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1. WO2020002749 - AN ARRANGEMENT FOR CATV AMPLIFIER CONTROL

Publication Number WO/2020/002749
Publication Date 02.01.2020
International Application No. PCT/FI2018/050510
International Filing Date 27.06.2018
IPC
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
60
Receivers
66
Non-coherent receivers, e.g. using direct detection
69
Electrical arrangements in the receiver
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
L
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1
Arrangements for detecting or preventing errors in the information received
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
H
BROADCAST COMMUNICATION
20
Arrangements for broadcast or for distribution combined with broadcast
65
Arrangements characterised by transmission systems for broadcast
76
Wired systems
77
using carrier waves
78
CATV [Community Antenna Television] systems
79
using downlink of the CATV systems, e.g. audio broadcast via CATV network
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
N
PICTORIAL COMMUNICATION, e.g. TELEVISION
7
Television systems
10
Adaptations for transmission by electrical cable
H ELECTRICITY
03
BASIC ELECTRONIC CIRCUITRY
F
AMPLIFIERS
1
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
02
Modifications of amplifiers to raise the efficiency, e.g. gliding Class A stages, use of an auxiliary oscillation
H ELECTRICITY
04
ELECTRIC COMMUNICATION TECHNIQUE
B
TRANSMISSION
10
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
25
Arrangements specific to fibre transmission
2575
Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
H04B 10/69 (2013.01)
H04L 1/00 (2006.01)
H04H 20/79 (2008.01)
H04N 7/10 (2006.01)
H03F 1/02 (2006.01)
H04B 10/2575 (2013.01)
CPC
H03F 1/0266
H03F 2200/63
H04B 10/2575
H04B 10/69
H04H 20/79
H04L 1/00
Applicants
  • TELESTE OYJ [FI/FI]; Telestenkatu 1 20660 Littoinen, FI
Inventors
  • RUMPUNEN, Toni; FI
Agents
  • BERGGREN OY; Visiokatu 1 33720 Tampere, FI
Priority Data
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) AN ARRANGEMENT FOR CATV AMPLIFIER CONTROL
(FR) AGENCEMENT POUR COMMANDE D'AMPLIFICATEUR DE TÉLÉVISION PAR CÂBLE
Abstract
(EN)
A network element (200) of a cable television (CATV) network, said network element comprising one or more amplifier units (206, 208, 210, 212) for amplifying downstream signal transmission for digital output into one or more output channels; means (214) for detecting modulation error ratio (MER) of all active digital output channels; and means for reducing bias current of said one or more amplifier units from a predetermined value until the MER value reaches a predetermined minimum value.
(FR)
L'invention concerne un élément de réseau (200) d'un réseau de télévision par câble (CATV), ledit élément de réseau comprenant une ou plusieurs unités d'amplificateur (206, 208, 210, 212) pour amplifier une transmission de signal aval pour une sortie numérique dans un ou plusieurs canaux de sortie ; des moyens (214) pour détecter le taux d'erreur de modulation (MER) de tous les canaux de sortie numériques actifs ; et des moyens pour réduire le courant de polarisation de ladite ou desdites unités d'amplificateur à partir d'une valeur prédéterminée jusqu'à ce que la valeur MER atteigne une valeur minimale prédéterminée.
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