Rotary Positioners

Performance Series - Virtual EL/AZ/Roll Positioners - Medium Duty

The Virtual EL/AZ/Roll Positioner represents the latest generation of multi-axis rotary positioning medium-duty subsystems. It offers enhanced capabilities and improved performance relative to size and incorporates new engineering advances.

Particularly suited for testing direction-finding antennas, the virtual elevation axis enables rotation of the DUT around its phase center, placing the mechanical support system behind the DUT. This feature maintains the center of the DUT in one place, while eliminating scattering and interference from the positioning structure.


  • AL-9013 -
  • AL-9205
Performance Series - Virtual EL/AZ/Roll Positioners - Medium Duty


  • Automated radar application subsystems
  • Far-field & near-field antenna measurements
  • Radome testing
  • OTA testing
  • Indoor use


  • Virtual elevation axis
  • No interference from structure on DUT measurement results
  • Optimum performance relative to size
  • Vertical load up to 88 lbs (40 Kg)
  • AUT mounting interface diameter - 544 mm
  • Angular positioning accuracy
  • Low backlash design
  • Closed loop servo control
  • Precision bearings
  • Industry-standard wiring
  • Tachometer for optimum speed regulation & control
  • Wide operating temperature range:32° F to 104° F (0° C to 40° C)
  • Fully enclosed design of drive gear train & data take-off
  • Wide variety of available options