[Federal Register: April 22, 2003 (Volume 68, Number 77)]
[Proposed Rules]
[Page 19773-19777]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr22ap03-24]
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FEDERAL COMMUNICATIONS COMMISSION
47 CFR Part 15
[ET Docket No. 98-153; FCC 03-33]
Ultra-Wideband Transmission Systems
AGENCY: Federal Communications Commission.
ACTION: Proposed rule.
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SUMMARY: Fourteen petitions for reconsideration were filed in response
to the regulations for unlicensed ultra-wideband (``UWB'') operation.
Some of the petitions addressed matters that were outside of the scope
of this proceeding, resulting in the Commission issuing a Further
Notice of Proposed Rule Making to address the issues raised.
DATES: Comments due July 21, 2003. Reply Comments due August 20, 2003.
ADDRESSES: All filings must be sent to the Commission's Secretary,
Marlene H. Dortch, Office of Secretary, Federal Communications
Commission, 445 12th Street, SW., TW-B204, Washington, DC 20554.
FOR FURTHER INFORMATION CONTACT: John Reed (202) 418-2455, Policy and
Rules Division, Office of Engineering and Technology.
SUPPLEMENTARY INFORMATION: This is a summary of the Further Notice of
Proposed Rule Making portion of the Commission's Memorandum Opinion and
Order and Further Notice of Proposed Rule Making, FCC 03-33, adopted
February 13, 2003, and released March 12, 2003. The full text of this
document is available for inspection and copying during regular
business hours in the FCC Reference Center (Room CY-A257), 445 12th
Street, SW., Washington, DC 20554. The complete text of this document
also may be purchased from the Commission's copy contractor, Qualex
International, 445 12th Street, SW., Room, CY-B402, Washington, DC
20554. The full text may also be downloaded at: http://www.fcc.gov.
Alternative formats are available to persons with disabilities by
contacting Brian Millin at (202) 418-7426 or TTY (202) 418-7365.
Summary of Further Notice of Proposed Rule Making
1. On February 14, 2002, the Commission adopted a First Report and
Order implementing regulations to permit the unlicensed operation of
ultra-wideband transmission systems. Fourteen petitions for
reconsideration were filed in response to that Order. New rules were
proposed to address issues raised by MSSI and by Siemens regarding the
operation of low pulse repetition frequency (PRF) UWB systems,
including vehicular radars, in the 3.1-10.6 GHz band; and the operation
of frequency hopping vehicular radars in the 22-29 GHz band as UWB
devices. The Commission also proposed new rules that would establish
new peak power limits for wideband Part 15 devices that do not operate
as UWB devices and proposed to eliminate the definition of a UWB
device.
2. Proposed changes to the UWB standards to accommodate the MSSI
radar system. Comments are requested on allowing UWB systems that
employ a pulse repetition frequency (PRF) no greater than 200 kHz to be
used for any type of application in the 3.1 GHz to 10.6 GHz band. MSSI
specifically mentioned vehicular radar systems as an example of such
equipment. The emission standards limit the interference potential of
low PRF emitters. As the PRF decreases below a certain level, depending
on the RBW used to measure the peak emission, the peak limit becomes
the defining standard and the average emission level generated in a 1
MHz RBW decreases below the limit specified in the regulations.
Accordingly, UWB devices employing a low PRF are limited in their
output levels by the standard on peak emission levels, not by the
standard on average emission levels. Comments are requested on whether
a different PRF limit should be employed, if any other changes to the
standards, including changes to the emission limits, are necessary to
incorporate this addition to the type of UWB devices permitted to
operate outdoors, or if the addition to the operation of outdoor UWB
devices should be expanded only to include low PRF vehicular radar
systems. Specific technical analyses supporting the comments are
requested.
