The frequency 5167.5 kHz may be used by any station authorized under this part to communicate with any other station in the State of Alaska for emergency communications. The maximum power permitted is 150 watts peak envelope power (PEP). All stations operating on this frequency must be located in or within 50 nautical miles (92.6 km) of the State of Alaska. This frequency may also be used by stations authorized in the Alaska-private fixed service for calling and listening, but only for establishing communication before switching to another frequency.
[49 FR 32201, Aug. 13, 1984]
(a) The following criteria shall govern the authorization and use of frequencies within the band 72-76 MHz by fixed stations. (For call box operations see § 90.241).
(1) The following frequencies in the band 72-76 MHz may be used for fixed operations:
| 72.02 | 72.80 |
| 72.04 | 72.82 |
| 72.06 | 72.84 |
| 72.08 | 72.86 |
| 72.10 | 72.88 |
| 72.12 | 72.90 |
| 72.14 | 72.92 |
| 72.16 | 72.94 |
| 72.18 | 72.96 |
| 72.20 | 72.98 |
| 72.22 | 75.42 |
| 72.24 | 75.46 |
| 72.26 | 75.50 |
| 72.28 | 75.54 |
| 72.30 | 75.58 |
| 72.32 | 75.62 |
| 72.34 | 75.64 |
| 72.36 | 75.66 |
| 72.38 | 75.68 |
| 72.40 | 75.70 |
| 72.42 | 75.72 |
| 72.46 | 75.74 |
| 72.50 | 75.76 |
| 72.54 | 75.78 |
| 72.58 | 75.80 |
| 72.62 | 75.82 |
| 72.64 | 75.84 |
| 72.66 | 75.86 |
| 72.68 | 75.88 |
| 72.70 | 75.90 |
| 72.72 | 75.92 |
| 72.74 | 75.94 |
| 72.76 | 75.96 |
| 72.78 | 75.98 |
(2) All authorizations are subject to the condition that no harmful interference will be caused to television reception on Channels 4 and 5.
(3) The applicant must agree to eliminate any harmful interference caused by his operation to TV reception on either Channel 4 or 5 that might develop by whatever means are necessary. Such action must be taken within 90 days of notification by the Commission. If such interference is not eliminated within the 90-day period, operation of the fixed station will be discontinued.
(4) Vertical polarization must be used.
(5) Whenever it is proposed to locate a 72-76 MHz fixed station less than 128 km (80 mi.) but more than 16 km (10 mi.) from the site of a TV transmitter operating on either channel 4 or 5, or from the post office of a community in which such channels are assigned but not in operation, the fixed station shall be authorized only if there are fewer than 100 family dwelling units (as defined by the U.S. Bureau of the Census), excluding units 112 or more km (70 mi.) distant from the TV antenna site, located within a circle centered at the location of the proposed fixed station. The radius shall be determined by use of the following chart entitled, “Chart for Determining Radius From Fixed Station in 72-76 MHz Band to Interference Contour Along Which 10 Percent of Service From Adjacent Channel Television Station Would Be Destroyed.” Two charts are available, one for Channel 4, and one for Channel 5. The Commission may, however, in a particular case, authorize the location of a fixed station within a circle containing 100 or more family dwelling units upon a showing that:
(i) The proposed site is the only suitable location.
(ii) It is not feasible, technically or otherwise, to use other available frequencies.
(iii) The applicant has a plan to control any interference that might develop to TV reception from his operations.
(iv) The applicant is financially able and agrees to make such adjustments in the TV receivers affected as may be necessary to eliminate any interference caused by his operations.
(v) All applications seeking authority to operate with a separation of less than 16 km (10 mi.) will be returned without action.
(b) The following criteria governs the authorization and use of frequencies in the 72-76 MHz band by mobile stations in the Industrial/Business Pool.
(1) Mobile operation on frequencies in the 72-76 MHz band is subject to the condition that no interference is caused to the reception of television stations operating on Channel 4 or 5. Interference will be considered to occur whenever reception of a regularly used television signal is impaired by signals radiated by stations operating under these rules in the 72 to 76 MHz band regardless of the quality of such reception or the strength of the signal used. In order to minimize the hazard of such interference, it shall be the duty of the licensee to determine whether interference is being caused to television reception, wherever television receivers other than those under the control of the licensee, are located within 31 m. (100 ft.) of any point where the stations licensed under these rules may be operated. In any case, it shall be the responsibility of the licensee to correct, at its own expense, any such interference and if the interference cannot be eliminated by the application of suitable techniques, the operation of the offending transmitter shall be suspended. If the complainant refuses to permit the licensee to apply remedial techniques which demonstrably will eliminate the interference without impairment of the original reception, the licensee is absolved of further responsibility.
(2) The maximum transmitter output power that will be authorized is 1 watt; and each station authorized will be classified and licensed as a mobile station. Any units of such a station, however, may be used to provide the operational functions of a base or fixed station. The antennas of transmitters operating on these frequencies must be directly mounted or installed upon the transmitting unit: Except that when permanently installed aboard a vehicle, antenna and transmitter may be separated as required for convenience in mounting. Horizontal polarization will not be allowed; and the gain of antennas employed shall not exceed that of a halfwave dipole. The maximum bandwidth that will be authorized is 20 kHz. Tone control transmissions are permitted.
(c) Radio remote control of models is permitted on frequencies 10 kHz removed from these frequencies authorized for fixed and mobile operations in the 72-76 MHz band. Remote control operations are secondary to operation of fixed and mobile stations as provided for in this section.
[43 FR 54791, Nov. 22, 1978; 44 FR 32219, June 5, 1979, as amended at 47 FR 51879, Nov. 18, 1982; 49 FR 41249, Oct. 22, 1984; 54 FR 38681, Sept. 20, 1989; 58 FR 30129, May 26, 1993; 60 FR 37268, July 19, 1995; 62 FR 18928, Apr. 17, 1997; 72 FR 35196, June 27, 2007]
(a) 216-220 MHz band.
(1) Frequencies in the 216-220 MHz band may be assigned to applicants that establish eligibility in the Industrial/Business Pool.
(2) All operation is secondary to the fixed and mobile services, including the Low Power Radio Service.
(3) In the 216-217 MHz band, no new assignments will be made after January 1, 2002.
(4) In the 217-220 MHz band, the maximum transmitter output power is 2 watts. The maximum antenna height above average terrain (HAAT) is 152 m (500 feet).
(5) In the 217-220 MHz band, base, mobile, and operational fixed operations are permitted.
(6) Wide area operations will not be authorized. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographical center (latitude and longitude).
(7) Frequencies will be assigned with a 6.25 kHz, 12.5 kHz, 25 kHz or 50 kHz channel bandwidth. Frequencies may be assigned with a channel bandwidth exceeding 50 kHz only upon a showing of adequate justification.
(8) Assignable 6.25 kHz channels will occur in increments of 6.25 kHz from 217.00625 MHz to 219.99375 MHz. Assignable 12.5 kHz channels will occur in increments of 12.5 kHz from 217.0125 MHz to 219.9875 MHz. Assignable 25 kHz channels will occur in increments of 25 kHz from 217.025 MHz to 219.975 MHz. Assignable 50 kHz channels will occur in increments of 50 kHz from 217.025 MHz to 219.975 MHz.
(b) 1427-1432 MHz band.
(1) Frequencies in the 1427-1432 MHz band may be assigned to applicants that establish eligibility in the Public Safety Pool or the Industrial/Business Pool.
(2) All operations in the 1427-1429.5 MHz band are secondary to the Wireless Medical Telemetry Service except in the locations specified in paragraph (b)(4) of this section. At the locations specified in paragraph (b)(4) of this section, all operations are secondary to the Wireless Medical Telemetry Service in the 1429-1431.5 MHz band.
(3) All operations in the 1429.5-1432 MHz band are primary in status except in the locations specified in paragraph (b)(4) of this section. At the locations specified in paragraph (b)(4) of this section, all operations are primary in status in the 1427-1429 MHz and 1431.5-1432 MHz bands.
