Cdm-710 Broadcast Satellite Modem Features; Physical Description - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Introduction
1.3

CDM-710 Broadcast Satellite Modem Features

1.3.1

Physical Description

Constructed as a 1RU-high rack-mount chassis, the CDM-710 can be free-standing if desired.
Handles at the front facilitate removal from and placement into a rack.
The operator may configure and monitor the CDM-710 from the front panel, or through the
remote M&C port. Control and status is provided through the RS-232, RS-485 (2Wire or 4Wire)
port or 10/100 Base-T Ethernet port. The management Ethernet port supports SNMP, Telnet and
HTTP (Web browser) operation.
The CDM-710 is physically comprised of several main card assemblies:
•
The Data Interface card is a plug-in module that is readily installed or removed at the rear
of the unit.
Note: Power must be turned off to remove or install the data interfaces. Any attempt to
remove or install a data face without first turning off the power to the unit will result in
damage to the data interface.
•
The Framer Card receives signals from the data interface card and routes signals to the
FEC Encoder and Modulator. The microcontroller for the unit also resides on the Framer
Card and is the embedded controller for the entire modem. The microcontrollers handle
all of the monitor and control for the unit including the front panel keypad and display,
the RS-232 and RS-485 2Wire/4Wire remote port, and the 10/100 Ethernet port. Interface
with the other the modules in the modem is provided by the framer assembly.
•
The FEC Encoder card is a plug-in module that resides on the Framer card. It generates
the encoded stream used by the modulator card.
•
The Modulator card plugs into the framer card. It maps and spectrally shapes the I&Q
data for delivery to the IF interface.
•
The Demodulator card also plugs into the framer. It recovers the selected carrier,
performs error correction and delivers data stream to the framer card.
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