NON-INVASIVE FREQUENCY ROLLBACK APPARATUS AND METHOD

摘要

A spare receiver (4) in a CMTS is used to non-invasively test the signal quality of an original channel frequency of a receiver which has been tuned to another channel frequency so the operator can retune the receiver to its original channel frequency without disrupting subscriber operations. The spare receiver (4) is RF connected to the receiver (2) and performs RSSI testing on the channel frequency. If the channel frequency is sufficiently noise free, a modem is registered on the spare receiver (4) as a testing modem. The testing modem (4) is used to test the signal quality of the network, such as by using a SNR test. When the original channel frequency is determined to have a sufficient SNR value, the reoeiver (2) is retuned to its original channel frequency.