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:
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.
5 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.
6 A voluntary WISPA sponsored database has been developed that allows operators and installers to register the location information of the UNII devices operating outdoors in the 5470 – 5725 MHz band within 35 km of any TDWR location (see http://www.spectrumbridge.com/udia/home.aspx). This database may be used by government agencies in order to expedite resolution of any interference to TDWRs.
7 For example, device software must not have any country code options or software configuration settings which allow an end user to modify the DFS operation or impact the performance of DFS. See KDB 594280.
8 The TCBs are not permitted to approve transmitters with radar detection capabilities. See KDB 628591.
9 The manufacturers may consider taking steps providing clear instructions to operators and installers of devices as to the need to comply with rules for use of the band, guidance on registration of devices and any other processes that are designed to avoid interference. They may use methods that include, but are not limited to, instructions in manuals, notification on product web pages and service bulletins issued for products in the field.
Table 1: TDWR Location Information*
STATE | CITY | LONGITUDE | LATITUDE | FREQUENCY | TERRAIN ELEVATION (MSL) [ft] | ANTENNA HEIGHT ABOVE TERRAIN [ft] |
---|---|---|---|---|---|---|
AZ | PHOENIX | W 112 09 46 | N 33 25 14 | 5610 MHz | 1024 | 64 |
CO | DENVER | W 104 31 35 | N 39 43 39 | 5615 MHz | 5643 | 64 |
FL | FT LAUDERDALE | W 08020 39 | N 26 08 36 | 5645 MHz | 7 | 113 |
FL | MIAMI | W 080 29 28 | N 25 45 27 | 5605 MHz | 10 | 113 |
FL | ORLANDO | W 081 19 33 | N 2820 37 | 5640 MHz | 72 | 97 |
FL | TAMPA | W 082 31 04 | N 27 51 35 | 5620 MHz | 14 | 80 |
FL | WEST PALM BEACH | W 080 16 23 | N 26 41 17 | 5615 MHz | 20 | 113 |
GS | ATLANTA | W 084 15 44 | N 33 38 48 | 5615 MHz | 962 | 113 |
IL | MCCOOK | W 087 51 31 | N 41 47 50 | 5615 MHz | 646 | 97 |
IL | CRESTWOOD | W 087 43 47 | N 41 39 05 | 5645 MHz | 663 | 113 |
IN | INDIANAPOLIS | W 086 26 08 | N 39 38 14 | 5605 MHz | 751 | 97 |
KS | WICHITA | W 097 26 13 | N 37 30 26 | 5603 MHz | 1270 | 80 |
KY | COVINGTON CINNCINNATI | W 084 34 48 | N 38 53 53 | 5610 MHz | 942 | 97 |
KY | LOUISVILLE | W 085 36 38 | N 38 02 45 | 5646 MHz | 617 | 113 |
LA | NEW ORLEANS | W 090 24 11 | N 30 01 18 | 5645 MHz | 2 | 97 |
MA | BOSTON | W 070 56 01 | N 42 09 30 | 5610 MHz | 151 | 113 |
MD | BRANYWINE | W 076 50 42 | N 38 41 43 | 5635 MHz | 233 | 113 |
MD | BENFIELD | W 076 37 48 | N 39 05 23 | 5645 MHz | 184 | 113 |
MD | CLINTON | W 076 57 43 | N 38 45 32 | 5615 MHz | 249 | 97 |
MI | DETROIT | W 083 30 54 | N 42 0640 | 5615 MHz | 656 | 113 |
MN | MINNEAPOLIS | W 092 55 58 | N 44 52 17 | 5610 MHz | 1040 | 80 |
MO | KANSAS CITY | W 094 44 31 | N 39 29 55 | 5605 MHz | 1040 | 64 |
MO | SAINT LOUIS | W 090 29 21 | N 38 4820 | 5610 MHz | 551 | 97 |
MS | DESOTO COUNTY | W 089 59 33 | N 34 53 45 | 5610 MHz | 371 | 113 |
NC | CHARLOTTE | W 080 53 06 | N 3520 14 | 5608 MHz | 757 | 113 |
NC | RALEIGH DURHAM | W 078 41 50 | N 36 00 07 | 5647 MHz | 400 | 113 |
NJ | WOODBRIDGE | W 074 16 13 | N40 35 37 | 5620 MHz | 19 | 113 |
NJ | PENNSAUKEN | W 075 04 12 | N 39 56 57 | 5610 MHz | 39 | 113 |
NV | LAS VEGAS | W 115 00 26 | N 36 08 37 | 5645 MHz | 1995 | 64 |
NY | FLOYD BENNETT FIELD | W 073 52 49 | N40 3520 | 5647 MHz | 8 | 97 |
OH | DAYTON | W 084 07 23 | N40 01 19 | 5640 MHz | 922 | 97 |
OH | CLEVELAND | W 082 00 28 | N 41 17 23 | 5645 MHz | 817 | 113 |
OH | COLUMBUS | W 082 42 55 | N40 0020 | 5605 MHz | 1037 | 113 |
OK | AERO. CTR TDWR #1 | W 097 37 31 | N 35 24 19 | 5610 MHz | 1285 | 80 |
OK | AERO. CTR TDWR #2 | W 097 37 43 | N 35 23 34 | 5620 MHz | 1293 | 97 |
OK | TULSA | W 095 49 34 | N 36 04 14 | 5605 MHz | 712 | 113 |
OK | OKLAHOMA CITY | W 097 30 36 | N 35 16 34 | 5603 MHz | 1195 | 64 |
PA | HANOVER | W 080 29 10 | N40 30 05 | 5615 MHz | 1266 | 113 |
PR | SAN JUAN | W 066 10 46 | N 18 28 26 | 5610 MHz | 59 | 113 |
TN | NASHVILLE | W 086 39 42 | N 35 58 47 | 5605 MHz | 722 | 97 |
TX | HOUSTON INTERCONTL | W 095 34 01 | N 30 03 54 | 5605 MHz | 154 | 97 |
TX | PEARLAND | W 095 14 30 | N 29 30 59 | 5645 MHz | 36 | 80 |
TX | DALLAS LOVE FIELD | W 096 58 06 | N 32 55 33 | 5608 MHz | 541 | 80 |
TX | LEWISVILLE DFW | W 096 55 05 | N 33 03 53 | 5640 MHz | 554 | 31 |
UT | SALT LAKE CITY | W 111 55 47 | N40 58 02 | 5610 MHz | 4219 | 80 |
VA | LEESBURG | W 077 31 46 | N 39 05 02 | 5605 MHz | 361 | 113 |
WI | MILWAUKEE | W 088 02 47 | N 42 49 10 | 5603 MHz | 820 | 113 |