Sec. 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 Specifi
c 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\ 5
00 \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 Sec. 73.699, Fig.
10).
\2\ Maximum ERP of 500 watts allowed. Signal strength at the service area contour may be less th
an 37 dBu.
\3\ When the actual antenna HAAT is greater than the reference HAAT, the allowable ERP will be r
educed in accordance with the following equation:
ERPallow = ERPmax x (HAATref / HAATactual)\2\.
\4\ Applications for this service area radius may be granted upon specific request with justific
ation and must include a technical demonstration that
the signal strength at the edge of the service area does not exceed 37 dBu.
(e) 220-222 MHz. Limitations on power and antenna heights are
specified in Sec. 90.729.
(f) 421-430 MHz. Limitations on power and antenna heights are
specified in Sec. 90.279.
(g) 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
[[Page 458]]
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 Specif
ic 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\ 5
00 \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 Sec. 73.699, Fig.
10 b).
\2\ Maximum ERP of 500 watts allowed. Signal strength at the service area contour may be less th
an 39 dBu.
\3\ When the actual antenna HAAT is greater than the reference HAAT, the allowable ERP will be r
educed in accordance with the following equation:
ERPallow = ERPmax x (HAATref / HAATactual)\2\.
\4\ Applications for this service area radius may be granted upon specific request with justific
ation and must include a technical demonstration that
the signal strength at the edge of the service area does not exceed 39 dBu.
(h) 470-512 MHz. Power and height limitations are specified in
Secs. 90.307 and 90.309.
(i) 806-824/851-869 MHz and 896-901/935-940 MHz. Power and height
limitations are specified in Sec. 90.635.
(j) 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 Sec. 90.353(h).
(k) 929-930 MHz. Limitations on power and antenna heights are
specified in Sec. 90.494.
(l) 2450-2483.5 MHz. The maximum transmitter power is 5 watts.
(m) All other frequency bands. Requested transmitter power will be
considered and authorized on a case by case basis.
(n) 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 Sec. 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]
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