Automatic Frequency Control enhancement. Provides default AFC and ability to disable in the Decoder tab of each channel. Spectral display includes visual indicators of frequency center (grey) and current AFC offset (yellow).

src/decode/mdc1200/MDCDecoder.java

@@ -25,6 +25,7 @@ import instrument.tap.stream.FloatTap;
 import java.util.ArrayList;
 import java.util.List;
 
+import sample.Listener;
 import source.Source.SampleType;
 import alias.AliasList;
 import bits.MessageFramer;
@@ -199,4 +200,10 @@ public class MDCDecoder extends Decoder implements Instrumentable
 			default:
 		}
     }
+
+	@Override
+    public void addUnfilteredFloatListener( Listener<Float> listener )
+    {
+		//Not implemented
+    }
 }