ORBIT FR Field Probes - Manual (Page 10)

Source Towers
Obtaining Best Results When Using An Aperture Field Probe AL-5000 Series
ORBIT/FR Source Towers allow the positioning of radiation sources at
selected heights in an elevated antenna testing system. The transmitting
antenna is easily installed and adjusted on the built-in carriage of the tower.
The track-guided, vertical motion of the carriage is achieved by a motor-driven
cable and pulley combination.
Two standard tower heights are offered. However, the tower's modular design
makes customer selected heights also available. Coarse and fine height
values are measured and monitored by a dual speed synchro system (36:1,
1:1). To avoid over travel, adjustable upper and lower limit switches are
incorporated. Tachometers are provided to enable speed regulation and
control. The carriage is compatible with ORBIT/FR Series 8000 Mounting
Fixtures, to which polarization positioners may be attached.
The vertical motion is controlled and monitored by standard ORBIT/FR power
control and display units. For long distance control, the AL-4706-3B fiber-optic
controller may be used. ORBIT/FR Source Towers are shipped in compact
modular units, ready for assembly at the customer site.
AL-5006-1
AL-5004-1 AL-5006-1
Height mm 7,315 12,801
ft 24 42
Carriage
Travel
mm 5,486 10,973
ft 18 36
Bending
Moment
m-kg 675 675
ft-lbs 5,000 5,000
kg 115 386
Vertical Load
lbs 253 850
Drive Power hp 4-Mar 4-Mar
Max. Speed
m/min 2.3 2.3
ft/min 7.5 7.5
Weight
kg 1,405 2,495
lbs 3,100 5,500
Notes:
1. Consult ORBIT/FR for special options.
2. Vertical travel measured by dual speed synchro transducers (36:1, 1:1).
Specifications:
Ordering Information
Supplied Accessories
Options