Multi-Mode Standard Transponder (MST)

Affordable, Compact S-Band Transponder

The Multi-Mode Standard Transponder (MST) provides compatibility with a variety of government and commercial telemetry and command formats in a single unit at an affordable price. Available receive modes include NASA’s Tracking and Data Relay Satellite System (TDRSS), NASA’s traditional STDN ground network format, AFSCN SGLS and Unified S-Band, and a direct carrier BPSK mode compatible with commercial services and the NASA Ground Network (GN).

  • Mission ready: Five different models support a wide range of customer requirements
  • Secure: Compatible with commercial and NSA certified encryption products
  • Flexible: Customer specific requirements and options are available

Product Details

Features

The Multi-Mode Standard Transponder (MST) uses modern integrated circuit technology for reduced size and cost. The MST delivers the best value by providing the highest performance and reliability in a low cost fully coherent TT&C transponder for space. Available receive modes include NASA's TDRSS, NASA's traditional STDN ground network format (also compatible with AFSCN Unified S-Band), and a direct carrier BPSK mode compatible with commercial services and some NASA ground assets.

Receiver Features

  • Operating modes include:
    • TDRSS
    • Direct Carrier BPSK
    • BPSK Modulated Command Subcarrier Linearly Phase Modulated on the Carrier
    • SGLS/AFSCN including Ternary FSK
    • Multiple Mode Operation Available in a Single Unit
  • Noise Figure: < 2.5 dB
  • Frequency Stability: < 0.5 ppm, 0 to +50º C
  • Operating Frequency: USB = 2025 to 2120 MHz, SGLS = 1760 to 1840 MHz
  • Data Rates up to 20 Mbps
  • Acquisition:
    • TDRSS: Doppler Compensated
    • GN: Ground Sweep or Auto-acquisition

Transmitter Features

  • PN Spread Modes are Compatible with TDRSS
  • BPSK, QPSK, Linear Modulation and Subcarrier Modulation Modes
  • Frequency Stability: < 0.5 ppm,0 to +50º C
  • Operating Frequency: 2200 to 2300 MHz
  • Data Rates: up to 20 Mbps
  • Digital Filtering for Spectral Containment
  • Power Amplifier Can be Remotely Mounted Near the Antenna to Minimize RF Losses
  • Can be configured as a noncoherent transceiver or a coherent transponder

Specifications

 

Multi-Mode Standard Transponder (MST) Data Sheet

 

 

View Data Sheet For All Models

 

Receiver Operating Modes TDRSS, Direct Carrier BPSK, ƒ BPSK Modulated Command Subcarrier Linearly Phase Modulated on the Carrier, SGLS/AFSCN including Ternary FSK, ƒMultiple Mode Operation Available in a Single Unit
Size 9.40” x 7.30” x 2.30”
Weight < 6.0 lbs (2 Module Integrated Unit, including optional 8W PA)
EMI/ EMC MIL-STD-461C
Radiation 100 kRad
Vibration 25 Grms
Shock 3000 G peak, 1300 Hz
Temperature -34º C to +71º C