Goto Section: 90.207 | 90.210 | Table of Contents
FCC 90.209
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 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 Sec. 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 Sec. 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 Sec. 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 ^1320/11.25/6
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 Sec. 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 Sec. 90.259.
(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
Sec. 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 Sec. 90.203(j)(3). See Sec. 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
Sec. 90.175.
[ 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]
Goto Section: 90.207 | 90.210
Goto Year: 2007 |
2009
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