34
Figure 19. Changing the polarization. Details vary depending on the antenna version.
In order to change the polarization of the antenna, the antenna feed has to be turned by 90 degrees. The
feed screws are opened slightly to allow turning of the feed. Note: when the waveguide opening is
horizontal (broadside up) the polarization is vertical.
Figure 20. Changing of ODU polarization.
The ODU has to be turned by 90 degrees so that the waveguide opening is aligned with the antenna
opening. In order to fit the antenna, the polarization guide pin has to be moved to the other available
position marked with V (for Vertical) or H (for Horizontal). Misalignment of the waveguide opening 0 to 90
degrees will cause additional loss of 0 to 40 dB.
ODU CABLE INSTALLATI ON
The ODU cable is typically similar to mobile base station antenna feeder, e.g. Draka ½ inch cable (RFA ½ -50)
with suitable high-quality water resistant connectors. Both ends are normally fitted with a flexible tail
cable with high-qaulity water-proof connectors.
To Next Page
Loading...
