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    NSI-700S-300
 Spherical Near-field Arch Roll Scanner

DESCRIPTION

The NSI model 700S-300 is an ideal system for measuring radiation characteristics of non-moving antennas which require a full hemisphere coverage and can not be tested using the planar near field technique. A traditional spherical near-field system would require the antenna to either move in one or two axes, however the NSI-700S-300 uses a novel dual-axis probe motion design to allow the antenna to remain stationary which is ideal for satellite or radar antenna testing. The system interfaces with a wide variety of NSI, Agilent, or Rohde & Schwarz RF equipment. The Model 700S-300 includes NSI's NSI 2000 Antenna Measurement Software. This 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 Model 700S-300 can be supplied with a variety of options to enhance system performance.
CAPABILITIES

The 700S-300 consists of an arch roll scanner with scanning radius of 8 ft (2.4 m). The phi rotator can operate at speeds up to 30°/s.
FEATURES
  • Radiation Pattern Testing of Fixed Mounted Antennas
  • Scanning arch provides accurate probe motion over ±95 degrees in theta
  • Rotator provides 360 degree phi rotation of arch
  • Automatic Electronic Alignment Capability (link)
  • Dynamic on-the-fly Probe Position Correction Subsystem
  • Multi-beam, Multi-Frequency Control of RF Subsystem
  • NSI 2000 Data Acquisition & Processing Software

SPECIFICATIONS
Construction Steel support column, Phi Rotation Stage, and Theta "C" Shaped Arch Structure
Drive System. Precision Stepper Motors
Scan Area 360° Phi and ± 95° in Theta°
Maximum Antenna Diameter 96" (2.4m)
Resolution 0.0015° Phi and Theta
Position Repeatability 0.015° RMS
Rotational Speed (Theta and Phi) 30°/s Phi, 5°/s Theta
System Controller NSI controller with serial and parallel I/O interfaces
Measurement Workstation Measurement workstation computer with large LCD monitor
Stepper Motor Power Amplifier EIA 19" rack mount (7" high x 14" deep)
Motor Cables Quick-connect; 40' (12m)
Scanner Absorber Absorber Kit (12" pyramidal cone), Flat
Probe WR90 Open-ended Waveguide Probe SMA (f) transition & Pyramidal Absorber (3")
RF Cables 20 GHz RF Cables
Rotary Joints Qty. 3 - DC-26.5 GHz, (Phi, Theta, Pol)
Supported RF Devices NSI Panther Receiver Subsystem or selection of Agilent, Rohde & Schwarz and Anritsu VNA's (contact NSI for a complete List)
Power 100-240 VAC switchable, 50/60 Hz, 500 watts

View of NSI-700S-300 Arch Roll Scanner in Phi 45° Theta 0° Position

View of NSI-700S-300 Arch Roll Scanner in Phi 0° Theta 0° Position

 

DIMENSIONS

    N/A
LINKS
ORDERING INFORMATION

Please contact the NSI Sales department to order this product

Nearfield Systems, Incorporated
19730 Magellan Drive, Torrance, CA 90502, USA, Tel: 310.525.7000, Fax: 310.525.7100
Email: sales@nearfield.com. Visit our website: www.nearfield.com