The Antenna Positioner consists of the mast for the receiving antenna (antenna under test), a drive motor, a signal detector, a variable attenuator, and a shaft encoder. The drive motor is used to rotate the mast while the rotation is controlled by the LVDAM-ANT software via the Data Acquisition Interface. An SMA connector, mounted on the base of the mast, allows a connection to be made between the receiving antenna and the signal detector. This detector provides a signal whose voltage depends on the level of the RF signal received. This signal is available on a BNC connector for connection to the Data Acquisition Interface.

The variable attenuator allows adjustments to be made to the sensitivity of the receiving system according to the strength of the received signal, in order to prevent system saturation. This attenuator is controlled by the LVDAM-ANT software via the Data Acquisition Interface. The shaft encoder is coupled with the shaft of the drive motor and provides signals to monitor the rotation of the mast. Two multi-pin connectors on the Antenna Positioner allow connection to the Data Acquisition Interface / Power Supply.