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FCC Part 15 Radio Frequency Devices
Section 15.509

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: 47CFR15.509]
[Page 841]
 
                       TITLE 47--TELECOMMUNICATION
 
              CHAPTER I--FEDERAL COMMUNICATIONS COMMISSION
 
PART 15_RADIO FREQUENCY DEVICES--Table of Contents
 
                   Subpart F_Ultra-Wideband Operation
 
Sec. 15.509  Technical requirements for ground penetrating radars 
and wall imaging systems.
    (a) The UWB bandwidth of an imaging system operating under the 
provisions of this section must be below 10.6 GHz.
    (b) Operation under the provisions of this section is limited to 
GPRs and wall imaging systems operated for purposes associated with law 
enforcement, fire fighting, emergency rescue, scientific research, 
commercial mining, or construction.
    (1) Parties operating this equipment must be eligible for licensing 
under the provisions of part 90 of this chapter.
    (2) The operation of imaging systems under this section requires 
coordination, as detailed in Sec. 15.525.
    (c) A GPR that is designed to be operated while being hand held and 
a wall imaging system shall contain a manually operated switch that 
causes the transmitter to cease operation within 10 seconds of being 
released by the operator. In lieu of a switch located on the imaging 
system, it is permissible to operate an imaging system by remote control 
provided the imaging system ceases transmission within 10 seconds of the 
remote switch being released by the operator.
    (d) 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..................................................         -65.3
1610-1990.................................................         -53.3
1990-3100.................................................         -51.3
3100-10600................................................         -41.3
Above 10600...............................................         -51.3
------------------------------------------------------------------------
    (e) In addition to the radiated emission limits specified in the 
table in paragraph (d) 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.................................................         -75.3
1559-1610.................................................         -75.3
------------------------------------------------------------------------
    (f) For UWB devices where the frequency at which the highest 
radiated emission occurs, fM, is above 960 MHz, there is a 
limit on the peak level of the emissions contained within a 50 MHz 
bandwidth centered on 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.
[68 FR 19749, Apr. 22, 2003]



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