Hughes AN4-074-DF Manual Do Utilizador

 

7. While watching the signal strength number to ensure that it 

stays at maximum, tighten the elevation nuts in the following 
sequence:
a. Snug the left nut but do not completely tighten it.
b. Snug the right nut but do not completely tighten it.
c. Fully tighten the left nut (torque to 12 ft-lbf).
d. Fully tighten the right nut (torque to 12 ft-lbf).

Adjusting polarization Polarization refers to rotation of the antenna (as shown in 

Figure 44) and is measured in degrees from zero (no rotation), 
positive or negative. Polarization is positive east of the satellite 
longitude and negative west of the satellite longitude.

Figure 44 illustrates how you adjust the antenna’s polarization by 
rotating the antenna. 

To adjust polarization, follow these steps:

1. Fine-tune the polarization setting by loosening the 

polarization nuts just enough to enable you to rotate the 
antenna reflector a few degrees in each direction. If the signal 
strength does not change, set the polarization to the value 
calculated by the installation software. Otherwise, set the 
polarization at the setting where you peaked the signal.

2. While monitoring the signal strength number to ensure that it 

stays at maximum, tighten the polarization nuts.

Figure 44:  Adjusting elevation

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