  This paper presents a large amount of observations for the $\delta$ Scuti
star AN Lyncis carried out in 2001--2012. The extensive observations include
two tri-continent campaigns coordinated in 2002 and 2011, respectively, and
several single-site contributions throughout the period. The data in total have
more than 104100 raw CCD frames and photoelectric records, which consist of 165
nights (about 816 hours) spanning over 3778 days. The final reduced light
curves have more than 26500 data points (including those 3462 unpublished BYU
data), from which we determined 306 new timings of maximum light. A
time-dependent behaviour study based on all available data indicates cyclic
amplitude variability as well as period change [for the main periodicity].
Orbital sinusoid fittings to $(O-C)$ residuals and pulsation amplitudes may
account for their variations being caused by the light-time effect of AN Lyn in
a binary system. The orbital period is about 26--30 years. Current results
support the binarity of AN Lyn, first suspected by Zhou (2002). We further show
the detailed time evolution structure of the pulsation of AN Lyn as function of
both time and period through wavelet analyses.

Solar and Stellar Astrophysics