User's Manual

Table Of Contents
6 Site Planning
87
6 Site Planning
6.1 Site Survey and Link Planning
A site survey must be performed to identify all the obstructions (such as trees or buildings) in
the path and to assess the risk of interference. This information is important if you are to
achieve an accurate link feasibility assessment.
The PTP 600 Series are designed to operate in Non-Line-of-Sight (NLoS) and Line-of-Sight
(LoS) environments. Link planning enables a link of known quality to be installed. This
involves the acquisition of path profile data (using Motorola’s free LINKPlanner utility). The
LINKPlanner predicts data rates and reliability over the path. It allows the user to try different
antenna heights and RF power settings. When the link is installed, the mean path loss can be
checked to confirm that the predicted data rate and link reliability is achievable. Motorola
LINKPlanner is available to download from http://www.motorola.com/ptp/support.
6.2 Site Selection Criteria
The following are guidelines for selecting the installation location of the ODU and PIDU Plus
for a PTP 600 Series Bridge.
6.2.1 ODU
Site Selection
When selecting a site for the ODU the following should be taken into consideration:
It is not possible for people to stand or walk inadvertently in front of the antenna
Height and location to achieve the best radio path
Height in relation to other objects with regard to lightning strikes
Aesthetics and planning permission issues
Distance from the ODU and connected Network equipment (Maximum cable run from the
ODU to the connected equipment is 100m [330 ft])
Distance from the PIDU Plus to the ODU (Maximum cable run from the PIDU Plus to the
ODU is 300m [990 ft] when using the Fiber interface)
If using the GPS Sync Unit, ensure that it is exposed to an unobstructed path to the sky.
Please refer to the “GPS Synchronization Unit Kit” User Manual delivered with the kit.