diff --git a/Conf.cpp b/Conf.cpp
index bf638e5..1d8c2d9 100644
--- a/Conf.cpp
+++ b/Conf.cpp
@@ -69,6 +69,7 @@ m_modemTXDelay(100U),
 m_modemDMRDelay(0U),
 m_modemRXLevel(100U),
 m_modemTXLevel(100U),
+m_modemOscOffset(0),
 m_modemDebug(false),
 m_dstarEnabled(true),
 m_dstarModule("C"),
@@ -212,6 +213,8 @@ bool CConf::read()
 			m_modemRXLevel = (unsigned int)::atoi(value);
 		else if (::strcmp(key, "TXLevel") == 0)
 			m_modemTXLevel = (unsigned int)::atoi(value);
+		else if (::strcmp(key, "OscOffset") == 0)
+			m_modemOscOffset = ::atoi(value);
 		else if (::strcmp(key, "Debug") == 0)
 			m_modemDebug = ::atoi(value) == 1;
 	} else if (section == SECTION_DSTAR) {
@@ -416,6 +419,11 @@ unsigned int CConf::getModemTXLevel() const
 	return m_modemTXLevel;
 }
 
+int CConf::getModemOscOffset() const
+{
+	return m_modemOscOffset;
+}
+
 bool CConf::getModemDebug() const
 {
 	return m_modemDebug;
diff --git a/Conf.h b/Conf.h
index 5350f39..217d04c 100644
--- a/Conf.h
+++ b/Conf.h
@@ -62,6 +62,7 @@ public:
   unsigned int getModemDMRDelay() const;
   unsigned int getModemRXLevel() const;
   unsigned int getModemTXLevel() const;
+  int          getModemOscOffset() const;
   bool         getModemDebug() const;
 
   // The D-Star section
@@ -139,6 +140,7 @@ private:
   unsigned int m_modemDMRDelay;
   unsigned int m_modemRXLevel;
   unsigned int m_modemTXLevel;
+  int          m_modemOscOffset;
   bool         m_modemDebug;
 
   bool         m_dstarEnabled;
diff --git a/MMDVM.ini b/MMDVM.ini
index 183cf46..2aa5b2b 100644
--- a/MMDVM.ini
+++ b/MMDVM.ini
@@ -33,6 +33,7 @@ TXDelay=100
 DMRDelay=0
 RXLevel=50
 TXLevel=50
+OscOffset=0
 Debug=0
 
 [D-Star]
diff --git a/MMDVMHost.cpp b/MMDVMHost.cpp
index ab3cf72..b1c4ced 100644
--- a/MMDVMHost.cpp
+++ b/MMDVMHost.cpp
@@ -419,6 +419,7 @@ bool CMMDVMHost::createModem()
 	unsigned int colorCode   = m_conf.getDMRColorCode();
 	unsigned int rxFrequency = m_conf.getRxFrequency();
 	unsigned int txFrequency = m_conf.getTxFrequency();
+	int oscOffset            = m_conf.getModemOscOffset();
 
 	LogInfo("Modem Parameters");
 	LogInfo("    Port: %s", port.c_str());
@@ -426,13 +427,14 @@ bool CMMDVMHost::createModem()
 	LogInfo("    TX Invert: %s", txInvert ? "yes" : "no");
 	LogInfo("    PTT Invert: %s", pttInvert ? "yes" : "no");
 	LogInfo("    TX Delay: %ums", txDelay);
-	LogInfo("    DMR Delay: %u", dmrDelay);
+	LogInfo("    DMR Delay: %u (%.1fms)", dmrDelay, float(dmrDelay) * 0.0416666F);
 	LogInfo("    RX Level: %u%%", rxLevel);
 	LogInfo("    TX Level: %u%%", txLevel);
 	LogInfo("    RX Frequency: %uHz", rxFrequency);
 	LogInfo("    TX Frequency: %uHz", txFrequency);
+	LogInfo("    Osc. Offset: %dppm", oscOffset);
 
