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FEDERAL COMMUNICATIONS COMMISSION
ENFORCEMENT BUREAU
Region Three
Los Angeles Regional Office
11331 183’rd St
PMB #365
Cerritos, CA 90703
Field@FCC.gov
(562) 860-7474
April 27, 2018
LV.Net
Las Vegas, NV 89104
Case Number:  EB-FIELDWR-17-00024915
NOTICE OF UNLICENSED OPERATION AND
NOTIFICATION OF HARMFUL INTERFERENCE
The Federal Communications Commission (FCC or Commission) received a complaint from the 
Federal Aviation Administration (FAA) concerning interference to their Terminal Doppler 
Weather Radar (TDWR) operating on 5645 MHz in Las Vegas, Nevada.  On September 6, 2017, 
Agents from the Los Angeles Office of the FCC’s Enforcement Bureau (Bureau) conducted an 
investigation and determined that the source of the interference to FAA’s TDWR was a 
wideband signal centered on 5660 MHz.  The signal was emanating from an antenna connected 
to a Ubiquiti Prism Rocket 5AC transmitter on the roof of a hotel in Henderson, Nevada operated 
by LV.Net.  After the Agents notified LV.Net of the interference issue, LV.Net changed the 
frequency of the transmitter to 5575 MHz.  Soon after, the Agents verified the interference to the 
TDWR had ceased.
Radio stations must be licensed by the FCC pursuant to Section 301 of the Communications Act 
of 1934, as amended (Act).
1
  The only exception to this licensing requirement is for certain 
transmitters using or operating at a power level or mode of operation that complies with the 
standards established in Part 15 of the Commission’s rules.
2
  Non-licensed operation pursuant to 
Part 15 of the Commission’s rules, however, is conditioned upon compliance with all applicable 
regulations in the subpart.
3 
 All intentional radiators operating pursuant to Part 15 of the FCC’s 
rules must be certified for use as a Part 15 device,
4 
and failure to operate such device consistent 
with its authorization violates Part 15 of the Commission’s rules. 
The investigation determined the transmitter was certified as a Part 15 device and labeled with 
FCC ID: SWX-R5ACPRISM.  However, FCC records indicate the transmitter is authorized to 
1 
47 U.S.C. § 301.  
2 
47 CFR § 15.1, et seq.
3 
47 C.F.R. § 15.1(b).
4
 47 C.F.R. § 15.201(b).
operate only on frequencies between 5735-5840 MHz.  Accordingly, your operation of the 
Ubiquiti Prism Rocket 5AC, FCC ID: SWX-R5ACPRISM on the frequencies 5575 and 5660 
MHz do not comply with the requirements of Part 15 of the FCC’s rules, and the FCC has no 
record of a license being issued to you to operate a transmitter on either 5575 or 5660 MHz in 
Henderson, NV.  Thus, your operation was in violation of 47 U.S.C. § 301 and Part 15 of the 
FCC’s rules.
Had the transmitter been certified for operation on 5660 MHz, additional conditions apply.  Non-
licensed operation of a Part 15 device is subject to the condition that it must not cause harmful 
interference and, if harmful interference occurs, operation of the device must cease.
5
.  Harmful 
interference is defined as “[a]ny emission, radiation or induction that endangers the functioning 
of a radio navigation service or of other safety services or seriously degrades, obstructs or 
repeatedly interrupts a radio communications service operating in accordance with this 
chapter.”6 
You are hereby notified that your Ubiquiti Prism Rocket 5AC device operating on 5660 MHz 
was causing harmful interference to the FAA TDWR in Las Vegas, Nevada and that your 
operation of this Unlicensed National Information Infrastructure (U-NII) device must not resume 
until the interference can be resolved.  You are also warned that a U-NII device’s FCC 
equipment authorization is no longer valid if the device (a) has been installed or configured in a 
way to defeat the Dynamic Frequency Selection radar detection mechanism, (b) uses antennas 
other than those certified for the device and/or (c) has been modified in a manner that enables the 
device to operate outside of its authorized operating parameters.  Any unauthorized changes may 
invalidate the grant of equipment authorization.  Using uncertified U-NII devices, or certified U-
NII devices in a non-compliant manner, violates provisions of Part 15 of the Commission’s 
rules.
7
   
Operation of radio transmitting equipment without a valid FCC authorization or license is a 
violation of Section 301 of the Act
8
 and may subject the responsible parties to substantial 
monetary fines, in rem arrest action against the offending radio equipment, and criminal 
sanctions including imprisonment.
9
  Because unlicensed operation creates a danger of 
interference to important radio communications services and may subject the operator to severe 
penalties, this letter emphasizes the importance of complying strictly with these legal 
requirements. 
OPERATION OF A U-NII DEVICE THAT IS OPERATING WITH PARAMETERS 
OUTSIDE ITS GRANT OF CERTIFICATION MUST CEASE IMMEDIATELY.
OPERATION OF THIS DEVICE MAY NOT RESUME UNTIL YOU RESOLVE THE 
HARMFUL INTERFERENCE.
You have ten (10) days from the date of this notice to respond concerning your operation of this 
Part 15 device.  Your response should describe the steps you are taking to avoid operating on 
5 
47 CFR §§ 15.5(c), 15.405.
6 
47 C.F.R. § 15.3(m).
7 
47 CFR § 15.1(c).
8
 47 U.S.C. § 301.
9
 See 47 U.S.C. §§ 401, 501, 503 and 510
unauthorized frequencies, and preventing future interference to the FAA TDWR.  Your response 
should be sent to the address in the letterhead and reference the listed case number.  Under the 
Privacy Act of 1974, 5 U.S.C. § 552a(e)(3), we are informing you that the Commission’s staff 
will use all relevant material information before it to determine what, if any, enforcement action 
is required to ensure your compliance with FCC rules.  This will include any information that 
you disclose in your reply.
You may contact this office if you have any questions.
Lark Hadley
Regional Director
Region Three
Enforcement Bureau