diff --git a/plugins/channelrx/demodam/amdemodgui.cpp b/plugins/channelrx/demodam/amdemodgui.cpp
index 069f6d59f..55649ad92 100644
--- a/plugins/channelrx/demodam/amdemodgui.cpp
+++ b/plugins/channelrx/demodam/amdemodgui.cpp
@@ -154,24 +154,9 @@ void AMDemodGUI::viewChanged()
 	applySettings();
 }
 
-void AMDemodGUI::on_deltaMinus_toggled(bool minus)
+void AMDemodGUI::on_deltaFrequency_changed(qint64 value)
 {
-	int deltaFrequency = m_channelMarker.getCenterFrequency();
-	bool minusDelta = (deltaFrequency < 0);
-
-	if (minus ^ minusDelta) // sign change
-	{
-		m_channelMarker.setCenterFrequency(-deltaFrequency);
-	}
-}
-
-void AMDemodGUI::on_deltaFrequency_changed(quint64 value)
-{
-	if (ui->deltaMinus->isChecked()) {
-		m_channelMarker.setCenterFrequency(-value);
-	} else {
-		m_channelMarker.setCenterFrequency(value);
-	}
+    m_channelMarker.setCenterFrequency(value);
 }
 
 void AMDemodGUI::on_bandpassEnable_toggled(bool checked)
@@ -243,7 +228,9 @@ AMDemodGUI::AMDemodGUI(PluginAPI* pluginAPI, DeviceSourceAPI *deviceAPI, QWidget
 
 	connect(&m_pluginAPI->getMainWindow()->getMasterTimer(), SIGNAL(timeout()), this, SLOT(tick())); // 50 ms
 
-	ui->deltaFrequency->setColorMapper(ColorMapper(ColorMapper::GrayGold));
+    ui->deltaFrequencyLabel->setText(QString("%1f").arg(QChar(0x94, 0x03)));
+    ui->deltaFrequency->setColorMapper(ColorMapper(ColorMapper::GrayGold));
+    ui->deltaFrequency->setValueRange(false, 7, -9999999, 9999999);
 	ui->channelPowerMeter->setColorTheme(LevelMeterSignalDB::ColorGreenAndBlue);
 
 	//m_channelMarker = new ChannelMarker(this);
@@ -287,8 +274,7 @@ void AMDemodGUI::applySettings()
 			48000,
 			m_channelMarker.getCenterFrequency());
 
-		ui->deltaFrequency->setValue(abs(m_channelMarker.getCenterFrequency()));
-		ui->deltaMinus->setChecked(m_channelMarker.getCenterFrequency() < 0);
+		ui->deltaFrequency->setValue(m_channelMarker.getCenterFrequency());
 
 		m_amDemod->configure(m_amDemod->getInputMessageQueue(),
 			ui->rfBW->value() * 100.0,
diff --git a/plugins/channelrx/demodam/amdemodgui.h b/plugins/channelrx/demodam/amdemodgui.h
index 9d477e81e..b11955d5f 100644
--- a/plugins/channelrx/demodam/amdemodgui.h
+++ b/plugins/channelrx/demodam/amdemodgui.h
@@ -39,8 +39,7 @@ public:
 
 private slots:
 	void viewChanged();
-	void on_deltaFrequency_changed(quint64 value);
-	void on_deltaMinus_toggled(bool minus);
+	void on_deltaFrequency_changed(qint64 value);
 	void on_bandpassEnable_toggled(bool checked);
 	void on_rfBW_valueChanged(int value);
 	void on_volume_valueChanged(int value);
diff --git a/plugins/channelrx/demodam/amdemodgui.ui b/plugins/channelrx/demodam/amdemodgui.ui
index b7a3531a3..32e54120e 100644
--- a/plugins/channelrx/demodam/amdemodgui.ui
+++ b/plugins/channelrx/demodam/amdemodgui.ui
@@ -76,26 +76,20 @@
       <item>
        <layout class="QHBoxLayout" name="deltaFrequencyLayout">
         <item>
-         <widget class="QToolButton" name="deltaMinus">
-          <property name="toolTip">
-           <string>Frequency shift direction</string>
+         <widget class="QLabel" name="deltaFrequencyLabel">
+          <property name="minimumSize">
+           <size>
+            <width>16</width>
+            <height>0</height>
+           </size>
           </property>
           <property name="text">
-           <string>...</string>
-          </property>
-          <property name="icon">
-           <iconset>
-            <selectedoff>:/plus.png</selectedoff>
-            <selectedon>:/minus.png</selectedon>
-           </iconset>
-          </property>
-          <property name="checkable">
-           <bool>true</bool>
+           <string>Df</string>
           </property>
          </widget>
         </item>
         <item>
-         <widget class="ValueDial" name="deltaFrequency" native="true">
+         <widget class="ValueDialZ" name="deltaFrequency" native="true">
           <property name="sizePolicy">
            <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
             <horstretch>0</horstretch>
@@ -396,12 +390,6 @@
    <header>gui/rollupwidget.h</header>
    <container>1</container>
   </customwidget>
-  <customwidget>
-   <class>ValueDial</class>
-   <extends>QWidget</extends>
-   <header>gui/valuedial.h</header>
-   <container>1</container>
-  </customwidget>
   <customwidget>
    <class>LevelMeterSignalDB</class>
    <extends>QWidget</extends>
@@ -413,6 +401,12 @@
    <extends>QToolButton</extends>
    <header>gui/buttonswitch.h</header>
   </customwidget>
+  <customwidget>
+   <class>ValueDialZ</class>
+   <extends>QWidget</extends>
+   <header>gui/valuedialz.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../../../sdrbase/resources/res.qrc"/>
diff --git a/plugins/channelrx/demoddsd/dsddemodgui.cpp b/plugins/channelrx/demoddsd/dsddemodgui.cpp
index 81180dc61..4e6bd3e5a 100644
--- a/plugins/channelrx/demoddsd/dsddemodgui.cpp
+++ b/plugins/channelrx/demoddsd/dsddemodgui.cpp
@@ -189,7 +189,7 @@ void DSDDemodGUI::viewChanged()
 
 void DSDDemodGUI::on_deltaFrequency_changed(qint64 value)
 {
-    m_channelMarker.setCenterFrequency(-value);
+    m_channelMarker.setCenterFrequency(value);
 }
 
 void DSDDemodGUI::on_rfBW_valueChanged(int value)