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T-740E S-Band Launch Vehicle Transmitter

The T-740E Transmitter is a rugged, flight-proven Tracking and Data Relay Satellite System (TDRSS) transmitter with successful launches on multiple launch vehicles. It provides the critical connection between a launch vehicle and NASA’s TDRSS for complete telemetry coverage during ascent and staging, alleviating dependence on downrange telemetry gathering stations.

The center frequency of the T-740E transmitter can be set across the TDRSS S-band with simple tuning changes. It uses a low-phase noise temperature-compensated crystal oscillator for the frequency source. Phase noise is less than 5° RMS under vibration conditions experienced during launch. Premodulation shaping of the data is available for optimum spectral containment.

The solid-state power amplifier (SSPA) employs high-efficiency, space-qualified gallium nitride field-effect transistor power devices to generate the 40-watt RF power. Design of the SSPA minimizes compression of the shaped signals over all environments.

Resources

  • T-740 S-Band Launch Vehicle Transmitter Sell Sheet

    T-740E S-Band Launch Vehicle Transmitter Spec Sheet

Expert Support

The T-740E is designed, built, assembled and tested all within one facility and is serviced and supported by engineering professionals with decades of spaceflight design experience. Every T-740E delivered is accompanied by domain expertise in parts, materials, radiation analysis, mechanical engineering, power supply design, digital signal processing, radio frequency design and manufacturing engineering. For most applications, existing data items can be provided for review, reducing the analysis and testing required.

Service and support technicians on the manufacturing floor

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