Patent ID: 6359944
Filing Date: 2002-03-19
Classification: H03J

Abstract:
A method of controlling a tuner (9) which receives a plurality of RF signals and which produces a carrier signal bearing information corresponding to a tuned one of said RF signals, said tuner (9) including a local oscillator (911) having a frequency controlled in accordance with digital tuning representative words to tune respective ones of said RF signals; said method comprising the steps of:storing digital nominal frequency representative words for respective ones of said RF signals; storing digital offset representative words for respective ones of said RF signals; determining a frequency offset of said carrier signal after a RF signal has been tuned; updating all of said digital offset representative words in accordance with said frequency offset of said carrier; deriving the tuning representative word for an RF signal selected to be tuned by combining said nominal frequency representative word for said RF signal selected to be tuned with said previously updated offset representative word for said RF signal selected to be tuned; and updating the respective digital offset representative word for an individual RF signal presently being tuned if correct tuning is not achieved with the previously updated offset representative word.