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Chapter 1. INTRODUCTION
The SDM-300L3 Satellite Modem is designed to meet the requirements of the Satellite
Digital Communications industry. The modem is a high performance, full duplex modem
compliant with IESS-308/309/310/315, FDC, and V.35 specifications, but also adds
significant other features in Closed Network modes. It offers variable data rates from 2.4
kbps to 5.0 Mbps, in BPSK, QPSK, Offset QPSK, and 8-PSK. Viterbi, Sequential,
concatenated Reed-Solomon (R-S), Trellis Coded Modulation (TCM), and Turbo Product
Coding (TPC) are provided as Forward Error Correction (FEC) options. EIA-232, EIA-
422, G.703, and V.35 (25-pin) interface types are available. The range of IF frequency
simultaneously covers 950 to 1750 MHz.
Burst Modulator Operation: 19.2 kbps and/or 57.6 kbps 1/2 rate QPSK
SDM-300L3
Satellite Modem
1–1
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