Comtech EF Data CDM-600 Installation And Operation Manual page 37

CDM-600 Satellite Modem
Introduction
The following table shows what other options are available:
Option
Low Rate Variable
Mid-Rate Variable
Full Rate Variable
8-PSK
16-QAM
High Rate IBS ESC
IBS
IDR
D&I
Dual Audio mode
Turbo Codec – Low Rate (1
Turbo Codec – High Rate (2
TPC / LDPC Codec
LDPC (Mid-Rate)
LDPC (High-Rate)
High Stability Reference
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
Description and Comments
Data rate 2.4 kbps to 5.0 Mbps
Data rate 2.4 kbps to 10.0 Mbps
Data rate 2.4 kbps to 20.0 Mbps
Modulation Type
(includes 8-QAM if the TPC / LDPC Codec
is installed)
Modulation Type
20 bits per Frame
Intelsat Business Services – IESS-309
Intermediate Data Rate – IESS-308
Drop and Insert (includes D&I++)
2 x 32 kbps ADPCM Audio as primary data
st
Gen) 5 Mbps TPC Codec
nd
Gen) 20 Mbps TPC Codec
20 Mbps TPC/LDPC Codec
Data rate to 10 Mbps
Data rate to 20 Mbps
Internal/External 10 MHz reference - 2 x 10
1–5
Revision 7
MN/CDM600.IOM
Option
Installation
method
BASE UNIT
FAST
FAST
FAST
FAST
FAST
FAST
FAST
FAST
FAST
Hardware
Hardware
Hardware
FAST
FAST
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Hardware