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

b. The single sideband phase noise due to the continuous component, when integrated over the bandwidth from 1%RS to RS hertz relative to carrier center frequency, shall be less than the value obtained when integrating the figure 1 plot over the same limits. This requirement shall be verified at the lowest and highest symbol rate. This requirement applies to all operational symbol rates (Rs).

4.2.12 Transmit thermal noise EIRP. For terminals with antenna gain less than or equal to 45 dBi, the thermal noise EIRP spectral density shall not exceed -10 dBm/Hz at X-band and

-20 dBm/Hz at Ka-band. For terminals with antenna gain greater

than 45 dBi, the thermal noise EIRP spectral density shall not exceed the value given by: -55 + Gant (dBm/Hz) at X-band and the value given by: -65 + Gant (dBm/Hz) at Ka-band. The above requirements are to be met with any one modem/upconverter string on line.

4.2.13 Transmission function extraneous outputs. With the transmission equipment aligned and the power control attenuator(s) set to provide maximum-linear power (that is, the maximum-linear power is set by using a CW signal connected into the IF interface), the EIRP of extraneous emissions as measured over any 10-kHz bandwidth shall be no greater than 37 dBm or

-60 dBc, or whichever is larger. This requirement excludes a

2-MHz band centered on the carrier.

4.2.14 Harmonic emissions. The level of all harmonics of the transmit carriers shall not exceed -60 dBc when measured at maximum-linear power.

4.2.15 Transmit-to-receive isolation. Transmit-to-receive isolation shall be such that there is less than 0.1 dB increase in receive noise density over the table II frequency band with the transmitter operating at any EIRP level, compared to the receive performance with the transmitter turned off.

4.2.16 Intermodulation products in the receive band. For all receive frequency bands of operation, the intermodulation products appearing at the low-noise amplifier (LNA) input due to two equal power transmit communications carriers shall be no greater than -135 dBm. The requirements of this paragraph shall be met with each transmit carrier at any frequency in the transmit band and the power in each carrier shall be 3 dB below maximum-linear EIRP. This requirement applies to ETs supporting multiple communication carrier transmission.