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
Applications
- Cellular Backhaul
- High Speed Trunking
- Offshore Communications
- Limited Rack Space Installations
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
- 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
