User guide

45 Mbps Backhaul User Guide
Issue 3, December 2004 Page 104 of 113
Step 6: Connect the 45 Mbps Backhaul ODU to PIDU cable and configure the unit as
described in section 5.7 ”Connecting Up”.
Step 7: Align the connected antenna using the tones as described in section 5.7.9
“Aligning the ODUs”.
Step 8: Connect the other antenna to the 45 Mbps Backhaul unit.
Step 9: Disconnect the cable to the already aligned antenna.
Step 10: Align the second antenna using the tones as described in section 5.7.9 “Aligning
the ODUs”.
Step 11: Re-connect the second antenna to the 45 Mbps Backhaul (Note: you will notice
the tone pitch increase as you re-connect the second antenna due to the
additional received signal).
Step 12: Use the relevant status web pages to check that you are getting the results you
expect from your link planning.
Step 13: Complete the installation as detailed below.
11.8.7 Completing the Installation
The installation should be completed by checking all mounting nuts bolts and screws, securing all cables and
weatherproofing the installation.
Important! Final tightening of the antenna mountings may cause the antenna alignment to be altered due to
distortion in the mounting bracket caused by tightening. It is recommended that the installation tone be left
turned on (armed) during this process so that any movement can be noticed and counter acted by tightening the
other side of the bracket.
11.8.7.1 Antenna Cable Fixing
Cables should be secured in place using cable ties, cleats or premium vinyl electrical tape. Care should be taken
to ensure that no undue strain is placed on the connectors on both the 45 Mbps Backhaul unit and the Antennas
and also to ensure that the cables do not flap in the wind. Cables flapping in the wind are prone to damage and
induce unwanted vibrations in the mast to which the units are attached.
11.8.7.2 Antenna Connection Weatherproofing
Where a cable connects to an antenna or unit from above, a drip loop should be left to ensure that water is not
constantly channeled towards the connector.