diff -ruN vdr-1/config.c vdr-2/config.c
--- vdr-1/config.c	2012-09-10 22:31:51.000000000 +0200
+++ vdr-2/config.c	2012-09-10 22:33:34.000000000 +0200
@@ -393,6 +393,7 @@
   DiSEqC = 0;
   SetSystemTime = 0;
   TimeSource = 0;
+  ChannelBlocker = 0;
   TimeTransponder = 0;
   StandardCompliance = STANDARD_DVB;
   MarginStart = 2;
@@ -652,6 +653,7 @@
   else if (!strcasecmp(Name, "SetSystemTime"))       SetSystemTime      = atoi(Value);
   else if (!strcasecmp(Name, "TimeSource"))          TimeSource         = cSource::FromString(Value);
   else if (!strcasecmp(Name, "TimeTransponder"))     TimeTransponder    = atoi(Value);
+  else if (!strcasecmp(Name, "ChannelBlocker"))      ChannelBlocker     = atoi(Value);
   else if (!strcasecmp(Name, "StandardCompliance"))  StandardCompliance = atoi(Value);
   else if (!strcasecmp(Name, "MarginStart"))         MarginStart        = atoi(Value);
   else if (!strcasecmp(Name, "MarginStop"))          MarginStop         = atoi(Value);
@@ -831,6 +833,7 @@
   Store("SetSystemTime",      SetSystemTime);
   Store("TimeSource",         cSource::ToString(TimeSource));
   Store("TimeTransponder",    TimeTransponder);
+  Store("ChannelBlocker",     ChannelBlocker);
   Store("StandardCompliance", StandardCompliance);
   Store("MarginStart",        MarginStart);
   Store("MarginStop",         MarginStop);
diff -ruN vdr-1/config.h vdr-2/config.h
--- vdr-1/config.h	2012-09-10 22:31:51.000000000 +0200
+++ vdr-2/config.h	2012-09-10 22:33:34.000000000 +0200
@@ -296,6 +296,7 @@
   int SetSystemTime;
   int TimeSource;
   int TimeTransponder;
+  int ChannelBlocker;
   int StandardCompliance;
   int MarginStart, MarginStop;
   int AudioLanguages[I18N_MAX_LANGUAGES + 1];
diff -ruN vdr-1/dvbdevice.c vdr-2/dvbdevice.c
--- vdr-1/dvbdevice.c	2012-09-10 22:31:50.000000000 +0200
+++ vdr-2/dvbdevice.c	2012-09-10 22:33:34.000000000 +0200
@@ -1435,6 +1435,10 @@
 
 bool cDvbDevice::ProvidesSource(int Source) const
 {
+  if (Setup.ChannelBlocker == 1) {
+      if (IsPrimaryDevice()) return false;
+      //isyslog("ChannelBlocker aktive on primary Interface");
+  }
   int type = Source & cSource::st_Mask;
   return type == cSource::stNone
       || type == cSource::stAtsc  && ProvidesDeliverySystem(SYS_ATSC)
diff -ruN vdr-1/menu.c vdr-2/menu.c
--- vdr-1/menu.c	2012-09-10 22:31:51.000000000 +0200
+++ vdr-2/menu.c	2012-09-10 22:33:34.000000000 +0200
@@ -3345,6 +3345,7 @@
 #ifdef USE_TTXTSUBS
   Add(new cMenuEditBoolItem(tr("Setup.DVB$Enable teletext support"), &data.SupportTeletext));
 #endif // USE_TTXTSUBS
+  Add(new cMenuEditBoolItem(tr("Setup.DVB$Channel Blocker"),             &data.ChannelBlocker));

   SetCurrent(Get(current));
   Display();
diff -ruN vdr-1/po/de_DE.po vdr-2/po/de_DE.po
--- vdr-1/po/de_DE.po	2012-09-10 22:31:51.000000000 +0200
+++ vdr-2/po/de_DE.po	2012-09-10 22:33:34.000000000 +0200
@@ -997,6 +997,9 @@
 msgid "Setup.DVB$Update channels"
 msgstr "Kanäle aktualisieren"
 
+msgid "Setup.DVB$Channel Blocker"
+msgstr "Tuner des primären DVB blocken"
+
 msgid "Setup.DVB$channel binding by Rid"
 msgstr "Kanal per Rid zuordnen"