diff --git a/plugins/samplesource/rtlsdr/rtlsdrinput.cpp b/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
index c2f3a65f8..0039ce08a 100644
--- a/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
+++ b/plugins/samplesource/rtlsdr/rtlsdrinput.cpp
@@ -100,6 +100,8 @@ bool RTLSDRInput::openDevice()
         return false;
     }
 
+    m_sampleFifo.setWrittenSignalRateDivider(32);
+
     int device;
 
     if ((device = rtlsdr_get_index_by_serial(qPrintable(m_deviceAPI->getSamplingDeviceSerial()))) < 0)
diff --git a/sdrbase/dsp/samplesinkfifo.cpp b/sdrbase/dsp/samplesinkfifo.cpp
index fc5e98fac..03c906537 100644
--- a/sdrbase/dsp/samplesinkfifo.cpp
+++ b/sdrbase/dsp/samplesinkfifo.cpp
@@ -16,6 +16,7 @@
 // along with this program. If not, see <http://www.gnu.org/licenses/>.          //
 ///////////////////////////////////////////////////////////////////////////////////
 
+#include "maincore.h"
 #include "samplesinkfifo.h"
 
 //#define MIN(x, y) (((x) < (y)) ? (x) : (y))
@@ -42,6 +43,9 @@ void SampleSinkFifo::reset()
 SampleSinkFifo::SampleSinkFifo(QObject* parent) :
 	QObject(parent),
 	m_data(),
+	m_total(0),
+	m_writtenSignalCount(0),
+	m_writtenSignalRateDivider(1),
 	m_mutex(QMutex::Recursive)
 {
 	m_suppressed = -1;
@@ -54,6 +58,9 @@ SampleSinkFifo::SampleSinkFifo(QObject* parent) :
 SampleSinkFifo::SampleSinkFifo(int size, QObject* parent) :
 	QObject(parent),
 	m_data(),
+	m_total(0),
+	m_writtenSignalCount(0),
+	m_writtenSignalRateDivider(1),
 	m_mutex(QMutex::Recursive)
 {
 	m_suppressed = -1;
@@ -63,6 +70,9 @@ SampleSinkFifo::SampleSinkFifo(int size, QObject* parent) :
 SampleSinkFifo::SampleSinkFifo(const SampleSinkFifo& other) :
     QObject(other.parent()),
     m_data(other.m_data),
+	m_total(0),
+	m_writtenSignalCount(0),
+	m_writtenSignalRateDivider(1),
 	m_mutex(QMutex::Recursive)
 {
   	m_suppressed = -1;
@@ -85,6 +95,12 @@ bool SampleSinkFifo::setSize(int size)
 	return m_data.size() == (unsigned int)size;
 }
 
+void SampleSinkFifo::setWrittenSignalRateDivider(unsigned int divider)
+{
+	QMutexLocker mutexLocker(&m_mutex);
+	m_writtenSignalRateDivider = divider;
+}
+
 unsigned int SampleSinkFifo::write(const quint8* data, unsigned int count)
 {
 	QMutexLocker mutexLocker(&m_mutex);
@@ -108,6 +124,7 @@ unsigned int SampleSinkFifo::write(const quint8* data, unsigned int count)
 			m_suppressed = 0;
 			m_msgRateTimer.start();
 			qCritical("SampleSinkFifo::write: overflow - dropping %u samples", count - total);
+			emit overflow(count - total);
 		}
         else
         {
@@ -115,6 +132,7 @@ unsigned int SampleSinkFifo::write(const quint8* data, unsigned int count)
             {
 				qCritical("SampleSinkFifo::write: %u messages dropped", m_suppressed);
 				qCritical("SampleSinkFifo::write: overflow - dropping %u samples", count - total);
+				emit overflow(count - total);
 				m_suppressed = -1;
 			}
             else
@@ -141,6 +159,15 @@ unsigned int SampleSinkFifo::write(const quint8* data, unsigned int count)
 		emit dataReady();
     }
 
+	m_total += total;
+
+	if (++m_writtenSignalCount >= m_writtenSignalRateDivider)
+	{
+		emit written(m_total, MainCore::instance()->getElapsedNsecs());
+		m_total = 0;
+		m_writtenSignalCount = 0;
+	}
+
 	return total;
 }
 
@@ -166,6 +193,7 @@ unsigned int SampleSinkFifo::write(SampleVector::const_iterator begin, SampleVec
 			m_suppressed = 0;
 			m_msgRateTimer.start();
 			qCritical("SampleSinkFifo::write: overflow - dropping %u samples", count - total);
+			emit overflow(count - total);
 		}
         else
         {
@@ -173,6 +201,7 @@ unsigned int SampleSinkFifo::write(SampleVector::const_iterator begin, SampleVec
             {
 				qCritical("SampleSinkFifo::write: %u messages dropped", m_suppressed);
 				qCritical("SampleSinkFifo::write: overflow - dropping %u samples", count - total);
+				emit overflow(count - total);
 				m_suppressed = -1;
 			}
             else
@@ -199,6 +228,15 @@ unsigned int SampleSinkFifo::write(SampleVector::const_iterator begin, SampleVec
 		emit dataReady();
     }
 
