Nearfield Systems Inc. (NSI), the leader in antenna measurement systems.

Cylindrical Near-Field Scanner Models
Scanner	600C-3	600C-5	600C-6	600C-8	600C-12	600C-18	600C-22	600C-52
Datasheet
rientation	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical	Vertical
Material	Aluminum	Aluminum	Steel	Steel	Steel	Steel	Steel	Steel
Construction	Tower and base	Tower and base	Tower and base	Tower and base	Tower and base	Tower and base	Tower and base	Tower and base
Scanner Y travel feet (meters)	3' (0.9m)	5' (1.5m)	6' (1.8m)	8' (2.5m)	12' (3.7m)	18' (5.5m)	22' (6.7m)	52' (16.0m)
Frequency	S-band to mmWave	S-band to mmWave	Mid L-band to mmWave	Mid L-band to mmWave	L-band to mmWave	L-band to mmWave	L-band to mmWave	L-band to mmWave
Y-axis Linearity (RMS) uncorrected	<0.003" (0.076 mm)	<0.005" (0.125 mm)	<0.003" (0.076 mm)	<0.003" (0.076 mm)	<0.004" (0.100 mm)	<0.004" (0.100 mm)	<0.004" (0.100 mm)	<0.004" (0.100 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)	<0.001" (0.025 mm)	<0.001" (0.025 mm)	<0.001" (0.025 mm)	<0.001" (0.025 mm)
Y Position Repeatability	0.002" (0.05 mm)	0.0025" (0.06mm)	0.002" (0.05 mm)	0.002" (0.025 mm)	0.002" (0.05 mm)	0.002" (0.05 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)	0.002" (0.05 mm)	0.002" (0.05 mm)	0.002" (0.05 mm)	0.002" (0.05 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)	15 in/s (0.38 m/s)	15 in/s (0.38 m/s)	10 in/s (0.25 m/s)	8 in/s (0.2 m/s)
Azimuth span	360 deg	360 deg	360 deg	360 deg	360 deg	360 deg	360 deg	360 deg
Azimuth Position Resolution	.0125 deg	.0125 deg	.0125 deg	.0125 deg	.01 deg	.01 deg	.01 deg	.01 deg
Azimuth scan speed - Nominal	20 deg/sec	20 deg/sec	20 deg/sec	20 deg/sec	10 deg/sec	10 deg/sec	10 deg/sec	10 deg/sec
Dimensional Information **)
Width	39" (1.0 m)	39" (1.0 m)	63" (1.6m)	49" (1.2 m)	60" (1.5 m)	69" (1.8 m)	69" (1.8 m)	120" (3m)
Depth	90" (2.3 m)	90" (2.3 m)	114" (2.9 m)	114" (2.9 m)	114" (2.9 m)	114" (2.9 m)	114" (2.9 m)	224" (5.7 m)
Height	59" (1.5 m)	100" (2.5 m)	120" (3.1 m)	153" (3.9 m)	195" (5.0 m)	270" (6.9 m)	319" (8.1 m)	700" (17.8 m)
Azimuth stage diameter	6" (0.15m)	6" (0.15m)	6" (0.15m)	12" (0.30m)	20" (0.5m)	20" (0.5m)	20" (0.5m)	20" (0.5m)
Azimuth stage load capacity (centered load)	1595 lbs (725 kg)	1595 lbs (725 kg)	1595 lbs (725 kg)	1595 lbs (725 kg)	10 000 lbs (4535 kg)	10 000 lbs (4535 kg)	10 000 lbs (4535 kg)	10 000 lbs (4535 kg)
AUT Bending Moment Allowed	35 lbs-ft (47 Nm)	35 lbs-ft (47 Nm)	35 lbs-ft (47 Nm)	300 lbs-ft (407 Nm)	10 000 lbs-ft (13558 Nm)	10 000 lbs-ft (13558 Nm)	10 000 lbs-ft (13558 Nm)	10 000 lbs-ft (13558 Nm)
Probe Carriage Capacity	10 lbs (4.5 kg)	20 lbs (9 kg)	50 lbs (23 kg)	50 lbs (23 kg)	125 lbs (57 kg)	125 lbs (57 kg)	175 lbs (80 kg)	175 lbs (80 kg)
System Weight	150 lbs (68 kg)	350 lbs (159 kg)	1400 lbs (636 kg)	1400 lbs (636 kg)	1500 lbs (680 kg)	4200 lbs (1905 kg)	4200 lbs (1905 kg)	11000 lbs (5000 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)	9' (2.7 m)	10' (3.0 m)	10' (3.0 m)	13' (4.0 m)
Depth	11' (3.4 m)	13' (4.0 m)	13' (4.0 m)	13' (4.0 m)	15' (4.5 m)	15' (4.5 m)	15' (4.5 m)	22' (6.7 m)
Height	9' (2.7 m)	12' (3.7 m)	13' (4.0 m)	15' (4.5 m)	20' (6.1 m)	26' (6.1 m)	30' (7.9 m)	62' (18.9 m)
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 polariztion 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. **) Exact dimensions are dependant on specific configurations, and as such may vary. For a quick index of all NSI scanners, click here