To enable operation at the time of emergency or the like to be treated quickly by reducing and simplifying an operation time at the time of preset direction control for performing direction control adjustment towards a transmission point pre-registering a position of a receiving antenna with regard to television broadcasting receiving a microwave signal transmitted from a mobile object.

A transmission point already registered on a map of a direction control operation screen of an operation screen is displayed by an icon, the icon is selected or, when there are a plurality of transmission points around the selected transmission point, the icon is selected out of a list of icons and names, and the preset direction control is performed.