| 摘要 |
A system for control of noise in a cable TV upstream path of a bi-directional cable TV home amplifier system that is positioned in the premises of the end user includes a noise control circuit and a coupler element that couples between the noise control circuit and the cable TV upstream path. The system further includes an amplifier part that is disposed on the upstream path. The noise control circuit connects or disconnects the cable TV upstream path depending on the level of signal passing through the cable TV upstream path. Namely, when the level of a signal that passes through the upstream path is lower than a predefined signal threshold, the noise control circuit disconnects the upstream path, and when the level of the signal is greater than a predefined signal threshold, the noise control circuit connects the upstream path. |
