Goto Section: 73.210 | 73.212 | Table of Contents
FCC 73.211
Revised as of October 1, 2008
Goto Year:2007 |
2009
Sec. 73.211 Power and antenna height requirements.
(a) Minimum requirements. (1) Except as provided in paragraphs (a)(3) and
(b)(2) of this section, FM stations must operate with a minimum effective
radiated power (ERP) as follows:
(i) The minimum ERP for Class A stations is 0.1 kW.
(ii) The ERP for Class B1 stations must exceed 6 kW.
(iii) The ERP for Class B stations must exceed 25 kW.
(iv) The ERP for Class C3 stations must exceed 6 kW.
(v) The ERP for Class C2 stations must exceed 25 kW.
(vi) The ERP for Class C1 stations must exceed 50 kW.
(vii) The minimum ERP for Class C and C0 stations is 100 kW.
(2) Class C0 stations must have an antenna height above average terrain
(HAAT) of at least 300 meters (984 feet). Class C stations must have an
antenna height above average terrain (HAAT) of at least 451 meters (1480
feet).
(3) Stations of any class except Class A may have an ERP less than that
specified in paragraph (a)(1) of this section, provided that the reference
distance, determined in accordance with paragraph (b)(1)(i) of this section,
exceeds the distance to the class contour for the next lower class. Class A
stations may have an ERP less than 100 watts provided that the reference
distance, determined in accordance with paragraph (b)(1)(i) of this section,
equals or exceeds 6 kilometers.
(b) Maximum limits. (1) Except for stations located in Puerto Rico or the
Virgin Islands, the maximum ERP in any direction, reference HAAT, and
distance to the class contour for each FM station class are listed below:
Station class Maximum ERP Reference HAAT in meters (ft.) Class contour
distance in kilometers
A 6 kW (7.8 dBk) 100 (328) 28
B1 25 kW (14.0 dBk) 100 (328) 39
B 50 kW (17.0 dBk) 150 (492) 52
C3 25 kW (14.0 dBk) 100 (328) 39
C2 50 kW (17.0 dBk) 150 (492) 52
C1 100 kW (20.0 dBk) 299 (981) 72
C0 100 kW (20.0 dBk) 450 (1476) 83
C 100 kW (20.0 dBk) 600 (1968) 92
(i) The reference distance of a station is obtained by finding the predicted
distance to the 1mV/m contour using Figure 1 of Sec. 73.333 and then rounding to
the nearest kilometer. Antenna HAAT is determined using the procedure in
Sec. 73.313. If the HAAT so determined is less than 30 meters (100 feet), a HAAT
of 30 meters must be used when finding the predicted distance to the 1 mV/m
contour.
(ii) If a station's ERP is equal to the maximum for its class, its antenna
HAAT must not exceed the reference HAAT, regardless of the reference
distance. For example, a Class A station operating with 6 kW ERP may have an
antenna HAAT of 100 meters, but not 101 meters, even though the reference
distance is 28 km in both cases.
(iii) Except as provided in paragraph (b)(3) of this section, no station
will be authorized in Zone I or I-A with an ERP equal to 50 kW and a HAAT
exceeding 150 meters. No station will be authorized in Zone II with an ERP
equal to 100 kW and a HAAT exceeding 600 meters.
(2) If a station has an antenna HAAT greater than the reference HAAT for its
class, its ERP must be lower than the class maximum such that the reference
distance does not exceed the class contour distance. If the antenna HAAT is
so great that the station's ERP must be lower than the minimum ERP for its
class (specified in paragraphs (a)(1) and (a)(3) of this section), that
lower ERP will become the minimum for that station.
(3) For stations located in Puerto Rico or the Virgin Islands, the maximum
ERP in any direction, reference HAAT, and distance to the class contour for
each FM station class are listed below:
Station class Maximum ERP Reference HAAT in meters (ft.) Class contour
distance in kilometers
A 6kW (7.8 dBk) 240 (787) 42
B1 25kW (14.0 dBk) 150 (492) 46
B 50kW (17.0 dBk) 472 (1549) 78
(c) Existing stations. Stations authorized prior to March 1, 1984 that do
not conform to the requirements of this section may continue to operate as
authorized. Stations operating with facilities in excess of those specified
in paragraph (b) of this section may not increase their effective radiated
powers or extend their 1 mV/m field strength contour beyond the location
permitted by their present authorizations. The provisions of this section
will not apply to applications to increase facilities for those stations
operating with less than the minimum power specified in paragraph (a) of
this section.
(d) Existing Class C stations below minimum antenna HAAT. Class C stations
authorized prior to January 19, 2001 that do not meet the minimum antenna
HAAT specified in paragraph (a)(2) of this section for Class C stations may
continue to operate as authorized subject to the reclassification procedures
set forth in Note 4 to Sec. 73.3573.
[ 53 FR 17042 , May 13, 1988, as amended at 54 FR 16367 , Apr. 24, 1989; 54 FR 19374 , May 5, 1989; 54 FR 35339 , Aug. 25, 1989; 65 FR 79777 , Dec. 20, 2000]
Goto Section: 73.210 | 73.212
Goto Year: 2007 |
2009
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