3. Proposed changes to the UWB standards to accommodate the Siemens
VDO radar system. Siemens requested an amendment of the rules to permit
the operation vehicular radar systems in the 22-29 GHz band using
frequency
[[Page 19774]]
hopping modulation to comply with the UWB definition and bandwidth
requirements, provided the measurements are averaged over a 10
millisecond period. Siemens VDO also requested that vehicular radar
systems be permitted to comply with the RMS average emission limits
based on averaging over a 10 millisecond time period. The Commission
agrees that public comment should be obtained on Siemens VDO's
proposal. This proposal is limited solely to vehicle radar systems
operating in the 22-29 GHz band. Further, no changes are proposed to
the emission limits applied to UWB vehicular radar systems. Rather, we
are proposing new measurement techniques that may accommodate frequency
hopping systems as UWB vehicular radars. We propose to permit frequency
hopping systems to operate under the provisions for UWB vehicular radar
systems provided the minimum UWB bandwidth is achieved in no greater
than 10 milliseconds and the transmitter complies with all other
technical standards for UWB operation in the 22-29 GHz band. Compliance
with the average emission limit would be based on measurement using a
one megahertz resolution bandwidth (RBW), a video bandwidth equal to or
greater than the RBW, an RMS detector function, and a maximum 10
millisecond averaging time. The peak measurement would be required to
be performed as currently specified in the rules using a peak hold
detector and shall be performed over a sufficiently long period that
the peak levels being measured cease increasing.
4. Comments are requested on whether the higher instantaneous power
delivered by a frequency hopping system would cause harmful
interference to these systems. Comments also are requested on the
proposed measurement procedures. For example, should the peak
measurement be performed with the hopping sequence stopped; should a
different averaging time be employed; should the averaging time be
based on the number of hops and the dwell time of the hops; and should
a maximum time be specified within which all hopping channels must be
used? Comments also are sought on the measurement procedure that would
be used to demonstrate compliance with the UWB bandwidth limit. Siemens
requests that the bandwidth be measured based on two different possible
procedures described in the appendix to its petition. Both of the
procedures suggested by Siemens are performed with the frequency
hopping system active. However, we are concerned that those procedures
may not indicate the actual bandwidth employed by the system and the
corresponding distribution of RF energy, depending on various technical
parameters of the actual hopping system, e.g., the distribution of the
hopping channels, the dwell times for the hops, the number of hopping
channels, the separation of the channels, the bandwidth of a single
hopping channel, the number of hops in a specified time period, etc.
Thus, we propose that the bandwidth be measured by first measuring the
-10 dB bandwidth of a single hopping channel based on use of a peak
hold detector and a 1 MHz resolution bandwidth, determining how many
non-overlapping hops occur within a 10 millisecond period and
multiplying the two values. Comments are requested on this proposed
measurement procedure as well as the procedures described by the
petitioner. Comments also are requested on any interference concerns
that arise from this new modulation type or its method of measurement.
The comments should address specific interference concerns such as
possible interference to Amateur Radio Service operations, including
amateur satellite systems, to EESS operation, and to police radar
operations and should include a technical justification. Comments are
requested on whether the compliance measurement procedure proposed by
the petitioner is applicable only to systems that are similar to its
vehicular radar system or if they are applicable to vehicular radar
systems in general. Do the various system parameters need to be limited
to a specific range of values for the measurements to be meaningful? If
so, what is the range of parameters over which the limits are to be
applied? Can a general measurement procedure be developed that is
applicable for a full range of system parameters? If so, what is this
measurement procedure? The measurement procedure proposed by the
petitioner involves a power measurement over a 10 millisecond averaging
time period. Comments are requested as to whether these time averaged
measurements should be made using a spectrum analyzer in a swept
frequency mode or should the spectrum analyzer be stepped across the
frequency band of interest in discrete steps with a defined dwell time
at each step. Comments also are requested on the adequacy of the
measurement results for the purpose of quantifying the impact to
systems that could receive interference from the frequency hopping
vehicular radar systems. Comments also are requested on any limits that
should be applied to the number of hopping channels, the maximum
occupancy time permitted for a hopping channel during any full hopping
sequence, the maximum time it takes to complete a full hopping
sequence, and any other pertinent technical characteristics.
5. Proposed changes to the non-UWB standards to accommodate
wideband Part 15 transmitters. The peak emission limit specified in 47
CFR 15.35(b) was established based on the operation of narrowband
transmission systems and may unfairly penalize some wideband
operations. A limit similar to that adopted in the R&O for UWB systems
is proposed to eliminate the bias under the part 15 regulations towards
narrowband operation. Under the UWB regulations, the EIRP limit on peak
emissions is 0 dBm based on the use of a 50 MHz resolution bandwidth
(RBW). A lower RBW may be employed, down to as low as 1 MHz, provided
the peak limit is similarly reduced to the level 20 log (RBW/50) dBm
EIRP, where RBW is the resolution bandwidth in megahertz. UWB systems
also must operate with a -10 dB fractional bandwidth of at least 0.2 or
have a -10 dB bandwidth of at least 500 MHz, whichever is less. Below
2.5 GHz, the fractional bandwidth is dominant and above 2.5 GHz the 500
MHz bandwidth limit dominates. Because we appear to be dealing
primarily with systems operating above 2.5 GHz, we will employ the 500
MHz minimum UWB bandwidth as a guideline for simplicity. Thus, the
maximum resolution bandwidth that is used to measure peak limit for UWB
emitters is one-tenth of the minimum UWB bandwidth. Accordingly, it
appears that a peak limit, equivalent to the UWB standards, can be
established for conventional part 15 devices based on a limit of 20 log
(RBW/50) dBm EIRP where RBW is the resolution bandwidth of the
measurement instrument in megahertz and where RBW must not be greater
than one-tenth of the -10 dB bandwidth of the emission being measured.
