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(Please see the links later in this document to WISPA database with TDWR
locations.)
d) When within 35 km distance of a TDWR, the center frequency of the WLAN
must be separated from the TDWR center frequency by 30 MHz.
a.
If the radar is operating from 5600-5610 MHz, disable the use of channel
116 (5580 MHz).
b.
If the radar is operating from 5630-5650 MHz, disable the use of channel
132 (5660 MHz).
Note: Cisco will be disabling channels 116 and 132 for outdoor systems in the
future, the instructions in (d) only applies to systems that currently have the
channels enabled.
e) Additional mitigation techniques can include first, not orienting the antennas
in the main beam of the weather radar, and second, ensuring that the antenna is not
positioned in line-of-sight of the FAA TDWR.
f)
Verify that the antennas used are approved for use with Cisco WLAN systems.
Installers or operators using non-approved antennas or making any unauthorized
changes may be subject to enforcement action.
g) Operation in the 5150-5250MHz is restricted to indoor use only.
Installers and operators shall consult the Wireless Internet Service Providers
Association (WISPA) database to determine if they are within 35 km of the Terminal
Doppler Weather Radar (TDWR), as well as to register the system if operating within
this range of the TDWR.
3. Installation location
The product shall be installed at a location where the radiating antenna can
be kept 36cm from nearby person in normal operation condition to meet
regulatory RF exposure requirement.
4. External antenna
Use only the antennas which have been approved by the applicant. The
non-approved antenna(s) may produce unwanted spurious or excessive RF
transmitting power which may lead to the violation of FCC limit and is
prohibited.
5. Installation procedure
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