Chapter 5: Installation
Installing the ODU
Page 5-8
Install external antennas for a connectorized ODU
To mount and connect an external antenna for the connectorized ODU, proceed as follows:
1 Mount the antenna(s) according to manufacturer’s instructions. When using separate antennas to
achieve spatial diversity, mount one with Horizontal polarization and the other with Vertical
polarization.
2 Connect the ODU V and H interfaces to the antenna(s) with RF cable of type LMR-400 (Cambium
part numbers 30010194001 and 30010195001) and N type connectors (Cambium part number
09010091001). Tighten the N type connectors to a torque setting of 1.7 Nm (1.3 lb ft).
3 If the ODU is mounted indoors, install lightning arrestors at the building entry point:
4 Form drip loops near the lower ends of the antenna cables. These ensure that water is not
channeled towards the connectors.
5 If the ODU is mounted outdoors, weatherproof the N type connectors (when antenna alignment
is complete) using PVC tape and self-amalgamating rubber tape.
6 Weatherproof the antenna connectors in the same way (unless the antenna manufacturer
specifies a different method).
7 Ground the antenna cables to the supporting structure within 0.3 meters (1 foot) of the ODU and
antennas using the Cambium grounding kit (part number 01010419001):
8 Fix the antenna cables to the supporting structure using site approved methods. Ensure that no
undue strain is placed on the ODU or antenna connectors. Ensure that the cables do not flap in
the wind, as flapping cables are prone to damage and induce unwanted vibrations in the
supporting structure.
PTP 550 ground cable