Datasheet

Product Compatibility 2-3
2.2 FCC Approval Statement
Federal Communications Commission
Office of Engineering and Technology
Laboratory Division
Interim Plans to Approve UNII Devices Operating in the 5470 - 5725 MHz Band with Radar
Detection and DFS Capabilities
The FCC, NTIA, FAA and industry are working to resolve interference to Terminal Doppler Weather Radar
(TDWR) systems used near airports that has occurred from some outdoor wireless systems operating in the
5470 MHz – 5725 MHz band. These wireless devices are subject to Section 15.407 of our rules and when
operating as a master device they are required to implement radar detection and DFS functions. We are
continuing our work to develop long-term equipment authorization test procedures that will ensure that the
devices comply with our rules that include protecting the TDWR operations. In the interim, the Commission
will now allow certification of wireless master devices with radar detection function and with DFS capability,
if they meet the following conditions:
• Devices will not transmit on channels which overlap the 5600 – 5650 MHz band.
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• Devices intended for outdoor use will be further restricted, as follows:
• Devices must be professionally installed when operating in the 5470 – 5725 MHz band.
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• Grantees must provide owners, operators and all such installers with specific instructions in their
user’s manual on requirements to avoid interference to TDWRs and information that meets the
following instructions:
• Any installation of either a master or a client device within 35 km of a TDWR location shall be
separated by at least 30 MHz (center-to-center) from the TDWR operating frequency (as shown in
the attached table)
3
,
4
, and
5
.
1
The devices subject to the requirements in this KDB can select the initial channel for operation to avoid
TDWRs and apply the Uniform Channel Spreading requirements (see FCC 06-96 in ET Docket 03-122 released
June 30, 2006) on the remaining available frequency band of operation. All the other test procedures
including the test radar patterns remain the same at the present time. A revision to the measurement
procedure with modification to the Uniform Channel Spreading requirement and other changes will be
released in the future. The Commission will also address the issue of any field upgrade option at that time.
2
The grantee must identify the specific expertise and the training required by the installers for installing
these types of devices.
3
In some instances it is possible that a device may be within 35 km of multiple TDWRs. In this case the
device must ensure that it avoids operation within 30 MHz for each of the TDWRs. This requirement applies
even if the master is outside the 35 km radius but communicates with outdoor clients which may be within
the 35 km radius of the TDWRs.
4
The requirement for ensuring 30 MHz frequency separation is based on the best information available to
date. If interference is not eliminated, a distance limitation based on line-of-sight from TDWR will need to
be used. In addition, devices with bandwidths greater than 20 MHz may require greater frequency
separation.
• Procedures for the installers and the operators on how to register the devices in the industry-sponsored
database with the appropriate information regarding the location and operation of the device and
installer information is included.
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• Devices must meet all of the other requirements specified in Section 15.407, and it is prohibited to
include configuration controls (e.g. country code settings or other options to modify DFS functions) to
change the frequency of operations to any frequency other than those specified on the grant of
certification for US operation.
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