Goto Section: 73.205 | 73.208 | Table of Contents

FCC 73.207
Revised as of November 23, 2020
Goto Year:2020 | 2022
  §  73.207   Minimum distance separation between stations.

   (a) Except for assignments made pursuant to § 73.213 or 73.215, FM
   allotments and assignments must be separated from other allotments and
   assignments on the same channel (co-channel) and five pairs of adjacent
   channels by not less than the minimum distances specified in paragraphs
   (b) and (c) of this section. The Commission will not accept petitions
   to amend the Table of Allotments unless the reference points meet all
   of the minimum distance separation requirements of this section. The
   Commission will not accept applications for new stations, or
   applications to change the channel or location of existing assignments
   unless transmitter sites meet the minimum distance separation
   requirements of this section, or such applications conform to the
   requirements of § 73.213 or 73.215. However, applications to modify the
   facilities of stations with short-spaced antenna locations authorized
   pursuant to prior waivers of the distance separation requirements may
   be accepted, provided that such applications propose to maintain or
   improve that particular spacing deficiency. Class D (secondary)
   assignments are subject only to the distance separation requirements
   contained in paragraph (b)(3) of this section. (See § 73.512 for rules
   governing the channel and location of Class D (secondary) assignments.)

   (b) The distances listed in Tables A, B, and C apply to allotments and
   assignments on the same channel and each of five pairs of adjacent
   channels. The five pairs of adjacent channels are the first (200 kHz
   above and 200 kHz below the channel under consideration), the second
   (400 kHz above and below), the third (600 kHz above and below), the
   fifty-third (10.6 MHz above and below), and the fifty-fourth (10.8 MHz
   above and below). The distances in the Tables apply regardless of
   whether the proposed station class appears first or second in the
   “Relation” column of the table.

   (1) Domestic allotments and assignments must be separated from each
   other by not less than the distances in Table A which follows:

   Table A—Minimum Distance Separation Requirements in Kilometers (miles)
   Relation Co-channel 200 kHz   400/600 kHz 10.6/10.8 MHz
   A to A      115 (71)  72 (45)      31 (19)       10 (6)
   A to B1     143 (89)  96 (60)      48 (30)       12 (7)
   A to B     178 (111) 113 (70)      69 (43)       15 (9)
   A to C3     142 (88)  89 (55)      42 (26)       12 (7)
   A to C2    166 (103) 106 (66)      55 (34)       15 (9)
   A to C1    200 (124) 133 (83)      75 (47)      22 (14)
   A to C0    215 (134) 152 (94)      86 (53)      25 (16)
   A to C     226 (140) 165 (103)      95 (59)      29 (18)
   B1 to B1   175 (109) 114 (71)      50 (31)       14 (9)
   B1 to B    211 (131) 145 (90)      71 (44)      17 (11)
   B1 to C3   175 (109) 114 (71)      50 (31)       14 (9)
   B1 to C2   200 (124) 134 (83)      56 (35)      17 (11)
   B1 to C1   233 (145) 161 (100)      77 (48)      24 (15)
   B1 to C0   248 (154) 180 (112)      87 (54)      27 (17)
   B1 to C    259 (161) 193 (120)     105 (65)      31 (19)
   B to B     241 (150) 169 (105)      74 (46)      20 (12)
   B to C3    211 (131) 145 (90)      71 (44)      17 (11)
   B to C2    241 (150) 169 (105)      74 (46)      20 (12)
   B to C1    270 (168) 195 (121)      79 (49)      27 (17)
   B to C0    272 (169) 214 (133)      89 (55)      31 (19)
   B to C     274 (170) 217 (135)     105 (65)      35 (22)
   C3 to C3    153 (95)  99 (62)      43 (27)       14 (9)
   C3 to C2   177 (110) 117 (73)      56 (35)      17 (11)
   C3 to C1   211 (131) 144 (90)      76 (47)      24 (15)
   C3 to C0   226 (140) 163 (101)      87 (54)      27 (17)
   C3 to C    237 (147) 176 (109)      96 (60)      31 (19)
   C2 to C2   190 (118) 130 (81)      58 (36)      20 (12)
   C2 to C1   224 (139) 158 (98)      79 (49)      27 (17)
   C2 to C0   239 (148) 176 (109)      89 (55)      31 (19)
   C2 to C    249 (155) 188 (117)     105 (65)      35 (22)
   C1 to C1   245 (152) 177 (110)      82 (51)      34 (21)
   C1 to C0   259 (161) 196 (122)      94 (58)      37 (23)
   C1 to C    270 (168) 209 (130)     105 (65)      41 (25)
   C0 to C0   270 (168) 207 (129)      96 (60)      41 (25)
   C0 to C    281 (175) 220 (137)     105 (65)      45 (28)
   C to C     290 (180) 241 (150)     105 (65)       48 (30)

   (2) Under the Canada-United States FM Broadcasting Agreement, domestic
   U.S. allotments and assignments within 320 kilometers (199 miles) of
   the common border must be separated from Canadian allotments and
   assignments by not less than the distances given in Table B, which
   follows. When applying Table B, U.S. Class C2 allotments and
   assignments are considered to be Class B; also, U.S. Class C3
   allotments and assignments and U.S. Class A assignments operating with
   more than 3 kW ERP and 100 meters antenna HAAT (or equivalent lower ERP
   and higher antenna HAAT based on a class contour distance of 24 km) are
   considered to be Class B1.