(4) Locations:
(i) Pittsburgh, Pennsylvania—Counties of Westmoreland, Washington, Beaver, Allegheny and Butler;
(ii) Washington, DC metropolitan area—Counties of Montgomery, Prince George's and Charles in Maryland; Counties of Arlington, Prince William, Fauquier, Loudon, and Fairfax, and Cities of Alexandria, Falls Church, Fairfax, Manassas and Manassas Park in Virginia; and District of Columbia;
(iii) Richmond/Norfolk, Virginia—Counties of Charles City, Chesterfield, Dinwiddie, Goochland, Hanover, Henrico, Isle of Wight, James City, New Kent, Powhatan, Prince George, Southhampton, Surrey, Sussex, and York; Cities of Chesapeake, Colonial Heights, Franklin, Hampton, Hopewell, Newport News, Norfolk, Petersburg, Poquoson, Portsmouth, Richmond, Suffolk, Virginia Beach, and Williamsburg;
(iv) Austin/Georgetown, Texas—Counties of Williamson and Travis;
(v) Battle Creek, Michigan—County of Calhoun;
(vi) Detroit, Michigan—Counties of Oakland, Wayne, Washtenaw, Macomb and Livingston;
(vii) Spokane, Washington—Counties of Spokane, WA and Kootenai, ID.
(5) All operations in the 1429.5-1432 MHz band authorized prior to April 12, 2002 are on a secondary basis.
(6) For secondary operations only fixed stations are permitted. At the locations specified in (b)(4) of this section, secondary operations are performed in the 1429-1431.5 MHz band. For all other locations, secondary operations are performed in the 1427-1429.5 MHz band. The maximum power is 1 watt EIRP.
(7) For primary operations base, mobile, operational fixed and temporary fixed operations are permitted.
(i) At the locations specified in paragraph (b)(4) of this section, primary operations are performed in the 1427-1429 MHz and 1431.5-1432 MHz bands. The maximum ERP limitations are as follows:
| Operation | Frequency range (MHz) | |||
|---|---|---|---|---|
| 1427-1428 | 1428-1428.5 | 1428.5-1429 | 1431.5-1432 | |
| Fixed (watts) | 61.1 | 6.11 | 0.611 | 0.611 |
| Mobile (watts) | 0.611 | 0.611 | 0.015 | 0.015 |
| Temporary fixed (watts) | 0.611 | 0.611 | 0.611 | 0.611 |
(ii) For all other locations, primary operations are performed in the 1429.5-1432 MHz band. The maximum ERP limitations are as follows:
| Operation | Frequency range (MHz) | |||
|---|---|---|---|---|
| 1429.5-1430 | 1430-1430.5 | 1430.5-1431.5 | 1431.5-1432 | |
| Fixed (watts) | 0.611 | 0.611 | 6.11 | 61.1 |
| Mobile (watts) | 0.015 | 0.611 | 0.611 | 0.611 |
| Temporary fixed (watts) | 0.611 | 0.611 | 0.611 | 0.611 |
(8) Wide area operations will not be authorized. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographical center (latitude and longitude).
(9) Assignable frequencies occur in increments of 12.5 kHz from 1427.00625 MHz to 1431.99375 MHz.
(10) Licensees, however, may combine contiguous channels up to 50 kHz, and more than 50 kHz only upon a showing of adequate justification.
(11) For any operation in the 1427-1432 MHz band, the predicted or measured field strength—in the WMTS primary band—at the location of any registered WMTS healthcare facility shall not exceed 150 uV/m. For the locations specified in (b)(4) of this section, WMTS is primary in the 1429-1431.5 MHz band. For all other locations, WMTS is primary in the 1427-1429.5 MHz band.
(c) Authorized uses.
(1) Use of these bands is limited to telemetering purposes.
(2) Base stations authorized in these bands shall be used to perform telecommand functions with associated mobile telemetering stations. Base stations may also command actions by the vehicle itself, but will not be authorized solely to perform this function.
(3) Except for the transmissions that are permitted under § 90.248(f) of this chapter, airborne use is prohibited.
[67 FR 41860, June 20, 2002, as amended at 69 FR 39867, July 1, 2004; 72 FR 35196, June 27, 2007; 75 FR 19284, Apr. 14, 2010]
(a) Frequencies in the 450-470 MHz band as listed in §§ 90.20(c)(3) and 90.35(b)(3) may be assigned to all eligibles for fixed use on a secondary basis to land mobile operations.
(b) Fixed stations located 140 km (87 mi) or more from the center of any urbanized area of 600,000 or more population are limited to a transmitter output power of 75 watts. Fixed stations less than 140 km (87 mi) from the centers of these areas are limited to a transmitter output power of 20 watts. Urbanized areas of 600,000 or more population are defined in the U.S. Census of Population 1970, Vol. 1, Table 20, pages 1-74. The centers of the urbanized areas are determined from the Appendix, page 226, of the U.S. Department of Commerce publication “Airline Distance Between Cities in the United States.”
(c) All fixed systems are limited to one frequency pair with 5 MHz spacing and must employ directional antennas with a front-to-back ratio of 15dB, except that omnidirectional antennas having unity gain may be employed by stations communicating with a minimum of three receiving locations encompassed in a sector of at least 160° in azimuth. Stations authorized for secondary fixed operations prior to July 13, 1992, may continue to operate under the conditions of their initial authorization.
(d)-(e) [Reserved]
(f) Secondary fixed operations pursuant to paragraph (a) of this section will not be authorized on the following frequencies or on frequencies subject to § 90.267, except as provided in § 90.219(d)(3)(ii):
[57 FR 24992, June 12, 1992, as amended at 58 FR 33212, June 16, 1993; 60 FR 37268, July 19, 1995; 62 FR 18928, Apr. 17, 1997; 68 FR 19461, Apr. 21, 2003; 72 FR 35196, June 27, 2007; 83 FR 61097, Nov. 27, 2018]
Frequencies below 25 MHz when shown in the radio pool frequency listings under this part will be assigned to base or mobile stations only upon a satisfactory showing that, from a safety of life standpoint, frequencies above 25 MHz will not meet the operational requirements of the applicant. These frequencies are available for assignment in many areas; however, in individual cases such assignment may be impracticable due to conflicting frequency use authorized to stations in other services by this and other countries. In such cases, a substitute frequency, if found available, may be assigned from the following bands: 1705-1750 kHz, 2107-2170 kHz, 2194-2495 kHz, 2506-2850 kHz, 3155-3400 kHz, or 4438-4650 kHz. Since such assignments are in certain instances subject to additional technical and operation limitations, it is necessary that each application also include precise information concerning transmitter output power, type and directional characteristics, if any, of the antenna, and the minimum necessary hours of operation. (This section is not applicable to the Radiolocation Service, subpart F of this part.)
[72 FR 35196, June 27, 2007]
(a) The use of any particular frequency between 2 and 10 MHz is limited to those frequencies falling within the bands allocated to the fixed and land mobile services as indicated in § 2.106 of the Commission's Rules and Regulations.
(b) Only in the following circumstances will authority be extended to stations to operate on the frequencies between 2 and 10 MHz:
(1) To provide communications circuits in emergency and/or disaster situations, where safety of life and property are concerned;
(2) To provide standby and/or backup communications circuits to regular domestic communications circuits which have been disrupted by disasters and/or emergencies.
(c) The FCC will not accept responsibility for protection of the circuits from harmful interference caused by foreign operations.
(d) In the event that a complaint of harmful interference resulting from operation of these circuits is received from a foreign source, the offending circuit(s) must cease operation on the particular frequency concerned immediately upon notification by the Commission.
(e) In order to accomodate the situations described in paragraphs (c) and (d) of this section, the equipment shall be capable of transmitting and receiving on any frequency within the bands between 2 and 10 MHz and capable of immediate change among the frequencies.
(f) Only 2K80J3E, 100HA1A and those emission types listed in § 90.237(g) are permitted.
(g) Applicants must fulfill eligibility requirements set out in § 90.20(d)(6) and shall submit disaster communications plans pursuant to § 90.129(m).
(h) Training exercises which require use of these frequencies for more than seven hours a week, cumulative, are not authorized without prior written approval from the Commission.
