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FCC Part 15 Radio Frequency Devices
Section 15.517

The Federal Communications Commission (FCC) is the authority in the United States of America that creates and enforces the use of airwaves throughout the entire radio frequency spectrum. This group of documents contains the entirety of the FCC Part 15 regulations that concern unlicensed radio frequency devices. As with all government documents, this material is in the public domain and may be freely copied so long as the content is not changed. This copy is provided as a convenience for RF Cafe visitors. 

Click here for the Table of Contents.

 
[Code of Federal Regulations]
[Title 47, Volume 1]
[Revised as of October 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 47CFR15.517]
[Page 844-845]
 
                       TITLE 47--TELECOMMUNICATION
 
              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
 
PART 15_RADIO FREQUENCY DEVICES--Table of Contents
 
                   Subpart F_Ultra-Wideband Operation
 
Sec. 15.517  Technical requirements for indoor UWB systems.
    (a) Operation under the provisions of this section is limited to UWB 
transmitters employed solely for indoor operation.
    (1) Indoor UWB devices, by the nature of their design, must be 
capable of operation only indoors. The necessity to operate with a fixed 
indoor infrastructure, e.g., a transmitter that must be connected to the 
AC power lines, may be considered sufficient to demonstrate this.
    (2) The emissions from equipment operated under this section shall 
not be intentionally directed outside of the building in which the 
equipment is located, such as through a window or a doorway, to perform 
an outside function, such as the detection of persons about to enter a 
building.
    (3) The use of outdoor mounted antennas, e.g., antennas mounted on 
the outside of a building or on a telephone pole, or any other outdoors 
infrastructure is prohibited.
    (4) Field disturbance sensors installed inside of metal or 
underground storage tanks are considered to operate
[[Page 845]]
indoors provided the emissions are directed towards the ground.
    (5) A communications system shall transmit only when the intentional 
radiator is sending information to an associated receiver.
    (b) The UWB bandwidth of a UWB system operating under the provisions 
of this section must be contained between 3100 MHz and 10,600 MHz.
    (c) The radiated emissions at or below 960 MHz from a device 
operating under the provisions of this section shall not exceed the 
emission levels in Sec. 15.209. The radiated emissions above 960 MHz 
from a device operating under the provisions of this section shall not 
exceed the following average limits when measured using a resolution 
bandwidth of 1 MHz:
------------------------------------------------------------------------
                   Frequency in MHz                       EIRP in dBm
------------------------------------------------------------------------
960-1610.............................................              -75.3
1610-1990............................................              -53.3
1990-3100............................................              -51.3
3100-10600...........................................              -41.3
Above 10600..........................................              -51.3
------------------------------------------------------------------------
    (d) In addition to the radiated emission limits specified in the 
table in paragraph (c) of this section, UWB transmitters operating under 
the provisions of this section shall not exceed the following average 
limits when measured using a resolution bandwidth of no less than 1 kHz:
------------------------------------------------------------------------
                   Frequency in MHz                       EIRP in dBm
------------------------------------------------------------------------
1164-1240............................................              -85.3
1559-1610............................................              -85.3
------------------------------------------------------------------------
    (e) There is a limit on the peak level of the emissions contained 
within a 50 MHz bandwidth centered on the frequency at which the highest 
radiated emission occurs, fM. That limit is 0 dBm EIRP. It is 
acceptable to employ a different resolution bandwidth, and a 
correspondingly different peak emission limit, following the procedures 
described in Sec. 15.521.
    (f) UWB systems operating under the provisions of this section shall 
bear the following or similar statement in a conspicuous location on the 
device or in the instruction manual supplied with the device:
    ``This equipment may only be operated indoors. Operation outdoors is 
in violation of 47 U.S.C. 301 and could subject the operator to serious 
legal penalties.''
[67 FR 34856, May 16, 2002; 67 FR 39632, June 10, 2002]



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