Audio Filter
Improves the sound for individual channels in the case of distortion in mono broadcasts. Sometimes a
If you do not experience any sound distortion, we recommend that you leave this option set to the factory setting “Off”.
~
You cannot receive stereo or dual sound when “Low” or “High” is selected. “Audio Filter” is not available when “System” is set to “L”.
LNA
Improves the picture quality in case of very weak broadcast signal (noisy picture).
Skip
Skips unused analogue channels when you press PROG +/- to select channels. (You can still select a skipped channel using the number buttons.)
Decoder
Views and records the scrambled channel selected when using a decoder connected
directly to scart connector 
/
1, or to scart connector 
/
2 via a VCR.
~
Depending on the country/region selected for “Country” (page 5), this option may not be available.
Confirm
Saves changes made to the “Manual Programme Preset” settings.