[Federal Register Volume 67, Number 95 (Thursday, May 16, 2002)]
[Rules and Regulations]
[Pages 34852-34860]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 02-11929]



[[Page 34852]]

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FEDERAL COMMUNICATIONS COMMISSION

47 CFR Part 15

[ET Docket No. 98-153; FCC 02-48]


Ultra-Wideband Transmission Systems

AGENCY: Federal Communications Commission.

ACTION: Final rule.

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SUMMARY: This document revises the Commission's rules to permit the 
marketing and operation of certain types of new products incorporating 
ultra-wideband (UWB) technology. UWB devices operate by employing very 
narrow or short duration pulses that result in very large or wideband 
transmission bandwidths. UWB technology holds great promise for a vast 
array of new applications that we believe will provide significant 
benefits for public safety, businesses and consumers. With appropriate 
technical standards, UWB devices can operate using spectrum occupied by 
existing radio services without causing interference, thereby 
permitting scarce spectrum resources to be used more efficiently.

DATES: Effective July 15, 2002.

FOR FURTHER INFORMATION CONTACT: John A. Reed, Office of Engineering 
and Technology, (202) 418-2455.

SUPPLEMENTARY INFORMATION: This is a summary of the Commission's First 
Report and Order in ET Docket No. 98-153, adopted February 14, 2002, 
and released April 22, 2002. The complete text of this First Report and 
Order is available for inspection and copying during normal business 
hours in the FCC Reference Center (Room CY-A257), 445 12th Street, SW, 
Washington, DC, and also may be purchased from the Commission's copy 
contractor, Qualex International, (202) 863-2893, 445 12th Street, SW, 
Room CY-B402, Washington, DC 20554.

Summary of the First Report and Order

    1. In the First Report and Order (``Order''), the Commission amends 
part 15 of the rules to permit the marketing and operation of products 
incorporating ultra-wideband (UWB) technology. This Order includes 
standards designed to ensure that existing and planned radio services, 
particularly safety services, are adequately protected. We are 
proceeding cautiously in authorizing UWB technology, based in large 
measure on standards that the National Telecommunications and 
Information Administration (NTIA) found to be necessary to protect 
against interference to vital federal government operations. We are 
concerned, however, that the standards we are adopting may be 
overprotective and could unnecessarily constrain the development of UWB 
technology. Accordingly, within the next six to twelve months we intend 
to review the standards for UWB devices and issue a further rule making 
to explore more flexible technical standards and to address the 
operation of additional type of UWB operations and technology.
    2. This has been an unusually controversial proceeding involving a 
variety of UWB advocates and opponents. These parties have been unable 
to agree on the emission levels necessary to protect Government-
operated, safety-of-life and commercial radio systems from harmful 
interference. It is our belief that the standards contained in this 
Order are extremely conservative. These standards may change in the 
future as we continue to collect data regarding UWB operations. The 
analyses and technical standards contained in this Order are unique to 
this proceeding and will not be considered as a basis for determining 
or revising standards for other radio frequency devices, including 
other part 15 devices.
    3. To ensure that UWB devices do not cause harmful interference, 
this Order establishes different technical standards and operating 
restrictions for three types of UWB devices based on their potential to 
cause interference. These three types of UWB devices are: (1) Imaging 
systems including Ground Penetrating Radars (GPRs) and wall, through-
wall, surveillance, and medical imaging devices, (2) vehicular radar 
systems, and (3) communications and measurement systems. Generally, we 
are adopting unwanted emission limits for UWB devices that are 
significantly more stringent than those imposed on other part 15 
devices; limiting outdoor use of UWB devices to imaging systems, 
vehicular radar systems and portable devices; and, limiting the 
frequency band within which certain UWB products will be permitted to 
operate. The operation of UWB devices is not permitted onboard 
aircraft, ships or satellites nor may UWB devices be used for the 
operation of toys. The frequency band of operation is based on the -10 
dB bandwidth of the UWB emission. This combination of technical 
standards and operational restrictions will ensure that UWB devices 
coexist with the authorized radio services without the risk of harmful 
interference while we gain experience with this new technology. 
Specifically, the Order takes the following actions:
     Imaging Systems: Provides for the operation of GPRs and 
other imaging devices under part 15 of the Commission's rules subject 
to certain frequency and power limitations. All imaging systems are 
subject to coordination with NTIA through the FCC. Coordination of 
routine UWB operations shall not take longer than 15 business days from 
the receipt of the coordination request by NTIA. Operation in emergency 
situations involving the safety of life or property may occur without 
coordination provided a notification similar to that contained in 47 
CFR 2.405(a)-(e) is followed by the operator. The manufacturers of the 
UWB devices will be required to inform the users of the coordination 
requirements. The operators of imaging devices must be eligible for 
licensing under part 90 of our rules, except that medical imaging 
devices may be operated by a licensed health care practitioner. Imaging 
systems include:
     Ground Penetrating Radar Systems: GPRs must be operated 
below 960 MHz or in the frequency band 3.1-10.6 GHz. GPRs operate only 
when in contact with, or within one meter of, the ground for the 
purpose of detecting or obtaining the images of buried objects. The 
energy from the GPR is intentionally directed down into the ground for 
this purpose. Operation is restricted to law enforcement, fire and 
emergency rescue organizations, to scientific research institutions, to 
commercial mining companies, and to construction companies.
     Wall Imaging Systems: Wall imaging systems must be 
operated below 960 MHz or in the frequency band 3.1-10.6 GHz. Wall-
imaging systems are designed to detect the location of objects 
contained within a ``wall,'' such as a concrete structure, the side of 
a bridge, or the wall of a mine. Operation is restricted to law 
enforcement, fire and emergency rescue organizations, to scientific 
research institutions, to commercial mining companies, and to 
construction companies.
     Through-wall Imaging Systems: These systems must be 
operated below 960 MHz or in the frequency band 1.99-10.6 GHz. Through-
wall imaging systems detect the location or movement of persons or 
objects that are located on the other side of a structure such as a 
wall. Operation is limited to law enforcement, fire and emergency 
rescue organizations.
     Surveillance Systems: Although technically these devices 
are not imaging systems, for regulatory purposes they will be treated 
in the

