System for enhancing the performance of a CATV settop terminal

摘要

A system (10) for use with a CATV settop terminal (12) measures the input RF carrier signal power level at several frequencies within the CATV RF input bandwidth upon system power-up. The system utilises these measurements to selectively equalise and process the RF input signal depending upon the carrier frequency selected and the desired signal level to be input to the RF tuner. The system refines the signal level by specifically measuring the signal level of the selected carrier frequency. The system further improves RF tuner performance by dynamically limiting the bandwidth input to the RF tuner depending upon the selected carrier frequency.