25.215—Technical requirements for space stations in the Direct Broadcast Satellite Service.
In addition to § 25.148(f), space station antennas operating in the Direct Broadcast Satellite Service must be designed to provide a cross-polarization isolation such that the ratio of the on-axis co-polar gain to the cross-polar gain of the antenna in the assigned frequency band shall be at least 30 dB within its primary coverage area.
[67 FR 51114, Aug. 7, 2002]