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Electronic Code of Federal Regulations

e-CFR data is current as of December 12, 2019

Title 47Chapter ISubchapter DPart 101Subpart C → §101.109


Title 47: Telecommunication
PART 101—FIXED MICROWAVE SERVICES
Subpart C—Technical Standards


§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.

Frequency band (MHz) Maximum authorized bandwidth
928 to 92925 kHz1 5 6
932 to 932.5, 941 to 941.512.5 kHz1 5 6
932.5 to 935, 941.5 to 944200 kHz1
952 to 960200 KHz1 5 6
1,850 to 1,99010 MHz1
2,110 to 2,1303.5 MHz
2,130 to 2,150800 or 1600 KHz1
2,150 to 2,16010 MHz
2,160 to 2,1803.5 MHz
2,180 to 2,200800 or 1600 KHz1
2,450 to 2,483.5625 KHz2
2,483.5 to 2,500800 KHz
3,700 to 4,20020 MHz
5,925 to 6,425160
6,425 to 6,52525 MHz
6,525 to 6,87530 MHz.1
6,875 to 7,12525 MHz1
10,550 to 10,6805 MHz1
10,700 to 11,700180
12,200 to 12,7008500 megahertz
12,700 to 13,15050 MHz
13,200 to 13,25025 MHz
17,700 to 18,140220 MHz1
18,140 to 18,1422 MHz
18,142 to 18,5806 MHz
18,580 to 18,82020 MHz1
18,820 to 18,92010 MHz
18,920 to 19,16020 MHz1
19,160 to 19,26010 MHz
19,260 to 19,700220 MHz1
21,200 to 23,60050 MHz1 4
24,250 to 25,25040 MHz7
29,100 to 29,250150 MHz
31,000 to 31,07575 MHz
31,075 to 31,225150 MHz
31,225 to 31,30075 MHz
71,000 to 76,0005000 MHz
81,000 to 86,0005000 MHz
92,000 to 95,000(3)

1The 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.

21250 KHz, 1875 KHz, or 2500 KHz on a case-by-case basis.

3To 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.

4For exceptions, see §101.147(s).

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

6For 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.

7For 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.

8For 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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