diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.cpp b/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
index 5706565..269fe1f 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
@@ -152,3 +152,34 @@ void RTLSDRGui::updateHardware()
 	message->submit(m_pluginAPI->getDSPEngineMessageQueue());
 	m_updateTimer.stop();
 }
+
+void RTLSDRGui::on_checkBox_stateChanged(int state) {
+	if (state == Qt::Checked){
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode((ui->radioButton->isChecked()) ? true : false);
+		ui->radioButton->setEnabled(true);
+		ui->radioButton_2->setEnabled(true);
+		ui->gain->setEnabled(false);
+		//ui->decimation->setMaximum(6);
+
+		ui->centerFrequency->setValueRange(5, 0U, 30000U);
+		ui->centerFrequency->setValue(0);
+	}
+	else {
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(0);
+		ui->radioButton->setEnabled(false);
+		ui->radioButton_2->setEnabled(false);
+		ui->gain->setEnabled(true);
+		//ui->decimation->setMaximum(4);
+
+		ui->centerFrequency->setValueRange(7, 20000U, 2200000U);
+	}
+}
+
+void RTLSDRGui::on_radioButton_toggled(bool checked){
+	if (checked)
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(1);
+}
+void RTLSDRGui::on_radioButton_2_toggled(bool checked){
+	if (checked)
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(2);
+}
\ No newline at end of file
diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.h b/plugins/samplesource/rtlsdr/rtlsdrgui.h
index 46b248b..1c7c269 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.h
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.h
@@ -46,6 +46,9 @@ private slots:
 	void on_centerFrequency_changed(quint64 value);
 	void on_gain_valueChanged(int value);
 	void on_decimation_valueChanged(int value);
+	void on_checkBox_stateChanged(int state);
+	void on_radioButton_toggled(bool checked);
+	void on_radioButton_2_toggled(bool checked);
 
 	void updateHardware();
 };
diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.ui b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
index ce2ea4c..9a09002 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.ui
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>132</width>
-    <height>82</height>
+    <height>119</height>
    </rect>
   </property>
   <property name="sizePolicy">
@@ -214,6 +214,63 @@
      </item>
     </layout>
    </item>
+   <item>
+    <widget class="Line" name="line">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QCheckBox" name="checkBox">
+       <property name="text">
+        <string>ds</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QRadioButton" name="radioButton">
+       <property name="enabled">
+        <bool>false</bool>
+       </property>
+       <property name="text">
+        <string>i</string>
+       </property>
+       <property name="checkable">
+        <bool>true</bool>
+       </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QRadioButton" name="radioButton_2">
+       <property name="enabled">
+        <bool>false</bool>
+       </property>
+       <property name="text">
+        <string>q</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer_3">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
   </layout>
  </widget>
  <customwidgets>
diff --git a/plugins/samplesource/rtlsdr/rtlsdrinput.cpp b/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
index a5d1d95..e9258c4 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
+++ b/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
@@ -228,3 +228,8 @@ bool RTLSDRInput::applySettings(const GeneralSettings& generalSettings, const Se
 	}
 	return true;
 }
+
+
+void RTLSDRInput::set_ds_mode(int on){
+	rtlsdr_set_direct_sampling(m_dev, on);
+}
\ No newline at end of file
diff --git a/plugins/samplesource/rtlsdr/rtlsdrinput.h b/plugins/samplesource/rtlsdr/rtlsdrinput.h
index ec9f804..35592b2 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrinput.h
+++ b/plugins/samplesource/rtlsdr/rtlsdrinput.h
@@ -91,6 +91,9 @@ public:
 
 	bool handleMessage(Message* message);
 
+
+	void set_ds_mode(int on);
+
 private:
 	QMutex m_mutex;
 	Settings m_settings;