ComStream CM601, Installation And Operation Manual

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Features 01-0799-401D 08/02 1
1 Overview
This manual describes the installation, operation and specifications of both the
Standard Speed and Low Speed Modem cards. Both cards are virtually identical in
operation, except for the maximum data rate limitation on the Low Speed Modem
Card, which is noted in this manual.
The Modem card is a Field Replaceable Unit (FRU) that can be easily added and
configured without returning the chassis to the factory.
Features
The Modem card is a single-board, variable rate, digital satellite modem designed
for the Radyne ComStream CM701 or CM601A chassis. The Modem card is
shipped with the following features:
■
On-board modulator and demodulator, with programmable data rates from
9.6 kbps to 4.375 Mbps on the Standard Modem card and 9.6 kbps to
512 kbps on the Low Speed Modem card
■
On-board, auto-sensing (with supplied cable) RS-530, V.35, and RS-232
combined interface port
■
Built-in BER test suite
■
Built-in Doppler Buffer
■
IntelSat Viterbi FEC, Sequential FEC, and Uncoded modes
■
QPSK and BPSK modulation
■
Open/closed network and option card compatibility
■
Hot Plug/Pull chassis card addition and removal (where indicated)
■
Fast, easy on-site configuration changes and troubleshooting
Functional
Description
The Modem card is designed with on-board I/O module, doppler buffer,
demodulator (demod) and modulator (mod).
Figure 1-1 illustrates the Modem card operation in the data processing path of the
CM701/CM601A.