[46 FR 52373, Oct. 27, 1981, as amended at 48 FR 32831, July 19, 1983; 49 FR 48712, Dec. 14, 1984; 62 FR 18929, Apr. 17, 1997; 72 FR 35196, June 27, 2007]
(a) The following center frequencies are available for assignment to fixed stations in the Public Safety Pool or the Industrial/Business Pool, subject to the provisions of this section:
| 169.4250 | 170.2625 | 171.1000 | 406.1250 |
| 169.4375 | 170.2750 | 171.1125 | 406.1750 |
| 169.4500 | 170.2875 | 171.1250 | 412.6625 |
| 169.4625 | 170.3000 | 171.8250 | 412.6750 |
| 169.4750 | 170.3125 | 171.8375 | 412.6875 |
| 169.4875 | 170.3250 | 171.8500 | 412.7125 |
| 169.5000 | 171.0250 | 171.8625 | 412.7250 |
| 169.5125 | 171.0375 | 171.8750 | 412.7375 |
| 169.5250 | 171.0500 | 171.8875 | 412.7625 |
| 170.2250 | 171.0625 | 171.9000 | 412.7750 |
| 170.2375 | 171.0750 | 171.9125 | 415.1250 |
| 170.2500 | 171.0875 | 171.9250 | 415.1750 |
(1) The use of these frequencies is limited to transmitting hydrological or meteorological data.
(2) All use of these frequencies is on a secondary basis to Federal Government stations and the hydrological or meteorological data being handled must be made available on request to governmental agencies.
(3) Other provisions of this part notwithstanding, an operational fixed station operating on these frequencies shall not communicate with any station in the mobile service unless written authorization to do so has been obtained from the Commission.
(4) Persons who desire to operate stations on these frequencies should communicate with the Commission for instructions concerning the procedure to be followed in filing formal application.
(5) After May 27, 2005, for the 169-172 MHz band and January 1, 2008 for the 406-416 MHz band, channels for new operations are limited to an authorized bandwidth not to exceed 11.25 kHz. After those dates, existing systems with an authorized bandwidth of greater than 11.25 kHz (including those systems that expand existing operations) may continue to operate with a bandwidth greater than 11.25 kHz until January 1, 2013. Such operations are limited by paragraphs (a)(6) and (a)(7) of this section.
(6) After May 27, 2005, if a licensee of a channel in the band 169-172 MHz which uses equipment with an authorized bandwidth greater than 11.25 kHz cannot resolve an interference complaint to the satisfaction of an impacted Federal agency or is advised to do so by the Hydro Committee as approved by the FCC, then the licensee must cease operation on the frequency upon notification by the Commission.
(7) After January 1, 2008, if a licensee of a channel in the band 406.1-420 MHz which uses equipment with an authorized bandwidth greater than 11.25 kHz cannot resolve an interference complaint to the satisfaction of an impacted Federal agency or is advised to do so by the Hydro Committee as approved by the FCC, then the licensee must cease operation on the frequency upon notification by the Commission.
(8) After February 13, 2026, no assignments for the frequencies 406.1250 MHz and 406.1750 MHz will be made, but stations with existing assignments may continue to operate on these frequencies.
(9) Existing stations may continue to use the center frequencies 169.575 MHz, 409.675 MHz, 409.725 MHz, and 412.625 MHz until January 1, 2013, subject to the requirements of paragraphs (a)(6) and (a)(7) of this section.
(b) The following frequencies are available for wireless microphone operations to eligibles in this part, subject to the provisions of this paragraph:
Frequencies (MHz)
169.445
169.505
169.545
169.575
169.605
169.995
170.025
170.055
170.245
170.305
171.045
171.075
171.105
171.845
171.875
171.905
(1) On center frequencies 169.575 MHz, 170.025 MHz, 171.075 MHz, and 171.875 MHz, the emission bandwidth shall not exceed 200 kHz. On the other center frequencies listed in this paragraph (b), the emission bandwidth shall not exceed 54 kHz.
(2) The output power shall not exceed 50 milliwatts.
(3) For emissions with a bandwidth not exceeding 54 kHz, the frequency stability of wireless microphones shall limit the total emission to within ±32.5 kHz of the assigned frequency. Emissions with a bandwidth exceeding 54 kHz shall comply with the emission mask in Section 8.3 of ETSI EN 300 422-1 v1.4.2 (2011-08).
(4) Wireless microphone operations are unprotected from interference from other licensed operations in the band. If any interference from wireless microphone operation is received by any Government or non-Government operation, the wireless microphone must cease operation on the frequency involved. Applications are subject to Government coordination.
(c) The following center frequencies are available for assignment to licensees engaged in forest firefighting and conservation activities, subject to the provisions of this section:
| 170.425 | 171.425 | 172.225 |
| 170.475 | 171.475 | 172.275 |
| 170.575 | 171.575 | 172.375 |
(1) These frequencies will be assigned on a secondary basis to any U.S. Government station.
(2) The frequencies 170.425 MHz, 170.475 MHz, 170.575 MHz, 171.425 MHz, 171.575 MHz, 172.225 MHz, and 172.275 MHz will be assigned only to licensees directly responsible for the prevention, detection, and suppression of forest fires.
(3) The frequencies 171.475 MHz and 172.275 MHz will be assigned to licensees directly responsible for the prevention, detection, and suppression of forest fires; or to licensees engaged in forest conservation activities for mobile relay operation only.
(4) The frequencies 170.425 MHz, 170.575 MHz, 171.475 MHz, 172.225 MHz, and 172.375 MHz will be assigned for use only in areas west of the Mississippi River.
(5) The frequencies 170.475 MHz, 171.425 MHz, 171.575 MHz, and 172.275 MHz will be assigned for use only in areas east of the Mississippi River.
(6) All applications for use of these frequencies must be accompanied by a letter of concurrence by the United States Department of Agriculture.
(7) After May 27, 2005, channels for new operations are limited to an authorized bandwidth not to exceed 11.25 kHz. Between May 27, 2005, and January 1, 2013, existing systems with an authorized bandwidth of greater than 11.25 kHz (including those systems that expand existing operations) may continue to operate with a bandwidth greater than 11.25 kHz, subject to the limitations set forth in paragraph (c)(8), of this section.
(8) After May 27, 2005, if a licensee that uses equipment with an authorized bandwidth greater than 11.25 kHz cannot resolve an interference complaint from an impacted Federal agency, then the licensee must cease operation on the frequency upon notification by the Commission.
(d) The frequencies 166.250 MHz and 170.150 MHz are available for assignment to licensees engaged in public safety activities, subject to the provisions of this section:
(1) These frequencies are available for assignment to stations in the Public Safety Pool, only at points within 241.4 km. (150 mi.) of New York, N.Y.;
(2) Operations on these channels is on a secondary basis to any Federal station; and
(3) After May 27, 2005, if a licensee that uses equipment with an authorized bandwidth greater than 11.25 kHz cannot resolve an interference complaint from an impacted Federal agency, then the licensee must cease operation on the frequency upon notification by the Commission.
(4) After May 27, 2005, channels for new operations are limited to an authorized bandwidth not to exceed 11.25 kHz. Between May 27, 2005, and January 1, 2013, existing systems with an authorized bandwidth of greater than 11.25 kHz (including those systems that expand existing operations) may continue to operate with a bandwidth greater than 11.25 kHz, subject to the limitations set forth in paragraph (d)(3), of this section.
(e) The following frequencies are available for use by Medical Radiocommunication Systems:
(1) The frequencies 150.775 MHz, 150.790 MHz, and 163.250 MHz, subject to following provisions:
(i) After May 27, 2005, new assignments for these frequencies shall be authorized only for the purpose of delivering or rendering medical services to individuals (medical radiocommunication systems).
(ii) After May 27, 2005, new operations on the frequency 163.250 MHz are limited to an authorized bandwidth not to exceed 11.25 kHz.
(iii) After January 1, 2008, new operations on the frequencies 150.775 MHz and 150.790 MHz are limited to an authorized bandwidth not to exceed 11.25 kHz.
(iv) Existing systems with an authorized bandwidth of greater than 11.25 kHz (including those systems that expand existing operations) may continue to operate on a primary basis with a bandwidth greater than 11.25 kHz until January 1, 2013. After January 1, 2013, stations that use the frequencies 150.775 MHz, 150.790 MHz, or 163.250 MHz shall be limited to an authorized bandwidth not to exceed 11.25 kHz.
