Roll-over-Azimuth Scanner Systems

Features
  • Full 360° x 360° coverage
  • X-band to mmWave measurements
  • Automatic electronic alignment capability
  • Far-field, near-field, and holographic patterns
  • Far-field measurement options available
  • Optional encoder and slip ring assembly for azimuth stage
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Robust Robust Scanning for Antennas up to 3 Meters in Diameter

Roll-over-azimuth scanner systems are ideal  for measuring medium and low gain antennas up to 3 m (9.8 ft) in diameter and is ideally suited to perform cellular and PCS-band base station antenna testing. They use dual-axis roll-over-azimuth high accuracy stepper motor-based positioning system with an adjustable extension foot for probe support. The system is constructed of modular high strength aluminum and can support loads of up to 454 kg (1,000 lb). The location of the probe is adjustable to accommodate different configurations.

  • Specifications
  • Applications
  • Capabilities
  • Available Add-Ons
Construction Azimuth, roll, and pol rotation stages with “L” bracket (aluminum)
Drive System Precision Stepper Motor
Scan Area Full spherical; Roll/Azimuth - 360°
Maximum Antenna Load 4.5 kg (10 lb) to 454 kg (1,000 lb) at 229 mm (9 in.) CG off set
Maximum Antenna Diameter 0.25 m (10 in.) to 3 m (118 in.)
Resolution 0.01° to 0.0125° Azimuth, Roll and Pol
Position Repeatability 0.03° RMS
Rotational Speed (Azimuth, Roll, Pol) 5°/s to 30°/s
System Controller NSI-MI controller with serial and parallel I/O interfaces
 Measurement Workstation Measurement workstation computer with large LCD monitor
 Stepper Motor Power Amplifier EIA 483 mm (19 in.) rack mount.
 Motor Cables Quick-connect; 12 m (40 ft)
 Scanner Absorber Absorber Kit (127 mm (5 in.) and 76 mm (3 in.) pyramidal) 
 Probe Optional
 RF Cables 20 GHz RF Cables
 Rotary Joints Qty. 3 - DC-26.5 GHz, (Azimuth, Roll, Pol)
 Supported RF Devices NSI-MI Receiver Subsystem or selection of Keysight, Rohde & Schwarz and Anritsu VNA's (contact NSI-MI for a complete list)
 Power 100-240 VAC switchable, 50/60 Hz, 500 watts
  
Dimension

Width 1.75 m to 2.7 m (69 in. to 106 in.)
Depth 0.45 m (18 in.) to variable
Height 1.6 m to 2.9 m (64.3 in. to 116 in.)
Weight   45 kg (100 lb) approx to 1,134 kg (2,500 lb)
The system interfaces with a wide variety of RF equipment and is capable of measuring amplitude and phase patterns from X-band to mmWave frequencies. The systems include NSI-MI Antenna Measurement Software.

The system software runs on a Windows-based measurement workstation and provides automatic setup of scans based on measurement parameters and desired output. Measured data can be processed for far-field or holographic patterns yielding complete characterization of the antenna’s performance. A single data set provides information on antenna gain, side lobe structure, beam pointing and cross polarization.

The systems can be supplied with a variety of options to enhance system performance.
  • Opt 100 220VAC 50 Hz Operation
  • Opt 101 European Version - CE Mark
  • Opt 102 Delete X-band Probe
  • Opt 103 Additional Operation and Maintenance Manual
  • Spherical Upgrade
  • Probe Roll Stage
  • Probe Z-Stage, 102 mm (4 in.) translation
  • On-Site Installation and Training