Goto Section: 90.207 | 90.210 | Table of Contents
Revised as of September 18, 2020
Goto Year:2020 |
§ 90.209 Bandwidth limitations.
(a) Each authorization issued to a station licensed under this part
will show an emission designator representing the class of emission
authorized. The designator will be prefixed by a specified necessary
bandwidth. This number does not necessarily indicate the bandwidth
occupied by the emission at any instant. In those cases where § 2.202 of
this chapter does not provide a formula for the computation of
necessary bandwidth, the occupied bandwidth, as defined in part 2 of
this chapter, may be used in lieu of the necessary bandwidth.
(b) The maximum authorized single channel bandwidth of emission
corresponding to the type of emission specified in § 90.207 is as
(1) For A1A or A1B emissions, the maximum authorized bandwidth is 0.25
kHz. The maximum authorized bandwidth for type A3E emission is 8 kHz.
(2) For operations below 25 MHz utilizing J3E emission, the bandwidth
occupied by the emission shall not exceed 3000 Hz. The assigned
frequency will be specified in the authorization. The authorized
carrier frequency will be 1400 Hz lower in frequency than the assigned
frequency. Only upper sideband emission may be used. In the case of
regularly available double sideband radiotelephone channels, an
assigned frequency for J3E emissions is available either 1600 Hz below
or 1400 Hz above the double sideband radiotelephone assigned frequency.
(3) For all other types of emissions, the maximum authorized bandwidth
shall not be more than that normally authorized for voice operations.
(4) Where a frequency is assigned exclusively to a single licensee,
more than a single emission may be used within the authorized
bandwidth. In such cases, the frequency stability requirements of
§ 90.213 must be met for each emission.
(5) Unless specified elsewhere, channel spacings and bandwidths that
will be authorized in the following frequency bands are given in the
Table 1 to § 90.209(b)(5)—Standard Channel Spacing/Bandwidth
Frequency band (MHz) Channel spacing (kHz) Authorized bandwidth (kHz)
25-50 20 20
72-76 20 20
150-174 ^17.5 ^1 320/11.25/6
216-220^5 6.25 20/11.25/6
220-222 5 4
406-512^2 ^16.25 ^1 3 620/11.25/6
806-809/851-854 12.5 20
809-817/854-862 12.5 ^620/11.25
817-824/862-869 25 ^620
896-901/935-940 12.5 13.6
896-901/935-940^7 12.5 13.6
929-930 25 20
1427-1432^5 12.5 12.5
^1For stations authorized on or after August 18, 1995.
^2Bandwidths for radiolocation stations in the 420-450 MHz band and for
stations operating in bands subject to this footnote will be reviewed
and authorized on a case-by-case basis.
^3Operations using equipment designed to operate with a 25 kHz channel
bandwidth will be authorized a 20 kHz bandwidth. Operations using
equipment designed to operate with a 12.5 kHz channel bandwidth will be
authorized a 11.25 kHz bandwidth. Operations using equipment designed
to operate with a 6.25 kHz channel bandwidth will be authorized a 6 kHz
bandwidth. All stations must operate on channels with a bandwidth of
12.5 kHz or less beginning January 1, 2013, unless the operations meet
the efficiency standard of § 90.203(j)(3).
^4The maximum authorized bandwidth shall be 12 MHz for
non-multilateration LMS operations in the band 909.75-921.75 MHz and 2
MHz in the band 902.00-904.00 MHz. The maximum authorized bandwidth for
multilateration LMS operations shall be 5.75 MHz in the 904.00-909.75
MHz band; 2 MHz in the 919.75-921.75 MHz band; 5.75 MHz in the
921.75-927.25 MHz band and its associated 927.25-927.50 MHz narrowband
forward link; and 8.00 MHz if the 919.75-921.75 MHz and 921.75-927.25
MHz bands and their associated 927.25-927.50 MHz and 927.50-927.75 MHz
narrowband forward links are aggregated.
^5See § 90.259.
