AM Transmitter section Settings for AM transmitters. AM asymmetry panel AM asymmetry settings.
AM asymmetric limiting and clipping Enables asymmetrical limiting and clipping for AM stations.
Allow bigger peaks to The direction in which higher peaks are allowed.
This depends on how the transmitter is connected to the sound card. Tests are probably needed to determine the correct setting.
Asymmetry Sttength How asymmetrical the sound may be.
The allowed value here depends on your local legislation. Values upto 200% are supported, but usually not allowed.
Note: Opposed to other uses, when you increase this level, you need to lower the settings of Post amplifier to allow for the extra headroom. This is a workaround for now.