A digital television receiver includes a tuner for down-converting an
incoming signal to produce a down-converted signal according to a local
oscillator signal corresponding to a selected channel. A filter is
coupled to the tuner for filtering the down-converted signal to produce
an intermediate frequency (IF) signal. A carrier recovery unit is coupled
to the filter for locking to a carrier frequency of the IF signal, and a
pre-shift unit is coupled to the tuner. By shifting the local oscillator
signal in a first direction by a predetermined first frequency shift in a
first phase of carrier recovery, and then by shifting the local
oscillator signal in a second direction by a second frequency shift in a
second phase of carrier recovery, the pre-shift unit ensures a pilot tone
of a selected channel is not filtered from the down-converted signal by
the filter.