Sec.  25.212   Narrowband analog transmissions, digital transmissions, and video
transmissions in the GSO Fixed-Satellite Service.

   (a) Except as otherwise provided by this part, criteria for unacceptable
   levels of interference caused by other satellite networks shall be
   established on the basis of nominal operating conditions and with the
   objective of minimizing orbital separations between satellites.

   (b) Emissions with an occupied bandwidth of less than 2 MHz are not
   protected from interference from wider bandwidth transmissions if the r.f.
   carrier frequency of the narrowband signal is within  ±1 MHz of one of the
   frequencies specified in  Sec. 25.211(a).

   (c) In the 14.0–14.5 GHz band, an earth station with an antenna equivalent
   diameter of 1.2 meters or greater may be routinely licensed for transmission
   of narrowband analog services with bandwidths up to 200 kHz if the maximum
   input power spectral density into the antenna does not exceed −8 dBW/4 kHz
   and the maximum transmitted satellite carrier EIRP density does not exceed
   13 dBW/4 kHz. Such earth stations may be routinely licensed for transmission
   of narrowband and/or wideband digital services, including digital video
   services, if the maximum input spectral power density into the antenna does
   not exceed −14 dBW/4 kHz and the maximum transmitted satellite carrier EIRP
   density does not exceed +6.0 dBW/4 kHz. Antennas with a smaller major or
   minor axis in the 14 GHz band are subject to the provisions of  Sec. 25.220,
   which may include power reduction requirements.

   (d)(1) For earth stations licensed before March 10, 2005 in the 5925–6425
   MHz band, an earth station with an equivalent diameter of 4.5 meters or
   greater may be routinely licensed for transmission of SCPC services if the
   maximum power densities into the antenna do not exceed +0.5 dBW/4 kHz for
   analog SCPC carriers with bandwidths up to 200 kHz, and do not exceed −2.7
   dBW/4 kHz for narrow and/or wideband digital SCPC carriers.

   (2) For earth stations licensed after March 10, 2005 in the 5925–6425 MHz
   band, an earth station with an equivalent diameter of 4.5 meters or greater
   may be routinely licensed for transmission of SCPC services if the maximum
   power densities into the antenna do not exceed +0.5 dBW/4 kHz for analog
   SCPC carriers with bandwidths up to 200 kHz, and do not exceed −2.7 −
   10log(N) dBW/4 kHz for narrow and/or wideband digital SCPC carriers. For
   digital SCPC using frequency division multiple access (FDMA) or time
   division multiple access (TDMA) technique, N is equal to one. For digital
   SCPC using code division multiple access (CDMA) technique, N is the maximum
   number of co-frequency simultaneously transmitting earth stations in the
   same satellite receiving beam.

   (3) Antennas with an equivalent diameter smaller than 4.5 meters in the
   5925–6425 MHz band are subject to the provisions of  Sec. 25.220 of this chapter,
   which may include power reduction requirements.

   (e) Each applicant for authorization for transmissions in the
   fixed-satellite service proposing to use transmitted satellite carrier EIRP
   densities, and/or maximum antenna input power densities in excess of those
   specified in paragraph (c) of this section in the 14.0–14.5 GHz band, or in
   paragraph (d) of this section in the 5925–6425 MHz band, respectively, must
   comply with the procedures set forth in  Sec. 25.220.

   [ 58 FR 13421 , Mar. 11, 1993, as amended at  62 FR 5931 , Feb. 10, 1997;  62 FR 51378 , Oct. 1, 1997;  70 FR 32256 , June 2, 2005;  70 FR 33376 , June 8, 2005]