Newtec Proprietary
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R3.2_v1.0
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Feature Descriptions
MDM9000 Satellite Modem
16.6.10 Transponder Operation Mode Demodulator
MDM9000 >> Demodulator
The Transponder Operation Mode Configuration defines the satellite configuration of the link and
thereby helps the modulator and demodulator to select the right MODCODs (linear or non-linear)
and the appropriate distortion margins and ACM mechanism to be used.
Make sure that the selected operation mode is the same as the operation mode
selected on the modulator (of the sending site).
Transponder Operation
Mode
Description
Multiple Carrier per
Transponder
The multi carrier per transponder configuration is to be used in the
case the transponder is operated in multiple carriers per
transponder on the satellite.
Demodulator C/D estimate: not used
MODCOD selection: Linear MODCODs are used only
ACM Distortion Margin: 0.0 dB for all MODCODs
ACM Mechanism used: Linear Carrier is used.
Single Carrier per
Transponder – Linear
The single carrier per transponder configuration in linear mode
configuration assumes that the transponder has sufficient backoff
to be considered in linear mode with a single carrier and that the
operation is clearly within linear region of the transponder.
Demodulator C/D estimate: is used in the link.
MODCOD selection: Linear MODCODs are used only.
ACM Distortion Margin: 0.0 dB for all MODCODs.
ACM Mechanism used: Link Margin is used.
Single Carrier per
Transponder –
Non-Linear
In the case the satellite channel is operated in a single carrier per
transponder mode in the non-linear amplification region of the
transponder.
Demodulator C/D estimate: is used in the link.
MODCOD selection: Non-linear MODCODs are used only.
ACM Distortion Margin: defined in table / MODCOD.
ACM Mechanism used: Non-linear carrier is used.
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