Goto Section: 90.203 | 90.207 | Table of Contents

FCC 90.205
Revised as of
Goto Year:1996 | 1998
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]


Goto Section: 90.203 | 90.207

Goto Year: 1996 | 1998
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