Comtech EF Data CDM-Qx, Инструкция по установке и эксплуатации

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CDM-Qx Satellite Modem Revision 6
Introduction MN/CDMQx.IOM
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:
o
1 modem or 2 modems configured as 1:1
o
Up to 4 demodulators
•
Optional Built In Redundancy:
o
1:1 modem
o
Up to 1:3 modulator
o
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:
o
Viterbi
o Viterbi with Reed-Solomon
o Trellis and Reed-Solomon
o 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
•
EDMAC, Automatic Uplink Power Control
1.2.1 DoubleTalk™ Carrier-in-Carrier
®
Designed for bandwidth compression, Carrier-in-Carrier is based on Applied Signal
Technology’s DoubleTalk which uses “Adaptive Cancellation,” a patented (Unites States
Patent # 6,859,641) technology that allows full duplex satellite links to transmit
concurrently in the same segment of transponder bandwidth. Available as an option to
the modem, this added dimension can result in a significant improvement in satellite
transponder utilization.
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