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

rubber in accordance with the following:

(1) Density-- 498.28 to 747.43 kg/cubic meter

(0.018 to 0.027-lbs/cubic inch)

(2) Compression deflection-- 4218 to 9843 kg per square meter (6 to 14 pounds per square inch (psi) for 25% deflection

The shock shall be produced by releasing the hammer to

swing freely through a 90-degree arc and to impact the enclosure at the bottom of its swing.

5.6 ET control and monitoring function. The ET shall meet the following requirements.

5.6.1 Control and monitoring parameters. As a minimum, remote and local Control, Monitor, and Alarm (CMA) shall be provided in accordance with table III. For all earth terminal types, the composite and individual transmit carrier power shall be measured at the antenna feed for monitoring and reporting antenna feed power and EIRP. Antenna feed power may be computed from measured HPA output power.

The transmit gain, as computed, shall be within ± 2 dB of actual gain, neglecting any frequency dependencies in accordance with 4.2.8. Transmit gain is computed by adding (1) the upconversion function gain, (2) the gain/loss from the upconversion function output to the power amplifier input, (3) the power amplifier gain, and (4) transmission loss to antenna feed. The receive gain, as computed, shall be within ± 5 dB of actual gain. Receive gain is computed by adding (1) the gain from the LNA input to the down-conversion function and (2) the down-conversion function gain.

5.6.2 Control response times. The ET shall meet a response time of 0.5 second for all parameters in table III.

5.6.3 ET remote control and monitoring interface. This interface shall be implemented as an IEEE 802.3 compliant Ethernet. The interface protocol shall be via the industry standard simple network management protocol (SNMP).