diff --git a/openhantek/src/hantekdso/mathchannel.cpp b/openhantek/src/hantekdso/mathchannel.cpp
index 106e68a..9d36187 100644
--- a/openhantek/src/hantekdso/mathchannel.cpp
+++ b/openhantek/src/hantekdso/mathchannel.cpp
@@ -96,14 +96,12 @@ void MathChannel::calculate( DSOsamples &result ) {
                             : 0.0 );
             break;
         case Dso::MathMode::GREAT_CH1_CH2:
-            // logic values: above / below trigger level
             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:
-            // logic values: above / below trigger level
             for ( auto it = mathChannel.begin(), end = mathChannel.end(); it != end; ++it, ++ch1Iterator, ++ch2Iterator )
                 *it = ( ( *ch2Iterator ) > ( *ch1Iterator )
                             ? 1.0