AN/TSC-154 – SMART-T Mobile Satellite terminal

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SMART-T is a MILSTAR satellite-compatible communications terminal mounted on a High Mobility Multi-Purpose Wheeled Vehicle (HMMWV). The terminal provides voice and data communications at Low to Medium Data Rates (LDR/MDR). The terminal transmits in EHF and receives in SHF. It allows long-haul tactical communications for Digital Transmission Groups (DTG), Digital Subscriber Voice Terminal (DSVT), and individual encrypted subscribers, at data rates ranging from 75 bps to 1.544 Mbps. The terminal supports an aggregate data rate of 2240 kbps with a maximum data rate of 2400 bps for LDR communications and a maximum data rate of 2240 kbps for MDR communications. SMART-T is compact, utilizing an offset-fed Gregorian antenna with a 4.5-foot (1.4 m) composite reflector. A similar configuration, utilizing larger version (START-T) offers three-band communications capability.