Abstract: Digital control apparatus for automatically slewing i.e. orienting a directive antenna to a quasi-stationary transponder such as a synchronous satellite in orbit above the earth wherein appropriate drive signals for the elevation and/or azimuth axes are provided in response to the received signal from the transponder until the peak or substantially maximum signal strength is sensed. Operationally, digital logic circuitry utilizes the characteristics of the antenna beam pattern to detect the approach toward zero slope near the peak of the pattern to slew the antenna to the peak signal.