diff --git a/Source/ControlComponent.cpp b/Source/ControlComponent.cpp
index 49c4379..2b40f14 100644
--- a/Source/ControlComponent.cpp
+++ b/Source/ControlComponent.cpp
@@ -270,6 +270,11 @@ ControlComponent::ControlComponent (ReceiverInterface *pReceiverControlListener,
     m_buttonResetReset->setButtonText (TRANS("Reset"));
     m_buttonResetReset->addListener (this);
 
+    addAndMakeVisible (m_buttonTest = new TextButton ("Test"));
+    m_buttonTest->setTooltip (TRANS("Test button"));
+    m_buttonTest->setButtonText (TRANS("Test"));
+    m_buttonTest->addListener (this);
+
     addAndMakeVisible (m_entryAgcMu_0 = new TextEditor ("AGC Adaption Rate 0"));
     m_entryAgcMu_0->setTooltip (TRANS("AGC Adaption Rate 0"));
     m_entryAgcMu_0->setMultiLine (false);
@@ -782,6 +787,7 @@ ControlComponent::~ControlComponent()
     m_labelNoiseStr = nullptr;
     m_labelSymbolReceivedCount = nullptr;
     m_buttonResetReset = nullptr;
+    m_buttonTest = nullptr;
     m_entryAgcMu_0 = nullptr;
     toggleButtonCmaTrainingEnable = nullptr;
     toggleButtonDfeTrainingEnable = nullptr;
@@ -1200,6 +1206,7 @@ void ControlComponent::resized()
     m_labelNoiseStr->setBounds (576, 624, 58, 24);
     m_labelSymbolReceivedCount->setBounds (544, 288, 90, 24);
     m_buttonResetReset->setBounds (512, 792, 64, 24);
+    m_buttonTest->setBounds (512, 692, 64, 24);
     m_entryAgcMu_0->setBounds (560, 104, 64, 24);
     toggleButtonCmaTrainingEnable->setBounds (24, 320, 64, 24);
     toggleButtonDfeTrainingEnable->setBounds (280, 320, 64, 24);
@@ -1329,6 +1336,12 @@ void ControlComponent::buttonClicked (Button* buttonThatWasClicked)
 		m_pReceiverControlListener->reset();
         //[/UserButtonCode_m_buttonResetReset]
     }
+    else if (buttonThatWasClicked == m_buttonTest)
+    {
+        //[UserButtonCode_m_buttonResetReset] -- add your button handler code here..
+		m_pReceiverControlListener->test();
+        //[/UserButtonCode_m_buttonResetReset]
+    }
     else if (buttonThatWasClicked == toggleButtonCmaTrainingEnable)
     {
         //[UserButtonCode_toggleButtonCmaTrainingEnable] -- add your button handler code here..
diff --git a/Source/ControlComponent.h b/Source/ControlComponent.h
index cd1fc3d..d206934 100644
--- a/Source/ControlComponent.h
+++ b/Source/ControlComponent.h
@@ -115,6 +115,7 @@ private:
     ScopedPointer<Label> m_labelNoiseStr;
     ScopedPointer<Label> m_labelSymbolReceivedCount;
     ScopedPointer<TextButton> m_buttonResetReset;
+    ScopedPointer<TextButton> m_buttonTest;
     ScopedPointer<TextEditor> m_entryAgcMu_0;
     ScopedPointer<ToggleButton> toggleButtonCmaTrainingEnable;
     ScopedPointer<ToggleButton> toggleButtonDfeTrainingEnable;
diff --git a/Source/Receiver.cpp b/Source/Receiver.cpp
index 795de08..dc67fd4 100644
--- a/Source/Receiver.cpp
+++ b/Source/Receiver.cpp
@@ -51,6 +51,7 @@ Receiver::Receiver(LogHandler *pLogHandler)
 	, m_frameReceiver()
 	, m_pSymMapper(0)
 	, m_tracker(1.0 - 5.0/EQ_UPD_INTERVAL)
+	, m_is_slip(0)
 {
 	m_params.numBitsPerSymbol = 2;
 	m_params.samplerate = 48000;
@@ -344,12 +345,6 @@ void Receiver::timerCallback()
 		m_statusListeners.call(&ReceiverStatusListener::receiverStatusChanged, this);
 	}
 
