EP 1173976 A1 20020123 - METHOD AND APPARATUS FOR USING RF DETECTOR AND DELAY CIRCUIT TO REDUCE NOISE BUILDUP IN RF RETURN SYSTEMS
Title (en)
METHOD AND APPARATUS FOR USING RF DETECTOR AND DELAY CIRCUIT TO REDUCE NOISE BUILDUP IN RF RETURN SYSTEMS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR VERWENDUNG VON EINEM RF-DETEKTOR UND EINER VERZÖGERUNGSSCHALTUNG ZUR STÖRUNGSVERMINDERUNG IN RF-RÜCKSYSTEMEN
Title (fr)
PROCEDE ET APPAREIL UTILISANT UN DETECTEUR RF ET UN CIRCUIT DE RETARD POUR REDUIRE L'ACCUMULATION DE BRUIT DANS LES SYSTEMES DE RETOUR RF
Publication
Application
Priority
- US 0008825 W 20000403
- US 29129099 A 19990414
Abstract (en)
[origin: WO0062545A1] This method and apparatus minimizes noise buildup in a wireless or wireline RF return system of a cable television system through which set-top terminals communicate with the cable system headend. An RF detector detects the signal from the set-top terminal to the headend. The RF detector, through a delay circuit, closes an RF switch or turns on a transverter allowing the signal from the set-top terminal to be communicated to the RF return system. The delay circuit prevents the link between the set-top terminal and the return system from being broken for a predetermined period of time after the RF detector stops detecting a signal from the set-top terminal. This prevents delays in transmitting signals, particularly time division multiplexed signals.
IPC 1-7
IPC 8 full level
H04N 7/10 (2006.01); H04N 7/173 (2011.01)
CPC (source: EP)
H04N 7/102 (2013.01); H04N 7/17309 (2013.01); H04N 21/6118 (2013.01); H04N 21/6168 (2013.01)
Citation (search report)
See references of WO 0062545A1
Designated contracting state (EPC)
DE GB
DOCDB simple family (publication)
WO 0062545 A1 20001019; AU 4066500 A 20001114; CA 2370516 A1 20001019; EP 1173976 A1 20020123; TW 488166 B 20020521
DOCDB simple family (application)
US 0008825 W 20000403; AU 4066500 A 20000403; CA 2370516 A 20000403; EP 00920071 A 20000403; TW 89107030 A 20000414