[[Page 34853]]

same way as through-wall imaging systems used by police, fire and 
rescue organizations and will be permitted to operate in the frequency 
band 1.99-10.6 GHz. Surveillance systems operate as ``security fences'' 
by establishing a stationary RF perimeter field and detecting the 
intrusion of persons or objects in that field. Operation is limited to 
law enforcement, fire and emergency rescue organizations, to public 
utilities and to industrial entities.
     Medical Systems: These devices must be operated in the 
frequency band 3.1-10.6 GHz. A medical imaging system may be used for a 
variety of health applications to ``see'' inside the body of a person 
or animal. Operation must be at the direction of, or under the 
supervision of, a licensed health care practitioner.
     Vehicular Radar Systems: These are radar devices employing 
directional antennas and mounted on terrestrial transportation 
vehicles, and they must operate in the frequency band 22-29 GHz. The 
center frequency of the emission and the frequency at which the highest 
radiated emission occurs must be greater than 24.075 GHz. These devices 
are able to detect the location and movement of objects near a vehicle, 
enabling features such as near collision avoidance, improved airbag 
activation, and suspension systems that better respond to road 
conditions. Directional antennas or other methods must be used to 
attenuate the emissions above the horizontal plane in the 23.6-24.0 GHz 
band to protect passive space borne sensors.
     Communications and Measurement Systems: This category 
consists of a wide variety of other UWB devices, such as high-speed 
home and business networking devices as well as storage tank 
measurement devices under part 15 of the Commission's rules subject to 
certain frequency and power limitations. The devices must operate in 
the frequency band 3.1-10.6 GHz. The equipment must be designed to 
ensure that operation can only occur indoors or it must consist of hand 
held devices that may be employed for such activities as peer-to-peer 
operation. The term ``hand held'' refers to portable devices, such as a 
lap top computer or a PDA, that are primarily hand held while being 
operated and that do not employ a fixed infrastructure.
    4. The attached regulations contain the specifications for the 
various operating parameters and technical standards being applied to 
UWB devices. In general, we have adopted the emission limits requested 
by NTIA. These limits consist of quasi-peak limits below 960 MHz, RMS 
average limits above 960 MHz, peak emission limits, and limits on the 
amount of energy conducted onto the AC power line. Specific measurement 
procedures also have been established to demonstrate compliance with 
these limits. For example, there are provisions to permit UWB devices 
to be tested with the use of anechoic shielding in place of a ground 
plane provided a suitable adjustment is made to the measured results. 
There also are provisions for testing ground penetrating radars and 
wall imaging systems with the antennas pointed at a 20 inch thick bed 
of dry sand. In addition, provisions have been made to permit peak 
emission levels to be measured using a resolution bandwidth ranging 
from 1 MHz to 50 MHz with the peak limit adjusted to a peak EIRP limit, 
in dBm, of 20 log (RBW/50) where RBW is the resolution bandwidth of the 
measuring instrument in megahertz. The average limits are based on 
measurements employing a 1 MHz resolution bandwidth, an RMS detector, 
and a one millisecond or less averaging time. In addition, special 
narrowband limits are applied to emissions falling within the 1164-1240 
MHz and 1559-1610 MHz bands employed for the Global Positioning System.
    5. There were a few other provisions addressed or implemented in 
this Order:
     Existing Part 15 Operation. We specified that transmitters 
operating under the provisions of 47 CFR 15.217-15.255 must contain 
their 20 dB bandwidth within the specified band of operation. This 
includes the effects of frequency sweeping, frequency hopping and other 
modulation techniques that may be employed as well as the frequency 
stability of the transmitter over variations in temperature and supply 
voltage.
     Existing Waivers. We extended the waivers issued to U.S. 
Radar, Time Domain, Zircon, and Kohler. Originally, these waivers were 
scheduled to expire upon effective date of this Order. Kohler requested 
a one year extension citing the time necessary to redesign its product, 
to test the redesigned product, and to modify its tooling. We 
sympathize with these concerns and believe that these problems also 
would affect other companies operating under a waiver. Accordingly, we 
extended all of the waivers until one year from the effective date of 
this Order.
     U.S. Government Operation of UWB Devices. When the part 15 
regulations were amended in 1989, the Commission opened several 
frequency bands for unlicensed operation even though those bands were 
allocated for exclusive operation by the U.S. Government. The 
Commission took this action following an informal agreement with NTIA 
that similarly permitted it to operate equipment in exclusive non-
government bands under the same part 15 standards. We will continue 
this policy, permitting the U.S. Government to operate in non-
government frequency bands and in shared frequency bands under the part 
15 standards. Accordingly, as a condition of their use of these bands 
U.S. Government specifications for UWB devices operated by the U.S. 
Government agencies in non-government or in shared frequency bands must 
conform to the standards and operating conditions that are being 
adopted in this Order. The operation in non-government band of UWB 
devices that are not in compliance with the technical and 
administrative provisions contained in this Order is not permitted 
without the concurrence of the FCC. We believe that this will result in 
a greater number of UWB devices operating under the same parameters, 
facilitating our studies to readdress the appropriateness of the UWB 
standards within the next six to twelve months.
     Exemption of Unlicensed PCS Transmitters from the 
Restricted Bands. Under the current rules, unlicensed PCS transmitters 
operating in the 1910-1930 MHz and the 2390-2400 MHz bands under 
Subpart D of part 15 are not subject to the restricted band provisions 
in 47 CFR 15.205.
    However, this provision is not readily apparent due to the lack of 
a reference to Subpart C of part 15 in the cross-reference statement 
contained in 47 CFR 15.309. We are taking the opportunity provided by 
this Report and Order to clarify this current provision through an 
amendment to 47 CFR 15.205. As this amendment to the rules only 
clarifies an existing regulation, prior notice and comment are 
unnecessary.