(2) The frequency 152.0075 MHz and frequencies within the bands 462.9375-463.1875 MHz and 467.9375 MHz-468.1875 MHz, subject to the limitations specified in § 90.20.
(f) Incorporation by reference. The material listed in this paragraph (f) is incorporated by reference in this section with the approval of the Director of the Federal Register in accordance with 5 U.S.C. 552(a) and 1 CFR part 51. To enforce any edition other than that specified in this section, the FCC must publish a document in the Federal Register and the material must be available to the public. All approved incorporation by reference (IBR) material is available for inspection at the FCC and the National Archives and Records Administration (NARA). Contact the FCC through the Federal Communications Commission's Reference Information Center, phone: (202) 418-0270. For information on the availability of this material at NARA, visit www.archives.gov/federal-register/cfr/ibr-locations.html or email fr.inspection@nara.gov. The material may be obtained from the following source in this paragraph (f):
(1) European Telecommunications Standards Institute, 650 Route des Lucioles, 06921 Sophia Antipolis Cedex, France. A copy of the standard is also available at http://www.etsi.org/deliver/etsi_en/300400_300499/30042201/01.03.02_60/en_30042201v010302p.pdf.
(i) ETSI EN 300 422-1 V1.4.2 (2011-08): “Electromagnetic compatibility and Radio spectrum Matters (ERM); Wireless microphones in the 25 MHz to 3 GHz frequency range; Part 1: Technical characteristics and methods of measurement,” Copyright 2011, IBR approved for section 15.236(g).
(ii) [Reserved]
(2) [Reserved]
[49 FR 20506, May 15, 1984, as amended at 62 FR 18929, Apr. 17, 1997; 70 FR 21661, Apr. 27, 2005; 80 FR 71731, Nov. 17, 2015; 82 FR 41562, Sept. 1, 2017; 85 FR 64410, Oct. 13, 2020; 88 FR 21450, Apr. 10, 2023; 91 FR 1429, Jan. 14, 2026]
(a) The use of any particular frequency between 2 and 25 MHz is limited to those frequencies falling within the bands allocated to the fixed and land mobile services as indicated in § 2.106 of the Commission's Rules and Regulations.
(b) Only in the following circumstances will authority be extended to stations to operate on the frequencies below 25 MHz:
(1) To provide communications circuits to support operations which are highly important to the national interest and where other means of telecommunication are unavailable;
(2) To provide standby and/or backup communications circuits to regular domestic communications circuits which have been disrupted by disasters and/or emergencies.
(c) No protection is afforded to users of these frequencies from harmful interference caused by foreign operations.
(d) In the event that a complaint of harmful interference resulting from operation of these circuits is received from a foreign source, the offending circuit(s) must cease operation on the particular frequency concerned immediately upon notification by the Commission.
(e) In order to accommodate the situations described in paragraphs (c) and (d) of this section, the equipment shall be capable of transmitting and receiving on any frequency within the bands between 2 and 25 MHz and capable of immediate change among the frequencies, provided, however, that this requirement does not apply to equipment manufactured prior to August 15, 1983.
(f) Only 2K80J3E, 100HA1A, 100HA1B and those emission types listed in § 90.237(g) are permitted.
(g) Applicants must fulfill eligibility requirements set out in § 90.35(c)(1) and submit communications plans pursuant to § 90.129(o).
(h) Exercises or circuits tests which require use of these frequencies for more than seven hours per week cumulative are prohibited unless prior written approval is obtained from the Commission.
[48 FR 32996, July 20, 1983, as amended at 49 FR 48712, Dec. 14, 1984; 52 FR 29856, Aug. 12, 1987; 62 FR 18929, Apr. 17, 1997]
(a) The following frequencies between 450-470 MHz are designated for low-power use subject to the provisions of this section. For purposes of this section these frequencies are referred to as “low power frequencies.” Pairs are shown but single frequencies are available for simplex operations.
(b) Group A1 Frequencies. The Industrial/Business Pool frequencies in Group A1 are available on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b), as follows:
(1) Group A1 frequencies are available for voice and non-voice operations on a co-primary basis. Base, mobile and operational fixed stations will be authorized on Group A1 frequencies. Fixed stations may be licensed as mobile.
(2) Within 80 kilometers (50 miles) of the specified coordinates of the top 100 urban areas listed in § 90.741 of this chapter (“80 km circles”) only low power operation will be authorized. The coordinates of an operational fixed or base station and the geographic center (latitude and longitude) of a mobile area of operation determine whether a station is within an “80 km circle.”
(i) The maximum ERP for low power operation on Group A1 frequencies is as follows:
| Operation | Low side of frequency pair (watts) | High side of frequency pair (watts) |
|---|---|---|
| Operational Fixed or Base | 20 | 6 |
| Mobile | 6 | 6 |
| Portable | 2 | 2 |
(ii) The maximum antenna height for low power fixed stations on Group A1 frequencies will be 23 meters (75 feet) above ground.
(3) Outside the “80 km circles” defined in paragraph (b)(2), full-power operational fixed, base, or mobile stations will be authorized as follows:
(i) Power and antenna height limits are governed by § 90.205 of this chapter;
(ii) For any operational fixed, base or mobile station exceeding the low power or antenna height limits listed in paragraph (b)(2), the 21 dBu F(50,10) contour may not overlap any portion of an “80 km circle;” and,
(iii) Wide area operations will not be permitted. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographic center (latitude and longitude).
(4) The Industrial/Business Pool Group A1 Low Power Frequencies are as follows:
| 451/456.18125 | 451/456.58125 | 452/457.10625 | 452/457.70625 |
| 451/456.1875 | 451/456.5875 | 452/457.1125 | 452/457.7125 |
| 451/456.19375 | 451/456.59375 | 452/457.11875 | 452/457.71875 |
| 451/456.28125 | 451/456.60625 | 452/457.13125 | 452/457.78125 |
| 451/456.2875 | 451/456.6125 | 452/457.1375 | 452/457.7875 |
| 451/456.29375 | 451/456.61875 | 452/457.14375 | 452/457.79375 |
| 451/456.30625 | 451/456.65625 | 452/457.15625 | 452/457.80625 |
| 451/456.3125 | 451/456.6625 | 452/457.1625 | 452/457.8125 |
| 451/456.31875 | 451/456.66875 | 452/457.16875 | 452/457.81875 |
| 451/456.35625 | 451/456.68125 | 452/457.18125 | 452/457.83125 |
| 451/456.3625 | 451/456.6875 | 452/457.1875 | 452/457.8375 |
| 451/456.36875 | 451/456.69375 | 452/457.19375 | 452/457.84375 |
| 451/456.38125 | 451/456.70625 | 452/457.28125 | 452/457.88125 |
| 451/456.3875 | 451/456.7125 | 452/457.2875 | 452/457.8875 |
| 451/456.39375 | 451/456.71875 | 452/457.29375 | 452/457.89375 |
| 451/456.40625 | 451/456.73125 | 452/457.48125 | 452/457.98125 |
| 451/456.4125 | 451/456.7375 | 452/457.4875 | 452/457.9875 |
| 451/456.41875 | 451/456.74375 | 452/457.49375 | 452/457.99375 |
| 451/456.45625 | 451/456.75625 | 452.53125 (unpaired) | 462/467.18125 |
| 451/456.4625 | 451/456.7625 | 452.5375 (unpaired) | 462/467.1875 |
| 451/456.46875 | 451/456.76875 | 452.54375 (unpaired) | 462/467.19375 |
| 451/456.48125 | 452/457.03125 | 452/457.63125 | 462/467.45625 |
| 451/456.4875 | 452/457.0375 | 452/457.6375 | 462/467.4625 |
| 451/456.49375 | 452/457.04375 | 452/457.64375 | 462/467.46875 |
| 451/456.50625 | 452/457.05625 | 452/457.65625 | 462/467.48125 |
| 451/456.5125 | 452/457.0625 | 452/457.6625 | 462/467.4875 |
| 451/456.51875 | 452/457.06875 | 452/457.66875 | 462/467.49375 |
| 451/456.55625 | 452/457.08125 | 452/457.68125 | 462/467.50625 |
| 451/456.5625 | 452/457.0875 | 452/457.6875 | 462/467.5125 |
| 451/456.56875 | 452/457.09375 | 452/457.69375 | 462/467.51875 |
(c) Group A2 Frequencies. The Industrial/Business Pool frequencies in Group A2 are available nationwide on a coordinated basis, pursuant §§ 90.35(b)(2) and 90.175(b) as follows:
(1) Group A2 frequencies are available for voice and non-voice operations on a co-primary basis. Base, mobile or operational fixed stations will be authorized on Group A2 frequencies. Fixed stations may be licensed as mobile.