6. We propose to amend 47 CFR 15.35(b) to clarify the existing
requirements as requested by MSSI, and to provide an alternative
standard for peak emission limits for wideband Part 15 transmission
systems. The specific proposed changes to this rule paragraph are shown
in the rules section at the end of this summary. Comments are requested
on this proposal. Comments also are requested on the alternative
proposal presented by MSSI, namely should the rules be amended to
permit devices operating above 1000 MHz under the part 15 general
emission standards in 47 CFR 15.209 to comply with a peak emission
limit of 5000 uV/
[[Page 19775]]
m at 3 meters based on a measurement using a peak detector, a 1 MHz
resolution bandwidth and a video bandwidth no less than 1 MHz? We
request comments on any changes to the interference potential of
wideband part 15 devices that may occur as a result of these proposals.
Technical support is requested for comments arguing interference
concerns.
7. UWB definition. The minimum UWB bandwidth requirement could
cause a manufacturer to design transmitters that occupy more bandwidth
than is operationally necessary or transmitters that inject noise to
increase the occupied bandwidth simply to permit operation under the
UWB regulations. Such systems would place greater energy in frequency
bands where operation is not necessary for the system to function.
Thus, a minimum bandwidth standard can be counterproductive to reducing
the potential for harmful interference. For this reason, we are
proposing to eliminate the definition of an ultra-wideband transmitter
in 47 CFR 15.503(d). In its place, we would permit the operation of any
transmission system, regardless of its bandwidth, as long as it
complies with the standards for UWB operation set forth in Subpart F of
47 CFR 15. We also propose to change the limit on peak power to the
same limit we proposed above for non-UWB operation. This will ensure
that excessive peak power levels are not permitted from narrowband
systems. Comments are requested on this proposal. We request comments
on any potential increase or decrease in interference potential to
authorized radio services that could be caused by the adoption of this
proposal. The comments should address the interference potential from
narrowband systems operating under the UWB regulations. The comments
also should address whether additional standards, such as a spectral
power density limit based on a bandwidth narrower than 1 MHz, are
needed. All comments should be based on a technical analysis of the
interference potential.
Administrative Provisions
8. Initial Regulatory Flexibility Analysis. As required by Section
603 of the Regulatory Flexibility Act,\1\ the Commission has prepared
an Initial Regulatory Flexibility Analysis (IRFA) of the expected
significant economic impact on small entities by the policies and rules
proposed in this Further Notice of Proposed Rule Making (``Further
Notice''). Written public comments are requested on the IRFA. Comments
must be identified as responses to the IRFA and must be filed by the
deadlines for comments on the Further Notice provided in paragraph 175
of the item. The Commission shall send a copy of this Further Notice,
including the IRFA, to the Chief Counsel for Advocacy of the Small
Business Administration in accordance with paragraph 603(a) of the
Regulatory Flexibility Act. In addition, the Further Notice and the
IRFA (or summaries thereof) will be published in the Federal
Register.\2\
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\1\ 5 U.S.C. 603.
\2\ 5 U.S.C. 603(a).
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A. Reason for Action
This rulemaking proposal is initiated to obtain comments regarding
proposed changes to the regulations for radio frequency devices that do
not require a license to operate. The Commission seeks to determine if
its standards should be amended to permit the operation of vehicular
radar and other low-pulse repetition frequency outdoor UWB devices in
the 3.1-10.6 GHz band and to permit the operation of frequency hopping
vehicular radar systems in the 22-29 GHz band under the UWB
regulations. It also seeks to amend the peak power limit on non-UWB
unlicensed devices.