Measurement Procedures

    6. The Commission adopted the following general guidance for 
compliance measurements of UWB devices. The procedures herein are based 
on the Commissions current understanding of UWB technology. 
Modifications may be necessary as measurement experience is gained. 
Except as otherwise described herein, measurements shall be made in 
accordance with the procedures specified in Sec. 15.31(a)(6).
    (1) Ground penetrating radars (GPRs) and wall imaging systems shall 
be tested under conditions that are representative of actual operating 
conditions. UWB devices intended for these types of application shall 
be compliance tested with the transducer at an operationally

[[Page 34854]]

representative height above a twenty-inch thick bed of dry sand. The 
use of this medium, particularly for larger GPRs (e.g., those that are 
towed behind vehicles), will likely preclude the use of a turntable in 
the measurement procedure. For these cases, directionality gradients 
shall be analyzed and measurements shall be performed at a sufficient 
number of radials around the equipment under test to determine the 
radial at which the field strength values of the radiated emissions are 
maximized.
    (2) Field strength measurements of through-wall imaging systems may 
be made with a \1/2\" thick gypsum or drywall board placed between the 
UWB device antenna and the measurement system antenna.
    (3) RMS average field strength measurements, required for all 
frequencies above 960 MHz, shall be made using techniques to obtain 
true RMS average. This can be accomplished by using a spectrum analyzer 
that incorporates a RMS detector. The resolution bandwidth of the 
analyzer shall be set to 1 MHz, the RMS detector selected, and a video 
integration time of 1 ms or less is to be used. If the transmitter 
employs pulse gating, in which the transmitter is quiescent for 
intervals that are long compared to the nominal pulse repetition 
interval, all measurements shall be made while the pulse train is gated 
on. Alternatively, a true RMS level can be measured using a spectrum 
analyzer that does not incorporate a RMS detector. This approach 
requires a multiple step technique beginning with a peak detection scan 
of the UWB spectrum with a RBW of 1 MHz and a VBW of no less than 1 
MHz. The resulting trace is to be used to identify the frequency and 
bandwidth of the five highest peaks in the spectrum. The analyzer is 
then to be placed in a ``zero span'' mode, with a RBW of 1 MHz, a video 
bandwidth equal to or greater than 1 MHz, and a detector selected that 
does not distort or smooth the instantaneous signal levels (e.g., a 
``sample'' detector). With these settings, a minimum of ten independent 
instantaneous points, representing the highest amplitude readings, are 
to be obtained during the time that a pulse is present, in each 1 MHz 
frequency bin across the bandwidth of each of the five highest peaks 
identified in the previous step. Note that when the PRF of the device 
under test is less than the measurement bandwidth of 1 MHz, a 
significant number of samples may be required to ensure that a minimum 
of 10 samples with the pulse present are obtained. The data obtained 
from these measurements must then be post-processed to determine true 
RMS average power levels. The post-processing of the data can be 
performed manually or with the aid of appropriate software.
    (4) On any frequency or frequencies below or equal to 960 MHz, the 
field strength shall be measured with equipment employing a CISPR 
quasi-peak detector function and related measurement bandwidths, unless 
otherwise specified.
    (5) In the frequency bands 1164-1240 MHz and 1559-1610 MHz, average 
radiated field strength measurements shall be made with a resolution 
bandwidth of no less than 1 kHz, using techniques as described 
previously for determining true RMS average power levels.
    (6) Peak radiated emission measurements shall be made using a 
spectrum analyzer with a 3 MHz resolution bandwidth and no less than a 
3 MHz video bandwidth. The analyzer should be used in a maximum-hold 
trace mode. The peak power level expressed in a 3 MHz bandwidth and the 
frequency at which this level was measured shall be reported in the 
application for certification. A different resolution bandwidth between 
1 MHz and 50 MHz may be employed with appropriate changes to the 
standard. If a resolution bandwidth greater than 3 MHz is employed, a 
detailed description of the test procedure, calibration of the test 
setup, and the instrumentation employed in the testing must be 
submitted to the Commission. It is recommended that measurements using 
a resolution bandwidth greater than 3 MHz be coordinated with the 
Commission's laboratory staff in advance of the submission for 
certification.
    (7) Field strength measurements may be performed without the use of 
a ground plane; however, a factor of 4.7 dB must be added to the 
measurement results thus obtained.
    (8) To the extent practicable, the device under test should be 
measured at the distance specified in the appropriate rule section. 
However, in order to obtain an adequate signal-to-noise ratio in the 
measurement system, radiated measurements may have to be made at 
distances less than specified. In these cases, measurements may be 
performed at a distance other than what is specified, provided: 
measurements are not made in the near field of the measurement or 
device under test antenna, except where it can be shown that near field 
measurements are appropriate due to the characteristics of the device; 
and, it can be demonstrated that the signal levels necessitated a 
measurement at the distance employed in order to be accurately detected 
by the measurement equipment.
    (9) To the maximum extent possible, field strength measurements 
should be performed with the equipment under test positioned as it is 
intended to be used in actual operating conditions.
    (10) Radiated field strength measurements must be made using the 
antenna to be employed with the UWB device under test. The measurement 
antenna must be sufficiently broad band to cover the frequency range of 
the measurements, and the use of multiple measurement antennas may be 
required. All measurement antennas used must be accurately calibrated 
and must demonstrate low phase dispersion over the frequency range of 
measurement. The orientation of the measurement antenna shall be varied 
to determine the polarization that maximizes the measured field 
strength.
    (11) The spectrum to be investigated should include at least the 
fundamental emission and the secondary lobe regardless of the center 
frequency. In order to accomplish this, the frequency spectrum shall be 
investigated from the lowest frequency generated within the device, 
without going below 9 kHz, up to the frequency range shown in 
Sec. 15.33(a) of the FCC rules or up to an upper frequency defined by 
adding three divided by the pulse width in seconds to the center 
frequency in Hz, whichever is greater. The frequency range in 
Sec. 15.33(a) is based on the center frequency unless a higher 
frequency, e.g., a carrier frequency, is generated within the device. 
There is no requirement to measure emissions beyond 40 GHz provided the 
center frequency is less than 10 GHz; beyond 100 GHz if the center 
frequency is at or above 10 GHz and below 30 GHz; or beyond 200 GHz if 
the center frequency is at or above 30 GHz.

