Comtech EF Data SDM-300A - Manual (Page 32)

SDM-300A Satellite Modem Revision 6
Introduction MN/SDM300A.IOM
1–6
1.2 Options
Table 1-1. Options
Option Decsription & Comments
50 Ω IF Impedance -20 dB return loss 50 to 180 MHz
-20 to +5 dBm IF output Output 2 nd Harmonics: < 45 dBc at data rates < 64 kbps
< 50 dBc at data rates ≥ 64 kbps
Sequential, Viterbi,
Reed-Solomon or
Turbo Product Codec
Notes:
R-S concatenates with Viterbi or Sequential
ONLY.
For Turbo, Revision C (or later) main board is
required.
Modem can be supplied with any combination of:
• Sequential
• Viterbi
• Reed-Solomon
• Turbo
OQPSK
8-PSK, 2/3 rate, IESS-310 Requires Viterbi and Reed-Solomon Codec
8-PSK, 2/3 rate, EFD Mode Requires Viterbi Codec
8-PSK, 3/4 rate, Turbo Requires Turbo Product Codec
Asynchronous Overhead Includes automatic uplink power control (AUPC)
IBS and IDR Overhead
Drop & Insert Overhead
RS-422/RS-449 Interface
48 VDC Input Power
Single Data/Code Rate
≤ 512 kbps maximum data rate
≤ 5.0 Mbps maximum data rate
High Stability Reference Internal stability = ± 0.2 PPM, with the ability to drive out the external reference
connector
Asymmetrical Loop Timing (ASLT)
Transmit Only
Receive Only
Mux Available in: 4- or 8-Channel
Flex Mux
Eurocomm Interface Requires Overhead Card
G.703 Interface with DB-15 and BNC (Closed
Network) Requires Overhead Card
2 x ADPCM Voice in 64 kbps IBS Frame Requires Overhead Card
RS-530 Interface
RS-232 Interface
V.35 Interface
High Stability Internal Clock Stability ± 2 x 10 -7
IESS-315 Srambling Turbo Mode