   Table B—Minimum Distance Separation Requirements in Kilometers
   Relation Co-Channel    Adjacent Channels        I.F.
              0 kHz    200 kHz 400 kHz 600 kHz 10.6/10.8 MHz
   A-A             132      85      45      37             8
   A-B1            180     113      62      54            16
   A-B             206     132      76      69            16
   A-C1            239     164      98      90            32
   A-C             242     177     108     100            32
   B1-B1           197     131      70      57            24
   B1-B            223     149      84      71            24
   B1-C1           256     181     106      92            40
   B1-C            259     195     116     103            40
   B-B             237     164      94      74            24

   B-C1            271     195     115      95            40
   B-C             274     209     125     106            40
   C1-C1           292     217     134     101            48
   C1-C            302     230     144     111            48
   C-C             306     241     153     113            48

   (3) Under the 1992 Mexico-United States FM Broadcasting Agreement,
   domestic U.S. assignments or allotments within 320 kilometers (199
   miles) of the common border must be separated from Mexican assignments
   or allotments by not less than the distances given in Table C in this
   paragraph (b)(3). When applying Table C—

   (i) U.S. or Mexican assignments or allotments which have been notified
   internationally as Class A are limited to a maximum of 3.0 kW ERP at
   100 meters HAAT, or the equivalent;

   (ii) U.S. or Mexican assignments or allotments which have been notified
   internationally as Class AA are limited to a maximum of 6.0 kW ERP at
   100 meters HAAT, or the equivalent;

   (iii) U.S. Class C3 assignments or allotments are considered Class B1;

   (iv) U.S. Class C2 assignments or allotments are considered Class B;
   and

   (v) Class C1 assignments or allotments assume maximum facilities of 100
   kW ERP at 300 meters HAAT. However, U.S. Class C1 stations may not, in
   any event, exceed the domestic U.S. limit of 100 kW ERP at 299 meters
   HAAT, or the equivalent.

   Table C—Minimum Distance Separation Requirements in Kilometers
   Relation Co-Channel 200 kHz 400 kHz or 600 kHz 10.6 or 10.8 MHz (I.F.)
   A to A          100      61                 25                       8
   A to AA         111      68                 31                       9
   A to B1         138      88                 48                      11
   A to B          163     105                 65                      14
   A to C1         196     129                 74                      21
   A to C          210     161                 94                      28
   AA to AA        115      72                 31                      10
   AA to B1        143      96                 48                      12
   AA to B         178     125                 69                      15
   AA to C1        200     133                 75                      22
   AA to C         226     165                 95                      29
   B1 to B1        175     114                 50                      14
   B1 to B         211     145                 71                      17
   B1 to C1        233     161                 77                      24
   B1 to C         259     193                 96                      31
   B to B          237     164                 65                      20
   B to C1         270     195                 79                      27
   B to C          270     215                 98                      35
   C1 to C1        245     177                 82                      34
   C1 to C         270     209                102                      41
   C to C          290     228                105                      48

   (c) The distances listed below apply only to allotments and assignments
   on Channel 253 (98.5 MHz). The Commission will not accept petitions to
   amend the Table of Allotments, applications for new stations, or
   applications to change the channel or location of existing assignments
   where the following minimum distances (between transmitter sites, in
   kilometers) from any TV Channel 6 allotment or assignment are not met:

   Minimum Distance Separation From TV Channel 6 (82-88 MHz)
   FM Class TV Zone I TV Zones II & III
   A               17                22
   B1              19                23
   B               22                26
   C3              19                23
   C2              22                26
   C1              29                33
   C               36                41

   [ 48 FR 29504 , June 27, 1983, as amended at  49 FR 10264 , Mar. 20, 1984;
    49 FR 19670 , May 9, 1984;  49 FR 50047 , Dec. 26, 1984;  51 FR 26250 , July
   22, 1986;  54 FR 14963 , Apr. 14, 1989;  54 FR 16366 , Apr. 24, 1989;  54 FR 19374 , May 5, 1989;  54 FR 35338 , Aug. 25, 1989;  56 FR 27426 , June 14,
   1991;  56 FR 57293 , Nov. 8, 1991;  62 FR 50256 , Sept. 25, 1997;  65 FR 79776 , Dec. 20, 2000]

   


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Goto Year: 2020 | 2022
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