Table of Contents
Advertisement
Step 10: Align the second antenna using the tones as described in section 7.7.11
" Aligning the ODUs ".
Step 11: Re-connect the second antenna to the Canopy 150/300 Mb BH-C (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.
14.8.10 Completing the Installation
The installation should be completed by checking all mounting nuts bolts and screws,
securing all cables and weatherproofing the installation.
Warning: Finally tightening of the antenna mountings may cause the antenna alignment to be
altered, due to distortion in the mounting bracket caused by action of tightening. It is
recommended that the installation tone be left turned on (armed) during this process so that
any movement can be noticed and counteracted by tightening the other side of the bracket.
14.8.11 Antenna Cable Fixing
Cables should be secured in place using cable ties, cleats or PVC tape. Care should be taken
to ensure that no undue strain is placed on the connectors on both the Canopy 150/300 Mb
BH-C 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.
14.8.12 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.
All joints should be weatherproofed using self-amalgamating tape. It is recommended that a
layer of PVC tape be placed over the self-amalgamating tape to protect the joint while the
self-amalgamating tape cures and give additional protection. Figure 100 shows this
diagrammatically for the Canopy 150/300 Mb BH-C unit end of the antenna cables. If the
antenna manufacturer has not supplied guidance on this matter, the same technique should
be employed at the antenna end of the cable.
Issue 1.1 April 2006
Drip loop
Figure 100: Forming a Drip Loop
Antenna
Page 148
Advertisement
Table of Contents
