Comtech EF Data CDM-800 Spezifikationen PDF herunterladen (Seite 22)

CDM-800 Gateway Router Revision 1

Introduction MN-CDM800

1–2

The CDM‐800 features two 10/100/1000 Gigabit Ethernet (GigE) interfaces, one 10/100 Fast

Ethernet (FE) interface, and provides WAN bandwidth optimization. The unit also features

DVB‐S2FECcoding.



• Sect.1.3CDM‐800Features

• Sect.1.4CDM‐800Specifications

1.2 CDM-800 Functional Description

TheCDM‐800GatewayRouter:



• Is compatiblewith Comtech EF Data’s CDM‐840 Remote Router for Variable Coding and

Modulation(VCM)operation.



• Features a high performance processor and a real‐time operating  system (RTOS)

combinedwithmultipleFieldProgrammableGateArrays(FPGAs).



• Runs on an embedded operating sys

tem in

 non‐volatile Flash memory. It does not have

movingpartsformediastorage.



• Supportsreceptionandtransmissionof IPdataoversatellitelinksvia twofundamentally

differenttypesofinte rfac e –IF anddata:



o TheIFinterfaceprovidesuplinkconnectivitywiththesatellite.



o Theda

tainte

rfaceisabidirectionalpaththatconnectsthecustomer’sequipment

(assumedtobetheDataTerminalEquipment,orDTE)totheunit(assumedtobe

the Data Communicati ons  Equipment, or DCE). All terrestrial data is connected

usingtheavailable10/100/1000GigabitEthernetinterface.



DVB‐S2Transmitter:TheCD

M‐800’smodulatorsupportsenhancedGSEencapsulationandlabel

filteringinsertionforupto2,047uniquelabels.ItsupportsDVB‐S2QPSK,8‐PSK,16‐APSKand32‐

APSK modulation up to 62 Msps with transmit data rates up to 160 Mbps depending on the

modulationtypeandcoderate,



In DVB‐S2 op

eration, the transmitter operates in the VCM mode. The receive modem

automatically detects for spectral inversion pilots ON/OFF, spectral rolloff of 20%, 25% or 35%,

frame size NORMAL/SHORT, and can also be configured to automaticall y  detect the modulation

coding(MODCOD).



• Sect.1.3CDM‐800Features

• Sect.1.4

CDM‐800Specifications

• AppendixB.FEC(FORWARDERRORCORRECTION)



Theunitismanagedthroughmultiple interfacesprovidingoptionsforbothin‐bandandout‐of‐

bandmonitorandcontrol:

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