--- -- March 11, 2008 ---

Antenna Gain Pattern Testing Equipment

General Description:

This system is intended as a moderate cost unit for antenna test applications requiring both azimuth and elevation movement, in addition to recording test data. The elevation section may be separated from the azimuth unit and the azimuth purchased separately.

Unit is intended for those preferring to develop their own software. Interfacing the positioner to your PC is straightforward using one of the many data acquisition boards with A-D input and TTL logic output functions.

General Specifications, Positioner Unit:

• Azimuth Rotation: > 360° (limited by cables)
• Elevation Movement: > 360° (limited by cables)
• Rotation Movement: > 360° (limited by cables) Version 2
• Positioner Motor Drive: TTL/Relay-Controlled DC motors
  Variable speed Azimuth and Elevation ( ~ 2.8°/sec. to 20°/sec.)
• Position Sense Output: 0-10 DC analog voltage
  and encoder 5 volt 1 pulse per degree
  Version 2 8 TTL pulses per degree output.
• AC Power Requirements: 120 VAC, < 1A
• All rotation axles have 3/4" holes through center.
• Mounting: Stainless Steel Tripod (option)
• Weight: Approximately 60 lbs.
  
  
  

Additional Version 1 Photos of Positioner and Controller

Additional Photo of Positioner, Version 2

DrawingsVersion 1 Mechanical Drawings of Positioner

Here you will find sample output printed on an HP-85 thermal printer

This plot was made on an HP 7475 plotter.

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