diff --git a/global.h b/global.h
index a6ad5e9..2ec28a6 100644
--- a/global.h
+++ b/global.h
@@ -35,7 +35,7 @@
 
 
 #define PROGRAM_NAME          "DSRemote"
-#define PROGRAM_VERSION       "0.31_1601091241"
+#define PROGRAM_VERSION       "0.32_1601091426"
 
 #define MAX_PATHLEN            4096
 
diff --git a/interface.cpp b/interface.cpp
index 4f194f4..c47ac48 100644
--- a/interface.cpp
+++ b/interface.cpp
@@ -3298,9 +3298,9 @@ void UI_Mainwindow::toggle_fft_unit()
 
   if(devparms.math_fft_unit == 1)
   {
-    devparms.fft_vscale = 0.5;
+    devparms.fft_vscale = 1.0;
 
-    devparms.fft_voffset = -2.0;
+    devparms.fft_voffset = 0.0;
 
     devparms.math_fft_unit = 0;
 
@@ -3313,6 +3313,10 @@ void UI_Mainwindow::toggle_fft_unit()
       set_cue_cmd(":MATH:FFT:UNIT VRMS");
     }
 
+    sprintf(str, ":MATH:OFFS %e", devparms.fft_voffset);
+
+    set_cue_cmd(str);
+
     sprintf(str, ":MATH:SCAL %e", devparms.fft_vscale);
 
     set_cue_cmd(str);
@@ -3329,6 +3333,8 @@ void UI_Mainwindow::toggle_fft_unit()
 
     devparms.fft_voffset = 20.0;
 
+    devparms.math_fft_unit = 1;
+
     if(devparms.modelserie == 6)
     {
       set_cue_cmd(":CALC:FFT:VSM DBVR");
@@ -3338,6 +3344,10 @@ void UI_Mainwindow::toggle_fft_unit()
      set_cue_cmd(":MATH:FFT:UNIT DB");
     }
 
+    sprintf(str, ":MATH:OFFS %e", devparms.fft_voffset);
+
+    set_cue_cmd(str);
+
     sprintf(str, ":MATH:SCAL %e", devparms.fft_vscale);
 
     set_cue_cmd(str);
@@ -3346,8 +3356,6 @@ void UI_Mainwindow::toggle_fft_unit()
 
     set_cue_cmd(str);
 
-    devparms.math_fft_unit = 1;
-
     statusLabel->setText("FFT unit: dB");
   }
 }
diff --git a/mainwindow.cpp b/mainwindow.cpp
index ee41cc4..d4dccd3 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -352,6 +352,8 @@ void UI_Mainwindow::open_connection()
 
   sprintf(str, PROGRAM_NAME " " PROGRAM_VERSION "   %s   %s   %s",
           devparms.serialnr, devparms.softwvers, dev_str);
+//   sprintf(str, PROGRAM_NAME " " PROGRAM_VERSION "   %s   %s",
+//           devparms.softwvers, dev_str);
 
   setWindowTitle(str);
 
@@ -3235,9 +3237,9 @@ void UI_Mainwindow::chan_scale_minus()
     }
     else
     {
-      if(devparms.fft_vscale < 2.0)
+      if(devparms.fft_vscale < 1.0)
       {
-        devparms.fft_vscale = 2.0;
+        devparms.fft_vscale = 1.0;
       }
     }
 
diff --git a/screen_thread.cpp b/screen_thread.cpp
index 75fa4c6..150ee69 100644
--- a/screen_thread.cpp
+++ b/screen_thread.cpp
@@ -30,7 +30,7 @@
 
 
 #define SPECT_LOG_MINIMUM (0.00000001)
-#define SPECT_LOG_MINIMUM_LOG (-8)
+#define SPECT_LOG_MINIMUM_LOG (-80)
 
 
 void screenThread::set_device(struct tmcdev *tmdev)
@@ -686,8 +686,8 @@ void screenThread::run()
             {
               params.fftbuf_out[k] = SPECT_LOG_MINIMUM;
             }
-
-            params.fftbuf_out[k] = log10(params.fftbuf_out[k]);
+            // convert to deciBel's, not to Bel's!
+            params.fftbuf_out[k] = log10(params.fftbuf_out[k]) * 10.0;
 
             if(params.fftbuf_out[k] < SPECT_LOG_MINIMUM_LOG)
             {
diff --git a/signalcurve.cpp b/signalcurve.cpp
index 50e619b..f3d2752 100644
--- a/signalcurve.cpp
+++ b/signalcurve.cpp
@@ -759,9 +759,9 @@ void SignalCurve::drawFFT(QPainter *painter, int curve_h_b, int curve_w_b)
       h_step /= 24.0;
     }
 
-    fft_v_sense = curve_h / (-0.8 * devparms->fft_vscale);
+    fft_v_sense = (double)curve_h / (-8.0 * devparms->fft_vscale);
 
-    fft_v_offset = (curve_h / 2.0) - (((double)curve_h / (8.0 * devparms->fft_vscale)) * devparms->fft_voffset);
+    fft_v_offset = (curve_h / 2.0) + (fft_v_sense * devparms->fft_voffset);
 
     fft_h_offset = (curve_w / 2) - ((devparms->math_fft_hcenter / devparms->math_fft_hscale) * curve_w / devparms->hordivisions);