Comtech EF Data CDM-425, Installation And Operation Manual

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CDM-425 Advanced Satellite Modem
Revision 0
Introduction 1–2 MN-CDM-425
•
It supports an entirely new family of waveforms – VersaFEC and VersaFEC-2® that are
optimized for both ACM and CCM operations. A total of 92 Modcods are offered,
providing a toolbox that permits a user to optimize power efficiency, spectral efficiency,
latency, or a combination of all three.
•
It offers variable data rates, from 18 kbps to 25 Mbps, in BPSK, QPSK, 8-QAM, 8-ARY,
16-QAM, 16-ARY, and 32-ARY modes.
•
It supports a complete range of transmit filter options (spectrum shaping). Transmit
alphas of 0.05, 0.10, 0.15 0.20, 0.25 and 0.35 are included, which in turn permits you to
reduce channel spacing as transmit alpha (and hence occupied bandwidth) reduces,
providing potentially significant gains in transponder bandwidth efficiency. See
Appendix
N. TRANSMIT SPECTRUM FILTERING OPTIONS for important information about these
options.
•
Its demod design incorporates fast acquisition, optimal composite power handling.
•
It includes VersaFEC and VersaFEC-2 Adaptive Coding and Modulation in the base
hardware to increase capacity on IP links.
•
It includes DoubleTalk
®
Carrier-in-Carrier
®
in the base hardware, and no longer requires
a separate plug-in card. (However, FAST codes are still required to activate this option.)
•
It can be equipped with an optional IP Packet Processor card that, in addition to providing
Layer 3 functionality, incorporates a number of key features for Wide Area Network
(WAN) bandwidth optimization: very low overhead Streamline Encapsulation (SLE),
Header and Payload Compression, Advanced Quality of Service (QoS), and Advanced
Encryption Standard (AES) Encryption.
•
IEEE-1588v2 Precision Timing Protocol (PTP) and Jumbo Frame Support are available
options.