For the best results, aim for a relatively flat lawn – major dips or mounds can create puddles or dry patches. But there is no need to worry about every tiny bump and hollow. With proper setup and adjustments, most lawns can receive good coverage from an oscillating sprinkler.
The key is to position it on the high point and adjust the range, width, and flow to suit your terrain. A little trial and error will help you dial it in just right for full and consistent watering.