Chapter 1. Introduction; Figure 1-1. Cdm-600L L-Band Satellite Modem - Comtech EF Data CDM-600L Installation And Operation Manual

Chapter 1. INTRODUCTION

The CDM-600L (Figure 1-1) is an Open Network Satellite Modem, intended for both
Intelsat and closed network applications.
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It is compliant with IESS-308/309/310/315 specifications, but also adds
significant other features in closed network modes.
•
It offers variable data rates from 2.4 to 20 Mbps, in BPSK, QPSK, Offset QPSK,
8-PSK, 8-QAM and 16-QAM modes. Viterbi, Sequential, concatenated Reed-
Solomon (RS), Trellis Coded Modulation (TCM), Turbo Product Coding (TPC)
and Low-density Parity Check Coding (LDPC) are provided as Forward Error
Correction (FEC) options.
•
A full range of interface types is built in (no plug in cards required) including all
G.703 types, and Drop and Insert (both Open and Closed Network) operation
are available.
•
The IF frequency range covers 950 – 1950 MHz
•
It includes a programmable 13, 18, or 24V LNB power supply at the receive IF
connector center conductor, and optionally includes a 24 or 48V BUC power
supply at the transmit IF connector center conductor.
•
A low phase noise 10 MHz reference output is available at both the transmit and
receive IF connectors for use by the LNB or BUC.
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The modem is compact, 1U high and 18 inches deep, and consumes 57 watts
(typical) excluding BUC power supply and LNB power supply loads
•
It has a front panel VFD display and keypad for local configuration and control,
although it can be fully remote-controlled.

Figure 1-1. CDM-600L L-Band Satellite Modem

1–1
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