Motorola PTP 500 User's Guide Page 93

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PTP 300 and PTP 500 Series User Guide Spectrum planning
phn-1115_006v000
Sep 2010
2-5
Avoidance of weather radars (USA only)
To comply with FCC rules, units which are installed within 35 km of a Terminal
Doppler Weather Radar (TDWR) system (or have a line of sight propagation path to
such a system) must be configured to avoid any frequency within +30 MHz or
–30 MHz of the frequency of the TDWR device.
When planning a link in the USA, visit http://spectrumbridge.com/
udrs/home.aspx
,
enter the location of the planned link and search for TDWR radars. If the search result
lists one or more TDWR radars within 35 km (22 miles), perform the following tasks:
Register the installation on http://spectrumbridge.com/
u
drs/home.aspx.
Make a list of channel center frequencies that must be barred, that is, those
falling within +30 MHz or –30 MHz of the frequency of the TDWR radars.
CAUTION
To comply with FCC rules, the affected channels must be barred during
staging, before the units are allowed to radiate on site, as described in
Chapter 6 Configuration and alignment.
Channel bandwidth
Select the required channel bandwidth for the link.
The channel bandwidth may be set to 5 MHz, 10 MHz or 15 MHz. The wider the
channel bandwidth, the greater the capacity.
As narrower channel bandwidths take up less spectrum, selecting a narrow channel
bandwidth may be a better choice when operating in locations where the spectrum is
very busy.
NOTE
Both ends of the link must be configured to operate on the same channel
bandwidth.
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