Comtech EF Data CDM-600/600L - Manual (Page 38)

CDM-600/600L Open Network Satellite Modem Revision 3
Introduction MN/CDM600L.IOM
1–10
1.3.6 Hardware Options
1.3.6.1 CDM-600L Hardware Option
There are seven hardware options available for the CDM-600L:
• The first three comprise including two Comtech EF Data Turbo Product Codecs, and a
combination TPC (Turbo) / Low-Density Parity Check (LDPC) Codec that represents a
very significant development in the area of FEC. All three options are field upgradeable,
plug-in daughter cards (SIMM modules).
o
First, the Low Rate (1 st
Generation) TPC 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).
o
Second, 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.
o
Third, 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
-8
10 MHz reference oscillator on the modem board, while the low
stability option places a 1 x 10
-6
10 MHz reference on the modem board. This option must
be fitted in the factory at the time of order.
• The fifth hardware option is the Rx IF Impedance and Connector. The Rx IF may be
configured with either a Type F female connector at 75
Ω impedance, or a Type N female
connector at 50
Ω 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 Tx 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.
1.3.6.2 CDM-600 Hardware Options
There are four hardware options available for the CDM-600:
• The first three comprise including two Comtech EF Data Turbo Product Codecs, and a
combination TPC (Turbo) / Low-Density Parity Check (LDPC) Codec that represents a
very significant development in the area of FEC. All three options are field upgradeable,
plug-in daughter cards (SIMM modules).
o
First, the Low Rate (1 st
Generation) TPC 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).