Crank up the waterfall zoom limits for more detail :)

src/visual/SpectrumCanvas.cpp

@@ -32,7 +32,8 @@ SpectrumCanvas::SpectrumCanvas(wxWindow *parent, int *attribList) :
     glContext = new PrimaryGLContext(this, &wxGetApp().GetContext(this));
 
     mouseTracker.setVertDragLock(true);
-
+    visualDataQueue.set_max_num_items(1);
+            
     SetCursor(wxCURSOR_SIZEWE);
 }
 

src/visual/WaterfallCanvas.cpp

@@ -90,8 +90,8 @@ void WaterfallCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
             centerFreq = getCenterFrequency();
             bw = getBandwidth();
             bw = (long long) ceil((long double) bw * currentZoom);
-            if (bw < 100000) {
-                bw = 100000;
+            if (bw < 30000) {
+                bw = 30000;
             }
             if (mouseTracker.mouseInView()) {
                 long long mfreqA = getFrequencyAt(mouseTracker.getMouseX());