B. Legal Basis
The proposed action is taken pursuant to sections 4(i), 301, 302,
303(e), 303(f), 303(r), 304 and 307 of the Communications Act 10 1934,
as amended, 47 U.S.C. sections 154(i), 301, 302, 303(e), 303(f),
303(r), 304, and 307.
C. Description and Estimate of the Number of Small Entities to Which
the Proposed Rules Will Apply
The RFA directs agencies to provide a description of, and where
feasible, an estimate of the number of small entities that may be
affected by the proposed rules, if adopted.\3\ The RFA generally
defines the term ``small entity'' as having the same meaning as the
terms ``small business,'' ``small organization,'' and ``small
governmental jurisdiction.''\4\ In addition, the term ``small
business'' has the same meaning as the term ``small business concern''
under the Small Business Act.\5\ 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).\6\
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\3\ 5 U.S.C. 603(b)(3).
\4\ 5 U.S.C. 601(6).
\5\ 5 U.S.C. 601(3) (incorporating by reference the definition
of ``small-business concern'' in the Small Business Act, 15 U.S.C.
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.''
\6\ 15 U.S.C. 632.
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A small organization is generally ``any not-for-profit enterprise
which is independently owned and operated and is not dominant in its
field.''\7\ Nationwide, as of 1992, there were approximately 275,801
small organizations.\8\ ``Small governmental jurisdiction'' \9\
generally means ``governments of cities, counties, towns, townships,
villages, school districts, or special districts, with a population of
less than 50,000.'' \10\ As of 1992, there were approximately 85,006
governmental entities, total, in the United States.\11\ This number
includes 38,978 cities, counties, and towns; of these, 37,566, or 96%,
have populations of fewer than 50,000.\12\ The Census Bureau estimates
that this ratio is approximately accurate for all governmental
entities. Thus, of the 85,006 governmental entities, we estimate that
81,600 (96%) are small entities. Nationwide, as of 1992, there were
4.44 million small business firms, according to SBA data.\13\
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\7\ 5 U.S.C. 601(4).
\8\ U.S. Department of Commerce, Bureau of the Census, 1992
Economic Census, Table 6 (special tabulation of data under contract
to the Office of Advocacy of the U.S. Small Business
Administration).
\9\ 47 CFR 1.1162.
\10\ 5 U.S.C. 601(5).
\11\ U.S. Department of Commerce, Bureau of the Census, 1992
Census of Governments.
\12\ U.S. Department of Commerce, Bureau of the Census, 1992
Census of Governments.
\13\ U.S. Department of Commerce, Bureau of the Census, 1992
Census of Transportation, Communications, and Utilities, UC 92-S-1,
Subject Series, Establishment and Firm Size, Table 2D, Employment
Size of Firms.
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The SBA has developed a small business size standard for wireless
firms within the two broad economic census categories of Paging \14\
and Cellular and Other Wireless Telecommunications.\15\ Under both SBA
categories, a wireless business is small if it has 1,500 or fewer
employees. For the census category of Paging, Census Bureau data for
1997 show that there were 1320 firms in this category, total, that
operated for the entire year.\16\ Of this total, 1303 firms
[[Page 19776]]
had employment of 999 or fewer employees, and an additional 17 firms
had employment of 1,000 employees or more.\17\ Thus, under this
category and associated small business size standard, the great
majority of firms can be considered small. For the census category
Cellular and Other Wireless Telecommunications firms, Census Bureau
data for 1997 show that there were 977 firms in this category, total,
that operated for the entire year.\18\ Of this total, 965 firms had
employment of 999 or fewer employees, and an additional 12 firms had
employment of 1,000 employees or more.\19\ Thus, under this second
category and size standard, the great majority of firms can, again, be
considered small.
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\14\ 13 CFR 121.201, NAICS code 513321 (changed to 517211 in
October 2002).
\15\ 13 CFR 121.201, NAICS code 513322 (changed to 517212 in
October 2002).
\16\ U.S. Census Bureau, 1997 Economic Census, Subject Series:
Information, ``Employment Size of Firms Subject to Federal Income
Tax: 1997,'' Table 5, NAICS code 513321 (issued Oct. 2000).
\17\ Id. The census data do not provide a more precise estimate
of the number of firms that have employment of 1,500 or fewer
employees; the largest category provided is ``Firms with 1,000
employees or more.''
\18\ U.S. Census Bureau, 1997 Economic Census, Subject Series:
Information, ``Employment Size of Firms Subject to Federal Income
Tax: 1997,'' Table 5, NAICS code 513322 (issued Oct. 2000).
