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FCC Approval Statement
6 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
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industry-sponsored database with the appropriate information regarding the location
and operation of the device and installer information is included.6
Devices must meet all of the other requirements specified in Section 15.407, and it is
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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.7
All applications for equipment authorization must clearly show compliance with all
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of the technical requirements under worst case parameters, under user or operator
control, based on frame rates, listen/talk ratios and user data transfer conditions.
All the devices subject to the DFS requirements must be submitted to the Commission's
Laboratory Division for pre-grant testing and equipment authorization.8 The applicant
must ensure that all equipment authorization applications subject to this interim
procedure include appropriate attestations that the device has no option to change the
DFS parameters and that transmissions are disabled at least in the 5600 – 5650 MHz
band. The application must include the user's manual with the appropriate installation
and operations requirements for the installers and operators.
We are continuing to evaluate additional measures that may need to be taken to further
ensure against interference caused by 5 GHz outdoor wireless systems located near
airports. While manufacturers have an obligation to ensure that their equipment
complies with FCC rules, and must take steps to ensure their devices are unlikely to
cause harmful interference, Section 15.5 of the Commission's rules also places an
obligation on users of devices to avoid causing interference and to correct any
interference that may occur.
We encourage the manufacturers to include information for the users, including the
operators and installers, to ensure that they understand that it is incumbent on them to
cooperate with manufacturers to implement any changes necessary to facilitate
compliance.
7 Devices may be optionally designed not to transmit on channels which overlap 5570 –
5680 MHz instead of requiring installers to perform site-by-site adjustments. In that case
it is still required that the devices should be installed professionally and the procedures
for registering the device in the industry database should be included in the Users
Manual.
Altitude™ 4760 Series Access Point Installation Guide
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