Goto Section: 90.203 | 90.207 | Table of Contents
FCC 90.205
Revised as of December 4, 2012
Goto Year:2011 |
2013
§ 90.205 Power and antenna height limits.
Applicants for licenses must request and use no more power than the
actual power necessary for satisfactory operation. Except where
otherwise specifically provided for, the maximum power that will be
authorized to applicants whose license applications for new stations
are filed after August 18, 1995 is as follows:
(a) Below 25 MHz. For single sideband operations (J3E emission), the
maximum transmitter peak envelope power is 1000 watts.
(b) 25-50 MHz. The maximum transmitter output power is 300 watts.
(c) 72-76 MHz. The maximum effective radiated power (ERP) for stations
operating on fixed frequencies is 300 watts. Stations operating on
mobile-only frequencies are limited to one watt transmitter output
power.
(d) 150-174 MHz. (1) The maximum allowable station ERP is dependent
upon the station's antenna HAAT and required service area and will be
authorized in accordance with table 1. Applicants requesting an ERP in
excess of that listed in table 1 must submit an engineering analysis
based upon generally accepted engineering practices and standards that
includes coverage contours to demonstrate that the requested station
parameters will not produce coverage in excess of that which the
applicant requires.
(2) Applications for stations where special circumstances exist that
make it necessary to deviate from the ERP and antenna heights in Table
1 will be submitted to the frequency coordinator accompanied by a
technical analysis, based upon generally accepted engineering practices
and standards, that demonstrates that the requested station parameters
will not produce a signal strength in excess of 37 dBu at any point
along the edge of the requested service area. The coordinator may then
recommend any ERP appropriate to meet this condition.
(3) An applicant for a station with a service area radius greater than
40 km (25 mi) must justify the requested service area radius, which
will be authorized only in accordance with table 1, note 4. For base
stations with service areas greater than 80 km, all operations 80 km or
less from the base station will be on a primary basis and all
operations outside of 80 km from the base station will be on a
secondary basis and will be entitled to no protection from primary
operations.
Table 1—150-174MHz—Maximum ERP/Reference HAAT for a Specific Service
Area Radius
Service area radius (km)
3 8 13 16 24 32 40 48 ^4 64 ^4 80 ^4
Maximum ERP (w) ^1 1 28 178 ^2 500 ^2 500 ^2 500 500 ^2 500 ^2 500
^2 500
Up to reference HAAT (m) ^3 15 15 15 15 33 65 110 160 380 670
^1 Maximum ERP indicated provides for a 37 dBu signal strength at the
edge of the service area per FCC Report R-6602, Fig. 19 (See § 73.699,
Fig. 10).
^2 Maximum ERP of 500 watts allowed. Signal strength at the service
area contour may be less than 37 dBu.
^3 When the actual antenna HAAT is greater than the reference HAAT, the
allowable ERP will be reduced in accordance with the following
equation: ERP[allow] = ERP[max]× (HAAT[ref] / HAAT[actual]) ^2.
^4 Applications for this service area radius may be granted upon
specific request with justification and must include a technical
demonstration that the signal strength at the edge of the service area
does not exceed 37 dBu.
(e) 217-220 MHz. Limitations on power and antenna heights are specified
in § 90.259.
(f) 220-222 MHz. Limitations on power and antenna heights are specified
in § 90.729.
(g) 421-430 MHz. Limitations on power and antenna heights are specified
in § 90.279.
(h) 450-470 MHz. (1) The maximum allowable station effective radiated
power (ERP) is dependent upon the station's antenna HAAT and required
service area and will be authorized in accordance with table 2.
Applicants requesting an ERP in excess of that listed in table 2 must
submit an engineering analysis based upon generally accepted
engineering practices and standards that includes coverage contours to
demonstrate that the requested station parameters will not produce
coverage in excess of that which the applicant requires.
