§  25.218   Off-axis EIRP envelopes for FSS earth station operations.

   (a) This section applies to all applications for FSS earth stations
   operating in the C-band, Ku-band, or extended Ku-band, except for:

   (1) ESV, VMES and ESAA applications

   (2) Analog video earth station applications, and

   (3) Applications for feeder-link earth stations in the 17/24 GHz BSS.

   (b) Earth station applications subject to this section are eligible for
   routine processing if they meet the applicable off-axis EIRP envelope
   set forth in this section below. For purposes of this section, the term
   "extended Ku-band" is the 10.7 through 11.7 GHz, 12.75 through 13.25
   GHz, and 13.75 through 14.0 GHz band. The term "conventional Ku-band"
   is defined in §  25.201 of this chapter.

   (c) C-band analog earth station operations. (1) In the plane of the
   geostationary satellite orbit as it appears at the particular earth
   station location:
   29.5-25log[10]th dBW/4 kHz For 1.5DEG <=th <=7DEG
   8.5              dBW/4 kHz For 7DEG 7.0DEG. For th greater than 7.0DEG, the
   envelope may be exceeded by no more than 10% of the sidelobes, provided
   no individual sidelobe exceeds the envelope given above by more than 3
   dB.

   (2) In all other directions, or in the plane of the horizon including
   any out-of-plane potential terrestrial interference paths:
   32.5-25log[10]th dBW/4 kHz For 3DEG <=th <=48DEG
   -9.5             dBW/4 kHz For 48DEG 7.0DEG.
   For th greater than 7.0DEG, the envelope may be exceeded by no more
   than 10% of the sidelobes, provided no individual sidelobe exceeds the
   envelope given above by more than 3 dB. 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.

   (2) In all other directions, or in the plane of the horizon including
   any out-of-plane potential terrestrial interference paths:
   29.3-10log[10](N)-25log[10]th dBW/4 kHz For 3DEG <=th <=48DEG
   -12.7-10log[10](N)            dBW/4 kHz For 48DEG 7.0DEG. For th greater than 7.0DEG, the
   envelope may be exceeded by no more than 10% of the sidelobes, provided
   no individual sidelobe exceeds the envelope given above by more than 3
   dB.

   (2) In all other directions, or in the plane of the horizon including
   any out-of-plane potential terrestrial interference paths:
   24-25log[10]th dBW/4 kHz For 3DEG <=th <=48DEG
   -18            dBW/4 kHz For 48DEG 7.0DEG.
   For th greater than 7.0DEG, the envelope may be exceeded by no more
   than 10% of the sidelobes, provided no individual sidelobe exceeds the
   envelope given above by more than 3 dB. 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.

   (2) In all other directions, or in the plane of the horizon including
   any out-of-plane potential terrestrial interference paths:
   18-10log[10](N)-25log[10]th dBW/4 kHz For 3DEG <=th <=48DEG
   -24-10log[10](N)            dBW/4 kHz For 48DEG 7.0DEG. For th greater than
   7.0DEG, the envelope may be exceeded by no more than 10% of the
   sidelobes, provided no individual sidelobe exceeds the envelope given
   above by more than 3 dB.

   (2) In all other directions, or in the plane of the horizon including
   any out-of-plane potential terrestrial interference paths:
   24-25log[10]th dBW/4 kHz For 3DEG <=th <=48DEG
   -18            dBW/4 kHz For 48DEG 7.0DEG.
   For th greater than 7.0DEG, the envelope may be exceeded by no more
   than 10% of the sidelobes, provided no individual sidelobe exceeds the
   envelope given above by more than 3 dB. 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.

   (2) In all other directions, or in the plane of the horizon including
   any out-of-plane potential terrestrial interference paths:
   18-10log[10](N)-25log[10]th dBW/4 kHz For 3DEG <=th <=48DEG
   -24-10log[10](N)            dBW/4 kHz For 48DEG 73 FR 70902 , Nov. 24, 2008, as amended at  74 FR 57099 , Nov. 4, 2009;
    78 FR 8429 , Feb. 6, 2013;  78 FR 14927 , Mar. 8, 2013]

   Effective Date Note: At  74 FR 9962 , Mar. 9, 2009, §  25.218, which
   contains information collection and recordkeeping requirements, became
   effective with approval by the Office of Management and Budget for a
   period of three years.

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