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Comtech CDM-Qx & CDM-QxL Multi-Channel


Comtech CDM‑Qx and CDM-QxL are the first satellite modems to offer DoubleTalk® Carrier‑in‑Carrier® bandwidth compression capability that allows transmit and receive carriers of a full‑duplex satellite link to share the same transponder space.

CDM-Qx & CDM-QxL Multi-Channel Satellite Modems

cdm-Qx_lrg


Applications
  • Cellular Backhaul
  • High Speed Trunking
  • Offshore Communications
  • Limited Rack Space Installations
CDM‑Qx and CDM-QxL are the first satellite modems to offer DoubleTalk®
Carrier‑in‑Carrier® bandwidth compression capability that allows transmit and receive carriers of a full‑duplex satellite link to share the same transponder space.


DoubleTalk Carrier‑in‑Carrier enables multi-dimensional optimization, thereby allowing satellite communications users to:
  • Reduce operating expenses (OPEX)
  • Increase throughput without using additional transponder resources
  • Increase availability (margin) without using additional transponder resources
  • Reduce capital expenses (CAPEX) by allowing a smaller BUC/HPA and/or antenna
  • Or, a combination to meet specific user needs
Features
  • DoubleTalk Carrier‑in‑Carrier bandwidth compression capability (option)
  • Four slot chassis, allowing flexible configuration
  • CDM‑Qx: 50 to 90, 100 to 180 MHz CDM‑QxL: 950 to 1950 MHz
  • Data Rate: 32 kbps to 20 Mbps
  • Modulation: BPSK, QPSK, 8‑PSK and 16‑QAM
  • Forward Error Correction (FEC): Viterbi, Concatenated Reed Solomon and Turbo Product Coding (IESS‑315 Compliant)
  • Data Interface: EIA‑422, V.35, Sync EIA‑232, G.703 T1, G.703 E1, Quad G.703 E1, G.703 E2 and HSSI
  • Enhanced D&I++ for Single & Quad E1
  • M&C: EIA‑232, EIA‑485, and 10/100BaseT Ethernet with SNMP, HTTP and Telnet support
  • Embedded Distant‑end Monitor and Control (EDMAC)
  • Automatic Uplink Power Control (AUPC)
  • Spectrum Analyzer Function
  • Asymmetric Loop Timing
  • Common frequency reference for all modules
  • Individual modulator output power control
  • CDM-QxL: 10 MHz reference for BUC, FSK communications and optional BUC power supply
  • CDM-QxL: 10 MHz reference and LNB power supply
  • Interoperable with many Comtech EF Data satellite modems: CDM‑550T, 570, 570L, 600, 600L, SDM‑8000, 300A, and 300L3

 



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