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CDM-600 Satellite Modem Revision 7
Introduction MN/CDM600.IOM
1–5
The following table shows what other options are available:
Option Description and Comments
Option
Installation
method
Low Rate Variable Data rate 2.4 kbps to 5.0 Mbps BASE UNIT
Mid-Rate Variable Data rate 2.4 kbps to 10.0 Mbps FAST
Full Rate Variable Data rate 2.4 kbps to 20.0 Mbps FAST
8-PSK Modulation Type
(includes 8-QAM if the TPC / LDPC Codec
is installed)
FAST
16-QAM Modulation Type FAST
High Rate IBS ESC 20 bits per Frame FAST
IBS Intelsat Business Services – IESS-309 FAST
IDR Intermediate Data Rate – IESS-308 FAST
D&I Drop and Insert (includes D&I++) FAST
Dual Audio mode 2 x 32 kbps ADPCM Audio as primary data FAST
Turbo Codec – Low Rate (1
st
Gen) 5 Mbps TPC Codec Hardware
Turbo Codec – High Rate (2
nd
Gen) 20 Mbps TPC Codec Hardware
TPC / LDPC Codec 20 Mbps TPC/LDPC Codec Hardware
LDPC (Mid-Rate) Data rate to 10 Mbps FAST
LDPC (High-Rate) Data rate to 20 Mbps FAST
High Stability Reference Internal/External 10 MHz reference - 2 x 10
-8
Hardware
In order to operate in Turbo (TPC) Mode:
To operate in the the Low Rate range (up to 5 Mbps), the modem requires any of the
three Codec cards to be installed.
To operate in the Mid- or High-Rate ranges (up to 10 or 20 Mbps), the modem requires
either the High Rate TPC Codec or the TPC / LDPC Codec to be installed.
In order to operate in LDPC Mode:
The unit will require the TPC/LDPC Codec to be installed. In the base configuration this
will provide LDPC up to 5 Mbps. In order to operate at higher data rates, there are two
additional FAST options available that permit operation up to 10 Mbps or 20 Mbps. Note
that these are in addition to the base modem rate options.
In order to operate in 8-QAM mode:
The modem will require the TPC/LDPC Codec to be installed and have the 8-PSK / 8-
QAM FAST option enabled.
For example, if LDPC operation at 20 Mbps, 8-QAM mode is required, the modem must
be configured with the following:
• TPC/LDPC Codec hardware option
• Full rate variable FAST option
• High-Rate LDPC FAST option
• 8-PSK /8-QAM FAST option