FEDERAL COMMUNICATIONS COMMISSION
ENFORCEMENT BUREAU
Region 2
Miami Office
P.O. Box 266468
Weston, FL 33326
July 13, 2016
Wide Cloud Communications
Hialeah, Florida
NOTIFICATION OF HARMFUL INTERFERENCE  
Case Number:  EB-FIELDSCR-16-00021831
Document Number: W201632600019
The Miami Office, in response to a complaint from the Federal Aviation Administration (FAA) 
that its Terminal Doppler Weather Radar (TDWR) serving the Fort Lauderdale-Hollywood 
International Airport (FLL) was experiencing harmful interference from radio emissions on or 
adjacent to the TDWR frequency of 5645 MHz, conducted an investigation in the area.  On July 
6, 2016, an agent from this office confirmed by direction finding techniques that radio emissions 
on the frequency band 5655 - 5675 MHz were emanating from one of your wireless transmitters 
located on the roof of 1840 W. 49
th
St, Hialeah, FL 33012.  Wide Cloud Communications 
personnel confirmed that it was operating a Ubiquiti Rocket M5 Unlicensed National 
Information Infrastructure (U-NII) device on the frequency band 5655 – 5675 MHz, and agreed 
to change the operating frequency when notified of the interference.  The interference to the 
TDWR then ceased. 
Nonlicensed operation of a U-NII device is subject to the condition that it must not cause 
harmful interference and, if harmful interference occurs, operation of the device must cease.  See
47 C.F.R. §§ 15.5(c), 15.405.   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.”  47 
C.F.R. § 15.3(m).
Your operation of a U-NII device on 5655 – 5675 MHz caused harmful interference to the 
TDWR serving Fort Lauderdale-Hollywood International Airport and your operation of this
device on these frequencies must not resume.  You are also warned that operation of otherwise
authorized equipment that continues to cause harmful interference after your receipt of this 
warning, constitutes a violation of Federal law and could subject the operator to severe penalties, 
including, but not limited to, substantial monetary fines, in rem arrest action against the 
offending radio equipment, and criminal sanctions including imprisonment.  (see 47 U.S.C. §§ 
301, 401, 501, 503 and 510).
NONLICENSED OPERATION OF U-NII DEVICES, AT ANY SITE, THAT CAUSE 
INTERFERENCE TO ANY TDWR OR OTHER LICENSED RADIO 
COMMUNCIATIONS SERVICE MUST NOT RESUME.  NONLICENSED OPERATION 
OF U-NII DEVICES MAY NOT RESUME UNLESS YOU ARE IN FULL COMPLIANCE 
WITH PART 15 OF THE FCC’S RULES.
You have ten (10) days from the date of this notice to respond with any evidence that your 
transmitters were not the source of the interference to the FLL TDWR.  Your response should 
also describe the steps you are taking to ensure that none of your U-NII devices interfere with the 
TDWRs serving the Fort Lauderdale-Hollywood and Miami International Airports.  Your 
response should be sent to the address in the letterhead and reference the listed case number and 
document 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.
Ronald Ramage
Regional Director
Attachments:
Excerpts from the Communications Act of 1934, As Amended
Enforcement Bureau, "Inspection Fact Sheet," March 2005
Joint OET and EB Memo dated July 27, 2010 regarding interference to Terminal Doppler 
Weather Radars
FCC Enforcement Advisory, “TDWR and U-NII Devices” dated September 27, 2012, DA 12-459