Comtech EF Data SDM-300L - Manual (Page 16)

SDM-300L Satellite Modem Introduction
Rev. 2 1–5
1.3 Specifications
Refer to Table 1-3 for general specifications.
Table 1-3. General Specifications
Specification (Fully Enhanced)
Digital Interface (Standard) EIA-232, EIA-422, and V.35 (25-pin D)
Digital Data Rate 2.4 kbit/s to 4.375 Mbit/s, in 1 bit steps
Note: In some applications the practical lower data rate is
typically 19.2 kbit/s or higher., depending upon the performance
of equipment used in conjunction with the
SDM-300L. These applications include the use of a BUC
or a LNB.
Symbol Rate 4.8 ksym/s to 2.5 Msym/s
Modulation/Demodulation BPSK 1/2 Rate
QPSK 1/2, 3/4, and 7/8 rate
OQPSK 1/2, 3/4, and 7/8 rate
Plesiochronous Buffer 2 to 99 msec, in 2 msec steps to 2.6 Mbit/s
32 to 262122 bit/s in 16 bit steps
Forward Error Correction (FEC) Viterbi, K =7, 1/2, 3/4, and 7/8 rate
Sequential 1/2, 3/4, and 7/8 rate
Reed-Solomon
Data Scrambling IESS-308 (V.35) or None
External Reference Input EXT 1, EXT 5, EXT 10, and EXT 20 MHz
External Reference Output Level
(Sourcing) 10 MHz, 0 to +10 dBm