Final Controls
The controls in the Final Menu differ slightly between the FM output path and the HD output paths, but both adjust the final limiting and clipping stages as applicable.
FM Path
Select the FM output path (1A), then click on the Final menu (1B).
The Bass Compressor Threshold control (1C) is active only on presets that use Wideband AGC 2 set to "Bass Only" mode. Lower settings provide more bass compression activity.
The threshold of the bass clipper is set with the Bass Clipper Threshold control (1D). Raising the threshold (moving the slider to the left) increases the amount of low-frequency clipping performed by the bass clipper as compared to the final clipper Lowering the threshold (moving the slider to the right) relies more on the final clipper to manage low-frequency peaks, which can increase distortion on bass-heavy material.
The Final Clip Drive control (1E) adjusts the drive to the clipper, which is the final means of peak control in the FM path.
The Pre-emphasis dropdown (1F) determines whether the FM output has either a 50us or 75us pre-emphasis curve applied.
HD/Streaming Path
Select one of the enabled HD/Streaming output paths (2B), then click on the Final menu (2A).
The Bass Compressor Threshold control (2C) is active only on presets that use Wideband AGC 2 set to "Bass Only" mode. Lower settings provide more bass compression activity.
The threshold of the bass clipper is set with the Bass Clipper Threshold control (2D). Raising the threshold (moving the slider to the left) increases the amount of low-frequency clipping performed by the bass clipper as compared to the final clipper Lowering the threshold (moving the slider to the right) relies more on the final clipper to manage low-frequency peaks, which can increase distortion on bass-heavy material.
The Treble control (2E) reduces high-frequency content in order to provide a smoother transition from analog FM to HD (particularly important for HD Radio) and prevent the HD signal from being perceived as overly-bright compared to the analog signal.
The Final Limiter Drive control (2F) adjusts the drive to the look-ahead limiter, the final means of peak control in the HD path.
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