Comtech EF Data CDM-600 Uživatelský manuál stáhnout pdf (Strana 1)

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Satellite Modems

CDM-600 & CDM-600L Open Network

Satellite Modems

Overview

The CDM-600 and CDM-600L are open network satellite modems, which are fully compliant with IESS-308,

-309, -310, -314, and -315 from 64 kbps through T2 and E2. They are available in the following three data

rate ranges:

Low-Rate variable: 2.4 kbps to 5.0 Mbps

Mid-Rate variable: 2.4 kbps to 10.0 Mbps

High-Rate variable: 2.4 kbps to 20.0 Mbps

In addition, both modems operate in closed network from 2.4 kbps to 20 Mbps. The modems include T1,

E1, T2, and E2 G.703 interfaces, in addition to EIA-422, V.35, EIA-232, and serial LVDS. HSSI is provided

by adding the CIC-20 interface converter. The architecture is firmware and FPGA-based, and the internal

Flash memory allows easy updating via the serial port. The modems offer exceptional flexibility and

performance in 1RU enclosures.

Features

• CDM-600: 50 to 90 or 100 to 180 MHz IF range

CDM-600L: 950 to 2000 MHz IF range

• Fast acquisition demodulator (± 32 kHz

acquisition range, 64 kbps, Rate 1/2 QPSK: 1 sec

average)

• BPSK, QPSK, OQPSK, 8-PSK, 16-QAM

modulation types

• Patented 8-QAM for LDPC

• Data rate range from 2.4 kbps to 20 Mbps

• Forward Error Correction choices include Turbo

Product Coding (IESS-315 compliant), Viterbi,

Sequential, Reed-Solomon, LDPC and TCM

•

Intermediate Data Rate (IDR)

• Intelsat Business Services

• D&I++

• ESC++

• Automatic Uplink Power Control (AUPC)

• Embedded Distant-end Monitor and Control

(EDMAC)

• Asymmetric loop timing

• CDM-600: 50 or 75 Ω, front panel selectable

CDM-600L: transmit 50 Ω, receive 50 or 75 Ω, female Type N connector

• Open network compatible and backwards compatible with the CDM-

500/CDM-550, and CDM-550T

• Interoperable with SDM-300A, SDM-300L3 (CDM-600L only)

• 1:1 and 1:10 redundancy switch available

Feature Enhancements

Enhancing the modem’s performance is easy. Additional features are added quickly on site, using FAST access codes purchased from

Comtech EF Data. To enable these features, simply enter the code at the front panel.

Turbo Product Coding

The modems offer all traditional FEC methods and incorporate an optional Turbo Product Codec (TPC). TPC is a FEC technique that

delivers significant performance improvement when compared to Viterbi with concatenated Reed-Solomon. TPC simultaneously offers

increased coding gain, lower decoding delay and significant bandwidth savings.

Two TPC codecs are offered as hardware options:

• The Low-Rate TPC codec operates up to 5 Mbps with limited code rates.

• The High-Rate TPC codec operates up to 20 Mbps, and offers a full range of code rates (5/16 through 7/8, and 0.95) with all

modulation types from BPSK to 16-QAM

Typical Users

• Satellite Service

Providers

• Telecom Service

Providers

• Broadcasters

• Offshore

• Enterprise

Common Applications

• Cellular Backhaul

• G.703 Trunking

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Satellite Modems 1

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Strany 1 - Satellite Modems

www.comtechefdata.com Satellite Modems CDM-600 & CDM-600L Open Network Satellite Modems Overview The CDM-600

Strany 2

Specifications Frequency Range CDM-600: 50 to 90 or 100 to 180 MHz, CDM-600L: 950 to 2000 MHz, 100 Hz freq

Strany 3

ESC Specifications IDR (Total Overhead 96 kbps) Voice Orderwire Data Orderwire Backward Alarms 2 ADPCM (input: 4-wire VF), or 64 kbps data 8 kbps

Strany 4

Environmental & Physical Temperature Operating: 0 to 50°C (32 to 122°F) Storage: -25 to 85°C (-13 to 185°F) Power Supply 100 to 240 VAC, 50/60 H

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