Applications

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

Notice: Comtech EF Data reserves the right to change specifications of products described in these documents at any time without notice and without obligation to notify any person of such changes.  Information in these documents may differ from information published in other Comtech EF Data documents.