Hughes AN6-098P Manuale Utente

 

To set polarization for the cradle-type radio, you adjust the radio, 
not the antenna. This section explains how to calculate and set the 
polarization value for the cradle-type radio assembly.

To calculate the polarization setting, refer to the section for the 
type of uplink and downlink that will be used. In these 
instructions, SBC initial value refers to the polarization value 
calculated by the installation software.

To calculate the radio polarization setting for a horizontal 
uplink / vertical downlink:

1. Multiply the SBC initial value by –1, 

 

then offset the result by 90° as follows:
If the SBC initial value is positive, add 90.

 

If the SBC initial value is negative, subtract 90.

 

    41 × –1 = –41

 

    Add 90:

 

    –41 + 90 = 49 

 

    Radio polarization setting = 49°

 

    –41 × –1 = 41

 

    Subtract 90:

 

    41 – 90 = –49

 

    Radio polarization setting = –49°.

2. Make a note of the setting.
3. Go to Setting the radio polarization on page 48.

To calculate the radio polarization setting for a vertical 
uplink /  horizontal downlink:

1. Multiply the SBC initial value by –1 (with no offset).

 
Example 1, SBC initial value of 38°

 

    38 × –1 = –38

 

    Radio polarization setting = –38°.

 

    –38 × –1 = 38

 

    Radio polarization setting = 38°.

2. Make a note of the setting.
3. Go to Setting the radio polarization on page 48.