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CDM-600L Satellite Modem
Introduction
With the exclusive FAST technology, operators have maximum flexibility for enabling
functions as they are required. FAST allows an operator to order a modem precisely
tailored for the initial application.
1.3.3
Implementation
FAST is factory-implemented in the modem at the time of order. Hardware options for
basic modems can be ordered and installed either at the factory or in the field. The
operator can select options that can be activated easily in the field, depending on the
current hardware configuration of the modem. The Activation Procedure is described in
Appendix C.
1.3.4
Hardware Options
There are seven hardware options available. There are two Comtech EF Data Turbo
Product Codecs, and a combination TPC(Turbo) and Low-Density Parity Check (LDPC)
codec, representing a very significant development in the area of FEC. They are plug-in
daughter cards (SIMM modules), field upgradeable. The Low Rate (1
option provides data rate capability up to 5 Mbps, and code rates limited to Rate 5/16
(BPSK), Rate 21/44 (BPSK) and Rate 3/4 (QPSK, OQPSK, 8-PSK and 16-QAM). The
High Rate (2nd Generation) TPC option provides data rate capability up to 20 Mbps, in
addition to Rate 7/8 and Rate 0.95 capability. The combination Low-density Parity Check
(LDPC) and TPC Codec is capable of data rates up to 20 Mbps, and provides Rate 1/2,
Rate 2/3 and Rate 3/4 code rates across the range of modulation types.
The fourth hardware option is the Internal Reference Stability. The high stability option
includes a 2 x 10
stability option places a 1 x 10
must be fitted in the factory at the time of order.
The fifth hardware option is the Receive IF Impedance and Connector. The receive IF
may be configured with either a Type F female connector at 75Ω impedance, or a Type N
female connector at 50Ω impedance. This option must also be fitted in the factory at the
time of order.
The sixth hardware option is prime power input for the modem. The modem chassis may
be configured for either 100-240 VAC input, or 38-60 VDC input.
The seventh hardware option is an internal power supply for the BUC. This power
supply provides 24V (100W max.) or 48V (180W max.) power to the BUC on the center
conductor of the transmit cable. This hardware option can be fitted in the factory at the
time of order, or be installed in the field as an upgrade kit. The options include 100-240
VAC input, or 38-60 VDC input.
-8
10 MHz reference oscillator on the modem board, while the low
-6
10 MHz reference on the modem board. This option
1–6
Revision 2
MN/CDM600L.IOM
st
Generation) TPC
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