SeaSpace TeraScan 1.5M, Operation And Maintenance Manual

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152
SeaSpace Corporation
8.5 C
ALIBRATION AND
A
DJUSTMENT
P
ROCEDURES
8.5.1 Balancing the Antenna
Tools:
" nut driver
6" crescent wrench
Procedure:
1. Place the antenna dish at 0º elevation (horizontally). Add or subtract trim weights to the right or left
side of the antenna at the dish or on the counter-balance area of the frame behind the dish until the
cross-level beam is balanced. Use 1-oz or ½-oz weights with ¼-20 cap screws.
2. Move the dish to 90º elevation. If the dish drifts, redistribute the weights. Note: Do not add new
weights.
3. Return to Step 1 and recheck the drift at 0º elevation.
4. When properly balanced, the positioner should not move in any direction when the dish is placed at
any elevation. The cross-level beam should remain level.
7 16
⁄
F
IGURE
8-22:
Balancing the Antenna (View of Right Elevation Pan)
Trim Weights