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 The final reduced lightcurves have more than 26500 data points (including those 3462 unpublished BYUdata), from which we determined 306 new timings of maximum light.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

A Pulsational Time-evolution Study for the $\delta$ Scuti Star AN Lyncis