Goto Section: 97.301 | 97.305 | Table of Contents
FCC 97.303
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 97.303 Frequency sharing requirements.
The following paragraphs summarize the frequency sharing requirements that
apply to amateur stations transmitting in the frequency bands specified in
§ 97.301 of this part. Each frequency band allocated to the amateur service
is designated as either a secondary service or a primary service. A station
in a secondary service must not cause harmful interference to, and must
accept interference from, stations in a primary service.
(a) Where, in adjacent ITU Regions or sub-Regions, a band of frequencies is
allocated to different services of the same category (i.e., primary or
secondary services), the basic principle is the equality of right to
operate. Accordingly, stations of each service in one Region or sub-Region
must operate so as not to cause harmful interference to any service of the
same or higher category in the other Regions or sub-Regions.
(b) Amateur stations transmitting in the 70 cm band, the 33 cm band, the 23
cm band, the 9 cm band, the 5 cm band, the 3 cm band, or the 24.05-24.25 GHz
segment must not cause harmful interference to, and must accept interference
from, stations authorized by the United States Government in the
radiolocation service.
(c) Amateur stations transmitting in the 76-77.5 GHz segment, the 78-81 GHz
segment, the 136-141 GHz segment, or the 241-248 GHz segment must not cause
harmful interference to, and must accept interference from, stations
authorized by the United States Government, the FCC, or other nations in the
radiolocation service.
(d) Amateur stations transmitting in the 430-450 MHz segment, the 23 cm
band, the 3.3-3.4 GHz segment, the 5.65-5.85 GHz segment, the 13 cm band, or
the 24.05-24.25 GHz segment, must not cause harmful interference to, and
must accept interference from, stations authorized by other nations in the
radiolocation service.
(e) Amateur stations receiving in the 33 cm band, the 2400-2450 MHz segment,
the 5.725-5.875 GHz segment, the 1.2 cm band, the 2.5 mm band, or the
244-246 GHz segment must accept interference from industrial, scientific,
and medical (ISM) equipment.
(f) Amateur stations transmitting in the following segments must not cause
harmful interference to radio astronomy stations: 3.332-3.339 GHz,
3.3458-3.3525 GHz, 76-77.5 GHz, 78-81 GHz, 136-141 GHz, 241-248 GHz, 275-323
GHz, 327-371 GHz, 388-424 GHz, 426-442 GHz, 453-510 GHz, 623-711 GHz,
795-909 GHz, or 926-945 GHz. In addition, amateur stations transmitting in
the following segments must not cause harmful interference to stations in
the Earth exploration-satellite service (passive) or the space research
service (passive): 275-277 GHz, 294-306 GHz, 316-334 GHz, 342-349 GHz,
363-365 GHz, 371-389 GHz, 416-434 GHz, 442-444 GHz, 496-506 GHz, 546-568
GHz, 624-629 GHz, 634-654 GHz, 659-661 GHz, 684-692 GHz, 730-732 GHz,
851-853 GHz, or 951-956 GHz.
(g) [Reserved]
(h) 60 m band: (1) In the 5330.5-5406.4 kHz band (60 m band), amateur
stations may transmit only on the five center frequencies specified in the
table below. In order to meet this requirement, control operators of
stations transmitting phone, data, and RTTY emissions (emission designators
2K80J3E, 2K80J2D, and 60H0J2B, respectively) may set the carrier frequency
1.5 kHz below the center frequency as specified in the table below. For CW
emissions (emission designator 150HA1A), the carrier frequency is set to the
center frequency. Amateur operators shall ensure that their emissions do not
occupy more than 2.8 kHz centered on each of these center frequencies.
60 M Band Frequencies (kHz)
Carrier Center
5330.5 5332.0
5346.5 5348.0
5357.0 5358.5
5371.5 5373.0
5403.5 5405.0
(2) Amateur stations transmitting on the 60 m band must not cause harmful
interference to, and must accept interference from, stations authorized by:
(i) The United States (NTIA and FCC) and other nations in the fixed service;
and
(ii) Other nations in the mobile except aeronautical mobile service.
(i) Amateur stations transmitting in the 7.2-7.3 MHz segment must not cause
harmful interference to, and must accept interference from, international
broadcast stations whose programming is intended for use within Region 1 or
Region 3.
(j) Amateur stations transmitting in the 30 m band must not cause harmful
interference to, and must accept interference from, stations by other
nations in the fixed service. The licensee of the amateur station must make
all necessary adjustments, including termination of transmissions, if
harmful interference is caused.
(k) For amateur stations located in ITU Regions 1 and 3: Amateur stations
transmitting in the 146-148 MHz segment or the 10.00-10.45 GHz segment must
not cause harmful interference to, and must accept interference from,
stations of other nations in the fixed and mobile services.
(l) In the 219-220 MHz segment:
(1) Use is restricted to amateur stations participating as forwarding
stations in fixed point-to-point digital message forwarding systems,
including intercity packet backbone networks. It is not available for other
purposes.
(2) Amateur stations must not cause harmful interference to, and must accept
interference from, stations authorized by:
(i) The FCC in the Automated Maritime Telecommunications System (AMTS), the
218-219 MHz Service, and the 220 MHz Service, and television stations
broadcasting on channels 11 and 13; and
(ii) Other nations in the fixed and maritime mobile services.
