User's Manual

Spectrum planning Chapter 2 Planning considerations
phn-2182_002v000
2-2
May 2011
Spectrum planning
This section describes the regulatory restrictions that affect radio spectrum usage.
Each frequency variant has specific regulatory restrictions that affect frequency range,
radar avoidance and channel width usage.
Available spectrum
Ensure the link is configured to conform to local regulatory requirements.
The available spectrum for operation depends on the country of operation:
• The 5.4 GHz band is available in all EU countries.
• The 5.8 GHz band is currently only available in a limited number of EU countries
(UK, Eire, Norway, Denmark, Germany and Spain).
Certain regulations have allocated certain channels as unavailable for use:
• Europe has allocated part of the 5.4 GHz band to weather radar.
• The UK and some other European countries have allocated part of the 5.8 GHz
band to Road Transport and Traffic Telematics (RTTT) systems.
For examples of these restrictions, refer to Examples of regulatory limits on
page 4-32.
Where regulatory restrictions apply to certain channels, these channels are barred
automatically by the use of the correct country setting. For example, at 5.8 GHz in the
UK and some other European countries, the RTTT band 5795 MHz to 5815 MHz is
barred. With the appropriate configuration for a country in this region, the PTP 250
will not operate on channels within this band.
The number and identity of channels barred by the country selection is dependent on
the channel width selected.
NOTE
For the connectorized model, when using external antennas of higher gain
than the appropriate integrated antenna, the regulations may require the
maximum transmit power to be reduced. To ensure that regulatory
requirements are met for connectorized installations, refer to Calculating
EIRP f
or connectorized units on page 4-30.