diff --git a/src/SimpleParallelAnalyzerResults.cpp b/src/SimpleParallelAnalyzerResults.cpp
index af4e382..c24c872 100644
--- a/src/SimpleParallelAnalyzerResults.cpp
+++ b/src/SimpleParallelAnalyzerResults.cpp
@@ -21,7 +21,7 @@ void SimpleParallelAnalyzerResults::GenerateBubbleText( U64 frame_index, Channel
     Frame frame = GetFrame( frame_index );
 
     char number_str[ 128 ];
-    AnalyzerHelpers::GetNumberString( frame.mData1, display_base, 16, number_str, 128 );
+    AnalyzerHelpers::GetNumberString( frame.mData1, display_base, mSettings->dataBits(), number_str, 128 );
     AddResultString( number_str );
 }
 
@@ -44,7 +44,7 @@ void SimpleParallelAnalyzerResults::GenerateExportFile( const char* file, Displa
         AnalyzerHelpers::GetTimeString( frame.mStartingSampleInclusive, trigger_sample, sample_rate, time_str, 128 );
 
         char number_str[ 128 ];
-        AnalyzerHelpers::GetNumberString( frame.mData1, display_base, 16, number_str, 128 );
+        AnalyzerHelpers::GetNumberString( frame.mData1, display_base, mSettings->dataBits(), number_str, 128 );
 
         ss << time_str << "," << number_str << std::endl;
 
diff --git a/src/SimpleParallelAnalyzerSettings.cpp b/src/SimpleParallelAnalyzerSettings.cpp
index e9a8f8a..cf0f037 100644
--- a/src/SimpleParallelAnalyzerSettings.cpp
+++ b/src/SimpleParallelAnalyzerSettings.cpp
@@ -23,6 +23,7 @@ SimpleParallelAnalyzerSettings::SimpleParallelAnalyzerSettings()
 
         mDataChannelsInterface.push_back( data_channel_interface );
     }
+    mDataBits = 0;
 
 
     mClockChannelInterface.reset( new AnalyzerSettingInterfaceChannel() );
@@ -82,6 +83,7 @@ bool SimpleParallelAnalyzerSettings::SetSettingsFromInterfaces()
         SetErrorText( "Please select at least one channel to use in the parallel bus" );
         return false;
     }
+    mDataBits = num_used_channels;
 
     for( U32 i = 0; i < count; i++ )
     {
@@ -107,10 +109,14 @@ bool SimpleParallelAnalyzerSettings::SetSettingsFromInterfaces()
 void SimpleParallelAnalyzerSettings::UpdateInterfacesFromSettings()
 {
     U32 count = mDataChannels.size();
+    U32 num_used_channels = 0;
     for( U32 i = 0; i < count; i++ )
     {
         mDataChannelsInterface[ i ]->SetChannel( mDataChannels[ i ] );
+        if( mDataChannels[ i ] != UNDEFINED_CHANNEL )
+            num_used_channels++;
     }
+    mDataBits = num_used_channels;
 
     mClockChannelInterface->SetChannel( mClockChannel );
     mClockEdgeInterface->SetNumber( static_cast<double>( mClockEdge ) );
@@ -122,11 +128,14 @@ void SimpleParallelAnalyzerSettings::LoadSettings( const char* settings )
     text_archive.SetString( settings );
 
     U32 count = mDataChannels.size();
-
+    U32 num_used_channels = 0;
     for( U32 i = 0; i < count; i++ )
     {
         text_archive >> mDataChannels[ i ];
+        if( mDataChannels[ i ] != UNDEFINED_CHANNEL )
+            num_used_channels++;
     }
+    mDataBits = num_used_channels;
 
     text_archive >> mClockChannel;
     U32 edge;
diff --git a/src/SimpleParallelAnalyzerSettings.h b/src/SimpleParallelAnalyzerSettings.h
index 29299f7..bfe8a5b 100644
--- a/src/SimpleParallelAnalyzerSettings.h
+++ b/src/SimpleParallelAnalyzerSettings.h
@@ -22,6 +22,10 @@ class SimpleParallelAnalyzerSettings : public AnalyzerSettings
     void UpdateInterfacesFromSettings();
     virtual void LoadSettings( const char* settings );
     virtual const char* SaveSettings();
+    U32 dataBits() const
+    {
+        return mDataBits;
+    }
 
 
     std::vector<Channel> mDataChannels;
@@ -34,6 +38,8 @@ class SimpleParallelAnalyzerSettings : public AnalyzerSettings
 
     std::unique_ptr<AnalyzerSettingInterfaceChannel> mClockChannelInterface;
     std::unique_ptr<AnalyzerSettingInterfaceNumberList> mClockEdgeInterface;
+
+    U32 mDataBits; // valid channel number of mDataChannels
 };
 
 #endif // SIMPLEPARALLEL_ANALYZER_SETTINGS