(3) No amateur station may transmit unless the licensee has given written
notification of the station's specific geographic location for such
transmissions in order to be incorporated into a database that has been made
available to the public. The notification must be given at least 30 days
prior to making such transmissions. The notification must be given to: The
American Radio Relay League, Inc., 225 Main Street, Newington, CT
06111-1494.
(4) No amateur station may transmit from a location that is within 640 km of
an AMTS coast station that operates in the 217-218 MHz and 219-220 MHz bands
unless the amateur station licensee has given written notification of the
station's specific geographic location for such transmissions to the AMTS
licensee. The notification must be given at least 30 days prior to making
such transmissions. The location of AMTS coast stations using the
217-218/219-220 MHz channels may be obtained as noted in paragraph (l)(3) of
this section.
(5) No amateur station may transmit from a location that is within 80 km of
an AMTS coast station that uses frequencies in the 217-218 MHz and 219-220
MHz bands unless that amateur station licensee holds written approval from
that AMTS licensee. The location of AMTS coast stations using the
217-218/219-220 MHz channels may be obtained as noted in paragraph (l)(3) of
this section.
(m) In the 70 cm band:
(1) No amateur station shall transmit from north of Line A in the 420-430
MHz segment. See § 97.3(a) for the definition of Line A.
(2) Amateur stations transmitting in the 420-430 MHz segment must not cause
harmful interference to, and must accept interference from, stations
authorized by the FCC in the land mobile service within 80.5 km of Buffalo,
Cleveland, and Detroit. See § 2.106, footnote US230 for specific frequencies
and coordinates.
(3) Amateur stations transmitting in the 420-430 MHz segment or the 440-450
MHz segment must not cause harmful interference to, and must accept
interference from, stations authorized by other nations in the fixed and
mobile except aeronautical mobile services.
(n) In the 33 cm band:
(1) Amateur stations must not cause harmful interference to, and must accept
interference from, stations authorized by:
(i) The United States Government;
(ii) The FCC in the Location and Monitoring Service; and
(iii) Other nations in the fixed service.
(2) No amateur station shall transmit from those portions of Texas and New
Mexico that are bounded by latitudes 31°41′ and 34°30′ North and longitudes
104°11′ and 107°30′ West; or from outside of the United States and its
Region 2 insular areas.
(3) No amateur station shall transmit from those portions of Colorado and
Wyoming that are bounded by latitudes 39° and 42° North and longitudes 103°
and 108° West in the following segments: 902.4-902.6 MHz, 904.3-904.7 MHz,
925.3-925.7 MHz, and 927.3-927.7 MHz.
(o) Amateur stations transmitting in the 23 cm band must not cause harmful
interference to, and must accept interference from, stations authorized by:
(1) The United States Government in the aeronautical radionavigation, Earth
exploration-satellite (active), or space research (active) services;
(2) The FCC in the aeronautical radionavigation service; and
(3) Other nations in the Earth exploration-satellite (active),
radionavigation-satellite (space-to-Earth) (space-to-space), or space
research (active) services.
(p) In the 13 cm band:
(1) Amateur stations must not cause harmful interference to, and must accept
interference from, stations authorized by other nations in fixed and mobile
services.
(2) Amateur stations transmitting in the 2305-2310 MHz segment must not
cause harmful interference to, and must accept interference from, stations
authorized by the FCC in the fixed, mobile except aeronautical mobile, and
radiolocation services.
(q) Amateur stations transmitting in the 3.4-3.5 GHz segment must not cause
harmful interference to, and must accept interference from, stations
authorized by other nations in the fixed and fixed-satellite
(space-to-Earth) services.
(r) In the 5 cm band:
(1) Amateur stations transmitting in the 5.650-5.725 GHz segment must not
cause harmful interference to, and must accept interference from, stations
authorized by other nations in the mobile except aeronautical mobile
service.
(2) Amateur stations transmitting in the 5.850-5.925 GHz segment must not
cause harmful interference to, and must accept interference from, stations
authorized by the FCC and other nations in the fixed-satellite
(Earth-to-space) and mobile services and also stations authorized by other
nations in the fixed service. In the United States, the use of mobile
service is restricted to Dedicated Short Range Communications operating in
the Intelligent Transportation System.
(s) Authorization of the 76-77 GHz segment for amateur station transmissions
is suspended until such time that the Commission may determine that amateur
station transmissions in this segment will not pose a safety threat to
vehicle radar systems operating in this segment.
(t) Amateur stations transmitting in the 2.5 mm band must not cause harmful
interference to, and must accept interference from, stations authorized by
the United States Government, the FCC, or other nations in the fixed,
inter-satellite, or mobile services.
Note to § 97.303: The Table of Frequency Allocations contains the complete,
unabridged, and legally binding frequency sharing requirements that pertain
to the Amateur Radio Service. See 47 CFR 2.104, 2.105, and 2.106. The United
States, Puerto Rico, and the U.S. Virgin Islands are in Region 2 and other
U.S. insular areas are in either Region 2 or 3; see appendix 1 to part 97.
[ 75 FR 27203 , May 14, 2010, as amended at 77 FR 5412 , Feb. 3, 2012; 80 FR 38912 , July 7, 2015]
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Goto Section: 97.301 | 97.305
Goto Year: 2014 |
2016
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