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hi is there any link/signal quality plugin for vdr?i've googled a lot and didn't found it.

yes, femon - http://www.saunalahti.fi/~rahrenbe/vdr/femon/

Next time try VDR WIKI, it also lists plugins. Much easier.

Main WIKI pages: English: http://www.linuxtv.org/vdrwiki/index.php/Main_Page German: http://www.vdr-wiki.de/wiki/index.php/Hauptseite

English / plugins: http://www.linuxtv.org/vdrwiki/index.php/Plugins "femon Shows the DVB signal quality Rolf Ahrenberg"

Much faster than searching with google..