Goto Section: 73.205 | 73.208 | Table of Contents

FCC 73.207
Revised as of October 1, 2006
Goto Year:2005 | 2007
Sec.  73.207   Minimum distance separation between stations.

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

   (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 Ki
lometers
-------------------------------------------------------------------------------
---------------------------------
                                                                   Co-
 Adjacent Channels         I.F.
                                                                 Channel ------
---------------------------------
                           Relation                            ----------
                           10.6/
                                                                  0 kHz    200
kHz   400 kHz   600 kHz  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
------------------------------------------------------------------------
                                                     400 kHz    10.6 or
          Relation               Co-      200 kHz     or 600    10.8 MHz
                               Channel                 kHz       (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)
------------------------------------------------------------------------
                                                             TV Zones II
                   FM Class                      TV Zone I    & 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: 2005 | 2007
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