The STX21 mount is essentially mechanical, there are no
electronics, gyro’s or IMU’s attached. The electronics
necessary for the operation of the mount is contained in a separate housing called the STX controller. The STX controller must be connected to an IMU, like an Applanix or a Novatel. The controller uses the IMU attitude output data to level the mount in real time. Note that this mount
will only work if your sensor system uses an IMU and if the IMU data can be sent to the STX controller.