diff --git a/plugins/channelrx/demodatv/atvdemodgui.cpp b/plugins/channelrx/demodatv/atvdemodgui.cpp
index d36896b6a..3674673f4 100644
--- a/plugins/channelrx/demodatv/atvdemodgui.cpp
+++ b/plugins/channelrx/demodatv/atvdemodgui.cpp
@@ -93,7 +93,7 @@ void ATVDemodGUI::resetToDefaults()
     ui->rfBW->setValue(10);
     ui->rfOppBW->setValue(10);
     ui->bfo->setValue(0);
-    ui->fmDeviation->setValue(100);
+    ui->fmDeviation->setValue(250);
 
     blockApplySettings(false);
     lineTimeUpdate();
@@ -184,7 +184,7 @@ bool ATVDemodGUI::deserialize(const QByteArray& arrData)
         ui->invertVideo->setChecked(booltmp);
         d.readS32(16, &tmp, 0);
         ui->nbLines->setCurrentIndex(tmp);
-        d.readS32(17, &tmp, 100);
+        d.readS32(17, &tmp, 250);
         ui->fmDeviation->setValue(tmp);
         d.readS32(18, &tmp, 1);
         ui->standard->setCurrentIndex(tmp);
@@ -400,7 +400,7 @@ void ATVDemodGUI::applyRFSettings()
                 ui->rfFiltering->isChecked(),
                 ui->decimatorEnable->isChecked(),
                 ui->bfo->value(),
-                ui->fmDeviation->value() / 100.0f);
+                ui->fmDeviation->value() / 500.0f);
     }
 }
 
@@ -633,7 +633,7 @@ void ATVDemodGUI::on_bfo_valueChanged(int value)
 
 void ATVDemodGUI::on_fmDeviation_valueChanged(int value)
 {
-    ui->fmDeviationText->setText(QString("%1").arg(value));
+    ui->fmDeviationText->setText(QString("%1").arg(value / 10.0, 0, 'f', 1));
     applyRFSettings();
 }
 
diff --git a/plugins/channelrx/demodatv/atvdemodgui.ui b/plugins/channelrx/demodatv/atvdemodgui.ui
index f97bc0745..2736cb74b 100644
--- a/plugins/channelrx/demodatv/atvdemodgui.ui
+++ b/plugins/channelrx/demodatv/atvdemodgui.ui
@@ -331,17 +331,20 @@
           <height>24</height>
          </size>
         </property>
+        <property name="toolTip">
+         <string>FM deviation as % of full bandwidth</string>
+        </property>
         <property name="minimum">
          <number>1</number>
         </property>
         <property name="maximum">
-         <number>125</number>
+         <number>500</number>
         </property>
         <property name="pageStep">
          <number>1</number>
         </property>
         <property name="value">
-         <number>100</number>
+         <number>250</number>
         </property>
        </widget>
       </item>
@@ -349,12 +352,15 @@
        <widget class="QLabel" name="fmDeviationText">
         <property name="minimumSize">
          <size>
-          <width>20</width>
+          <width>30</width>
           <height>0</height>
          </size>
         </property>
+        <property name="toolTip">
+         <string>FM deviation as % of full bandwidth</string>
+        </property>
         <property name="text">
-         <string>100</string>
+         <string>25.0</string>
         </property>
         <property name="alignment">
          <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
diff --git a/plugins/channeltx/modatv/atvmodgui.cpp b/plugins/channeltx/modatv/atvmodgui.cpp
index 15fb5941c..9f028363b 100644
--- a/plugins/channeltx/modatv/atvmodgui.cpp
+++ b/plugins/channeltx/modatv/atvmodgui.cpp
@@ -154,7 +154,7 @@ bool ATVModGUI::deserialize(const QByteArray& data)
         ui->fps->setCurrentIndex(tmp);
         d.readS32(12, &tmp, 80);
         ui->rfScaling->setValue(tmp);
-        d.readS32(13, &tmp, 50);
+        d.readS32(13, &tmp, 250);
         ui->fmExcursion->setValue(tmp);
 
         blockApplySettings(false);
@@ -400,7 +400,7 @@ void ATVModGUI::on_rfScaling_valueChanged(int value)
 
 void ATVModGUI::on_fmExcursion_valueChanged(int value)
 {
-    ui->fmExcursionText->setText(tr("%1").arg(value));
+    ui->fmExcursionText->setText(tr("%1").arg(value / 10.0, 0, 'f', 1));
     applySettings();
 }
 
@@ -713,7 +713,7 @@ void ATVModGUI::applySettings()
 			ui->channelMute->isChecked(),
 			ui->invertVideo->isChecked(),
 			ui->rfScaling->value() * 327.68f,
-			ui->fmExcursion->value() / 100.0f,
+			ui->fmExcursion->value() / 1000.0f, // percentage of full bandwidth. Value in pro milli
 			ui->forceDecimator->isChecked());
 	}
 }
diff --git a/plugins/channeltx/modatv/atvmodgui.ui b/plugins/channeltx/modatv/atvmodgui.ui
index 64144eca5..1ef1bfc96 100644
--- a/plugins/channeltx/modatv/atvmodgui.ui
+++ b/plugins/channeltx/modatv/atvmodgui.ui
@@ -299,16 +299,16 @@
          <string>FM excursion in % of total bandwidth</string>
         </property>
         <property name="minimum">
-         <number>0</number>
+         <number>1</number>
         </property>
         <property name="maximum">
-         <number>100</number>
+         <number>500</number>
         </property>
         <property name="pageStep">
          <number>1</number>
         </property>
         <property name="value">
-         <number>50</number>
+         <number>250</number>
         </property>
        </widget>
       </item>
@@ -316,15 +316,15 @@
        <widget class="QLabel" name="fmExcursionText">
         <property name="minimumSize">
          <size>
-          <width>20</width>
+          <width>30</width>
           <height>0</height>
          </size>
         </property>
         <property name="toolTip">
-         <string>FM deviation percentage of total bandwidth</string>
+         <string>FM excursion in % of total bandwidth</string>
         </property>
         <property name="text">
-         <string>50</string>
+         <string>25.0</string>
         </property>
         <property name="alignment">
          <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>