Final Regulatory Flexibility Certification

    7. The Regulatory Flexibility Act of 1980, as amended (RFA)\1\ 
requires that a regulatory flexibility analysis be prepared for 
rulemaking proceedings, unless the agency certifies that ``the rule 
will not have a significant economic impact on a substantial number of 
small entities.'' \2\ The RFA generally defines ``small entity'' as 
having the same meaning as the terms ``small business,''

[[Page 34855]]

``small organization,'' and ``small governmental jurisdiction.'' \3\ In 
addition, the term ``small business'' has the same meaning as the term 
``small business concern'' under the Small Business Act.\4\ A small 
business concern is one which: (1) Is independently owned and operated; 
(2) is not dominant in its field of operation; and (3) satisfies any 
additional criteria established by the Small Business Administration 
(SBA).\5\
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    \1\ The RFA, see 5 U.S.C. S 601 et. seq., has been amended by 
the Contract With America Advancement Act of 1996, Public Law 104-
121, 110 Stat. 847 (1996) (CWAAA). Title II of the CWAAA is the 
Small Business Regulatory Enforcement Fairness Act of 1996 (SBREFA).
    \2\ 5 U.S.C. 605(b).
    \3\ 5 U.S.C. 601(6).
    \4\ 5 U.S.C. 601(3) (incorporating by reference the definition 
of ``small business concern'' in Small Business Act, 15 U.S.C. S 
632). Pursuant to 5 U.S.C. 601(3), the statutory definition of a 
small business applies ``unless an agency, after consultation with 
the Office of Advocacy of the Small Business Administration and 
after opportunity for public comment, establishes one or more 
definitions of such term which are appropriate to the activities of 
the agency and publishes such definition(s) in the Federal 
Register.''
    \5\ Small Business Act, 15 U.S.C. S 632.
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    8. In this First Report and Order, we are amending part 15 of our 
rules to permit the marketing and operation of new products 
incorporating ultra-wideband (``UWB'') technology. UWB devices operate 
by employing very narrow or short duration pulses that result in very 
large or wideband transmission bandwidths. UWB devices have the 
capability to provide for significant benefits for public safety, 
businesses and consumers. With appropriate technical standards, UWB 
devices can operate on spectrum occupied by existing radio services 
without causing interference, thereby permitting scarce spectrum 
resources to be used more efficiently.
    9. We note that the Aircraft Owners and Pilots Association (AOPA) 
along with the National Business Aviation Association (NBAA) commented 
that the impact on small entities could not be estimated at this time. 
They added that their constituency substantially consists of small 
entities, comprising individuals and small businesses that are aircraft 
owners and operators. AOPA and NBAA expressed concern that there would 
be a severe and lengthy impact to aeronautical operations should the 
UWB standards prove to be inadequate to protect aeronautical 
communications, navigation and surveillance functions. However, as 
demonstrated in our analyses of the interference studies on GPS there 
should be no impact to aeronautical radio operations from UWB devices 
operating under the technical limits and operational requirements we 
are adopting. Therefore, we find that our action will have no negative 
impact on this industry and in fact will have a positive impact. 
Further, as noted in the text we currently are limiting the expansion 
of UWB, out of an abundance of caution, until such time as we gain 
additional experience. Thus, we expect that our actions do not amount 
to a significant economic impact at this time. Accordingly, we certify 
that the rules being adopted in this First Report and Order will not 
have a significant economic impact on a substantial number of small 
entities.
    10. We will send a copy of the First Report and Order, including a 
copy of this final certification, in a report to Congress pursuant to 
the Congressional Review Act.\6\ In addition, the First Report and 
Order and this certification will be sent to the Chief Counsel for 
Advocacy of the Small Business Administration.\7\
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    \6\ See 5 U.S.C. 801(a)(1)(A).
    \7\ See 5 U.S.C. 605(b).
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Ordering Clauses

    11. Authority for issuance of this First Report and Order is taken 
pursuant to Sections 4(i), 302, 303(e), 303(f), 303(r), 304 and 307 of 
the Communications Act of 1934, as amended, 47 U.S.C. Sections 154(i), 
302, 303(e), 303(f), 303(r), 304 and 307. Part 15 of the Commission's 
rules are amended and is effective July 15, 2002.
    12. The waivers issued on June 25, 1999, to Time Domain 
Corporation, to U.S. Radar Inc., and to Zircon Corp. and the waiver 
issued on August 6, 2001, to Kohler Co. to permit the manufacture and 
marketing of their UWB devices remain in effect until one year from 
July 15, 2002.
    13. The Commission's Consumer and Governmental Affairs Bureau, 
Reference Information Center, Shall Send a copy of this Report and 
Order, including the Final Regulatory Flexibility Certification, to the 
Chief Counsel for Advocacy of the Small Business Administration.

