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SDM-300A Satellite Modem
1.2
Options
Refer to Table 1-1 for available options.
50Ω IF Impedance
-20 to +5 dBm IF output
Sequential or Viterbi Codec
Reed-Solomon Codec
8PSK, 2/3 rate, IESS-310
8PSK, 2/3 rate, EFD Mode
Asynchronous Interface
IBS and IDR Interface
Drop & Insert Interface
EIA-422/EIA-449 Interface
48 VDC Input Power
Single Data/Code Rate
≤ 512 kbit/s maximum data rate
≤ 5.0 Mbit/s maximum data rate
High Stability Reference. Internal
stability = ± 0.2 PPM, with the ability
to drive out the external reference
connector
Asymmetrical Loop Timing (SCT)
TX Only
RX Only
Mux
Flex Mux
Rev. 4
Table 1-1. Options
Option
-20 dB return loss 50 to 180 MHz
Output 2nd Harmonics: < 45 dBc at data rates < 64 kbit/s
Modem can be supplied with either:
Concatenates with Viterbi or Sequential
Requires Viterbi and Reed-Solomon Codec
Requires Viterbi Codec
Includes automatic uplink power control (AUPC)
Available in:
Requirements
< 50 dBc at data rates ≥ 64 kbit/s
•
Viterbi
•
Sequential
•
Viterbi and Sequential
4-Channel
8-Channel
Introduction
1–7
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