User's Guide

Site planning Chapter 2: Planning considerations
2-6
UNDER DEVELOPMENT
phn-2182_003v004 (Oct 2011)
Site planning
This section describes factors to be taken into account when choosing sites for the ODU
and PoE power supply.
ODU site selection
When selecting a site for the ODU, 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 pag
e 4-10.
• Height and location to achieve the best radio path.
• Ability to meet the requirements specified in Grounding and lightning protection on
page 2-15.
• Aesthetics
and planning permission issues.
• Cable lengths; see Maximum cable lengths on
page 2-7.
• The effect of strong winds on the installation; see Wind loading on pa
ge 2-7.
Power supply selection
Select a suitable power supply unit for the PTP 250. The only supported units are the PoE
power supply (included in PTP 250 kits) or the PTP 300/500/600 Series PIDU. The PoE
power supply is suitable for the majority of installations, but the PIDU is required in the
following situations:
• When a -48 V DC power supply is required, either as the primary supply or as a backup
to the AC mains.
• When an extended operating temperature range is required for the mains powering
system, for example when the indoor equipment is in a building without temperature
control or air conditioning.
For PIDU ordering information, see Alternative components on
page 2-34.
The power supply unit must be installed in an indoor location with no possibility of
condensation, with an ambient temperature within the specified operating range of the
product; see Power supply unit specifications on page 4-3.