FCC 73.807 Revised as of October 1, 2006
Goto Year:2005 |
2007
Sec. 73.807 Minimum distance separation between stations.
Minimum separation requirements for LP100 and LP10 stations, as defined in
Sec. Sec. 73.811 and 73.853, are listed in the following paragraphs. An LPFM station
will not be authorized unless these separations are met. Minimum distances
for co-channel and first-adjacent channel are separated into two columns.
The left-hand column lists the required minimum separation to protect other
stations and the right-hand column lists (for informational purposes only)
the minimum distance necessary for the LPFM station to receive no
interference from other stations assumed to operating at the maximum
permitted facilities for the station class. For second- and third-adjacent
channels and IF channels, the required minimum distance separation is
sufficient to avoid interference received from other stations.
(a)(1) An LP100 station will not be authorized initially unless the minimum
distance separations in the following table are met with respect to
authorized FM stations, applications for new and existing FM stations filed
prior to the release of the public notice announcing an LPFM window period
for LP100 stations, authorized LP100 stations, LP100 station applications
that were timely-filed within a previous window, and vacant FM allotments.
LP100 stations are not required to protect LP10 stations. LPFM modification
applications must either meet the distance separations in the following
table or, if short-spaced, not lessen the spacing to subsequently authorized
stations.
-------------------------------------------------------------------------------
---------------------------------
Co-channel minimum First-adjacent c
hannel Second- and I.F.
separation (km) minimum separatio
n (km) third- channel
----------------------------------------------
-------- adjacent minimum
For no Fo
r no channel separations
Station class protected by LP100 interference inter
ference minimum ------------
received rec
eived separation
Required from max. Required fro
m max. (km) 10.6 or
class c
lass ------------- 10.8 MHz
facility fac
ility Required
-------------------------------------------------------------------------------
---------------------------------
LP100........................... 24 24 14
14 None None
D............................... 24 24 13
13 6 3
A............................... 67 92 56
56 29 6
B1.............................. 87 119 74
74 46 9
B............................... 112 143 97
97 67 12
C3.............................. 78 119 67
67 40 9
C2.............................. 91 143 80
84 53 12
C1.............................. 111 178 100
111 73 20
C0.............................. 122 193 111
130 84 22
C............................... 130 203 120
142 93 28
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---------------------------------
(2) LP100 stations must satisfy the second-adjacent channel minimum distance
separation requirements of paragraph (a)(1) of this section with respect to
any third-adjacent channel FM station that, as of September 20, 2000 (the
adoption date of this MO&O) broadcasts a radio reading service via a
subcarrier frequency.
(b)(1) An LP10 station will not be authorized unless the minimum distance
separations in the following table are met with respect to authorized FM
stations, applications for new and existing FM stations filed prior to the
release of the public notice announcing an LPFM window period for LP10
stations, vacant FM allotments, or LPFM stations.
-------------------------------------------------------------------------------
---------------------------------
Co-channel minimum First-adjacent c
hannel Second- and I.F.
separation (km) minimum separatio
n (km) third- Channel
----------------------------------------------
-------- adjacent minimum
For no Fo
r no channel separations
Station class protected by LP10 interference inter
ference minimum ------------
received rec
eived separation
Required from max. Required fro
m max. (km) 10.6 or
class c
lass ------------- 10.8 MHz
facility fac
ility Required
-------------------------------------------------------------------------------
---------------------------------
LP100........................... 16 22 10
11 None None
LP10............................ 13 13 8
8 None None
D............................... 16 21 10
11 6 2
A............................... 59 90 53
53 29 5
B1.............................. 77 117 70
70 45 8
B............................... 99 141 91
91 66 11
C3.............................. 69 117 64
64 39 8
C2.............................. 82 141 77
81 52 11
C1.............................. 103 175 97
108 73 18
C0.............................. 114 190 99
127 84 21
C............................... 122 201 116
140 92 26
-------------------------------------------------------------------------------
---------------------------------
(2) LP10 stations must satisfy the second-adjacent channel minimum distance
separation requirements of paragraph (b)(1) of this section with respect to
any third-adjacent channel FM station that, as of September 20, 2000 (the
adoption date of this MO&O) broadcasts a radio reading service via a
subcarrier frequency.
