§ 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 follows:

   (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 following
   table.

   Standard Channel Spacing/Bandwidth
   Frequency band (MHz) Channel spacing (kHz) Authorized bandwidth (kHz)
   Below 25^2                                
   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            ^1 320/11.25/6
   806-809/851-854                       12.5                        20
   809-824/854-869                         25                        20
   896-901/935-940                       12.5                       13.6
   902-928^4                                 
   929-930                                 25                         20
   1427-1432^5                           12.5                      12.5
   ^32450-2483.5^2                           
   Above 2500^2                              

   ^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 kHz channel
   bandwidth may be authorized up to a 22 kHz bandwidth if the equipment meets
   the Adjacent Channel Power limits of § 90.221.

   (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 section.

   [ 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]

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