List of Subjects in 47 CFR Part 15

    Communications equipment, Radio, Reporting and recordkeeping 
requirements, Security measures.

Federal Communications Commission.
Marlene H. Dortch,
Secretary.

Rule Changes

    For the reasons discussed in the preamble, the Federal 
Communications Commission amends part 15 of 47 CFR as follows:

PART 15--RADIO FREQUENCY DEVICES

    1. The authority citation for part 15 continues to read as follows:

    Authority: 47 U.S.C. 154, 302, 303, 304, 307, 336, and 544A.


    2. Section 15.35 is amended by revising paragraph (b) to read as 
follows:


Sec. 15.35  Measurement detector functions and bandwidths.

* * * * *
    (b) Unless otherwise stated, on any frequency or frequencies above 
1000 MHz the radiated limits shown are based upon the use of 
measurement instrumentation employing an average detector function. 
When average radiated emission measurements are specified in this part, 
including emission measurements below 1000 MHz, there also is a limit 
on the radio frequency emissions, as measured using instrumentation 
with a peak detector function, corresponding to 20 dB above the maximum 
permitted average limit for the frequency being investigated unless a 
different peak emission limit is otherwise specified in the rules, 
e.g., see Secs. 15.255, 15.509 and 15.511. Unless otherwise specified, 
measurements above 1000 MHz shall be performed using a minimum 
resolution bandwidth of 1 MHz. Measurements of AC power line conducted 
emissions are performed using a CISPR quasi-peak detector, even for 
devices for which average radiated emission measurements are specified.
* * * * *

    3. Section 15.205 is amended by adding paragraph (d)(6) to read as 
follows:


Sec. 15.205  Restricted bands of operation.

* * * * *
    (d) * * *
    (6) Transmitters operating under the provisions of subparts D or F 
of this part.
* * * * *

    4. Section 15.215 is amended by revising paragraph (c) and by 
removing paragraph (d) to read as follows:


Sec. 15.215  Additional provisions to the general radiated emission 
limitations.

* * * * *
    (c) Intentional radiators operating under the alternative 
provisions to the general emission limits, as contained in Secs. 15.217 
through 15.255 and in subpart E of this part, must be designed to 
ensure that the 20 dB bandwidth of the emission is contained within the 
frequency band designated in the rule section under which the equipment 
is operated. The requirement to contain the 20 dB bandwidth of the 
emission within the specified frequency band includes the effects from 
frequency sweeping, frequency hopping and other modulation techniques 
that may be

[[Page 34856]]

employed as well as the frequency stability of the transmitter over 
expected variations in temperature and supply voltage. If a frequency 
stability is not specified in the regulations, it is recommended that 
the fundamental emission be kept within at least the central 80% of the 
permitted band in order to minimize the possibility of out-of-band 
operation.

    5. Part 15 is amended by adding a new subpart F to read as follows:
Subpart F--Ultra-Wideband Operation
Sec.
15.501  Scope.
15.503  Definitions.
15.505  Cross reference.
15.507  Marketing of UWB equipment.
15.509  Technical requirements for low frequency imaging systems.
15.511  Technical requirements for mid-frequency imaging systems.
15.513  Technical requirements for high frequency imaging systems.
15.515  Technical requirements for vehicular radar systems.
15.517  Technical requirements for indoor UWB systems.
15.519  Technical requirements for hand held UWB systems.
15.521  Technical requirements applicable to all UWB devices.
15.523  Measurement procedures.
15.525  Coordination requirements.


Sec. 15.501  Scope.

    This subpart sets out the regulations for unlicensed ultra-wideband 
transmission systems.


Sec. 15.503  Definitions.

