Bandwidth.

  1. Law
  2. CFR 47
  3. Telecommunication
  4. Federal Communications Commission
  5. Safety and Special Radio Services
  6. Fixed Microwave Services
  7. Technical Standards
  8. Bandwidth.

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§ 101.109 Bandwidth.

(a) Each authorization issued pursuant to these rules will show, as the emission designator, a symbol representing the class of emission which must be prefixed by a number specifying the necessary bandwidth. This figure does not necessarily indicate the bandwidth actually occupied by the emission at any instant. In those cases where part 2 of this chapter does not provide a formula for the computation of the necessary bandwidth, the occupied bandwidth may be used in the emission designator.

(b) Stations in this service will be authorized any type of emission, method of modulation, and transmission characteristic, consistent with efficient use of the spectrum and good engineering practice, except that Type B, damped-wave emission will not be authorized.

(c) The maximum bandwidth which will be authorized per frequency assigned is set out in the table that follows. Regardless of the maximum authorized bandwidth specified for each frequency band, the Commission reserves the right to issue a license for less than the maximum bandwidth if it appears that a lesser bandwidth would be sufficient to support an applicant's intended communications.

Expand Table
Frequency band (MHz) Maximum authorized bandwidth
928 to 929 25 kHz1 5 6
932 to 932.5, 941 to 941.5 12.5 kHz1 5 6
932.5 to 935, 941.5 to 944 200 kHz1
952 to 960 200 KHz1 5 6
1,850 to 1,990 10 MHz1
2,110 to 2,130 3.5 MHz
2,130 to 2,150 800 or 1600 KHz1
2,150 to 2,160 10 MHz
2,160 to 2,180 3.5 MHz
2,180 to 2,200 800 or 1600 KHz1
2,450 to 2,483.5 625 KHz2
2,483.5 to 2,500 800 KHz
3,700 to 4,200 20 MHz
5,925 to 6,425 1 60
6,425 to 6,525 25 MHz
6,525 to 6,875 30 MHz.1
6,875 to 7,125 25 MHz1
10,550 to 10,680 5 MHz1
10,700 to 11,700 1 80
12,200 to 12,7008 500 megahertz
12,700 to 13,150 50 MHz
13,200 to 13,250 25 MHz
17,700 to 18,140 220 MHz1
18,140 to 18,142 2 MHz
18,142 to 18,580 6 MHz
18,580 to 18,820 20 MHz1
18,820 to 18,920 10 MHz
18,920 to 19,160 20 MHz1
19,160 to 19,260 10 MHz
19,260 to 19,700 220 MHz1
21,200 to 23,600 50 MHz1 4
24,250 to 25,250 40 MHz7
29,100 to 29,250 150 MHz
31,000 to 31,075 75 MHz
31,075 to 31,225 150 MHz
31,225 to 31,300 75 MHz
71,000 to 76,000 5000 MHz
81,000 to 86,000 5000 MHz
92,000 to 95,000 (3)

1 The maximum bandwidth that will be authorized for each particular frequency in this band is detailed in the appropriate frequency table in § 101.147. If contiguous channels are aggregated in the 928-928.85/952-952.85/956.25-956.45 MHz, the 928.85-929/959.85-960 MHz, or the 932-932.5/941-941.5 MHz bands, then the bandwidth may exceed that which is listed in the table.

2 1250 KHz, 1875 KHz, or 2500 KHz on a case-by-case basis.

3 To be specified in authorization. For the band 92 to 95 GHz, maximum bandwidth is licensed in one segment of 2 GHz from 92-94 GHz and one 0.9 GHz segment from 94.1 to 95 GHz, or the total of the loaded band if smaller than the assigned bandwidth.

4 For exceptions, see § 101.147(s).

5 A 12.5 kHz bandwidth applies only to frequencies listed in § 101.147(b)(1) through (4).

6 For frequencies listed in § 101.147(b)(1) through (4), consideration will be given on a case-by-case basis to authorizing bandwidths up to 50 kHz.

7 For channel block assignments in the 24,250-25,250 MHz band, the authorized bandwidth is equivalent to an unpaired channel block assignment or to either half of a symmetrical paired channel block assignment. When adjacent channels are aggregated, equipment is permitted to operate over the full channel block aggregation without restriction.

Note to footnote 7: Unwanted emissions shall be suppressed at the aggregate channel block edges based on the same roll-off rate as is specified for a single channel block in § 101.111(a)(1) or in § 101.111(a)(2)(ii) and (iii) as appropriate.

8 For incumbent private operational fixed point-to-point stations in this band (those not licensed as MVDDS), the maximum bandwidth shall be 20 MHz.

[61 FR 26677, May 28, 1996, as amended at 61 FR 44181, Aug. 28, 1996; 62 FR 23167, Apr. 29, 1997; 62 FR 24582, May 6, 1997; 63 FR 6105, Feb. 6, 1998; 65 FR 17449, Apr. 3, 2000; 65 FR 38329, June 20, 2000; 65 FR 59358, Oct. 5, 2000; 67 FR 43038, June 26, 2002; 68 FR 4956, Jan. 31, 2003; 69 FR 3266, Jan. 23, 2004; 70 FR 29997, May 25, 2005; 75 FR 41771, July 19, 2010; 76 FR 59572, Sept. 27, 2011; 77 FR 54432, Sept. 5, 2012; 81 FR 79945, Nov. 14, 2016]


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