User's Guide

Link planning Chapter 2: Planning considerations
2-10
UNDER DEVELOPMENT
phn-2182_003v004 (Oct 2011)
Link planning
This section describes factors to be taken into account when planning links, such as range,
obstacles and path loss. PTP LINKPlanner is recommended.
Range and obstacles
Calculate the range of the link and identify any obstacles that may affect radio
performance.
Perform a survey to identify all the obstructions (such as trees or buildings) in the path
and to assess the risk of interference. This information is necessary in order to achieve an
accurate link feasibility assessment.
When higher gain connectorized antennas are used, reduce the transmit power to ensure
that the receiver signal level does not exceed -20 dBm.
PTP LINKPlanner
The Motorola PTP LINKPlanner software and user guide may be downloaded from
http://www.motorola.com/ptp/support.
PTP LINKPlanner imports path profiles and predicts data rates and reliability over the
path. It allows the system designer to try different antenna heights and RF power settings.
It outputs an installation report that defines the parameters to be used for configuration,
alignment and operation. The installation report can be used to compare the predicted and
actual performance of the link.