    (a) UWB bandwidth. For the purpose of this subpart, the UWB 
bandwidth is the frequency band bounded by the points that are 10 dB 
below the highest radiated emission, as based on the complete 
transmission system including the antenna. The upper boundary is 
designated fH and the lower boundary is designated 
fL. The frequency at which the highest radiated emission 
occurs is designated fM.
    (b) Center frequency. The center frequency, fC, equals 
(fH + fL)/2.
    (c) Fractional bandwidth. The fractional bandwidth equals 
2(fH-fL)/ (fH + fL).
    (d) Ultra-wideband (UWB) transmitter. An intentional radiator that, 
at any point in time, has a fractional bandwidth equal to or greater 
than 0.20 or has a UWB bandwidth equal to or greater than 500 MHz, 
regardless of the fractional bandwidth.
    (e) Imaging system. A general category consisting of ground 
penetrating radar systems, medical imaging systems, wall imaging 
systems through-wall imaging systems and surveillance systems. As used 
in this subpart, imaging systems do not include systems designed to 
detect the location of tags or systems used to transfer voice or data 
information.
    (f) Ground penetrating radar (GPR) system. A field disturbance 
sensor that is designed to operate only when in contact with, or within 
one meter of, the ground for the purpose of detecting or obtaining the 
images of buried objects or determining the physical properties within 
the ground. The energy from the GPR is intentionally directed down into 
the ground for this purpose.
    (g) Medical imaging system. A field disturbance sensor that is 
designed to detect the location or movement of objects within the body 
of a person or animal.
    (h) Wall imaging system. A field disturbance sensor that is 
designed to detect the location of objects contained within a ``wall'' 
or to determine the physical properties within the ``wall.'' The 
``wall'' is a concrete structure, the side of a bridge, the wall of a 
mine or another physical structure that is dense enough and thick 
enough to absorb the majority of the signal transmitted by the imaging 
system. This category of equipment does not include products such as 
``stud locators'' that are designed to locate objects behind gypsum, 
plaster or similar walls that are not capable of absorbing the 
transmitted signal.
    (i) Through-wall imaging system. A field disturbance sensor that is 
designed to detect the location or movement of persons or objects that 
are located on the other side of an opaque structure such as a wall or 
a ceiling. This category of equipment may include products such as 
``stud locators'' that are designed to locate objects behind gypsum, 
plaster or similar walls that are not thick enough or dense enough to 
absorb the transmitted signal.
    (j) Surveillance system. A field disturbance sensor used to 
establish a stationary RF perimeter field that is used for security 
purposes to detect the intrusion of persons or objects.
    (k) EIRP. Equivalent isotropically radiated power, i.e., the 
product of the power supplied to the antenna and the antenna gain in a 
given direction relative to an isotropic antenna. The EIRP, in terms of 
dBm, can be converted to a field strength, in dBuV/m at 3 meters, by 
adding 95.2. As used in this subpart, EIRP refers to the highest signal 
strength measured in any direction and at any frequency from the UWB 
device, as tested in accordance with the procedures specified in 
Sec. 15.31(a) and 15.523 of this chapter.
    (l) Law enforcement, fire and emergency rescue organizations. As 
used in this subpart, this refers to those parties eligible to obtain a 
license from the FCC under the eligibility requirements specified in 
Sec. 90.20(a)(1) of this chapter.
    (m) Hand held. As used in this subpart, a hand held device is a 
portable device, such as a lap top computer or a PDA, that is primarily 
hand held while being operated and that does not employ a fixed 
infrastructure.


Sec. 15.505  Cross reference.

    (a) Except where specifically stated otherwise within this subpart, 
the provisions of subparts A and B and of Secs. 15.201 through 15.204 
and 15.207 of subpart C of this part apply to unlicensed UWB 
intentional radiators. The provisions of Sec. 15.35(c) and 15.205 do 
not apply to devices operated under this subpart. The provisions of 
Footnote US 246 to the Table of Frequency Allocations contained in 
Sec. 2.106 of this chapter does not apply to devices operated under 
this subpart.
    (b) The requirements of this subpart apply only to the radio 
transmitter, i.e., the intentional radiator, contained in the UWB 
device. Other aspects of the operation of a UWB device may be subject 
to requirements contained elsewhere in this chapter. In particular, a 
UWB device that contains digital circuitry not directly associated with 
the operation of the transmitter also is subject to the requirements 
for unintentional radiators in subpart B of this part. Similarly, an 
associated receiver that operates (tunes) within the frequency range 30 
MHz to 960 MHz is subject to the requirements in subpart B of this 
part.


Sec. 15.507  Marketing of UWB equipment.

    In some cases, the operation of UWB devices is limited to specific 
parties, e.g., law enforcement, fire and rescue organizations operating 
under the auspices of a state or local government. The marketing of UWB 
devices must be directed solely to parties eligible to operate the 
equipment. The responsible party, as defined in Sec. 2.909 of this 
chapter, is responsible for ensuring that the equipment is marketed 
only to eligible parties. Marketing of the equipment in any other 
manner may be considered grounds for revocation of the grant of 
certification issued for the equipment.


Sec. 15.509  Technical requirements for low frequency imaging systems.

    (a) The UWB bandwidth of an imaging system operating under the 
provisions of this section must be below 960 MHz.
    (b) Operation under the provisions of this section is limited to 
the following:

[[Page 34857]]

    (1) GPRs and wall imaging systems operated by law enforcement, fire 
and emergency rescue organizations, by scientific research institutes, 
by commercial mining companies, or by construction companies.
    (2) Through-wall imaging systems operated by law enforcement, fire 
or emergency rescue organizations.
    (3) Parties operating this equipment must be eligible for licensing 
under the provisions of part 90 of this chapter.
    (4) The operation of imaging systems under this section requires 
coordination, as detailed in Sec. 15.525.
    (c) An 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 addition, 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
Above 1990...........................................              -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) 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.
    (g) Imaging systems operating under the provisions of this section 
shall bear the following or similar statement, as adjusted for the 
specific provisions in paragraph (b) of this section, in a conspicuous 
location on the device:

    ``Operation of this device is restricted to law enforcement, 
fire and rescue officials, scientific research institutes, 
commercial mining companies, and construction companies. Operation 
by any other party is a violation of 47 U.S.C. 301 and could subject 
the operator to serious legal penalties.''


Sec. 15.511  Technical requirements for mid-frequency imaging systems.