(2) Low power operation will be authorized nationwide on Group A2 frequencies.
(i) The maximum ERP for low power operation on these frequencies is as follows:
| Operation | Low side of frequency pair | High side of frequency pair (watts) |
|---|---|---|
| Operational Fixed or Base | 20 | 6 |
| Mobile | 6 | 6 |
| Portable | 2 | 2 |
(ii) The maximum antenna height for low power fixed stations will be 23 meters (75 feet) above ground.
(3) The Industrial/Business Pool Group A2 Low Power Frequencies are as follows:
| 451/456.23125 | 451/456.53125 | 452/457.40625 | 452/457.85625 |
| 451/456.2375 | 451/456.5375 | 452/457.4125 | 452/457.8625 |
| 451/456.24375 | 451/456.54375 | 452/457.41875 | 452/457.86875 |
| 451/456.33125 | 451/456.63125 | 452/457.50625 | |
| 451/456.3375 | 451/456.6375 | 452/457.5125 | |
| 451/456.34375 | 451/456.64375 | 452/457.51875 | |
| 451/456.43125 | 452/457.30625 | 452/457.75625 | |
| 451/456.4375 | 452/457.3125 | 452/457.7625 | |
| 451/456.44375 | 452/457.31875 | 452/457.76875 |
(d) Group B Frequencies. The Industrial/Business Pool frequencies in Group B are available nationwide on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b) as follows:
(1) Group B frequencies are available for non-voice operations on a primary basis. Voice operations will be permitted on a secondary basis. Base, mobile or operational fixed stations will be authorized on Group B frequencies. Fixed stations may be licensed as mobile.
(2) Operation on these frequencies is limited to 6 watts ERP for base, mobile or operational fixed stations and 2 watts ERP for portable units. A maximum antenna height of 7 meters (20 ft) above ground is authorized for fixed stations.
(3) The Industrial/Business Pool Group B Frequencies are as follows:
| 462/467.20625 | 462/467.28125 | 462/467.35625 | 462/467.43125 |
| 462/467.2125 | 462/467.2875 | 462/467.3625 | 462/467.4375 |
| 462/467.21875 | 462/467.29375 | 462/467.36875 | 462/467.44375 |
| 462/467.23125 | 462/467.30625 | 462/467.38125 | |
| 462/467.2375 | 462/467.3125 | 462/467.3875 | |
| 462/467.24375 | 462/467.31875 | 462/467.39375 | |
| 462/467.25625 | 462/467.33125 | 462/467.40625 | |
| 462/467.2625 | 462/467.3375 | 462/467.4125 | |
| 462/467.26875 | 462/467.34375 | 462/467.41875 |
(e) Group C Frequencies. The Industrial/Business Pool frequencies in Group C are available nationwide for non-coordinated itinerant use as follows.
(1) Group C frequencies are available for voice and non-voice operations on a co-primary basis. Only mobile operations will be authorized on Group C frequencies. Stations may operate at fixed locations for a temporary period of time. No stations operating at a permanent fixed location will be authorized on Group C frequencies.
(2) Operation on these frequencies is limited to 6 watts effective radiated power for fixed or mobile units and 2 watts ERP for portable units. Stations operating at fixed locations for a temporary period of time will be limited to an antenna height of 7 meters (20 feet) above ground.
(3) The Industrial/Business Pool Group C Low Power Frequencies are as follows:
| 461/466.03125 | 461/466.15625 | 461/466.28125 | 462.8125 |
| 461/466.0375 | 461/466.1625 | 461/466.2875 | 462.8375 (unpaired) |
| 461/466.04375 | 461/466.16875 | 461/466.29375 | 462/467.8625 |
| 461/466.05625 | 461/466.18125 | 461/466.30625 | 462/467.8875 |
| 461/466.0625 | 461/466.1875 | 461/466.3125 | 462/467.9125 |
| 461/466.06875 | 461/466.19375 | 461/466.31875 | 464/469.48125 |
| 461/466.08125 | 461/466.20625 | 461/466.33125 | 464/469.4875 |
| 461/466.0875 | 461/466.2125 | 461/466.3375 | 464/469.5125 |
| 461/466.09375 | 461/466.21875 | 461/466.34375 | 464/469.51875 |
| 461/466.10625 | 461/466.23125 | 461/466.35625 | 464/469.53125 |
| 461/466.1125 | 461/466.2375 | 461/466.3625 | 464/469.5375 |
| 461/466.11875 | 461/466.24375 | 461/466.36875 | 464/469.5625 |
| 461/466.13125 | 461/466.25625 | 462.7625 (unpaired) | 464/469.56875 |
| 461/466.1375 | 461/466.2625 | 462.7875 (unpaired) | |
| 461/466.14375 | 461/466.26875 | 462.8125 (unpaired) |
(f) Group D Frequencies. The Industrial/Business Pool frequencies in Group D are available on a coordinated basis, pursuant to §§ 90.35(b)(2) and 90.175(b). Central station alarm signaling on these frequencies are co-primary with regard to co-channel or adjacent channel base, mobile or data operations.
(1) Base, mobile or operational fixed stations will be authorized on Group D frequencies. Fixed stations may be licensed as mobile.
(2) Unless concurrence is obtained in accordance with section 90.175(b) of this chapter from the Commission-certified frequency coordinator for frequencies designated for central station alarm operations, Group D frequencies subject to § 90.35(c)(63) are limited to central station alarm use within the urban areas described in § 90.35(c)(63). Outside the urban areas described in § 90.35(c)(63), Group D frequencies subject to § 90.35(c)(63) are available for general Industrial/Business use on a coordinated basis, pursuant to § 90.35(b)(2) and § 90.175(b).
(3) Unless concurrence is obtained in accordance with section 90.175(b) of this chapter from the Commission-certified frequency coordinator for frequencies designated for central station alarm operations, Group D frequencies subject to § 90.35(c)(66) are limited to central station alarm use nationwide.
(4) Operation on Group D frequencies is limited to 2 watts output power for mobile, base or operational fixed stations. Fixed stations used for central station alarm operations may utilize antennas mounted not more than 7 meters (20 feet) above a man-made supporting structure, including antenna structure.
(5) The Industrial/Business Pool Group D Low Power Frequencies are as follows:
| 460/465.90625 | 460/465.95625 | 461/466.00625 |
| 460/465.9125 | 460/465.9625 | 461/466.0125 |
| 460/466.91875 | 460/465.96875 | 461/466.01875 |
| 460/465.93125 | 460/465.98125 | |
| 460/465.9375 | 460/465.9875 | |
| 460/465.94375 | 460/465.99375 |
(g) Low Power Public Safety Frequencies. The frequencies in the Public Safety Pool Low Power Group are available nationwide on a coordinated basis, pursuant to §§ 90.20(c)(2) and 90.175(b).
(1) Base, mobile or operational fixed stations will be authorized on Public Safety Low Power frequencies. Fixed stations may be licensed as mobile.
(2) Operation on these frequencies is limited to 6 watts effective radiated power for base, mobile or operational fixed stations and 2 watts ERP for portable units. A maximum antenna height of 7 meters (20 feet) above ground is authorized for fixed stations.
(3) The Public Safety Pool Low Power Frequencies are as follows:
| 453/458.03125 | 453/458.13125 | 453/458.95625 | 460/465.53125 |
| 453/458.0375 | 453/458.1375 | 453/458.9625 | 460/465.5375 |
| 453/458.04375 | 453/458.14375 | 453/458.96875 | 460/465.54375 |
| 453/458.05625 | 453/458.88125 | 453/458.98125 | 460/465.55625 |
| 453/458.0625 | 453/458.8875 | 453/458.9875 | 460/465.5625 |
| 453/458.06875 | 453/458.89375 | 453/458.99375 | 460/465.56875 |
| 453/458.08125 | 453/458.90625 | 460/465.48125 | |
| 453/458.0875 | 453/458.9125 | 460/465.4875 | |
| 453/458.09375 | 453/458.91875 | 460/465.49375 | |
| 453/458.10625 | 453/458.93125 | 460/465.50625 | |
| 453/458.1125 | 453/458.9375 | 460/465.5125 | |
| 453/458.11875 | 453/458.94375 | 460/465.51875 |
(h) Unless otherwise noted, the following conditions apply to all low power frequencies:
(1) Except for itinerant operations on Group C, wide area operations will not be authorized. The area of normal day-to-day operations will be described in the application in terms of maximum distance from a geographic center (latitude and longitude).