(c) In addition to meeting or exceeding the minimum separations for Class
LP100 and Class LP10 stations in paragraphs (a) and (b) of this section, new
LP100 and LP10 stations will not be authorized in Puerto Rico or the Virgin
Islands unless the minimum distance separations in the following tables are
met with respect to authorized or proposed FM stations:
(1) LP100 stations in Puerto Rico and the Virgin Islands:
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
Co-chann
el minimum First-adjacent channel
separat
ion (km) minimum separation (km) Second- and
-------------
----------------------------------------- third-
For no For no adjacent I.F. channel
Station class protected by LP100
interference interference channel minimum
received received minimum separations_10.6
Required
from max. Required from max. separation or 10.8 MHz
class class (km)_required
facility facility
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
A................................................................ 80
111 70 70 42 9
B1............................................................... 95
128 82 82 53 11
B................................................................ 138
179 123 123 92 19
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
(2) LP10 stations in Puerto Rico and the Virgin Islands:
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
Co-chann
el minimum First-adjacent channel
separat
ion (km) minimum separation (km) Second- and
-------------
----------------------------------------- third-
For no For no adjacent I.F. channel
Station class protected by LP100
interference interference channel minimum
received received minimum separations_10.6
Required
from max. Required from max. separation or 10.8 MHz
class class (km)_required
facility facility
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
A................................................................ 72
108 66 66 42 8
B1............................................................... 84
125 78 78 53 9
B................................................................ 126
177 118 118 92 18
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
Note to paragraphs (a), (b), and (c): Minimum distance separations towards
“grandfathered” superpowered Reserved Band stations are as specified.
Full service FM stations operating within the reserved band (Channels
201–220) with facilities in excess of those permitted in Sec. 73.211(b)(1) or
Sec. 73.211(b)(3) shall be protected by LPFM stations in accordance with the
minimum distance separations for the nearest class as determined under
Sec. 73.211. For example, a Class B1 station operating with facilities that
result in a 60 dBu contour that exceeds 39 kilometers but is less than 52
kilometers would be protected by the Class B minimum distance separations.
Class D stations with 60 dBu contours that exceed 5 kilometers will be
protected by the Class A minimum distance separations. Class B stations with
60 dBu contours that exceed 52 kilometers will be protected as Class C1 or
Class C stations depending upon the distance to the 60 dBu contour. No
stations will be protected beyond Class C separations.
(d) In addition to meeting the separations (a) through (c), LPFM
applications must meet the minimum separation requirements with respect to
authorized FM translator stations, cutoff FM translator applications, and FM
translator applications filed prior to the release of the Public Notice
announcing the LPFM window period:
(1) LP100 stations:
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
Co-channel
minimum First-adjacent channel Second- and
separatio
n (km) minimum separation (km) third-adjacent I.F . Channel
----------------
------------------------------------------ channel minimum
Distance to FM translator 60 dBu contour
For no For no minimum separation
Required i
nterference Required interference separation (km) 10.6 or
received received (km) required 10.8 MHz
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
13.3 km or greater............................................ 39
67 28 35 21 5
Greater than 7.3 km, but less than 13.3 km.................... 32
51 21 26 14 5
7.3 km or less................................................ 26
30 15 16 8 5
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
(2) LP10 Stations:
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
Co-channel
minimum First-adjacent channel Second- and
separatio
n (km) minimum separation (km) third-adjacent I.F . Channel
----------------
------------------------------------------ channel minimum
Distance to FM translator 60 dBu contour
For no For no minimum separation
Required i
nterference Required interference separation (km) 10.6 or
received received (km) required 10.8 MHz
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
13.3 km or greater............................................ 30
65 25 33 20 3
Greater than 7.3 km, but less than 13.3 km.................... 24
49 18 23 14 3
7.3 km or less................................................ 18
28 12 14 8 3
-------------------------------------------------------------------------------
-------------------------------------------------------------------------
(e) Existing Class LP100 and LP10 stations which do not meet the separations
in paragraphs (a) through (e) of this section may be relocated provided that
the separation to any short-spaced station is not reduced.
