Frequency Selection; Channel Width - Motorola PTP 250 User Manual

Regulatory planning

Frequency selection

The PTP 250 fully conforms to regional regulatory requirements for radar avoidance.
In regions that mandate DFS, the unit first ensures that there is no radar activity on a
given channel for a period of 60 seconds before radiating on that channel. Once a channel
has been selected for operation, the unit will continually monitor for radar activity on the
operating channel. If detected, it will immediately cease radiating and attempt to find a
new channel.
Radar avoidance requirements in the 5.4 GHz band are defined as follows:
•
For the EU: in specification EN 301-893 version V1.5.1.
Radar avoidance at 5.8 GHz is applicable to EU operation (not FCC/IC) and the
requirements are defined in EN 302 502.

Channel width

Select the required channel width for the link (20 MHz or 40 MHz). The wider channel has
the greater the capacity. As narrower channel widths take up less spectrum, selecting a
narrow channel width may be a better choice when operating in locations where the
spectrum is very busy.
2-4
UNDER DEVELOPMENT
Chapter 2: Planning considerations
phn-2182_003v004 (Oct 2011)