If "Blindscan" mode is selected, it does not scan a selected transponder from the preprogrammed list. Instead, it analyzes all signals from the satellite. If it finds an active transponder, it adds the transponder to the list then scans for any active TV or Radio channels.
If "Auto" polarity is selected during the blindscan, it will scan both horizontal and vertical polarities for active transponders then log any active channels.
If "All" is selected, any type of scan will log both scrambled and in-the-clear channels. If "FTA" is selected, only channels that are flagged by the broadcaster as unencrypted will be logged. If "FTA" is selected, channels that are flagged as encrypted will not be logged (even if the channel is false flagged and is not scrambled).
I usually first scan in "FTA" mode so all of the free channels are grouped together. Then I do a second scan in the "All" mode to see if there are any false flagged channels that are actually in the clear. Easier to edit out the unwanted channels if they are grouped together.