A method, system and apparatus for frequency sweeping and frequency sweep testing a CATV system wherein the CATV system has a plurality of channels and is transmitting television signals over at least some of the channels. The system includes a head end test unit coupled to the CATV system at its head...http://www.google.fr/patents/US6160991?utm_source=gb-gplus-shareBrevet US6160991 - CATV frequency sweep testing remote unit
