cable television systems |
| US5585842A (en) * | 1994-09-19 | 1996-12-17 | Wavetek Corporation | CATV frequency sweep testing using RF transmitter to generate test signals |
-
1999
- 1999-09-02 CA CA002308497A patent/CA2308497A1/fr not_active Abandoned
- 1999-09-02 WO PCT/US1999/020512 patent/WO2000013424A1/fr not_active Ceased
- 1999-09-02 EP EP99945562A patent/EP1046309A1/fr not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9357163B2 (en) | 2012-09-20 | 2016-05-31 | Viavi Solutions Inc. | Characterizing ingress noise |
| US10594364B2 (en) | 2012-09-20 | 2020-03-17 | Viavi Solutions Inc. | Characterizing ingress noise |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000013424A1 (fr) | 2000-03-09 |
| EP1046309A1 (fr) | 2000-10-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued | ||
| FZDE | Discontinued |
Effective date: 20020802 |