User's Guide

Regulatory planning Chapter 2: Planning considerations
2-2
UNDER DEVELOPMENT
phn-2182_003v004 (Oct 2011)
Regulatory planning
This section describes how to plan PTP 250 links to conform to the regulatory restrictions
that apply in the country of operation.
It is the responsibility of the user to ensure that the PTP product is operated in accordance
with local regulatory limits.
Contact the applicable radio regulator to find out whether or not registration of the
PTP 250 link is required.
Regulatory limits
The local regulator may restrict frequency usage and channel width, and may limit the
amount of conducted or radiated transmitter power. Table 2-1 contai
ns examples of the
regulatory limits that apply in typical countries of operation.
Many countries impose EIRP limits (Allowed EIRP) on products operating in the 5.4 GHz
and 5.8 GHz bands. These limits are calculated as follows:
• In the 5.4 GHz band (5470 MHz to 5725 MHz), the EIRP must not exceed the lesser of
30 dBm or (17 + 10 x Log Channel width in MHz) dBm.
• In the 5.8 GHz band (5725 MHz to 5875 MHz), the EIRP must not exceed the lesser of
36 dBm or (23 + 10 x Log Channel width in MHz) dBm.
Some countries (for example the USA) impose conducted power limits on products
operating in the 5.8 GHz band.
Table 2-1 Example of regulatory limits
Country Band Permitted
frequencies
Radar avoidance
(DFS) required?
Power limit
USA 5.4 GHz 5470 - 5600 MHz
5650 - 5725 MHz
Yes (*) 30 dBm EIRP
USA 5.8 GHz 5725 - 5825 MHz No 30 dBm
conducted
UK 5.4 GHz 5470 - 5600 MHz
5650 - 5725 MHz
Yes 30 dBm EIRP
Denmark 5.8 GHz 5725 - 5795 MHz
5815 - 5875 MHz
Yes 36 dBm EIRP
(*) See also Avoidance of weather radars (USA only) on page 2-5.