(2) Applications for stations where special circumstances exist that
make it necessary to deviate from the ERP and antenna heights in Table
2 will be submitted to the frequency coordinator accompanied by a
technical analysis, based upon generally accepted engineering practices
and standards, that demonstrates that the requested station parameters
will not produce a signal strength in excess of 39 dBu at any point
along the edge of the requested service area. The coordinator may then
recommend any ERP appropriate to meet this condition.
(3) An applicant for a station with a service area radius greater than
32 km (20 mi) must justify the requested service area radius, which may
be authorized only in accordance with table 2, note 4. For base
stations with service areas greater than 80 km, all operations 80 km or
less from the base station will be on a primary basis and all
operations outside of 80 km from the base station will be on a
secondary basis and will be entitled to no protection from primary
operations.
Table 2—450-470 MHz—Maximum ERP/Reference HAAT for a Specific Service
Area Radius
Service area radius (km)
3 8 13 16 24 32 40 ^4 48 ^4 64 ^4 80 ^4
Maximum ERP (w) ^1 2 100 ^2 500 ^2 500 ^2 500 ^2 500 ^2 500 ^2 500
^2 500 ^2 500
Up to reference HAAT (m) ^3 15 15 15 27 63 125 250 410 950 2700
^1 Maximum ERP indicated provides for a 39 dBu signal strength at the
edge of the service area per FCC Report R-6602, Fig. 29 (See § 73.699,
Fig. 10 b).
^2 Maximum ERP of 500 watts allowed. Signal strength at the service
area contour may be less than 39 dBu.
^3 When the actual antenna HAAT is greater than the reference HAAT, the
allowable ERP will be reduced in accordance with the following
equation: ERP[allow] = ERP[max]× (HAAT[ref] / HAAT[actual]) ^2.
^4 Applications for this service area radius may be granted upon
specific request with justification and must include a technical
demonstration that the signal strength at the edge of the service area
does not exceed 39 dBu.
(i) 470-512 MHz. Power and height limitations are specified in
§ § 90.307 and 90.309.
(j) 763-775 MHz and 793-805 MHz. Power and height limitations are
specified in § § 90.541 and 90.542.
(k) 806-824 MHz, 851-869 MHz, 896-901 MHz and 935-940 MHz. Power and
height limitations are specified in § 90.635
(l) 902-928 MHz. LMS systems operating pursuant to subpart M of this
part in the 902-927.25 MHz band will be authorized a maximum of 30
watts ERP. LMS equipment operating in the 927.25-928 MHz band will be
authorized a maximum of 300 watts ERP. ERP must be measured as peak
envelope power. Antenna heights will be as specified in § 90.353(h).
(m) 929-930 MHz. Limitations on power and antenna heights are specified
in § 90.494.
(n) 1427-1429.5 MHz and 1429.5-1432 MHz. Limitations on power are
specified in § 90.259.
(o) 2450-2483.5 MHz. The maximum transmitter power is 5 watts.
(p) 4940-4990 MHz. Limitations on power are specified in § 90.1215.
(q) 5850-5925 MHz . Power and height limitations are specified in
subpart M of this part.
(r) All other frequency bands. Requested transmitter power will be
considered and authorized on a case by case basis.
(s) The output power shall not exceed by more than 20 percent either
the output power shown in the Radio Equipment List [available in
accordance with § 90.203(a)(1)] for transmitters included in this list
or when not so listed, the manufacturer's rated output power for the
particular transmitter specifically listed on the authorization.
[ 60 FR 37262 , July 19, 1995, as amended at 62 FR 2039 , Jan. 15, 1997;
63 FR 58651 , Nov. 2, 1998; 64 FR 66409 , Nov. 26, 1999; 67 FR 41860 ,
June 20, 2002; 68 FR 38639 , June 30, 2003; 69 FR 46443 , Aug. 3, 2004;
72 FR 48860 , Aug. 24, 2007]
return arrow Back to Top
Goto Section: 90.203 | 90.207
Goto Year: 2011 |
2013
CiteFind - See documents on FCC website that
cite this rule
Want to support this service?
Thanks!
Report errors in
this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please
help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
hallikainen.com
Helping make public information public