Goto Section: 25.217 | 25.219 | Table of Contents

FCC 25.218
Revised as of October 1, 2014
Goto Year:2013 | 2015
  § 25.218   Off-axis EIRP density envelopes for FSS earth stations
transmitting in certain frequency bands.

   (a) This section applies to all applications for Fixed-Satellite
   Service earth stations transmitting to geostationary space stations in
   the C band, Ku band, or extended Ku band, except for:

   (1) ESV, VMES, and ESAA applications, and

   (2) Analog video earth station applications.

   (b) Earth station applications subject to this section are eligible for
   routine processing if they meet the applicable off-axis EIRP density
   envelope set forth in this section below. The terms "conventional Ku
   band" and "extended Ku band are defined in § 25.103.

   (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:
   29.5-25log10th 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:
   32.5-25log10th 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:
   29.3-10log10(N)-25log10th dBW/4 kHz For 3DEG <=th <=48DEG
   -12.7-10log10(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:
   24-25log10th 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:
   18-10log10(N)-25log10th dBW/4 kHz For 3DEG <=th <=48DEG
   -24-10log10(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:
   24-25log10th 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:
   18-10log10(N)-25log10th dBW/4 kHz For 3DEG <=th <=48DEG
   -24-10log10(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;  79 FR 8324 , Feb.
   12, 2014]

   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 3 years.

   return arrow Back to Top


Goto Section: 25.217 | 25.219

Goto Year: 2013 | 2015
CiteFind - See documents on FCC website that cite this rule

Want to support this service?
Thanks!

Report errors in this rule. Since these rules are converted to HTML by machine, it's possible errors have been made. Please help us improve these rules by clicking the Report FCC Rule Errors link to report an error.
hallikainen.com
Helping make public information public