-//	printf("CMA\n");
-//	cout << m_cma2.getWeights() << endl;
-
-	printf("m_timingGenerator\n");
-	cout << m_timingGenerator.getMu() << endl;
-	cout << m_timingGenerator.getMuVar() << endl;
 }
 
 void Receiver::processPassband(RVec const &rf, size_t len)
@@ -391,15 +386,30 @@ void Receiver::processPassband(RVec const &rf, size_t len)
 	}
 
 #ifndef DISABLE_UNUSED_STATISTICS
-	SlidingVarProcessV(&m_statistics.RF, rf_noise.data(), len);
+	SlidingVarProcessV(&m_statistics.RF, rf_noise.data(), rf_noise.size());
 #endif
 
 	// Digital Down Converter
 	// @samplerate
-	m_nco_ddc.mixRealComplexV(m_passbandBuffer, rf_noise, RealScalar(2)/*m_params.agcGain[0]*/, len);
+	m_nco_ddc.mixRealComplexV(m_passbandBuffer, rf_noise, RealScalar(2)/*m_params.agcGain[0]*/, rf_noise.size());
+
+	CVec rf_duc;
+	rf_duc.reserve(m_passbandBuffer.size());
+
+	size_t len_eff = 0;
+	for (auto sample : m_passbandBuffer)
+	{
+		if (is_slip())
+		{
+			printf("isSlip()\n");
+			continue;
+		}
+		rf_duc.resize(len_eff+1);
+		rf_duc[len_eff++] = sample;
+	}
 
 	// Arm Filtering and downsampling
-	len_down = m_firArmDown.process(m_basebandBuffer, m_passbandBuffer, len);
+	len_down = m_firArmDown.process(m_basebandBuffer, rf_duc, rf_duc.size());
 	processBaseband(m_basebandBuffer, len_down);
 
 	
@@ -878,6 +888,22 @@ void Receiver::reset()
 	m_statusListeners.call(&ReceiverStatusListener::receiverStatusChanged, this);
 }
 
+void Receiver::test()
+{
+	const ScopedLock sl (m_lock);
+
+	printf("CMA\n");
+	cout << m_cma2.getWeights() << endl;
+
+	printf("m_timingGenerator\n");
+	cout << "MU:  " << m_timingGenerator.getMu() << endl;
+	cout << "Var: " << m_timingGenerator.getMuVar() << endl;
+
+	m_ReceiverEnable = false;
+	m_is_slip = 1;
+	m_ReceiverEnable = true;
+}
+
 void Receiver::statisticsReset()
 {
 	m_frameReceiver.resetStats();
diff --git a/Source/Receiver.hpp b/Source/Receiver.hpp
index 789ebd1..4a195b8 100644
--- a/Source/Receiver.hpp
+++ b/Source/Receiver.hpp
@@ -246,6 +246,7 @@ public:
 	virtual const status_t& getStatus() = 0;
 	virtual cpx_t getTracker(uint32 index) = 0;
 	virtual void reset() = 0;
+	virtual void test() = 0;
 	virtual void statisticsReset() = 0;
 	virtual void strReset() = 0;
 	virtual void cprReset() = 0;
@@ -412,6 +413,7 @@ private:
 	params_t& getParams() override;
 	status_t& getStatus() override;
 	void reset() override;
+	void test() override;
 	void strReset() override;
 	void cprReset() override;
 	void dfeReset() override;
@@ -430,6 +432,19 @@ private:
 	{
 		return m_dfe_off2.getWeights();
 	}
+
+	size_t m_is_slip;
+
+	bool is_slip()
+	{
+		bool result = m_is_slip;
+		if (m_is_slip)
+		{
+			m_is_slip--;
+		}
+
+		return result;
+	}
 };
 
 #endif // _RECEIVER_H_