Cambium PTP 450, Configuration And User'S Manual

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PTP 450 Configuration and User Guide Site planning
4-10 pmp-0815 (August 2015)
Site planning
This section describes factors to be taken into account when choosing sites for the BHM or
BHS, power supplies, CMM4 (if applicable) and GPS antenna (if applicable).
BHM or BHS site selection
When selecting a site for the BHM or BHS, consider the following factors:

Height and location to ensure that people are kept away from the antenna; see
Calculated distances and power compliance margins on page 6-12 .

Height and location to achieve the best radio path.

Ability to meet the requirements specified in Grounding and lightning protection on
page 4-24 .

Aesthetics and planning permission issues.

Cable lengths; see Maximum cable lengths on page 4-10 .

The effect of strong winds on the installation; see Wind loading on page 4-11 .
Power supply site selection
When selecting a site for the BHM or BHS power supply, consider the following factors:

Indoor location with no possibility of condensation.

Availability of a mains electricity supply.

Accessibility for viewing status indicator LED and connecting Ethernet cables.

Cable lengths; see Maximum cable lengths on page 4-10 .
Maximum cable lengths
When installing PTP 450 Series BHMs or BHSs, the maximum permitted length of the
shielded copper Ethernet interface cable is 330 feet (100m) from BHM/BHS to their
associated power supplies or uGPS.
When receiving synchronization signalling from a uGPS module, see
Table 40 for maximum
synchronization cable lengths.
Table 40 Sync cable length specification
Configuration Maximum Cable
Length (feet) Maximum Cable
Length (meters)
UGPS powered via
external power source 330 100