| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and method for testing a portion of a cable network. SOLUTION: This system and method for testing a portion of a cable network has a pattern generator (600), an addresser (602), a forward error corrector (606), and a comparator (604). The system and method is particularly adapted to testing the upstream channel in a cable network. The pattern generator generates a test signal, and the addresser addresses the signal to a known server and also instructs the known server to return the test signal to the test system. The forward error corrector corrects errors introduced in the test signal in transmission from the known server to the test system. The comparator then compares the returned test signal to the originally transmitted test signal to determine the performance of the back channel, preferably, the comparator uses a bit error rate test to determine the performance of the back channel. COPYRIGHT: (C)2005,JPO&NCIPI
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