^6Operations using equipment designed to operate with a 25 kilohertz
channel bandwidth may be authorized up to a 20 kilohertz bandwidth
unless the equipment meets the Adjacent Channel Power limits of § 90.221
in which case operations may be authorized up to a 22 kilohertz
bandwidth. Operations using equipment designed to operate with a 12.5
kilohertz channel bandwidth may be authorized up to an 11.25 kilohertz
^7900 MHz broadband systems may operate on channels and with bandwidths
pursuant to the rules specified in subpart P of part 27 of this
(6)(i) Beginning January 1, 2011, no new applications for the 150-174
MHz and/or 421-512 MHz bands will be acceptable for filing if the
applicant utilizes channels with an authorized bandwidth exceeding
11.25 kHz, unless specified elsewhere or the operations meet the
efficiency standards of § 90.203(j)(3).
(ii) Beginning January 1, 2011, no modification applications for
stations in the 150-174 MHz and/or 421-512 MHz bands that increase the
station's authorized interference contour, will be acceptable for
filing if the applicant utilizes channels with an authorized bandwidth
exceeding 11.25 kHz, unless specified elsewhere or the operations meet
the efficiency standards of § 90.203(j)(3). See § 90.187(b)(2)(iii) and
(iv) for interference contour designations and calculations.
Applications submitted pursuant to this paragraph must comply with
frequency coordination requirements of § 90.175.
(7) Economic Area (EA)-based licensees in frequencies 817-824/862-869
MHz (813.5-824/858.5-869 MHz in the counties listed in § 90.614(c)) may
exceed the standard channel spacing and authorized bandwidth listed in
paragraph (b)(5) of this section in any National Public Safety Planning
Advisory Committee Region when all 800 MHz public safety licensees in
the Region have completed band reconfiguration consistent with this
part. In any National Public Safety Planning Advisory Committee Region
where the 800 MHz band reconfiguration is incomplete, EA-based
licensees in frequencies 817-821/862-866 MHz (813.5-821/858.5-866 MHz
in the counties listed in § 90.614(c)) may exceed the standard channel
spacing and authorized bandwidth listed in paragraph (b)(5) of this
section. Upon all 800 MHz public safety licensees in a National Public
Safety Planning Advisory Committee Region completing band
reconfiguration, EA-based 800 MHz SMR licensees in the 821-824/866-869
MHz band may exceed the channel spacing and authorized bandwidth in
paragraph (b)(5) of this section. Licensees authorized to exceed the
standard channel spacing and authorized bandwidth under this paragraph
must provide at least 30 days written notice prior to initiating such
service in the bands listed herein to every 800 MHz public safety
licensee with a base station in an affected National Public Safety
Planning Advisory Committee Region, and every 800 MHz public safety
licensee with a base station within 113 kilometers (70 miles) of an
affected National Public Safety Planning Advisory Committee Region.
Such notice shall include the estimated date upon which the EA-based
800 MHz SMR licensee intends to begin operations that exceed the
channel spacing and authorized bandwidth in paragraph (b)(5) of this
(8) Applicants may begin to license 12.5 kilohertz bandwidth channels
in the 809-817/854-862 MHz band segment only after the Wireless
Telecommunications Bureau and the Public Safety and Homeland Security
Bureau jointly release a public notice announcing the availability of
those channels for licensing in a National Public Safety Planning
Advisory Committee region.
[ 60 FR 37263 , July 19, 1995, as amended at 67 FR 41860 , June 20, 2002;
68 FR 42314 , July 17, 2003; 68 FR 54769 , Sept. 18, 2003; 69 FR 39867 ,
July 1, 2004; 69 FR 67837 , Nov. 22, 2004; 70 FR 21661 , Apr. 27, 2005;
70 FR 34693 , June 15, 2005; 72 FR 35194 , June 27, 2007; 73 FR 34201 ,
June 17, 2008; 77 FR 33979 , June 8, 2012; 77 FR 61537 , Oct. 10, 2012;
81 FR 66832 , Sept. 29, 2016; 83 FR 61096 , Nov. 27, 2018; 85 FR 43138 ,
July 15, 2020]
Goto Section: 90.207 | 90.210
Goto Year: 2020 |
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