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+w_scan2 is a small channel scan tool which generates
+ATSC, DVB-C, DVB-S/S2 and DVB-T/T2 channels.conf files.
+
+It's based on the old "scan" tool from linuxtv-dvb-apps-1.1.0
+
+The differences are:
+- no initial tuning data needed, because scanning without this data is
+ exactly what a scan tool like this should do
+- it detects automatically which DVB/ATSC card to use
+- much more output formats, interfacing to other dtv software.
+
+w_scan2 is a fork of the original w_scan
+from https://www.gen2vdr.de/wirbel/w_scan/index2.html
+
+main changes from w_scan to w_scan2
+- keep duplicate transponders by default because a stronger transponder
+ with the same ID might have a higher frequency and be discarded
+ simply because it's scanned later.
+- Also don't replace the current transponder with an advertised one by
+ default. The latter may have a lower signal strength.
+ https://stefantalpalaru.wordpress.com/2016/02/04/scan-all-the-things/
+- The old behaviour can be enabled with -d
+ (--delete-duplicate-transponders).
+- re-enable VHF band III in Europe