    (a) The UWB bandwidth of an imaging system operating under the 
provisions of this section must be contained between 1990 MHz and 
10,600 MHz.
    (b) Operation under the provisions of this section is limited to 
the following:
    (1) Through-wall imaging systems operated by law enforcement, fire 
or emergency rescue organizations.
    (2) Fixed surveillance systems operated by law enforcement, fire or 
emergency rescue organizations or by manufacturers licensees, petroleum 
licensees or power licensees as defined in Sec. 90.7 of this chapter.
    (3) Parties operating under the provisions of this section must be 
eligible for licensing under the provisions of part 90 of this chapter.
    (4) The operation of imaging systems under this section requires 
coordination, as detailed in Sec. 15.525.
    (c) A through-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 addition, 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.............................................              -53.3
1610-1990............................................              -51.3
1990-10600...........................................              -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............................................              -63.3
1559-1610............................................              -63.3
------------------------------------------------------------------------

    (f) 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.
    (g) Imaging systems operating under the provisions of this section 
shall bear the following or similar statement, as adjusted for the 
specific provisions in paragraph (b) of this section, in a conspicuous 
location on the device:

    ``Operation of this device is restricted to law enforcement, 
fire and rescue officials, public utilities, and industrial 
entities. Operation by any other party is a violation of 47 U.S.C. 
301 and could subject the operator to serious legal penalties.''


Sec. 15.513  Technical requirements for high frequency imaging systems.

    (a) The UWB bandwidth of an imaging system operating under the 
provisions of this section must be contained between 3100 MHz and 
10,600 MHz.
    (b) Operation under the provisions of this section is limited to 
the following:
    (1) GPRs and wall imaging systems operated by law enforcement, fire 
or emergency rescue organizations, by scientific research institutes, 
by commercial mining companies, or by construction companies.
    (2) Medical imaging systems used at the direction of, or under the 
supervision of, a licensed health care practitioner.
    (3) Parties operating GPRs or wall imaging systems must be eligible 
for licensing under the provisions of part 90 of this chapter.
    (4) The operation of imaging systems under this section requires 
coordination, as detailed in Sec. 15.525.
    (c) An 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 addition, 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

[[Page 34858]]

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) 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.
    (g) Imaging systems, other than medical imaging systems, operating 
under the provisions of this section shall bear the following or 
similar statement in a conspicuous location on the device:

    ``Operation of this device is restricted to law enforcement, 
fire and rescue officials, scientific research institutes, 
commercial mining companies, and construction companies. Operation 
by any other party is a violation of 47 U.S.C. 301 and could subject 
the operator to serious legal penalties.''


Sec. 15.515  Technical requirements for vehicular radar systems.

    (a) Operation under the provisions of this section is limited to 
UWB field disturbance sensors mounted in terrestrial transportation 
vehicles. These devices shall operate only when the vehicle is 
operating, e.g., the engine is running. Operation shall occur only upon 
specific activation, such as upon starting the vehicle, changing gears, 
or engaging a turn signal.
    (b) The UWB bandwidth of a vehicular radar system operating under 
the provisions of this section shall be contained between 22 GHz and 29 
GHz. In addition, the center frequency, fC, and the 
frequency at which the highest level emission occurs, fM, 
must be greater than 24.075 GHz.
    (c) Following proper installation, vehicular radar systems shall 
attenuate any emissions within the 23.6-24.0 GHz band that appear 38 
degrees or greater above the horizontal plane by 25 dB below the limit 
specified in paragraph (d) of this section. For equipment authorized, 
manufactured or imported on or after January 1, 2005, this level of 
attenuation shall be 25 dB for any emissions within the 23.6-24.0 GHz 
band that appear 30 degrees or greater above the horizontal plane. For 
equipment authorized, manufactured or imported on or after January 1, 
2010, this level of attenuation shall be 30 dB for any emissions within 
the 23.6-24.0 GHz band that appear 30 degrees or greater above the 
horizontal plane. For equipment authorized, manufactured or imported on 
or after January 1, 2014, this level of attenuation shall be 35 dB for 
any emissions within the 23.6-24.0 GHz band that appear 30 degrees or 
greater above the horizontal plane. This level of attenuation can be 
achieved through the antenna directivity, through a reduction in output 
power or any other means.
    (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.............................................              -75.3
1610-22,000..........................................              -61.3
22,000-29,000........................................              -41.3
29,000-31,000........................................              -51.3
Above 31,000.........................................              -61.3
------------------------------------------------------------------------

    (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............................................              -85.3
1559-1610............................................              -85.3
------------------------------------------------------------------------

    (f) 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.


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 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
------------------------------------------------------------------------

    (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

[[Page 34859]]

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
------------------------------------------------------------------------

    (f) 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.
    (g) 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.''


Sec. 15.519  Technical requirements for hand held UWB systems.

    (a) UWB devices operating under the provisions of this section must 
be hand held, i.e., they are relatively small devices that are 
primarily hand held while being operated and do not employ a fixed 
infrastructure.
    (1) A UWB device operating under the provisions of this section 
shall transmit only when it is sending information to an associated 
receiver. The UWB intentional radiator shall cease transmission within 
10 seconds unless it receives an acknowledgement from the associated 
receiver that its transmission is being received. An acknowledgment of 
reception must continue to be received by the UWB intentional radiator 
at least every 10 seconds or the UWB device must cease transmitting.
    (2) The use of antennas mounted on outdoor structures, e.g., 
antennas mounted on the outside of a building or on a telephone pole, 
or any fixed outdoors infrastructure is prohibited. Antennas may be 
mounted only on the hand held UWB device.
    (3) UWB devices operating under the provisions of this section may 
operate indoors or outdoors.
    (b) The UWB bandwidth of a device 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
1610-1900............................................              -63.3
1900-3100............................................              -61.3
3100-10600...........................................              -41.3
Above 10600..........................................              -61.3
------------------------------------------------------------------------

    (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.


Sec. 15.521  Technical requirements applicable to all UWB devices.

