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Description
Modem Type
Transmit / Receive
Modem Configuration
Modem Type is a major change for the modem and will set the configuration to
defaults for the selected modem type. The Tx power will be turned off.
The modem types are:
OM-73
•
MIL-165A
•
IESS-308
•
IESS-309
•
IESS-310
•
TURBO
•
16QAM
•
AUPC
•
LDPC
•
The modem will use less power when using either duplex set to Mod Only, Demod
Only, or Tx Sleep mode. The power can be reduced by 5 Watts.
The Interface Type should only be set for Gigabit Ethernet. Low Voltage Differential
Signaling (LVDS) is only used at the factory during development.
As an example, Reed Solomon is available when Mil-165A is selected as the Modem
Type.
The following options configure Tx and Rx, depending on the Modem Type.
Overhead:
Adding overhead will add a small percentage of data to the symbol rate of the
modem. Automatic Uplink Power Control (AUPC) is used to manage the modem Tx
power level when the System is impaired by adverse weather conditions.
FEC Type:
The FEC Type selection is dependant on the Modem Type. Selecting Turbo as a
Modem Type will change the FEC Type to Turbo.
Reed Solomon Encoder:
Reed Solomon Is available depending on the Modem Type of the modem.
CW: Code Word, Depth:
•
The Reed Solomon Code Word and Depth is selectable using the drop-
down box.
Differential Encoder / Decoder:
The Differential Encoder is available depending on the Modem Type of the modem.
Modulation Type:
The Modulation Type can be set to BPSK, QPSK, OQPSK, 8PSK, 8QAM, or 16QAM.
This is dependent on the Modem Type and the FEC Type.
Code Rate:
The Code Rate can be set to 1/1, 1/2, 1/3, 2/3, 3/4, 7/8, .378, .451, .541, 5/16, 21/44,
and 17/18. These selections vary, depending on the Modem Type, FEC Type, and
Modulation Type.
Data Rate:
The data rate range is detailed in Appendix B.
6–14
SLM-5650C / SLM-5650C-ODU Satellite Modem
Parameters
Revision 1
MN-SLM-5650C
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