IF and associated interface requirements applicable to Satellite Communications SATCOM Earth Terminals ET operating over military X-band and Ka-band Super High Frequency SHF channels. Military unique requirements for ET that may operate over commercial C-band, Ku-band, and Ka-band are included. Equipment developers may exceed the requirements herein to satisfy specific program requirements, provided that interoperability is maintained. Thus, incorporating additional standard and nonstandard capabilities and interfaces is not precluded. Existing SHF SATCOM terminals need not conform to this MIL-STD unless they undergo a modernization program.

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MIL-STD-188-164B

3.15 Antenna Pointing loss. The antenna gain decrease due to the angular difference between the antenna boresight gain vector and the intended satellite target vector.

3.16 Reception function. The reception function receives RF signals from a satellite, provides low-noise amplification, and downconverts the RF signal to an IF signal. The reception function includes all the equipment from the RF input (including radome if used) to the IF output.

3.17 Satellite system. A communications system that includes two or more ETs, a communications satellite or a space platform, and a control system.

3.18 Saturated power. The single-carrier output power level of an active device (typically a high-power amplifier [HPA]) where the input power change-to-output power change ratio is 10:1.

3.19 Transmission function. The transmission function up- converts the IF signal to a RF signal, amplifies the RF signal, and transmits the RF signal to a satellite. The transmission function includes all the equipment from the IF input to the RF output, including radome (if used).