Tuning apparatus for a frequency synthesizer tuner

Abstract

A tuner for receiving a video broadcast signal comprises commendable circuits (6, 7, 8, 17) to select a tuned frequency, the tuner comprising a bus interface (21) receiving data bytes and among those data bytes, bytes representing a divider ratio N, and address bytes. Bytes received by the bus interface (21) are processed through a N divider comparator (23) comparing the value of divider ratio N received from the bus interface (21) to values stored in a register (24), the comparator (23) outputting address bytes and data bytes to be sent to the commendable circuit (6, 7, 8, 17) of the tuner to select a band and a tuned frequency. The tuner may be implemented on a chassis of a receiver without modification of an existing software included with a microprocessor of the chassis. The values stored in the register (24) are customized values of the tuner.

Dependencies are inferred from the claim text.