diff --git a/mainwindow.cpp b/mainwindow.cpp
index b2474ce..ef079eb 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -39,6 +39,8 @@ MainWindow::MainWindow()
     connect(dock, SIGNAL(openFile(QString)), this, SLOT(openFile(QString)));
     connect(dock, SIGNAL(fftSizeChanged(int)), plots, SLOT(setFFTSize(int)));
     connect(dock->zoomLevelSlider, SIGNAL(valueChanged(int)), plots, SLOT(setZoomLevel(int)));
+    connect(dock->powerMaxSlider, SIGNAL(valueChanged(int)), plots, SLOT(setPowerMax(int)));
+    connect(dock->powerMinSlider, SIGNAL(valueChanged(int)), plots, SLOT(setPowerMin(int)));
     connect(dock->cursorsCheckBox, &QCheckBox::stateChanged, plots, &PlotView::enableCursors);
 
     // Set defaults after making connections so everything is in sync
diff --git a/plotview.cpp b/plotview.cpp
index b860241..585cc8b 100644
--- a/plotview.cpp
+++ b/plotview.cpp
@@ -130,6 +130,22 @@ void PlotView::setZoomLevel(int zoom)
     updateView();
 }
 
+void PlotView::setPowerMin(int power)
+{
+    powerMin = power;
+    if (spectrogramPlot != nullptr)
+        spectrogramPlot->setPowerMin(power);
+    updateView();
+}
+
+void PlotView::setPowerMax(int power)
+{
+    powerMax = power;
+    if (spectrogramPlot != nullptr)
+        spectrogramPlot->setPowerMax(power);
+    updateView();
+}
+
 void PlotView::paintEvent(QPaintEvent *event)
 {
     if (mainSampleSource == nullptr) return;
diff --git a/plotview.h b/plotview.h
index 5983b1c..d46814d 100644
--- a/plotview.h
+++ b/plotview.h
@@ -43,6 +43,8 @@ public slots:
     void selectionCleared();
     void setFFTSize(int size);
     void setZoomLevel(int zoom);
+    void setPowerMin(int power);
+    void setPowerMax(int power);
 
 protected:
     void paintEvent(QPaintEvent *event);
@@ -62,6 +64,8 @@ private:
 
     int fftSize;
     int zoomLevel;
+    int powerMin;
+    int powerMax;
 
     TracePlot* createIQPlot(SampleSource<std::complex<float>> *src);
     TracePlot* createQuadratureDemodPlot(SampleSource<std::complex<float>> *src);