MIL-STD-188-164 Interoperability Of Shf Satellite Communications TerminalsThis standard establishes mandatory Radio Frequency/Intermediate Frequency RF/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

frequency in 4.3.1, as long as the instantaneous bandwidth does not extend beyond the band edges identified in 4.3.1.

4.3.5 Receive conversion frequency accuracy.  The down- conversion frequency accuracy shall be within 1-kHz of the intended value for all received RF carriers.  Down-conversion frequency accuracy shall be maintained for a 90-day period or more without recalibration.

4.3.6 Receive phase linearity.  The RF-to-IF phase response of the reception function shall not deviate from linear by more than the following amounts:

±   0.2 radians over any 2-MHz instantaneous bandwidth

±  0.4 radians over any 36-MHz instantaneous bandwidth

±   0.5 radians over any 72-MHz instantaneous bandwidth

±  0.6 radians over any 90-MHz instantaneous bandwidth

±  0.7 radians over any 120-MHz instantaneous bandwidth

4.3.7 Receive amplitude response.   Amplitude variations as measured at the terminal IF output (demodulator input) shall not exceed the following.

±  0.5 dB over any 10 MHz instantaneous bandwidth

±  1.5 dB over any 120 MHz or smaller instantaneous bandwidth (10 MHz < instantaneous bandwidth < 120MHz)

±  2.0 dB for each output frequency band listed in table II (NOTE: This may be exceeded if the terminal meets all

implementation loss requirements mandated by the appropriate

SSE.)

4.3.8 Receive phase noise.  The receive function shall meet phase noise requirements as defined in 4.2.11.

4.3.9 Receive spurious output.   The sum total of spurious signal power (includes phase noise) measured at the IF output shall be at least 20 dB below the thermal noise power measured in the instantaneous bandwidth supported by the IF.  No one spurious signal shall exceed -60 dBc.  The requirements of this

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