(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)(1) An earth station that is not subject to licensing under Sec. 25.134, Sec. 25.222, Sec. 25.226, or Sec. 25.227 may be routinely licensed for analog transmissions in the 14.0-14.5 GHz band with bandwidths up to 200 kHz (or up to 1 MHz for command carriers at the band edge) if the equivalent diameter of the transmitting antenna is 1.2 meters or greater, input power spectral density into the antenna will not exceed -8 dBW/4 kHz, transmitted satellite carrier EIRP density will not exceed 17 dBW/4 kHz, and the application includes certification pursuant to Sec. 25.132(a)(1) of conformance with the antenna performance standards in Sec. 25.209(a) and (b).
(1) An earth station that is not subject to licensing under Sec. 25.134, Sec. 25.222, Sec. 25.226, or Sec. 25.227 may be routinely licensed for analog transmissions in the 14.0-14.5 GHz band with bandwidths up to 200 kHz (or up to 1 MHz for command carriers at the band edge) if the equivalent diameter of the transmitting antenna is 1.2 meters or greater, input power spectral density into the antenna will not exceed -8 dBW/4 kHz, transmitted satellite carrier EIRP density will not exceed 17 dBW/4 kHz, and the application includes certification pursuant to Sec. 25.132(a)(1) of conformance with the antenna performance standards in Sec. 25.209(a) and (b).
(2) An earth station that is not subject to licensing under Sec. 25.134, Sec. 25.222, Sec. 25.226, or Sec. 25.227 may be routinely licensed for digital transmission, including digital video transmission, in the 14.0-14.5 GHz band if the equivalent diameter of the transmitting antenna is 1.2 meters or greater, input power spectral density into the antenna will not exceed -14 dBW/4 kHz, transmitted satellite carrier EIRP density will not exceed + 10.0 dBW/4 kHz, and the application includes certification pursuant to Sec. 25.132(a)(1) of conformance with the antenna performance standards in Sec. 25.209(a) and (b).
(d) An earth station that is not subject to licensing under Sec. 25.134 or Sec. 25.221 may be routinely licensed for digital transmission in the 5925-6425 MHz band or analog transmission in that band with carrier bandwidths up to 200 kHz (or up to 1 MHz for command carriers at the band edge) if the equivalent diameter of the transmit antenna is 4.5 meters or greater, the application includes certification pursuant to Sec. 25.132(a)(1) of conformance with the antenna performance standards in Sec. 25.209(a) and (b), and maximum power density into the antenna will not exceed + 0.5 dBW/4 kHz for analog carriers or -2.7 - 10log(N) dBW/4 kHz for digital carriers. For digital transmission with frequency division multiple access (FDMA) or time division multiple access (TDMA), N is equal to one. For digital transmission with code division multiple access (CDMA), N is the maximum number of co-frequency simultaneously transmitting earth stations in the same satellite receiving beam.
(e) An applicant for authority for an earth station in the Fixed-Satellite Service proposing to transmit digital signals or analog signals in bandwidths up to 200 kHz (or up to 1 MHz for command carriers at the band edge) and to operate with transmitted satellite carrier EIRP densities, and/or maximum antenna input power densities in excess of those specified in applicable provisions of paragraph (c) or (d) of this section or operate with a smaller antenna than specified in a relevant provision of those paragraphs must comply with the requirements in Sec. 25.218 or Sec. 25.220, unless the application is subject to licensing pursuant to Sec. 25.221, Sec. 25.222, Sec. 25.226, or Sec. 25.227.
(f) In the 24.75-25.25 GHz band, an earth station that meets the antenna gain pattern requirements set forth in Sec. 25.209(a) and (b) of this part may be routinely licensed if the maximum power density into the antenna does not exceed 3.5 dBW/MHz. [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; 72 FR 50030, Aug. 29, 2007; 73 FR 70902, Nov. 24, 2008; 78 FR 8428, Feb. 6, 2013; 79 FR 8323, Feb. 12, 2014]