ViaSat 8116 Series, Инструкция по установке и эксплуатации

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MECHANICAL ALIGNMENT SPECIFICATION AND REPORT
FOR 16 AND 18 METER LIMITED MOTION ANTENNA
Antenna size _________ meters. ViaSat program manager __________________________________
Customer _________________________________ Installation location __________________________________
5.0 PANEL/FEED MOUNTING RING AND THEODOLITE ALIGNMENT
The azimuth bearing and elevation axis have been aligned according to steps 2 and 3 above, and the hub positioned to 90
degrees elevation. The theodolite mount and theodolite have been installed to the panel/feed mounting ring. The
theodolite azimuth axis should be perpendicular to the panel/feed mounting ring, by sighting a machine scale, to within
30 arc seconds (0.005 inches), at three points on the ring 120 degrees apart.
Theodolite azimuth axis deviation from perpendicular to panel mounting ring __________ seconds/inches.
Theodolite elevation axis average height from panel/feed mounting ring should be 10.75 ± 0.01 inches.
Theodolite elevation axis measured average height ____________ inches.
Panel mounting hole pattern in panel/feed mounting ring should be aligned with truss mounting hole pattern in hub to
within 0.01 inches (70 arc seconds).
Panel hole pattern alignment to truss hole pattern ___________ inches/arc seconds. (Circle one).
Panel/feed mounting ring should be level in hub to within 1 division (.005 inches per foot) on a Starret no. 98 level.
Panel/feed mounting ring level deviation ____________ divisions
Above measurements and alignments are verified with all hub and panel/feed mounting ring installation hardware torqued
to specification.
ViaSat Rep._________________________________________
Date:____________________
6.0 TRUSS ALIGNMENT
Trusses (radials) are spaced at 15 degree angular increments. Angular (lateral) truss alignment error should be less than
3'-30" of arc (0.38 inches) from the panel mounting holes in the panel/feed mounting ring, for all 24 trusses.
Peak radial error at inner-to-outer truss interface ___________ minutes-seconds/inches. (Circle one).
Peak radial error at truss tips ___________ minutes-seconds/inches. (Circle one).
Truss tip elevation angle is measured at the upper edge of the outer panel adjuster slots of each truss. Truss tip elevation
(vertical) error should be less than 04'-20" of arc (0.50 inches) for all 24 trusses. Truss tip elevations are:
16 Meter Antenna: 72
°
04'42"
18 Meter Antenna: 69
°
13'12"
Peak truss tip elevation error ___________ minutes-seconds/inches. (Circle one).
ViaSat Rep._________________________________________
Date:____________________
May 15, 1996 ViaSat 479820A
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