Newtec Proprietary
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R3.2_v1.0
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Feature Descriptions
MDM9000 Satellite Modem
16.1.15 Link Optimization
16.1.15.1 Transponder Operation Mode
MDM9000 >> Modulator >> Link Optimization
The Transponder Operation Mode configuration defines the satellite configuration of the link and
thereby helps the modulator and demodulator select the right MODCODs (linear or non-linear) and
the appropriate distortion margins and ACM mechanism to be used.
Transponder Operation
Mode
Description
Multiple Carrier per
Transponder
Use this setting when the transponder is operated in multiple
carriers per transponder on the satellite.
The transponder has sufficient backoff and operates in its linear
region.
• MODCOD selection: A valid list of MODCODs is displayed,
including the specific Linear MODCODs.
Non valid MODCODs for this setting are not displayed.
Single Carrier per
Transponder – Linear
Use this setting when the transponder has sufficient backoff to be
considered in linear mode with a single carrier and that the
operation is clearly within the linear region of the transponder.
• MODCOD selection:A valid list of MODCODs is displayed,
including the specific Linear MODCODs.
Single Carrier per
Transponder –
Non-Linear
Use this when the satellite is operated in a single carrier per
transponder mode in the non-linear amplification region of the
transponder.
• MODCOD selection: A valid list of MODCODs is displayed.
Note that we do not support single carrier per
Transponder - non-linear at data rates below
22 Mbaud.
In this situation please select Multiple Carrier per
Transponder.
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