(2) A hospital or health care institution holding a license to operate a radio station under this part may operate a medical radio telemetry device with an output power not to exceed 20 milliwatts without specific authorization from the Commission. All licensees operating under this authority must comply with the requirements and limitations set forth in this section.
(3) No limit shall be placed on the length or height above ground level of any commercially manufactured radiating transmission line when the transmission line is terminated in a non-radiating load and is routed at least 7 meters (20 feet) interior to the edge of any structure or is routed below ground level.
(4) Sea-based stations may utilize antennas mounted not more than 7 meters (20 feet) above a man-made supporting structure, including antenna structures.
(5) Continuous carrier operations are prohibited on these frequencies.
(6) Unless specified elsewhere in this part, licensees as of August 5, 1999, licensed for operations with an emission designator wider than 11.25 kHz on low power frequencies that are subject to an authorized bandwidth of 11.25 kHz, may obtain primary status with respect to co-channel licensees by supplying their coordinates to the Commission. These licensees will continue to operate on a secondary basis with respect to adjacent channel licensees. Additionally, these licensees may continue to operate with an authorized bandwidth wider than 11.25 kHz on such low power frequencies, subject to the provisions of § 90.209(b) of this chapter.
(7) Unless specified elsewhere in this part, licensees as of August 5, 1999, licensed for operations with an emission designator wider than 11.25 kHz on frequencies that are subject to an authorized bandwidth of 11.25 kHz, which are not low power frequencies, may obtain primary status with respect to co-channel licensees by modifying their license to low power frequencies, supplying their coordinates to the Commission, and otherwise complying with the conditions of paragraphs (b) through (g) of this section. These licensees will continue to operate on a secondary basis with respect to adjacent channel licensees. Additionally, these licensees may continue to operate with an authorized bandwidth wider than 11.25 kHz on such low power frequencies, subject to the provisions of § 90.209(b) of this chapter.
(8) Applicants proposing to operate with an authorized bandwidth wider than 11.25 kHz, on low power frequencies that are subject to an authorized bandwidth of 11.25 kHz, may be licensed on a secondary, non-interference basis. Such applicants are subject to the conditions of paragraphs (b) through (g) of this section and the provisions of § 90.209(b) of this chapter.
[68 FR 19461, Apr. 21, 2003; 68 FR 55319, Sept. 25, 2003, as amended at 69 FR 4254, Jan. 29, 2004; 75 FR 19284, Apr. 14, 2010; 83 FR 61097, Nov. 27, 2018]
(a) Frequencies subject to § 90.20(d)(22) may be used for the operation of self-powered vehicle detectors by licensees of base/mobile stations in the Public Safety Pool in accordance with the following conditions:
(1) All stations are limited to 100 milliwatts carrier power and 20K00F7W, 20K00F7X, 20K00F8W, 20K00F8X, 20K00F9W or 20K00F9X emissions. The frequency deviation shall not exceed 5 kHz. No more than two 30 ms. pulses may be emitted for each vehicle sensed.
(2) The transmitters must be crystal controlled with a frequency tolerance of plus or minus .005% from −20° to plus 50 °C. They must be certificated.
(3) The total length of the transmission line plus antenna may not exceed one-half wavelength and must be integral with the unit.
(4) All operation shall be on a secondary, non-interference basis.
(b) [Reserved]
[48 FR 54982, Dec. 8, 1983, as amended at 54 FR 38681, Sept. 20, 1989; 62 FR 18929, Apr. 17, 1997; 63 FR 36610, July 7, 1998]
The frequency bands 422.1875-425.4875 MHz and 427.1875-429.9875 MHz are available for use in the Detroit, Michigan and Cleveland, Ohio areas. The bands 423.8125-425.4875 MHz and 428.8125-429.9875 MHz are available for use in the Buffalo, New York area. Sections 90.273 through 90.281 address the specific rules applicable to these bands. Use of these bands is also subject to the general technical standards and application procedures contained in other subparts of part 90. The technical standards applicable in this band are the same as those contained in subpart I of part 90 for the 450-470 MHz band. Private land mobile use of these frequencies is subject to accepting any interference from Federal Government radiolocation operations.
(a) The following tables list frequencies available for assignment in the Public Safety and Industrial/Business Pools as indicated. In the tables, the Public Safety Pool frequencies are denoted as “PS” and the Industrial/Business Pool frequencies are denoted as “IB.” The frequencies 422.19375 MHz through 424.99375 MHz are paired with frequencies 427.19375 MHz through 429.99375 MHz, respectively. Only the lower half of each frequency pair, available for base station operation, is listed in the tables. Corresponding mobile and control station frequencies are 5 MHz higher than the base station frequency. The frequencies 425.000 through 425.48125 are unpaired and are available for either single frequency dispatch or paging operations.
| Frequency (MHz) | Pool in which assigned |
|---|---|
| Paired channels: | |
| 422.19375 * | IB |
| 422.200 | IB |
| 422.20625 * | IB |
| 422.21250 | IB |
| 422.21875 * | IB |
| 422.225 | IB |
| 422.23125 * | IB |
| 422.23750 | IB |
| 422.24375 * | IB |
| 422.250 | IB |
| 422.25625 * | IB |
| 422.26250 | IB |
| 422.26875 * | IB |
| 422.275 | IB |
| 422.28125 * | IB |
| 422.28750 | IB |
| 422.29375 * | IB |
| 422.300 | IB |
| 422.30625 * | IB |
| 422.31250 | IB |
| 422.31875 * | IB |
| 422.325 | IB |
| 422.33125 * | IB |
| 422.33750 | IB |
| 422.34375 * | IB |
| 422.350 | IB |
| 422.35625 * | IB |
| 422.36250 | IB |
| 422.36875 * | IB |
| 422.375 | IB |
| 422.38125 * | IB |
| 422.38750 | IB |
| 422.39375 * | IB |
| 422.400 | IB |
| 422.40625 * | IB |
| 422.41250 | IB |
| 422.41875 * | IB |
| 422.425 | IB |
| 422.43125 * | IB |
| 422.43750 | IB |
| 422.44375 * | IB |
| 422.450 | IB |
| 422.45625 * | IB |
| 422.46250 | IB |
