9500 MXC User Manual
3DB 23063 ADAA - Rev 004 July 2007 Vol. III-5-5
Standard Alignment Procedure
To align an antenna:
1. Loosen the azimuth adjuster on the antenna mount (horizontal angle) and
adjust azimuth position for maximum signal strength.
2. Tighten the azimuth securing mechanism. Ensure signal strength does not
drop as it is tightened.
3. Loosen the elevation adjuster (vertical angle) and adjust for maximum signal
strength.
4. Tighten the elevation securing mechanism. Ensure signal strength does not
drop as it is tightened.
The terminal is now aligned and ready to carry operational traffic.
5. Record RSL and/or RSSI voltage in the commissioning log.
Additional Procedures for a Protected Link
• For a hot standby link, one RAC/ODU is transmitting, and at the receive end
both are receiving. The ODUs at each end are normally coupled to a common
antenna using an equal or unequal loss coupler.
• For a space diversity link, one RAC/ODU is transmitting, and at the receive end
both are receiving. Each ODU has its own antenna. Normally the top antenna is
assigned as primary, and the lower as secondary.
• With frequency diversity, the two links operate independently from a radio-path
perspective, and the ODUs at each end are normally coupled to a common
antenna using an equal loss coupler.
• With ring protection, each link in the ring normally operates as 1+0, though can
be 1+1 protected. 1+1 protection of ring links is employed where path
protection (diversity) is required, for which space diversity or frequency can be
installed.
• Both receivers of a hot-standby or diversity link can be accessed to provide
RSL/RSSI data regardless of which RAC is Rx online. (Rx online defines
which RAC is passing traffic to the backplane bus).
Ensure antennas are aligned on the main beam, and not a side lobe. For
guidance, refer to the sections Locating the Main Beam on page 5-18 and
Tracking Path Error on page 5-19.
Ensure ATPC is turned off during the alignment procedure.
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