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CylindricalSystems_600C_Nearfield_Scanners

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600C - Cylindrical Near-Field Scanners

Scanner

600C-3 600C-5 600C-6 600C-8

Datasheet

Orientation

Vertical Vertical Vertical Vertical

Material

Aluminum Aluminum Steel Steel
Construction Tower and base Tower and base Tower and base Tower and base

Scan Y travel feet (meters)

3'

(0.9 m)

5'

(1.5 m)

6'

(1.8 m)

8'

(2.5 m)

Frequency S-band to mmWave S-band to mmWave Mid L-band to mmWave Mid L-band to mmWave

Y-axis Linearity (RMS) uncorrected

<0.003"
(0.076 mm)
<0.005"
(0.1 mm)
<0.003"
(0.076 mm)
<0.003"
(0.076 mm)

Y-axis Linearity (RMS) corrected

<0.001"
(0.025 mm)
<0.001"
(0.025 mm)
<0.001"
(0.025 mm)
<0.001"
(0.025 mm)

Y Position Repeatability (RMS)

0.002"
(0.05 mm)
0.0025"
(0.06 mm)
0.002"
(0.05 mm)
0.002"
(0.05 mm)

Y Position Resolution

0.002"
(0.05 mm)
0.0025"
(0.06 mm)
0.001"
(0.025 mm)
0.001"
(0.025 mm)

Y Scan Speed-Nominal

15 in/s
(0.38 m/s)

15 in/s
(0.38 m/s)

15 in/s
(0.38 m/s)

15 in/s
(0.38 m/s)

Azimuth Span 360 deg 360 deg 360 deg 360 deg
Azimuth Position Resolution .0125 deg .0125 deg .0125 deg .0125 deg
Azimuth Scan Speed-Nominal 20 deg/sec 20 deg/sec 20 deg/sec 20 deg/sec

Dimensional Information *

Width

39"
(1.0 m)
39"
(1.0 m)
63"
(1.6 m)
49"
(1.2 m)

Depth

90"
(2.3 m)
90"
(2.3 m)
114"
(2.9 m)
114"
(2.9 m)

Height

59"
(1.5 m)

100"
(2.5 m)
120"
(3.1 m)
153"
(3.9 m)
Azimuth stage diameter 6"
(0.15 m)
6"
(0.15 m)
6"
(0.15 m)
12"
(0.30 m)
Azimuth stage load capacity (centered load) 1595 lb
(725 kg)
1595 lb
(725 kg)
1595 lb
(725 kg)
1595 lb
(725 kg)
AUT Bending Moment Allowed 35 lb-ft
(47 Nm)
35 lb-ft
(47 Nm)
35 lb-ft
(47 Nm)
300 lb-ft
(407 Nm)
Probe Carriage Capacity 10 lb
(4.5 kg)
20 lb
(9 kg)
50 lb
(23 kg)
50 lb
(23 kg)
System Weight 150 lb
(68 kg)
350 lb
(159 kg)

1400 lb

(636 kg)

1400 lb

(636 kg)

Minimum Recommended Room Size {Includes 12" absorber} *

Width

8'
(2.4 m)
8'
(2.4 m)
9'
(2.7 m)
9'
(2.7 m)

Depth **

11'
(3.4 m)
13'
(4.0 m)
13'
(4.0 m)
13'
(4.0 m)

Height

9'
(2.7 m)

12'
(3.7 m)
13'
(4.0 m)
15'
(4.6 m)

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* Exact dimensions are dependent on specific configurations, and are subject to change. Please verify dimensions for specific configurations with NSI.
** Depth of the room is mainly dependent on the device under test. The depth values shown here assume a test object thickness equivalent to half of the scan range height.

 

Cylindrical System Overview

NSI’s cylindrical scanners are well suited to testing fan beam, cellular base-station, stacked dipole arrays, and antennas that have broad azimuth and narrow elevation plane patterns. They are constructed to the highest standards and are based on years of experience. The scanner consists of two major components a probe tower and an azimuth positioner. The probe is attached to a carriage that rides on precision steel rails attached to the side of the tower. NSI uses precision stepper motors with low-stretch timing belts on the small scanners and rack-and-pinion drives on the medium and large models to drive the probe carriage in the vertical (Y) direction. The tower assembly is mounted to a stable base that provides a firm foundation. The azimuth rotation stage is located such that the center of rotation is in-line with the probe polarization axis and parallel with the Y-axis. The AUT is placed on a mast attached to the azimuth stage and set to be at the center of the probe’s vertical (Y) scan range. NSI provides special alignment tools and instructions to allow the customer to verify accurate scanner alignment.

The probe carriage can accommodate options such as a probe polarization rotation and/or Z translation stage. The polarization rotation stage is used to automatically change the probe’s electrical field orientation permitting automatic measurements of both orthogonal polarizations as part of a single data collection sequence. The optional Z-stage simplifies Z positioning to accommodate different frequency ranges as well as different antenna types.

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