\19\ Id. The census data do not provide a more precise estimate
of the number of firms that have employment of 1,500 or fewer
employees; the largest category provided is ``Firms with 1,000
employees or more.''
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The SBA has established a small business size standard for Radio
and Television Broadcasting and Wireless Communications Equipment
Manufacturing. Under this standard, firms are considered small if they
have 750 or fewer employees.\20\ Census Bureau data for 1997 indicate
that, for that year, there were a total of 1,215 establishments in this
category.\21\ Of those, there were 1,150 that had employment under 500,
and an additional 37 that had employment of 500 to 999. Thus, under
this size standard, the majority of establishments can be considered
small.
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\20\ 13 CFR 121.201, NAICS code 334220.
\21\ U.S. Census Bureau, 1977 Economic Census, Industry Series:
Manufacturing, ``Industry Statistics by Employment Size,'' Table 4,
NAICS code 334220 (issued August 1999).
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Satellite Telecommunications. The SBA has developed a small
business size standard for Satellite Telecommunications Carriers, which
consists of all such companies having $12.5 million or less in annual
receipts.\22\ In addition, a second SBA size standard for Other
Telecommunications includes ``facilities operationally connected with
one or more terrestrial communications systems and capable of
transmitting telecommunications to or receiving telecommunications from
satellite systems,''\23\ and also has a size standard of annual
receipts of $12.5 million or less. According to Census Bureau data for
1997, there were 324 firms in the category Satellite
Telecommunications, total, that operated for the entire year.\24\ Of
this total, 273 firms had annual receipts of $5 million to $9,999,999
and an additional 24 firms had annual receipts of $10 million to
$24,999,990.\25\ Thus, under this size standard, the majority of firms
can be considered small. In addition, according to Census Bureau data
for 1997, there were 439 firms in the category Satellite
Telecommunications, total, that operated for the entire year.\26\ Of
this total, 424 firms had annual receipts of $5 million to $9,999,999
and an additional 6 firms had annual receipts of $10 million to
$24,999,990.\27\ Thus, under this second size standard, the majority of
firms can be considered small.
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\22\ 13 CFR 121.201, North American Industry Classification
System (NAICS) code 517410 (formerly 513340).
\23\ Id. NAICS code 517910 (formerly 513390).
\24\ U.S. Census Bureau, 1997 Economic Census, Subject Series:
Information, ``Receipt Size of Firms Subject to Federal Income Tax:
1997,'' Table 4, NAICS code 517410 (issued Oct. 2000).
\25\ Id.
\26\ U.S. Census Bureau, 1997 Economic Census, Subject Series:
Information, ``Receipt Size of Firms Subject to Federal Income Tax:
1997,'' Table 4, NAICS code 517910 (issued Oct. 2000).
\27\ Id.
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As no party currently is permitted to market or operate the
proposed UWB standards, there will not be any impact on any small
entities. On the other hand, the proposed change in the limit on peak
power levels may relax the current emission limit for wideband
transmission systems. The Commission does not have an estimated number
for the small entities that may produce such products but believes that
there are only a few in existence.
D. Description of Projected Reporting, Recordkeeping and Other
Compliance Requirements for Small Entities
Part 15 transmitters are already required to be authorized under
the Commission's certification procedure as a prerequisite to marketing
and importation. The reporting and recordkeeping requirements
associated with these equipment authorizations would not be changed by
the proposals contained in this Notice. These changes to the
regulations would permit the introduction of an entirely new category
of radio transmitters. The change in the method of measuring peak power
for wideband transmitters will result in a slight relaxation of the
peak power limit standard on these devices.
E. Steps Taken To Minimize the Significant Economic Impact on Small
Entities, and Significant Alternatives Considered
The RFA requires an agency to describe any significant,
specifically small business, alternatives that it has considered in
reaching its proposed approach, which may include the following four
alternatives (among others): ``(1) the establishment of differing
compliance or reporting requirements or timetables that take into
account the resources available to small entities; (2) the
clarification, consolidation, or simplification of compliance and
reporting requirements under the rule for such small entities; (3) the
use of performance rather than design standards; and (4) an exemption
from coverage of the rule, or any part thereof, for such small
entities.''\28\
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\28\ 5 U.S.C. 603(c)(1) through (c)(4).
