Chapter 6: Configuration and alignment
Aligning antennas
Page 6-120
5 When the antennas have been aligned on the center of the beam, verify that the receive level
is within the predicted range (from the installation report). If this is not the case, go back to
step 2.
The current value of receive level can be verified by using the graphical installation method
(see
) or by selecting menu option Status and monitoring
the Receive Power attribute on the System Status page.
6 If after repeated attempts to align, the receive level still does not lie within the predicted
range, this may be because the data provided to the prediction tool (such as LINKPlanner) is
inaccurate. For example estimates of path obstructions, antenna heights or site locations may
be inaccurate. Check this data and update the prediction as necessary.
7 Once the antennas have been aligned correctly, tighten the integrated ODU (or connectorized
antenna) mountings. To ensure that the action of tightening does not alter antenna alignment,
continue to monitor received signal level.
Aligning separate antennas for spatial diversity
Use this procedure if a connectorized ODU is installed at either site with two separate antennas
for spatial diversity.
Procedure:
1
Connect the horizontal polarization antenna to the ODU, disconnect the vertical polarization
antenna, then perform
2
Connect the vertical polarization antenna to the ODU, disconnect the horizontal polarization
antenna, then perform
3
Re-connect the horizontal polarization antennas. The received signal level should increase.
4
Weatherproof the antenna connections at the “H” and “V” interfaces of the ODUs, as
described in
Weatherproofing an N type connector