    (a) UWB devices may not be employed for the operation of toys. 
Operation onboard an aircraft, a ship or a satellite is prohibited.
    (b) Manufacturers and users are reminded of the provisions of 
Secs. 15.203 and 15.204.
    (c) As noted in Sec. 15.3(k) digital circuitry that is used only to 
enable the operation of a transmitter and that does not control 
additional functions or capabilities is not classified as a digital 
device. Instead, the emissions from that digital circuitry are subject 
to the same limits as those applicable to the transmitter. If it can be 
clearly demonstrated that an emission from a UWB transmitter is due 
solely to emissions from digital circuitry contained within the 
transmitter and that the emission is not intended to be radiated from 
the transmitter's antenna, the limits shown in Sec. 15.209 shall apply 
to that emission rather than the limits specified in this section.
    (d) Within the tables in Sec. Sec. 15.509, 15.511, 15.513, 15.515, 
15.517, and 15.519, the tighter emission limit applies at the band 
edges. Radiated emission levels at and below 960 MHz are based on 
measurements employing a CISPR quasi-peak detector. Radiated emission 
levels above 960 MHz are based on RMS average measurements over a 1 MHz 
resolution bandwidth. The RMS average measurement is based on the use 
of a spectrum analyzer with a resolution bandwidth of 1 MHz, an RMS 
detector, and a 1 millisecond or less averaging time. If pulse gating 
is employed where the transmitter is quiescent for intervals that are 
long compared to the nominal pulse repetition interval, measurements 
shall be made with the pulse train gated on. Alternative measurement 
procedures may be considered by the Commission.
    (e) The frequency at which the highest radiated emission occurs, 
fM, must be contained within the UWB bandwidth.
    (f) Imaging systems may be employed only for the type of 
information exchange described in their specific definitions contained 
in Sec. 15.503. The detection of tags or the transfer or data or voice 
information is not permitted under the standards for imaging systems.
    (g) When a peak measurement is required, it is acceptable to use a 
resolution bandwidth other than the 50 MHz specified in this subpart. 
This resolution bandwidth shall not be lower than 1 MHz or greater than 
50 MHz, and the measurement shall be centered on the frequency at which 
the highest radiated emission occurs, fM. If a resolution 
bandwidth other than 50 MHz is employed, the peak EIRP limit shall be 
20 log (RBW/50) dBm where RBW is the resolution bandwidth in megahertz 
that is employed. This may be converted to a peak field strength level 
at 3 meters using E(dBuV/m) = P(dBm EIRP) + 95.2. If RBW is greater 
than 3 MHz, the application for certification filed with the Commission 
must contain a detailed description of the test procedure, calibration 
of the test setup, and the instrumentation employed in the testing.
    (h) The highest frequency employed in Sec. 15.33 to determine the 
frequency range over which radiated measurements are made shall be 
based on the center frequency, fC, unless a higher frequency 
is generated within the UWB device. For measuring emission levels, the 
spectrum shall be investigated from the lowest frequency generated in 
the UWB transmitter, without going below 9 kHz, up to the frequency 
range shown in Sec. 15.33(a) or up to fC + 3/(pulse width in 
seconds), whichever is higher. There is no requirement to measure 
emissions

[[Page 34860]]

beyond 40 GHz provided fC is less than 10 GHz; beyond 100 
GHz if fC is at or above 10 GHz and below 30 GHz; or beyond 
200 GHz if fC is at or above 30 GHz.
    (i) The prohibition in Sec. 2.201(f) and 15.5(d) of this chapter 
against Class B (damped wave) emissions does not apply to UWB devices 
operating under this subpart.
    (j) Responsible parties are reminded of the other standards and 
requirements cross referenced in Sec. 15.505, such as a limit on 
emissions conducted onto the AC power lines.


Sec. 15.523  Measurement procedures.

    Measurements shall be made in accordance with the procedures 
specified by the Commission.


Sec. 15.525  Coordination requirements.

    (a) UWB imaging systems require coordination through the FCC before 
the equipment may be used. The operator shall comply with any 
constraints on equipment usage resulting from this coordination.
    (b) The users of UWB imaging devices shall supply detailed 
operational areas to the FCC Office of Engineering and Technology who 
shall coordinate this information with the Federal Government through 
the National Telecommunications and Information Administration. The 
information provided by the UWB operator shall include the name, 
address and other pertinent contact information of the user, the 
desired geographical area of operation, and the FCC ID number and other 
nomenclature of the UWB device. This material shall be submitted to the 
following address: Frequency Coordination Branch, Office of Engineering 
and Technology, Federal Communications Commission, 445 12th Street, SW, 
Washington, DC 20554, ATTN: UWB Coordination.
    (c) The manufacturers, or their authorized sales agents, must 
inform purchasers and users of their systems of the requirement to 
undertake detailed coordination of operational areas with the FCC prior 
to the equipment being operated.
    (d) Users of authorized, coordinated UWB systems may transfer them 
to other qualified users and to different locations upon coordination 
of change of ownership or location to the FCC and coordination with 
existing authorized operations.
    (e) The NTIA/FCC coordination report shall include any needed 
constraints that apply to day-to-day operations. Such constraints could 
specify prohibited areas of operations or areas located near authorized 
radio stations for which additional coordination is required before 
operation of the UWB equipment. If additional local coordination is 
required, a local coordination contact will be provided.
    (f) The coordination of routine UWB operations shall not take 
longer than 15 business days from the receipt of the coordination 
request by NTIA. Special temporary operations may be handled with an 
expedited turn-around time when circumstances warrant. The operation of 
UWB systems in emergency situations involving the safety of life or 
property may occur without coordination provided a notification 
procedure, similar to that contained in Sec. 2.405(a) through (e) of 
this chapter, is followed by the UWB equipment user.

[FR Doc. 02-11929 Filed 5-15-02; 8:45 am]
BILLING CODE 6712-01-P