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The standards proposed in this proceeding are based on equipment
performance and not on equipment design. As no party currently is
permitted to market or operate the proposed UWB standards, there will
not be any impact on any small entities. On the other hand, the
proposed change in the limit on peak power levels may relax the current
emission limit for wideband transmission systems.
F. Federal Rules That May Duplicate, Overlap, or Conflict With the
Proposed Rule
None.
9. Request for Comments: This is a permit-but-disclose notice and
comment rulemaking proceeding. Ex parte presentations are permitted,
except during the Sunshine Agenda period, provided they are disclosed
as provided in the Commission's rules. See generally 47 CFR 1.1202,
1.1203, and 1.2306(a).
10. Pursuant to Sec. Sec. 1.415 and 1.419 of the Commission's
Rules, 47 CFR 1.415 and 1.419, interested parties may file comments on
or before July 21, 2003, and reply comments on or before August 20,
2003. Comments may be filed using the Commission's Electronic Comment
Filing System (ECFS), http://www.fcc.gov/e-file/ecfs.html, or by filing
paper copies. See Electronic Filing of Documents in Rulemaking
Proceedings, 63 FR 23121 (1998).
11. Comments filed through the ECFS can be sent as an electronic
file via the Internet to http://www.fcc.gov/e-file/ecfs.html.
Generally, only one copy of an electronic submission must be filed. If
multiple docket or rulemaking numbers appear in the caption of this
proceeding, however, commenters must
[[Page 19777]]
transmit one electronic copy of the comments to each docket or
rulemaking number referenced in the caption. In completing the
transmittal screen, commenters should include their full name, Postal
Service mailing address, and the applicable docket or rulemaking
number. Parties may also submit an electronic comment by Internet e-
mail. To get filing instructions for e-mail comments, commenters should
send an e-mail to ecfs@fcc.gov, and should including the following
words in the body of the message, ``get form '' A
sample form and directions will be sent in reply.
12. Parties who choose to file by paper must file an original and
four copies of each filing. If more than one docket or rulemaking
number appears in the caption of this proceeding, commenters must
submit two additional copies for each additional docket or rulemaking
number. All filings must be sent to the Commission's Secretary, Marlene
H. Dortch, Office of the Secretary, Federal Communications Commission,
445 12th Street, SW., TW-A325, Washington, DC 20554. Comments and reply
comments will be available for public inspection during regular
business hours in the FCC Reference Center of the Federal
Communications Commission, Room TW-A306, 445 12th Street, SW.,
Washington, DC 20554.
13. The proposed action is authorized under Sections 4(i), 301,
302, 303(e), 303(f), 303(r), 304 and 307 of the Communications Act of
1934, as amended, 47 U.S.C. 154(i), 301, 302, 303(e), 303(f), 303(r),
304, and 307.
List of Subjects in 47 CFR Part 15
Communications equipment, Radio, Reporting and recordkeeping
requirements, Security measures.
Federal Communications Commission.
Marlene H. Dortch,
Secretary.
Proposed Rule Changes
For the reasons discussed in the preamble, title 47 of the Code of
Federal Regulations, part 15, is proposed to be amended 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 specified, on any frequency or frequencies
above 1000 MHz, the radiated emission limits are based on the use of
measurement instrumentation employing an average detector function.
Unless otherwise specified, average measurements above 1000 MHz shall
be performed using a minimum resolution bandwidth of 1 MHz. When
average radiated emission measurements are specified in this part,
including emission measurements below 1000 MHz, there also is a limit
on the peak radio frequency emissions. UWB devices operating under
subpart F of this part shall comply with the peak limits specified in
that subpart. For all other part 15 devices subject to limits based on
average radiated emissions, the peak level shall comply with one of the
following two levels, at the option of the responsible party:
(1) Unless a different peak limit is specified in the rules, e.g.,
see Sec. 15.255 of this chapter, the total peak power shall not exceed
by more than 20 dB the average limit permitted at the frequency being
investigated. Note that a pulse desensitization correction factor may
be required to measure the total peak emission level.
(2) The peak power shall not exceed an EIRP of 20 log (RBW/50) dBm
where RBW is the resolution bandwidth in MHz employed by the
measurement instrument. The RBW may not be lower than 1 MHz or greater
than 50 MHz. Further, the RBW used in the measurement instrument shall
not be greater than one-tenth of the -10 dB bandwidth of the device
under test.
* * * * *
[FR Doc. 03-9880 Filed 4-21-03; 8:45 am]
BILLING CODE 6712-01-P