Goto Section: 73.205 | 73.208 | Table of Contents

FCC 73.207
Revised as of
Goto Year:1996 | 1998
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

[[Page 115]]

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                              
                                     (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 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 C.........................       259                              
                                     (161)       193                    
                                               (120)  105 (65)   31 (19)
B to B..........................       241                              
                                     (150)       169                    
                                               (105)   74 (46)   20 (12)
B t0 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 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 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 C.........................       249                              
                                     (155)       188                    
                                               (117)  105 (65)   35 (22)
C1 to C1........................       245                              
                                     (152)       177                    
                                               (110)   82 (51)   34 (21)
C1 to C.........................       270                              
                                     (168)       209                    
                                               (130)  105 (65)   41 (25)
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.

[[Page 116]]



                         Table B--Minimum Distance Separation Requirements in Kilometers        
                
------------------------------------------------------------------------------------------------
----------------
                                                              Co-            Adjacent Channels  
          I.F.  
                                                            Channel  ---------------------------
----------------
                         Relation                         -----------                           
       10.6/10.8
                                                             0 kHz     200 kHz    400 kHz    600
 kHz      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

[[Page 117]]

                                                                        
------------------------------------------------------------------------

    (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           
------------------------------------------------------------------------


[48 41 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]


Goto Section: 73.205 | 73.208

Goto Year: 1996 | 1998
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