Patent ID: 7246368
Filing Date: 2007-07-17
Classification: H04L

Abstract:
1. A method of testing a cable network, using one or more cable modems on the cable network, while allowing live data traffic at an original frequency, the method comprising: (a) identifying a group of time increments, associated with live data transmission, during which cable modems on the network are not scheduled to transmit data; (b) instructing a first one of the one or more cable modems (c) measuring the power of the first test signal received at a specified location on the cable network; (d) instructing the first cable modem (e) measuring the power of the second test signal received at the specified location on the cable network; and (f) recording a power versus frequency spectrum of the first modem at at least the first and second frequencies, wherein the first and second frequencies belong to different transmission channels.