diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.cpp b/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
index 28caab7a3..9196761b1 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.cpp
@@ -10,7 +10,7 @@ RTLSDRGui::RTLSDRGui(PluginAPI* pluginAPI, QWidget* parent) :
 	m_sampleSource(NULL)
 {
 	ui->setupUi(this);
-	ui->centerFrequency->setValueRange(7, 28900U, 1700000U);
+	ui->centerFrequency->setValueRange(7, 28500U, 1700000U);
 	connect(&m_updateTimer, SIGNAL(timeout()), this, SLOT(updateHardware()));
 	displaySettings();
 
@@ -157,28 +157,21 @@ void RTLSDRGui::updateHardware()
 
 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);
+		// Direct Modes: 0: off, 1: I, 2: Q, 3: NoMod.
+		((RTLSDRInput*)m_sampleSource)->set_ds_mode(3);
 		ui->gain->setEnabled(false);
-		ui->centerFrequency->setValueRange(7, 1000U, 28700U);
-		ui->centerFrequency->setValue(27000);
+		ui->centerFrequency->setValueRange(7, 1000U, 275000U);
+		ui->centerFrequency->setValue(7000);
+		m_generalSettings.m_centerFrequency = 7000 * 1000;
 	}
 	else {
 		((RTLSDRInput*)m_sampleSource)->set_ds_mode(0);
-		ui->radioButton->setEnabled(false);
-		ui->radioButton_2->setEnabled(false);
 		ui->gain->setEnabled(true);
-		ui->centerFrequency->setValueRange(7, 28900U, 1700000U);
-		ui->centerFrequency->setValue(29000);
+		ui->centerFrequency->setValueRange(7, 28500U, 1700000U);
+		ui->centerFrequency->setValue(434000);
+		ui->gain->setValue(0);
+		m_generalSettings.m_centerFrequency = 434000 * 1000;
 	}
+	sendSettings();
 }
 
-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);
-}
diff --git a/plugins/samplesource/rtlsdr/rtlsdrgui.h b/plugins/samplesource/rtlsdr/rtlsdrgui.h
index 19d23e05e..c5031dba0 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.h
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.h
@@ -47,9 +47,6 @@ private slots:
 	void on_gain_valueChanged(int value);
 	void on_samplerate_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 490027fc1..9be23107b 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrgui.ui
+++ b/plugins/samplesource/rtlsdr/rtlsdrgui.ui
@@ -226,33 +226,7 @@
      <item>
       <widget class="QCheckBox" name="checkBox">
        <property name="text">
-        <string>Direct Sampling: </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>
+        <string>No-mod Direct Sampling</string>
        </property>
       </widget>
      </item>
diff --git a/plugins/samplesource/rtlsdr/rtlsdrthread.h b/plugins/samplesource/rtlsdr/rtlsdrthread.h
index edb055a4c..13983b003 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrthread.h
+++ b/plugins/samplesource/rtlsdr/rtlsdrthread.h
@@ -23,7 +23,6 @@
 #include <QWaitCondition>
 #include <rtl-sdr.h>
 #include "dsp/samplefifo.h"
-#include "dsp/inthalfbandfilter.h"
 
 class RTLSDRThread : public QThread {
 	Q_OBJECT
@@ -34,8 +33,7 @@ public:
 
 	void startWork();
 	void stopWork();
-
-	void setSamplerate(int sanplerate);
+	void setSamplerate(int samplerate);
 
 private:
 	QMutex m_startWaitMutex;
@@ -49,7 +47,6 @@ private:
 	int m_samplerate;
 
 	void run();
-
 	void decimate2(SampleVector::iterator* it, const quint8* buf, qint32 len);
 	void decimate4(SampleVector::iterator* it, const quint8* buf, qint32 len);
 	void decimate8(SampleVector::iterator* it, const quint8* buf, qint32 len);