§  25.204   Power limits for earth stations.

   (a) In bands shared coequally with terrestrial radio communication
   services, the equivalent isotropically radiated power transmitted in
   any direction towards the horizon by an earth station, other than an
   ESV, operating in frequency bands between 1 and 15 GHz, shall not
   exceed the following limits except as provided for in paragraph (c) of
   this section:

   + 40 dBW in any 4 kHz band for th <=0°

   + 40 + 3th dBW in any 4 kHz band for 0° 29.25-30.0 GHz bands may employ uplink
   adaptive power control or other methods of fade compensation. For
   stations employing uplink power control, the values in § 25.218(i)(1),
   (2), and (4) may be exceeded by up to 20 dB under conditions of uplink
   fading due to precipitation. The amount of such increase in excess of
   the actual amount of monitored excess attenuation over clear sky
   propagation conditions must not exceed 1.5 dB or 15 percent of the
   actual amount of monitored excess attenuation in dB, whichever is
   larger, with a confidence level of 90 percent except over transient
   periods accounting for no more than 0.5 percent of the time during
   which the excess is no more than 4.0 dB.

   (f) An earth station in the Fixed-Satellite Service transmitting in the
   13.75-14 GHz band must have a minimum antenna diameter of 4.5 m, and
   the EIRP of any emission in that band should be at least 68 dBW and
   should not exceed 85 dBW.

   (g) [Reserved]

   [ 48 FR 40255 , Sept. 6, 1983, as amended at  58 FR 13420 , Mar. 11, 1993;
    61 FR 52307 , Oct. 7, 1996;  62 FR 61457 , Nov. 18, 1997;  66 FR 10623 ,
   Feb. 16, 2001;  70 FR 4784 , Jan. 31, 2005;  70 FR 32255 , June 2, 2005;  72 FR 50029 , Aug. 29, 2007;  74 FR 57098 , Nov. 4, 2009;  78 FR 8427 , Feb. 6,
   2013;  78 FR 14927 , Mar. 8, 2013;  79 FR 8322 , Feb. 12, 2004;  81 FR 55336 , Aug. 18, 2016;  83 FR 34491 , July 20, 2018;  84 FR 53655 , Oct. 8,
   2019]