| 422.46875 * | IB |
| 422.475 | IB |
| 422.48125 * | IB |
| 422.48750 | IB |
| 422.49375 * | IB |
| 422.500 | IB |
| 422.50625 * | IB |
| 422.51250 | IB |
| 422.51875 * | IB |
| 422.525 | IB |
| 422.53125 * | IB |
| 422.53750 | IB |
| 422.54375 * | IB |
| 422.550 | IB |
| 422.55625 * | IB |
| 422.56250 | IB |
| 422.56875 * | IB |
| 422.575 | IB |
| 422.58125 * | IB |
| 422.58750 | IB |
| 422.59375 * | IB |
| 422.600 | IB |
| 422.60625 * | IB |
| 422.61250 | IB |
| 422.61875 * | IB |
| 422.625 | IB |
| 422.63125 * | IB |
| 422.63750 | IB |
| 422.64375 * | IB |
| 422.650 | IB |
| 422.65625 * | IB |
| 422.66250 | IB |
| 422.66875 * | IB |
| 422.675 | IB |
| 422.68125 * | IB |
| 422.68750 | IB |
| 422.69375 * | IB |
| 422.700 | IB |
| 422.70625 * | IB |
| 422.71250 | IB |
| 422.71875 * | IB |
| 422.725 | IB |
| 422.73125 * | IB |
| 422.73750 | IB |
| 422.74375 * | IB |
| 422.750 | IB |
| 422.75625 * | IB |
| 422.76250 | IB |
| 422.76875 * | IB |
| 422.775 | IB |
| 422.78125 * | IB |
| 422.78750 | IB |
| 422.79375 * | IB |
| 422.800 | IB |
| 422.80625 * | IB |
| 422.81250 | IB |
| 422.81875 * | IB |
| 422.825 | IB |
| 422.83125 * | IB |
| 422.83750 | IB |
| 422.84375 * | IB |
| 422.850 | IB |
| 422.85625 * | IB |
| 422.86250 | IB |
| 422.86875 * | IB |
| 422.875 | IB |
| 422.88125 * | IB |
| 422.88750 | IB |
| 422.89375 * | IB |
| 422.900 | IB |
| 422.90625 * | IB |
| 422.91250 | IB |
| 422.91875 * | IB |
| 422.925 | IB |
| 422.93125 * | IB |
| 422.93750 | IB |
| 422.94375 * | IB |
| 422.950 | IB |
| 422.95625 * | IB |
| 422.96250 | IB |
| 422.96875 * | IB |
| 422.975 | IB |
| 422.98125 * | IB |
| 422.98750 | IB |
| 422.99375 * | IB |
| 423.000 | PS |
| 423.00625 * | PS |
| 423.01250 | PS |
| 423.01875 * | PS |
| 423.025 | PS |
| 423.03125 * | PS |
| 423.03750 | PS |
| 423.04375 * | PS |
| 423.050 | PS |
| 423.05625 * | PS |
| 423.06250 | PS |
| 423.06875 * | PS |
| 423.075 | PS |
| 423.08125 * | PS |
| 423.08750 | PS |
| 423.09375 * | PS |
| 423.100 | PS |
| 423.10625 * | PS |
| 423.11250 | PS |
| 423.11875 * | PS |
| 423.125 | PS |
| 423.13125 * | PS |
| 423.13750 | PS |
| 423.14375 * | PS |
| 423.150 | PS |
| 423.15625 * | PS |
| 423.16250 | PS |
| 423.16875 * | PS |
| 423.175 | PS |
| 423.18125 * | PS |
| 423.18750 | PS |
| 423.19375 * | PS |
| 423.200 | PS |
| 423.20625 * | PS |
| 423.21250 | PS |
| 423.21875 * | PS |
| 423.225 | PS |
| 423.23125 * | PS |
| 423.23750 | PS |
| 423.24375 * | PS |
| 423.250 | PS |
| 423.25625 * | PS |
| 423.26250 | PS |
| 423.26875 * | PS |
| 423.275 | PS |
| 423.28125 * | PS |
| 423.28750 | PS |
| 423.29375 * | PS |
| 423.300 | PS |
| 423.30625 * | PS |
| 423.31250 | PS |
| 423.31875 * | PS |
| 423.325 | PS |
| 423.33125 * | PS |
| 423.33750 | PS |
| 423.34375 * | PS |
| 423.350 | PS |
| 423.35625 * | PS |
| 423.36250 | PS |
| 423.36875 * | PS |
| 423.375 | PS |
| 423.38125 * | PS |
| 423.38750 | PS |
| 423.39375 * | PS |
| 423.400 | PS |
| 423.40625 * | PS |
| 423.41250 | PS |
| 423.41875 * | PS |
| 423.425 | PS |
| 423.43125 * | PS |
| 423.43750 | PS |
| 423.44375 * | PS |
| 423.450 | PS |
| 423.45625 * | PS |
| 423.46250 | PS |
| 423.46875 * | PS |
| 423.475 | PS |
| 423.48125 * | PS |
| 423.48750 | PS |
| 423.49375 * | PS |
| 423.500 | PS |
| 423.50625 * | PS |
| 423.51250 | PS |
| 423.51875 * | PS |
| 423.525 | PS |
| 423.53125 * | PS |
| 423.53750 | PS |
| 423.54375 * | PS |
| 423.550 | PS |
| 423.55625 * | PS |
| 423.56250 | PS |
| 423.56875 * | PS |
| 423.575 | PS |
| 423.58125 * | PS |
| 423.58750 | PS |
| 423.59375 * | PS |
| 423.600 | PS |
| 423.60625 * | PS |
| 423.61250 | PS |
| 423.61875 * | PS |
| 423.625 | PS |
| 423.63125 * | PS |
| 423.63750 | PS |
| 423.64375 * | PS |
| 423.650 | PS |
| 423.65625 * | PS |
| 423.66250 | PS |
| 423.66875 * | PS |
| 423.675 | PS |
| 423.68125 * | PS |
| 423.68750 | PS |
| 423.69375 * | PS |
| 423.700 | PS |
| 423.70625 * | PS |
| 423.71250 | PS |
| 423.71875 * | PS |
| 423.725 | PS |
| 423.73125 * | PS |
| 423.73750 | PS |
| 423.74375 * | PS |
| 423.750 | PS |
| 423.75625 * | PS |
| 423.76250 | PS |
| 423.76875 * | PS |
| 423.775 | PS |
| 423.78125 * | PS |
| 423.78750 | PS |
| 423.79375 * | PS |
| 423.800 | PS |
| 423.80625 * | PS |
| * This frequency will be assigned with an authorized bandwidth not to exceed 6 kHz. | |
| Frequency (MHz) | Pool in which assigned |
|---|---|
| Paired channels: | |
| 423.81875 * | PS |
| 423.825 | PS |
| 423.83125 * | PS |
| 423.83750 | PS |
| 423.84375 * | PS |
| 423.850 | PS |
| 423.85625 * | PS |
| 423.86250 | PS |
| 423.86875 * | PS |
| 423.875 | PS |
| 423.88125 * | PS |
| 423.88750 | PS |
| 423.89375 * | PS |
| 423.900 | PS |
| 423.90625 * | PS |
| 423.91250 | PS |
| 423.91875 * | PS |
| 423.925 | PS |
| 423.93125 * | PS |
| 423.93750 | PS |
| 423.94375 * | PS |
| 423.950 | PS |
| 423.95625 * | PS |
| 423.96250 | PS |
| 423.96875 * | PS |
| 423.975 | PS |
| 423.98125 * | PS |
| 423.98750 | PS |
| 423.99375 * | PS |
| 424.000 | PS |
| 424.00625 * | PS |
| 424.01250 | PS |
| 424.01875 * | PS |
| 424.025 | PS |
| 424.03125 * | PS |
| 424.03750 | PS |
| 424.04375 * | PS |
| 424.050 | PS |
| 424.05625 * | PS |
| 424.06250 | PS |
| 424.06875 * | PS |
| 424.075 | PS |
| 424.08125 * | PS |
| 424.08750 | PS |
| 424.09375 * | PS |
| 424.100 | PS |
| 424.10625 * | PS |
| 424.11250 | PS |
| 424.11875 * | PS |
| 424.125 | PS |
| 424.13125 * | PS |
| 424.13750 | PS |
| 424.14375 * | PS |
| 424.150 | PS |
| 424.15625 * | PS |
| 424.16250 | PS |
| 424.16875 * | PS |
| 424.175 | PS |
| 424.18125 * | PS |
| 424.18750 | PS |
| 424.19375 * | PS |
| 424.200 | PS |
| 424.20625 * | PS |
| 424.21250 | PS |
| 424.21875 * | PS |
| 424.225 | PS |
| 424.23125 * | PS |
| 424.23750 | PS |
| 424.24375 * | PS |
| 424.250 | PS |
| 424.25625 * | PS |
| 424.26250 | PS |
| 424.26875 * | PS |
| 424.275 | PS |
| 424.28125 * | PS |
| 424.28750 | PS |
| 424.29375 * | PS |
| 424.300 | PS |
| 424.30625 * | PS |
| 424.31250 | PS |
| 424.31875 * | PS |
| 424.325 | PS |
| 424.33125 * | PS |
| 424.33750 | PS |
| 424.34375 * | PS |
| 424.350 | PS |
| 424.35625 * | PS |
| 424.36250 | PS |
| 424.36875 * | PS |
| 424.375 | PS |
| 424.38125 * | PS |
| 424.38750 | PS |
| 424.39375 * | PS |
| 424.400 | IB |
| 424.40625 * | IB |
| 424.41250 | IB |
| 424.41875 * | IB |
| 424.425 | IB |
