Comtech EF Data CDM-600 Bedienungsanleitung PDF herunterladen

Modems

CDM-Qx & CDM-QxL Multi-Channel

Satellite Modems with

DoubleTalk

Carrier-in-Carrier

Overview

The CDM-Qx and CDM-QxL Multi-Channel Satellite Modems offer DoubleTalk

Carrier-in-Carrier

bandwidth compression capability, allowing 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

• 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, 8PSK and 16-QAM

• Forward Error Correction (FEC): Viterbi, Concatenated Reed Solomon and Turbo Product Coding

(TPC) (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 10/100Base-T Ethernet with SNMP, HTTP and Telnet support

Typical Users

• Satellite Service

Providers

• Fixed Line Operators

• Service Providers

• Government & Military

• Enterprise

• Oil Field Service

Providers

Common Applications

• Cellular Backhaul

• G.703 Trunking

• Offshore & Maritime

Communications

• 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

Turbo Product Coding

The CDM-Qx/QxL offer 2

generation Turbo Product Codec as an option. TPC provides increased coding gain with low decoding delay.

Combined with DoubleTalk Carrier-in-Carrier, they provide unprecedented savings in transponder bandwidth and power utilization as well

as earth station BUC/HPA size.

QUAD E1 Interface (QDI) with Enhanced D&I++

The CDM-Qx/QxL supports a Quad E1 interface that can aggregate up to four synchronous full or fractional E1s into a single carrier, with

very low overhead. This provides significant CAPEX savings by reducing the number of modems and the simultaneous reduction in

BUC/HPA size due to the elimination of multi-carrier backoff.

A proprietary, closed network Drop & Insert (D&I++) allows for Dropping or Inserting any combination of 1 to 31 Time Slots on each E1.

D&I++ is supported for E1-CCS only.

1 2 3 4

Inhaltsverzeichnis

Seite 1 - Carrier-in-Carrier

ModemsCDM-Qx & CDM-QxL Multi-Channel Satellite Modems with DoubleTalk® Carrier

Seite 2 - Monitoring & Control

Doubletalk Carrier-In-Carrier DoubleTalk Carrier-in-Carrier is based on patented bandwidth compression tec

Seite 3 - Specifications

Feature Enhancements Enhancing the capability of CDM-Qx/QxL in the field is easy.

Seite 4

FEC, Modulation & Data Rate Su

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Comtech EF Data CDM-600 Bedienungsanleitung

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