Satellite Communications Modems

satTRAC Modems provide RF conversion and modem processing for TT&C and Payload links with support for all commonly used frequencies and waveforms.

satTRAC Modems offer extensive configurability and are compatibility tested with most GEO spacecraft buses and LEO smallsat radios.

An ethernet-attached RF digitizer connects to the modem’s software application running on commercial servers.

Configurable RF Bands

RF Digitization
(K, Ka, X, C, S, and L-bands)

Suite of Modulation and Demodulation Applications

Proven in both factory compatibility tests and on-orbit operations

Narrowband and Wideband Data Rates

Telemetry, Commanding, Ranging, and Payload

  • Signal converter technology conditions, filters, downconverts, samples, and decimates to a digitized IF over Ethernet
  • The modem’s intelligence is the satTRAC App software that performs all demodulation, modulation, and ranging computations

  • 5 Mbps Commanding Uplink
    10 Mbps Telemetry Downlink
    180 Mbps Payload Downlink

  • Server or Cloud Hosted

  • Custom Configurations

RF Conversion
L-Band
S-Band (2.1 – 2.45 GHz)
X-Band
K-Band
Protocols
TCP/UDP
CCSDS
Space Link Extension (SLE)
COP-1
HDLC
Serial PCM, Ternary, Di-Bit
Telemetry Waveforms
Subcarrier BPSK/PM
Direct PCM/PM
BPSK, QPSK, SQPSK, UAQPSK
SOQPSK, GMSK
SBW Mode 1 and Mode 2
Command Waveforms
FSK/AM (SGLS)
BPSK
PCM/PM
Subcarrier BPSK/PM
Subcarrier BPSK/FM
SBW Mode 1 and Mode 2
Satellite Ranging
PRN (SGLS)
Tone (SDIVN, USB, and ESA)
Channel Emulation
Time Delay and Doppler
Path Loss, Fading, Noise

 

Digital IF and Software Modems
A Really Basic Intro to Satellite Links (Modems)