Motorola PMP 320 User Manual page 18

Using standard work and safety practices for tower climbing, connect the assembled unit
5.
(assembled antenna, brackets, and radio) to a pole, mounting fixture, or the tower. Mount
the unit so as to avoid accidental touching by personnel. Typically this me
the unit at least 4 m (13 ft) above ground level.
Procedure 2: Cabling and Grounding/Earthing the AP
Standard installation practices apply, including
use shielded Ethernet cable for all infrastructure cabling
o
use drip loops
o
provide extra cable (a splice loop) for future use at any termination
o
ensure the tower or structure is fully grounded (Protective Earth – PE)
o
1. Use dielectric grease (which is uniformly non-conducting) on all connections and in all
RJ-45 Ethernet connectors. The best practice is to use enough grease to fill the RJ-45
female connector, and then insert the RJ-45 male connector and push the grease
further into the unit and around the RJ-45 connector. Excess grease can be wiped over
the connector area to provide some resistance to water ingress around the connector.
Run a 10 AWG ground strap from the ground lug on the AP (see Error! Reference source not
found.) to known good ground (Protective Earth - PE).
The AP has metal‐to‐metal contact from the tower or support structure, through the antenna,
through the coax cable, to the radio. Installing surge suppression at the AP is strongly
recommended to provide the best protection from nearby lightning strikes.
Up to four 600SS surge suppressors may be mounted in series on an Ethernet link without
degrading the link. The equivalent of a 600SS is built into each of the 8 ports on a CMM4 and
counts as one of the four.
As an example, a typical installation might have properly‐grounded 600SS units within 3 ft (1 m)
of each AP and additional properly‐grounded 600SS units on each Ethernet cable mounted
outside at the point of cable entry to a telecommunications hut that contains the CMM4.
ans mounting
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