diff -Naur atscepg-0.1.0.org/atscepg.cpp atscepg-0.1.0/atscepg.cpp
--- atscepg-0.1.0.org/atscepg.cpp	2007-12-28 00:01:23.000000000 -0500
+++ atscepg-0.1.0/atscepg.cpp	2008-01-20 16:26:16.000000000 -0500
@@ -221,7 +221,8 @@
   {
     cChannel* c = Channels.GetByNumber(ChannelNumber); 
     if (c) {
-    	if (c->Modulation() == 7/*VSB_8*/ && ChannelNumber != lastChannel)
+        fprintf(stdout,"Modulation=%d\n",c->Modulation());
+    	if ((c->Modulation() == 7/*VSB_8*/ || c->Modulation() == 5 /*QAM256*/) && ChannelNumber != lastChannel)
     	{
     	  lastChannel = ChannelNumber;
     	  cATSCFilter::Instance()->Attach( (cDevice*) Device, c);
diff -Naur atscepg-0.1.0.org/filter.cpp atscepg-0.1.0/filter.cpp
--- atscepg-0.1.0.org/filter.cpp	2007-12-28 00:03:49.000000000 -0500
+++ atscepg-0.1.0/filter.cpp	2008-01-19 16:49:25.000000000 -0500
@@ -154,8 +154,14 @@
       dprint(L_MSG, "Received MGT: new version, updating (%d -> %d).", getMGTVersion(), newVersion);
       if (!mgt)
   	    mgt = new MGT(Data);
-      else
-  		  mgt->update(Data);
+      else 
+            mgt->update(Data);
+
+      if (mgt->getCRCFailed()) {
+        delete mgt;
+        mgt = NULL;
+        return;
+      }
 
       setMGTVersion(newVersion);
   		updateTables = true;
diff -Naur atscepg-0.1.0.org/scanner.cpp atscepg-0.1.0/scanner.cpp
--- atscepg-0.1.0.org/scanner.cpp	2007-12-28 00:37:34.000000000 -0500
+++ atscepg-0.1.0/scanner.cpp	2008-08-01 18:20:06.000000000 -0400
@@ -129,7 +129,7 @@
 		
 		if (file) {
 		  char c = (Tid == 0xC9) ? 'C' : 'T';
-      fprintf(file, "%s:%d:M8:%c:0:", name, currentFrequency, c);
+      fprintf(file, "%s:%d:M4:%c:0:",  name, currentFrequency, c);
       if (ch.PCR_PID && ch.PCR_PID != ch.vPID)
         fprintf(file, "%d+%d:", ch.vPID, ch.PCR_PID);
       else
diff -Naur atscepg-0.1.0.org/tables.cpp atscepg-0.1.0/tables.cpp
--- atscepg-0.1.0.org/tables.cpp	2007-12-27 23:38:24.000000000 -0500
+++ atscepg-0.1.0/tables.cpp	2008-01-21 12:35:12.000000000 -0500
@@ -56,9 +56,11 @@
   protocol_version       = data[8];
   
   //CRC_32 = get_u32(data+section_length-1);
-  
+
+  crc_failed = 0;  
   if ( !SI::CRC32::isValid( (const char*)data, section_length+3) ) {
-    dprint(L_ERR, "CRC 32 integrity check failed");    
+    dprint(L_ERR, "CRC 32 integrity check failed"); 
+    crc_failed = 1;   
   }
 
 }
@@ -103,6 +105,10 @@
 
 void MGT::parse(const u8* data)
 {
+  if (getCRCFailed()) {
+    return;
+  }
+
   u16 tables_defined = get_u16( data+9 );
   
   const uchar* d = data + 11;
@@ -306,7 +312,7 @@
     u8  service_type         = (d[27] & 0x3F);
     */
     u16 source_id            = get_u16( d+28 );
-    
+
     Channel ch(transport_stream_id, source_id, short_name); 
     ch.majorChannelNumber =  major_channel_number;
     ch.minorChannelNumber =  minor_channel_number;
diff -Naur atscepg-0.1.0.org/tables.h atscepg-0.1.0/tables.h
--- atscepg-0.1.0.org/tables.h	2007-12-27 23:38:14.000000000 -0500
+++ atscepg-0.1.0/tables.h	2008-01-19 17:21:00.000000000 -0500
@@ -24,6 +24,7 @@
 	u32 getNumDescriptors(void) { return descriptors.size(); }
 	Descriptor* getDescriptor(u32 i);
 	static u8 extractVersion(const u8* data) { return (data[5] >> 1) & 0x1F; }
+        u8 getCRCFailed() { return crc_failed; }
 	 
 protected:
   void addDescriptors(const u8* data, u16 length);
@@ -42,6 +43,7 @@
   u8  protocol_version;
   // PSIP_table_data()
   //u32 CRC_32;
+  u8 crc_failed;
 
 	std::vector<Descriptor*> descriptors;
 };
diff -Naur atscepg-0.1.0.org/vdrInterface.cpp atscepg-0.1.0/vdrInterface.cpp
--- atscepg-0.1.0.org/vdrInterface.cpp	2007-12-26 19:37:27.000000000 -0500
+++ atscepg-0.1.0/vdrInterface.cpp	2008-01-28 18:49:38.000000000 -0500
@@ -187,7 +187,7 @@
 { 
   char c = (table_id == 0xC9) ? 'C' : 'T';
   int freq = cATSCFilter::Frequency();
-  fprintf(stderr, "\n%s:%d:M8:%c:0:", ch.short_name.c_str(), freq, c);
+  fprintf(stderr, "\n%s:%d:M4:%c:0:", ch.short_name.c_str(), freq, c);
 
   if (ch.PCR_PID && ch.PCR_PID != ch.vPID)
     fprintf(stderr, "%d+%d:", ch.vPID, ch.PCR_PID);