Newtec Proprietary
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Features Descriptions M6100 Broadcast Satellite Modulator
For correct Equalink usage, it is important that the modulator settings match the
Equalink applicability parameters. If this is not the case, then restart the calibration
procedure. As expert user it is possible to enter Equalink settings manually allowing to
overrule the results from the calibration procedure and setting the (non)-linear
calibration flag.
• Enable or disable the stored linear- and/or the non-linear predistortion.
• Read out the state of the predistortion.
The predistortion parameter can be enabled and the predistortion state can be off.
This is the case when the operator needs to perform tests by sending a pure carrier.
This test case automatically switches off the predistortion parameter.
The Non-Linear Info: indicates if the non-linear predistortion is loaded or not.
Before enabling linear Equalink, check the following:
• Modulator Output frequency and Modulator symbol rate values must match with the
corresponding Equalink applicability parameters. This should be the case if the calibration
procedure was applied;
• Roll-off factor of the modulator = max 20% (so it must be 5%, 10%, 15% or 20%).
Or if the applicable roll-off = 20%, the roll-off of the modulator should be ≤ 20%.
Before enabling non-linear Equalink, check the following:
• The 'transponder operational mode' parameter in the Link Optimization Table must be set to
'single carrier per transponder - Non-linear'
• Modulator output frequency value must match with the corresponding calculated Equalink
applicability parameter;
• If Equalink version is ≥ 2, then the modulator symbol rate must be ≥ 22 Mbaud;
As the Equalink applicability parameters must match the corresponding modulator
settings, it is advised not to change the modulator parameters when Equalink is
enabled. Doing so will result in error messages, blocking you to change those
modulator parameters.
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