(f) Commercial and noncommercial educational stations authorized under
subparts B and C of this part, as well as new or modified commercial FM
allotments, are not required to adhere to the separations specified in this
rule section, even where new or increased interference would be created.
(g) International considerations within the border zones. (1) Within 320 km
of the Canadian border, LP100 stations must meet the following minimum
separations with respect to any Canadian stations:
-------------------------------------------------------------------------------
---------------------------------
First- Sec
ond- Third- Intermediate
Co-channel adjacent adj
acent adjacent frequency
Canadian station class (km) channel cha
nnel channel (IF) channel
(km) (
km) (km) (km)
-------------------------------------------------------------------------------
---------------------------------
A1 & Low Power............................ 45 30
21 20 4
A............................................. 66 50
41 40 7
B1............................................ 78 62
53 52 9
B............................................. 92 76
68 66 12
C1............................................ 113 98
89 88 19
C............................................. 124 108
99 98 28
-------------------------------------------------------------------------------
---------------------------------
(2) Within 320 km of the Mexican border, LP100 stations must meet the
following separations with respect to any Mexican stations:
-------------------------------------------------------------------------------
---------------------------------
Second-
Fi
rst- third Intermediate
Mexican station class Co-channel adj
acent adjacent frequency
(km) cha
nnel channel (IF) channel
(
km) (km) (km)
-------------------------------------------------------------------------------
---------------------------------
Low Power.................................................. 27
17 9 3
A.......................................................... 43
32 25 5
AA......................................................... 47
36 29 6
B1......................................................... 67
54 45 8
B.......................................................... 91
76 66 11
C1......................................................... 91
80 73 19
C.......................................................... 110
100 92 27
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---------------------------------
(3) Within 320 km of the Canadian border, LP10 stations must meet the
following minimum separations with respect to any Canadian stations:
-------------------------------------------------------------------------------
---------------------------------
First- Sec
ond- Third- Intermediate
Co-channel adjacent adj
acent adjacent frequency
Canadian station class (km) channel cha
nnel channel (IF) channel
(km) (
km) (km) (km)
-------------------------------------------------------------------------------
---------------------------------
A1 & Low Power............................ 33 25
20 19 3
A............................................. 53 45
40 39 5
B1............................................ 65 57
52 51 8
B............................................. 79 71
67 66 11
C1............................................ 101 93
88 87 18
C............................................. 111 103
98 97 26
-------------------------------------------------------------------------------
---------------------------------
(4) Within 320 km of the Mexican border, LP10 stations must meet the
following separations with respect to any Mexican stations:
-------------------------------------------------------------------------------
---------------------------------
Second-
Fi
rst- third Intermediate
Mexican station class Co-channel adj
acent adjacent frequency
(km) cha
nnel channel (IF) channel
(
km) (km) (km)
-------------------------------------------------------------------------------
---------------------------------
Low Power.................................................. 19
13 9 2
A.......................................................... 34
29 24 5
AA......................................................... 39
33 29 5
B1......................................................... 57
50 45 8
B.......................................................... 79
71 66 11
C1......................................................... 83
77 73 18
C.......................................................... 102
96 92 26
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---------------------------------
(5) The Commission will notify the International Telecommunications Union
(ITU) of any LPFM authorizations in the US Virgin Islands. Any authorization
issued for a US Virgin Islands LPFM station will include a condition that
permits the Commission to modify, suspend or terminate without right to a
hearing if found by the Commission to be necessary to conform to any
international regulations or agreements.
(6) The Commission will initiate international coordination of a LPFM
proposal even where the above Canadian and Mexican spacing tables are met,
if it appears that such coordination is necessary to maintain compliance
with international agreements.
[ 65 FR 7640 , Feb. 15, 2000, as amended at 65 FR 67299 , Nov. 9, 2000; 65 FR 79779 , Dec. 20, 2000; 66 FR 23863 , May 10, 2001]
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