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CDM-Qx Satellite Modem Revision 5
Introduction MN/CDMQx.IOM
1–2
1.2 Features
The Modem includes such features as the following:
• DoubleTalk™ Carrier-in-Carrier® allowing Tx and Rx carriers of a full-duplex
link to use the same transponder segment
• CDM-Qx: 50 to 90 and 100 to 180 MHz frequency range
• CDM-QxL: 950 MHz-1950 MHz L-band
• 32 kbps to 20 Mbps
• BPSK, QPSK, 8-PSK, 16-QAM operation
• Flexible Configuration:
• 1 modem or 2 modems configured as 1:1
• Up to 4 demodulators
• Optional Built In Redundancy:
• 1:1 modem
• Up to 1:3 modulator
• Up to 1:3 demodulator
• EIA-422/-530, V.35, G.703 (E1/T1) and HSSI Interfaces
• 1 to 4 Ports of G.703 (E1 with D&I ) Quad E1 Interface Card
• 10/100 BaseT Ethernet, RS-232 or RS-485 for M&C remote control
• Forward Error Correction (FEC) choices included:
• Viterbi
• Viterbi with Reed-Solomon
• Trellis and Reed-Solomon
• Optional, 2
nd
Generation Turbo Product Coding (TPC)
(IESS-315 compliant)
• Fully Accessible System Topology (FAST)
• Asymmetric Loop Timing
• Common frequency reference for all modules
• Optional High Stability Reference
• Optional Redundant Power Supply
• Individual or summed Modulator output power control
• Interoperable with: CDM-550T, -570L, -600, -600L, SDM-300A, -300L3, and
-8000 modems (in compatible modes)
• Drop and Insert, closed network version
• FSK, for communicating to Comtech EF Data transceivers
• EDMAC, Automatic Uplink Power Control