diff --git a/docs/OpenHantek6022_User_Manual.odt b/docs/OpenHantek6022_User_Manual.odt
index c49656be..6a31400d 100644
Binary files a/docs/OpenHantek6022_User_Manual.odt and b/docs/OpenHantek6022_User_Manual.odt differ
diff --git a/openhantek/src/hantekdso/mathchannel.cpp b/openhantek/src/hantekdso/mathchannel.cpp
index 4915ec84..9d36187b 100644
--- a/openhantek/src/hantekdso/mathchannel.cpp
+++ b/openhantek/src/hantekdso/mathchannel.cpp
@@ -95,6 +95,18 @@ void MathChannel::calculate( DSOsamples &result ) {
                             ? 1.0
                             : 0.0 );
             break;
+        case Dso::MathMode::GREAT_CH1_CH2:
+            for ( auto it = mathChannel.begin(), end = mathChannel.end(); it != end; ++it, ++ch1Iterator, ++ch2Iterator )
+                *it = ( ( *ch1Iterator ) > ( *ch2Iterator )
+                            ? 1.0
+                            : 0.0 );
+            break;
+        case Dso::MathMode::GREAT_CH2_CH1:
+            for ( auto it = mathChannel.begin(), end = mathChannel.end(); it != end; ++it, ++ch1Iterator, ++ch2Iterator )
+                *it = ( ( *ch2Iterator ) > ( *ch1Iterator )
+                            ? 1.0
+                            : 0.0 );
+            break;
         default:
             for ( auto it = mathChannel.begin(), end = mathChannel.end(); it != end; ++it )
                 *it = 0.0;
diff --git a/openhantek/src/hantekdso/mathmodes.cpp b/openhantek/src/hantekdso/mathmodes.cpp
index d4d66c7a..9c97ef45 100644
--- a/openhantek/src/hantekdso/mathmodes.cpp
+++ b/openhantek/src/hantekdso/mathmodes.cpp
@@ -10,7 +10,8 @@ Unit mathModeUnit( MathMode mode ) {
     if ( mode == MathMode::MUL_CH1_CH2 || mode == MathMode::SQ_CH1 || mode == MathMode::SQ_CH2 )
         return UNIT_VOLTSQUARE;
     else if ( mode == MathMode::AND_CH1_CH2 || mode == MathMode::AND_NOT_CH1_CH2 || mode == MathMode::AND_CH1_NOT_CH2 ||
-              mode == MathMode::AND_NOT_CH1_NOT_CH2 || mode == MathMode::EQU_CH1_CH2 || mode == MathMode::SIGN_AC_CH1 ||
+              mode == MathMode::AND_NOT_CH1_NOT_CH2 || mode == MathMode::EQU_CH1_CH2 || mode == MathMode::GREAT_CH1_CH2 ||
+              mode == MathMode::GREAT_CH2_CH1 || mode == MathMode::SIGN_AC_CH1 ||
               mode == MathMode::SIGN_AC_CH2 || mode == MathMode::SIGN_CH1 || mode == MathMode::SIGN_CH2 ||
               mode == MathMode::TRIG_CH2 || mode == MathMode::TRIG_CH1 || mode == MathMode::TRIG_CH2 )
         return UNIT_NONE; // logic values 0 or 1
@@ -48,6 +49,10 @@ QString mathModeString( MathMode mode ) {
         return QCoreApplication::tr( "CH1 & /CH2" );
     case MathMode::EQU_CH1_CH2:
         return QCoreApplication::tr( "CH1 == CH2" );
+    case MathMode::GREAT_CH1_CH2:
+        return QCoreApplication::tr( "CH1 > CH2" );
+    case MathMode::GREAT_CH2_CH1:
+        return QCoreApplication::tr( "CH2 > CH1" );
     case MathMode::LP10_CH1:
         return QCoreApplication::tr( "CH1 LP10" );
     case MathMode::LP10_CH2:
diff --git a/openhantek/src/hantekdso/mathmodes.h b/openhantek/src/hantekdso/mathmodes.h
index 254ef707..5ddec7bf 100644
--- a/openhantek/src/hantekdso/mathmodes.h
+++ b/openhantek/src/hantekdso/mathmodes.h
@@ -23,6 +23,8 @@ enum class MathMode : unsigned {
     AND_NOT_CH1_CH2,
     AND_CH1_NOT_CH2,
     EQU_CH1_CH2,
+    GREAT_CH1_CH2,
+    GREAT_CH2_CH1,
     // unary arithmetical functions
     LP10_CH1,
     LP10_CH2,
@@ -47,7 +49,7 @@ enum class MathMode : unsigned {
 // this "extern" declaration must match the Enum definition in "mathchannel.cpp"
 extern Enum< Dso::MathMode, Dso::MathMode::ADD_CH1_CH2, Dso::MathMode::TRIG_CH2 > MathModeEnum;
 
-const auto LastBinaryMathMode = MathMode::EQU_CH1_CH2;
+const auto LastBinaryMathMode = MathMode::GREAT_CH2_CH1;
 const auto LastMathMode = MathMode::TRIG_CH2;
 
 Unit mathModeUnit( MathMode mode );