Sec.  25.214   Technical requirements for space stations in the satellite digital
audio radio service.

   (a) Definitions.

   (1) Allocated bandwidth. The term “allocated bandwidth” refers to the entry
   in the Table of Frequency Allocations of a given frequency band for the
   purpose of its use by one or more terrestrial or space radiocommunication
   services under specified conditions. This term shall be applied to the
   2310–2360 MHz band for satellite DARS.

   (2) Frequency Assignment. The term “frequency assignment” refers to the
   authorization given by the Commission for a radio station to use a radio
   frequency or radio frequency channel under specified conditions. This term
   shall be applied to the two frequency bands (A) 2320.0–2332.5 MHz and (B)
   2332.5–2340.0 MHz for satellite DARS.

   (b) Each system authorized under this section will be conditioned upon
   construction, launch and operation milestones as outlined in  Sec. 25.144(b). The
   failure to meet any of the milestones contained in an authorization will
   result in its cancellation, unless such failure is due to circumstances
   beyond the licensee's control or unless otherwise determined by the
   Commission upon proper showing by the licensee in any particular case.

   (c) Frequency assignments will be made for each satellite DARS system as
   follows:

   (1) Exclusive satellite DARS licenses are limited to the 2320–2345 MHz band
   segment of the allocated bandwidth for satellite DARS;

   (2) Two, 12.5 MHz frequency assignments are available for satellite DARS:
   2320.0–2332.5 MHz and 2332.5–2345.0 MHz;

   (3) Satellite DARS licensees may reduce their assigned bandwidth occupancy
   to provide telemetry beacons in their exclusive frequency assignments;

   (4) Each licensee may employ cross polarization within its exclusive
   frequency assignment and/or may employ cross polarized transmissions in
   frequency assignments of other satellite DARS licensees under mutual
   agreement with those licensees. Licensees who come to mutual agreement to
   use cross-polarized transmissions shall apply to the Commission for approval
   of the agreement before coordination is initiated with other administrations
   by the licensee of the exclusive frequency assignment; and

   (5) Feeder uplink networks are permitted in the following Fixed-Satellite
   Service frequency bands: 7025–7075 MHz and 6725–7025 MHz (101 ° W.L. orbital
   location only).

   [ 62 FR 11106 , Mar. 11, 1997]