diff --git a/plugins/samplesource/bladerf/bladerfinput.cpp b/plugins/samplesource/bladerf/bladerfinput.cpp
index 3c9755066..e726aae54 100644
--- a/plugins/samplesource/bladerf/bladerfinput.cpp
+++ b/plugins/samplesource/bladerf/bladerfinput.cpp
@@ -19,7 +19,6 @@
 #include <QDebug>
 
 #include "util/simpleserializer.h"
-#include "dsp/dspengine.h"
 #include "dsp/dspcommands.h"
 #include "bladerfgui.h"
 #include "bladerfinput.h"
diff --git a/plugins/samplesource/fcd/fcdinput.cpp b/plugins/samplesource/fcd/fcdinput.cpp
index ff1f89059..52ed3abb2 100644
--- a/plugins/samplesource/fcd/fcdinput.cpp
+++ b/plugins/samplesource/fcd/fcdinput.cpp
@@ -21,6 +21,7 @@
 #include "fcdthread.h"
 #include "fcdgui.h"
 #include "qthid.h"
+#include "dsp/dspcommands.h"
 #include "util/simpleserializer.h"
 
 MESSAGE_CLASS_DEFINITION(FCDInput::MsgConfigureFCD, Message)
@@ -178,7 +179,13 @@ void FCDInput::applySettings(const Settings& settings, bool force)
 	{
 		set_lna_gain(settings.gain > 0);
 		set_bias_t(settings.bias > 0);
-	}	
+	}
+    
+    if (sampleSourcChange)
+    {
+		DSPSignalNotification *notif = new DSPSignalNotification(960000, m_settings.centerFrequency);
+		getOutputMessageQueue()->push(notif);        
+    }
 }
 
 void FCDInput::set_center_freq(double freq)
diff --git a/plugins/samplesource/filesource/filesourceinput.cpp b/plugins/samplesource/filesource/filesourceinput.cpp
index a2ecb0fa9..7506d77a9 100644
--- a/plugins/samplesource/filesource/filesourceinput.cpp
+++ b/plugins/samplesource/filesource/filesourceinput.cpp
@@ -19,6 +19,7 @@
 #include <QDebug>
 
 #include "util/simpleserializer.h"
+#include "dsp/dspcommands.h"
 #include "dsp/filesink.h"
 
 #include "filesourcegui.h"
@@ -272,6 +273,9 @@ bool FileSourceInput::applySettings(const Settings& settings, bool force)
 				m_fileSourceThread->startWork();
 			}
 		}
+        
+		DSPSignalNotification *notif = new DSPSignalNotification(m_sampleRate, m_centerFrequency);
+		getOutputMessageQueue()->push(notif);                
 
 		qDebug() << "FileSourceInput::applySettings:"
 				<< " file name: " << settings.m_fileName.toStdString().c_str()
diff --git a/plugins/samplesource/rtlsdr/rtlsdrinput.cpp b/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
index c1c23bbed..869926add 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
+++ b/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
@@ -20,6 +20,7 @@
 #include "rtlsdrinput.h"
 #include "rtlsdrthread.h"
 #include "rtlsdrgui.h"
+#include "dsp/dspcommands.h"
 #include "util/simpleserializer.h"
 
 MESSAGE_CLASS_DEFINITION(RTLSDRInput::MsgConfigureRTLSDR, Message)
@@ -259,6 +260,7 @@ bool RTLSDRInput::handleMessage(const Message& message)
 bool RTLSDRInput::applySettings(const Settings& settings, bool force)
 {
 	QMutexLocker mutexLocker(&m_mutex);
+    bool forwardChange = false;
 
 	if ((m_settings.m_gain != settings.m_gain) || force)
 	{
@@ -275,6 +277,8 @@ bool RTLSDRInput::applySettings(const Settings& settings, bool force)
 
 	if ((m_settings.m_devSampleRate != settings.m_devSampleRate) || force)
 	{
+        forwardChange = true;
+        
 		if(m_dev != 0)
 		{
 			if( rtlsdr_set_sample_rate(m_dev, settings.m_devSampleRate) < 0)
@@ -306,6 +310,8 @@ bool RTLSDRInput::applySettings(const Settings& settings, bool force)
 
 	if ((m_settings.m_log2Decim != settings.m_log2Decim) || force)
 	{
+        forwardChange = true;
+        
 		if(m_dev != 0)
 		{
 			m_settings.m_log2Decim = settings.m_log2Decim;
@@ -313,6 +319,11 @@ bool RTLSDRInput::applySettings(const Settings& settings, bool force)
 		}
 	}
 
+    if (m_settings.m_centerFrequency != settings.m_centerFrequency)
+    {
+        forwardChange = true;
+    }
+
 	m_settings.m_centerFrequency = settings.m_centerFrequency;
 
 	if(m_dev != 0)
@@ -333,6 +344,13 @@ bool RTLSDRInput::applySettings(const Settings& settings, bool force)
 			qDebug("rtlsdr_set_center_freq(%lld) failed", m_settings.m_centerFrequency);
 		}
 	}
+    
+    if (forwardChange)
+    {
+		int sampleRate = m_settings.m_devSampleRate/(1<<m_settings.m_log2Decim);
+		DSPSignalNotification *notif = new DSPSignalNotification(sampleRate, m_settings.m_centerFrequency);
+		getOutputMessageQueue()->push(notif);        
+    }
 
 	return true;
 }