| 424.43125 * | IB |
| 424.43750 | IB |
| 424.44375 * | IB |
| 424.450 | IB |
| 424.45625 * | IB |
| 424.46250 | IB |
| 424.46875 * | IB |
| 424.475 | IB |
| 424.48125 * | IB |
| 424.48750 | IB |
| 424.49375 * | IB |
| 424.500 | IB |
| 424.50625 * | IB |
| 424.51250 | IB |
| 424.51875 * | IB |
| 424.525 | IB |
| 424.53125 * | IB |
| 424.53750 | IB |
| 424.54375 * | IB |
| 424.550 | IB |
| 424.55625 * | IB |
| 424.56250 | IB |
| 424.56875 * | IB |
| 424.575 | IB |
| 424.58125 * | IB |
| 424.58750 | IB |
| 424.59375 * | IB |
| 424.600 | IB |
| 424.60625 * | IB |
| 424.61250 | IB |
| 424.61875 * | IB |
| 424.625 | IB |
| 424.63125 * | IB |
| 424.63750 | IB |
| 424.64375 * | IB |
| 424.650 | IB |
| 424.65625 * | IB |
| 424.66250 | IB |
| 424.66875 * | IB |
| 424.675 | IB |
| 424.68125 * | IB |
| 424.68750 | IB |
| 424.69375 * | IB |
| 424.700 | IB |
| 424.70625 * | IB |
| 424.71250 | IB |
| 424.71875 * | IB |
| 424.725 | IB |
| 424.73125 * | IB |
| 424.73750 | IB |
| 424.74375 * | IB |
| 424.750 | IB |
| 424.75625 * | IB |
| 424.76250 | IB |
| 424.76875 * | IB |
| 424.775 | IB |
| 424.78125 * | IB |
| 424.78750 | IB |
| 424.79375 * | IB |
| 424.800 | IB |
| 424.80625 * | IB |
| 424.81250 | IB |
| 424.81875 * | IB |
| 424.825 | IB |
| 424.83125 * | IB |
| 424.83750 | IB |
| 424.84375 * | IB |
| 424.850 | IB |
| 424.85625 * | IB |
| 424.86250 | IB |
| 424.86875 * | IB |
| 424.875 | IB |
| 424.88125 * | IB |
| 424.88750 | IB |
| 424.89375 * | IB |
| 424.900 | IB |
| 424.90625 * | IB |
| 424.91250 | IB |
| 424.91875 * | IB |
| 424.925 | IB |
| 424.93125 * | IB |
| 424.93750 | IB |
| 424.94375 * | IB |
| 424.950 | IB |
| 424.95625 * | IB |
| 424.96250 | IB |
| 424.96875 * | IB |
| 424.975 | IB |
| 424.98125 * | IB |
| 424.98750 | IB |
| 424.99375 * | IB |
| Single channels: | |
| 425.000 | IB |
| 425.00625 * | IB |
| 425.01250 | IB |
| 425.01875 * | IB |
| 425.025 | IB |
| 425.03125 * | IB |
| 425.03750 | IB |
| 425.04375 * | IB |
| 425.050 | IB |
| 425.05625 * | IB |
| 425.06250 | IB |
| 425.06875 * | IB |
| 425.075 | IB |
| 425.08125 * | IB |
| 425.08750 | IB |
| 425.09375 * | IB |
| 425.100 | IB |
| 425.10625 * | IB |
| 425.11250 | IB |
| 425.11875 * | IB |
| 425.125 | IB |
| 425.13125 * | IB |
| 425.13750 | IB |
| 425.14375 * | IB |
| 425.150 | IB |
| 425.15625 * | IB |
| 425.16250 | IB |
| 425.16875 * | IB |
| 425.175 | IB |
| 425.18125 * | IB |
| 425.18750 | IB |
| 425.19375 * | IB |
| 425.200 | IB |
| 425.20625 * | IB |
| 425.21250 | IB |
| 425.21875 * | IB |
| 425.225 | IB |
| 425.23125 * | IB |
| 425.23750 | IB |
| 425.24375 * | IB |
| 425.250 | PS |
| 425.25625 * | PS |
| 425.26250 | PS |
| 425.26875 * | PS |
| 425.275 | PS |
| 425.28125 * | PS |
| 425.28750 | PS |
| 425.29375 * | PS |
| 425.300 | PS |
| 425.30625 * | PS |
| 425.31250 | PS |
| 425.31875 * | PS |
| 425.325 | PS |
| 425.33125 * | PS |
| 425.33750 | PS |
| 425.34375 * | PS |
| 425.350 | PS |
| 425.35625 * | PS |
| 425.36250 | PS |
| 425.36875 * | PS |
| 425.375 | PS |
| 425.38125 * | PS |
| 425.38750 | PS |
| 425.39375 * | PS |
| 425.400 | PS |
| 425.40625 * | PS |
| 425.41250 | PS |
| 425.41875 * | PS |
| 425.425 | PS |
| 425.43125 * | PS |
| 425.43750 | PS |
| 425.44375 * | PS |
| 425.450 | PS |
| 425.45625 * | PS |
| 425.46250 | PS |
| 425.46875 * | PS |
| 425.475 | PS |
| 425.48125 * | PS |
| * This frequency will be assigned with an authorized bandwidth not to exceed 6 kHz. | |
(b) [Reserved]
(c) Base or control stations shall be located within 48 km (30 miles) of the center of Buffalo or 80 km (50 miles) of the center of Detroit. In Cleveland, base or control stations will be allowed at locations north of line A that are within 48 km (30 miles) of the city center. In addition, low power (2 watts or less) base stations may locate within 80 km (50 miles) of the center of Buffalo. The following coordinates shall be used for the centers of these areas (coordinates are referenced to North American Datum 1983 (NAD83)):
| Buffalo, NY | 42°52′52.2″ North latitude. 78°52′20.1″ West longitude. |
| Cleveland, OH | 41°29′51.2″ North latitude. 81°41′49.5″ West longitude. |
| Detroit, MI | 42°19′48.1″ North latitude. 83°02′56.7″ West longitude. |
(d) Mobile operation shall be confined to within 80 km (50 miles) of the centers of Detroit, Cleveland, or Buffalo.
[52 FR 6156, Mar. 2, 1987, as amended at 54 FR 38681, Sept. 20, 1989; 58 FR 31476, June 3, 1993; 58 FR 44957, Aug. 25, 1993; 60 FR 37269, July 19, 1995; 61 FR 6576, Feb. 21, 1996; 62 FR 18929, Apr. 17, 1997; 63 FR 68965, Dec. 14, 1998]
(a) Base station authorizations in the 421-430 MHz band will be subject to Effective Radiated Power (ERP) and Effective Antenna Height (EAH) limitations as shown in the table below. ERP is defined as the product of the power supplied to the antenna and its gain relative to a half-wave dipole in a given direction. EAH is calculated by subtracting the Assumed Average Terrain Elevation (AATE) as listed in table 7 of § 90.619 from the antenna height above mean sea level.
| Effective antenna height (EAH) in meters (feet) | Maximum effective radiated power (ERP) (watts) |
|---|---|
| 0-152 (0-500) | 250 |
| Above 152-305 (above 500-1000) | 150 |
| Above 305-457 (above 1000-1500) | 75 |
| Above 457-610 (above 1500-2000) | 40 |
| Above 610-762 (above 2000-2500) | 20 |
| Above 762-914 (above 2500-3000) | 15 |
| Above 914-1219 (above 3000-4000) | 10 |
| Above 1219 (above 4000) | 5 |
(b) The maximum transmitter power output that will be authorized for control stations is 20 watts.
[52 FR 6157, Mar. 2, 1987, as amended at 58 FR 44957, Aug. 25, 1993]
(a) Except for control stations, operational fixed facilities will not be authorized in the 421-430 MHz band. This does not preclude secondary fixed tone signaling and alarm operations authorized in § 90.235.
(b) Control stations associated with one or more mobile relay stations will be authorized only on the assigned frequency of the associated mobile station. Use of a mobile service frequency by a control station of a mobile relay system is subject to the condition that harmful interference shall not be caused to stations of licensees authorized to use the frequency for mobile service communications.
[52 FR 6158, Mar. 2, 1987, as amended at 54 FR 38681, Sept. 20, 1989]