+	m_total += total;
+
+	if (++m_writtenSignalCount >= m_writtenSignalRateDivider)
+	{
+		emit written(m_total, MainCore::instance()->getElapsedNsecs());
+		m_total = 0;
+		m_writtenSignalCount = 0;
+	}
+
 	return total;
 }
 
@@ -217,8 +255,10 @@ unsigned int SampleSinkFifo::read(SampleVector::iterator begin, SampleVector::it
 
 	total = std::min(count, m_fill);
 
-    if (total < count) {
+    if (total < count)
+	{
 		qCritical("SampleSinkFifo::read: underflow - missing %u samples", count - total);
+		emit underflow(count - total);
     }
 
 	remaining = total;
@@ -254,8 +294,10 @@ unsigned int SampleSinkFifo::readBegin(unsigned int count,
 
 	total = std::min(count, m_fill);
 
-    if (total < count) {
+    if (total < count)
+	{
 		qCritical("SampleSinkFifo::readBegin: underflow - missing %u samples", count - total);
+		emit underflow(count - total);
     }
 
 	remaining = total;
diff --git a/sdrbase/dsp/samplesinkfifo.h b/sdrbase/dsp/samplesinkfifo.h
index 64c93912e..c20e9784b 100644
--- a/sdrbase/dsp/samplesinkfifo.h
+++ b/sdrbase/dsp/samplesinkfifo.h
@@ -32,6 +32,9 @@ private:
 	QElapsedTimer m_msgRateTimer;
 	int m_suppressed;
 	SampleVector m_data;
+	int m_total;
+	unsigned int m_writtenSignalCount;
+	unsigned int m_writtenSignalRateDivider;
 	QMutex m_mutex;
 
 	unsigned int m_size;
@@ -49,6 +52,7 @@ public:
 
 	bool setSize(int size);
     void reset();
+	void setWrittenSignalRateDivider(unsigned int divider);
 	inline unsigned int size() { QMutexLocker mutexLocker(&m_mutex); unsigned int size = m_size; return size; }
 	inline unsigned int fill() { QMutexLocker mutexLocker(&m_mutex); unsigned int fill = m_fill; return fill; }
 
@@ -65,6 +69,9 @@ public:
 
 signals:
 	void dataReady();
+	void written(int nsamples, qint64 timestamp);
+	void overflow(int nsamples);
+	void underflow(int nsamples);
 };
 
 #endif // INCLUDE_SAMPLEFIFO_H
diff --git a/sdrbase/maincore.cpp b/sdrbase/maincore.cpp
index 96eb24b89..e99e777d8 100644
--- a/sdrbase/maincore.cpp
+++ b/sdrbase/maincore.cpp
@@ -62,6 +62,8 @@ MainCore::MainCore()
 {
 	m_masterTimer.setTimerType(Qt::PreciseTimer);
 	m_masterTimer.start(50);
+    m_startMsecsSinceEpoch = QDateTime::currentMSecsSinceEpoch();
+    m_masterElapsedTimer.start();
 }
 
 MainCore::~MainCore()
diff --git a/sdrbase/maincore.h b/sdrbase/maincore.h
index b3e1cfdf0..8477cc9f9 100644
--- a/sdrbase/maincore.h
+++ b/sdrbase/maincore.h
@@ -22,6 +22,7 @@
 
 #include <QMap>
 #include <QTimer>
+#include <QElapsedTimer>
 #include <QDateTime>
 #include <QObject>
 
@@ -706,6 +707,8 @@ public:
 	static MainCore *instance();
 
     const QTimer& getMasterTimer() const { return m_masterTimer; }
+    qint64 getElapsedNsecs() const { return m_masterElapsedTimer.nsecsElapsed(); } //!< Elapsed nanoseconds since main core construction
+    qint64 getStartMsecsSinceEpoch() const { return m_startMsecsSinceEpoch; } //!< Epoch timestamp in millisecodns close to elapsed timer start
     const MainSettings& getSettings() const { return m_settings; }
     MessageQueue *getMainMessageQueue() { return m_mainMessageQueue; }
     const PluginManager *getPluginManager() const { return m_pluginManager; }
@@ -760,6 +763,8 @@ private:
     MessageQueue *m_mainMessageQueue;
     int m_masterTabIndex;
     QTimer m_masterTimer;
+    QElapsedTimer m_masterElapsedTimer;
+    qint64 m_startMsecsSinceEpoch;
     std::vector<DeviceSet*> m_deviceSets;
     std::vector<FeatureSet*> m_featureSets;
     QMap<DeviceSet*, int> m_deviceSetsMap;       //!< Device set instance to device set index map