The Fairchild Data SM2800 BPSK/QPSK Satellite Modem interfaces with 70 or 140 MHz IF Satellite
Communications equipment to facilitate the transmission and reception of satellite-relayed digital data.
The Modem is designed to operate in low-cost SCPC configuration data links. It accommodates data rates
ranging from 9.6 Kbps to 2048 Kbps using 112 or 314-rate encoding and BPSK or QPSK modulation. V.35 and RS422 data interfaces are available and are fieldchangeable.