-	m_modem = new CModem(port, rxInvert, txInvert, pttInvert, txDelay, rxLevel, txLevel, dmrDelay, debug);
+	m_modem = new CModem(port, rxInvert, txInvert, pttInvert, txDelay, rxLevel, txLevel, dmrDelay, oscOffset, debug);
 	m_modem->setModeParams(m_dstarEnabled, m_dmrEnabled, m_ysfEnabled);
 	m_modem->setRFParams(rxFrequency, txFrequency);
 	m_modem->setDMRParams(colorCode);
diff --git a/Modem.cpp b/Modem.cpp
index 0090bcf..b23b200 100644
--- a/Modem.cpp
+++ b/Modem.cpp
@@ -72,7 +72,7 @@ const unsigned int MAX_RESPONSES = 30U;
 const unsigned int BUFFER_LENGTH = 500U;
 
 
-CModem::CModem(const std::string& port, bool rxInvert, bool txInvert, bool pttInvert, unsigned int txDelay, unsigned int rxLevel, unsigned int txLevel, unsigned int dmrDelay, bool debug) :
+CModem::CModem(const std::string& port, bool rxInvert, bool txInvert, bool pttInvert, unsigned int txDelay, unsigned int rxLevel, unsigned int txLevel, unsigned int dmrDelay, int oscOffset, bool debug) :
 m_port(port),
 m_colorCode(0U),
 m_rxInvert(rxInvert),
@@ -82,6 +82,7 @@ m_txDelay(txDelay),
 m_dmrDelay(dmrDelay),
 m_rxLevel(rxLevel),
 m_txLevel(txLevel),
+m_oscOffset(oscOffset),
 m_debug(debug),
 m_rxFrequency(0U),
 m_txFrequency(0U),
@@ -724,11 +725,11 @@ bool CModem::readStatus()
 
 bool CModem::setConfig()
 {
-	unsigned char buffer[11U];
+	unsigned char buffer[12U];
 
 	buffer[0U] = MMDVM_FRAME_START;
 
-	buffer[1U] = 11U;
+	buffer[1U] = 12U;
 
 	buffer[2U] = MMDVM_SET_CONFIG;
 
@@ -759,10 +760,12 @@ bool CModem::setConfig()
 
 	buffer[10U] = m_dmrDelay;
 
-	// CUtils::dump(1U, "Written", buffer, 11U);
+	buffer[11U] = (unsigned char)(m_oscOffset + 128);
 
-	int ret = m_serial.write(buffer, 11U);
-	if (ret != 11)
+	// CUtils::dump(1U, "Written", buffer, 12U);
+
+	int ret = m_serial.write(buffer, 12U);
+	if (ret != 12)
 		return false;
 
 	unsigned int count = 0U;
diff --git a/Modem.h b/Modem.h
index 38b1059..d6ea23e 100644
--- a/Modem.h
+++ b/Modem.h
@@ -33,7 +33,7 @@ enum RESP_TYPE_MMDVM {
 
 class CModem {
 public:
-	CModem(const std::string& port, bool rxInvert, bool txInvert, bool pttInvert, unsigned int txDelay, unsigned int rxLevel, unsigned int txLevel, unsigned int dmrDelay, bool debug = false);
+	CModem(const std::string& port, bool rxInvert, bool txInvert, bool pttInvert, unsigned int txDelay, unsigned int rxLevel, unsigned int txLevel, unsigned int dmrDelay, int oscOffset, bool debug = false);
 	~CModem();
 
 	void setRFParams(unsigned int rxFrequency, unsigned int txFrequency);
@@ -78,6 +78,7 @@ private:
 	unsigned int               m_dmrDelay;
 	unsigned int               m_rxLevel;
 	unsigned int               m_txLevel;
+	int                        m_oscOffset;
 	bool                       m_debug;
 	unsigned int               m_rxFrequency;
 	unsigned int               m_txFrequency;