diff --git a/CWIdTX.cpp b/CWIdTX.cpp
index 189e774..36784db 100644
--- a/CWIdTX.cpp
+++ b/CWIdTX.cpp
@@ -22,12 +22,12 @@
 #include "CWIdTX.h"
 
 q15_t TONE[] = {
-    0, 518, 1000, 1414, 1732, 1932, 2000, 1932, 1732, 1414, 1000, 518, 0, -518, -1000, -1414, -1732, -1932, -2000, -1932, -1732, -1414, -1000, -518};
-
+    0, 261, 518, 765, 1000, 1218, 1414, 1587, 1732, 1848, 1932, 1983, 2000, 1983, 1932, 1848, 1732, 1587, 1414, 1218, 1000, 765, 518, 261, 0, -261, -518, -765, -1000, -1218, -1414,
+    -1587, -1732, -1848, -1932, -1983, -2000, -1983, -1932, -1848, -1732, -1587, -1414, -1218, -1000, -765, -518, -261};
 q15_t SILENCE[] = {
-    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 
-const uint8_t CYCLE_LENGTH = 24U;
+const uint8_t CYCLE_LENGTH = 48U;
 
 const uint8_t DOT_LENGTH = 50U;
 
diff --git a/DMRDMORX.h b/DMRDMORX.h
index 6952fd4..344ffa2 100644
--- a/DMRDMORX.h
+++ b/DMRDMORX.h
@@ -22,7 +22,7 @@
 #include "Config.h"
 #include "DMRDefines.h"
 
-const uint16_t DMO_BUFFER_LENGTH_SAMPLES = 1440U;   // 60ms at 24 kHz
+const uint16_t DMO_BUFFER_LENGTH_SAMPLES = 2880U;   // 60ms at 48 kHz
 
 enum DMORX_STATE {
   DMORXS_NONE,
diff --git a/DMRSlotRX.cpp b/DMRSlotRX.cpp
index 0d34560..2e906b1 100644
--- a/DMRSlotRX.cpp
+++ b/DMRSlotRX.cpp
@@ -22,8 +22,8 @@
 #include "DMRSlotType.h"
 #include "Utils.h"
 
-const uint16_t SCAN_START = 400U;
-const uint16_t SCAN_END   = 490U;
+const uint16_t SCAN_START = 790U;
+const uint16_t SCAN_END   = 920U;
 
 const q15_t SCALING_FACTOR = 19505;      // Q15(0.60)
 
@@ -97,7 +97,7 @@ bool CDMRSlotRX::processSample(q15_t sample, uint16_t rssi)
     return m_state != DMRRXS_NONE;
 
   // Ensure that the buffer doesn't overflow
-  if (m_dataPtr > m_endPtr || m_dataPtr >= 900U)
+  if (m_dataPtr > m_endPtr || m_dataPtr >= 1900U)
     return m_state != DMRRXS_NONE;
 
   m_buffer[m_dataPtr] = sample;
diff --git a/DMRSlotRX.h b/DMRSlotRX.h
index a47cc73..e57e4f3 100644
--- a/DMRSlotRX.h
+++ b/DMRSlotRX.h
@@ -44,7 +44,7 @@ public:
 private:
   bool        m_slot;
   uint32_t    m_bitBuffer[DMR_RADIO_SYMBOL_LENGTH];
-  q15_t       m_buffer[900U];
+  q15_t       m_buffer[1900U];
   uint16_t    m_bitPtr;
   uint16_t    m_dataPtr;
   uint16_t    m_syncPtr;
diff --git a/IO.cpp b/IO.cpp
index 474d5eb..a6e1eec 100644
--- a/IO.cpp
+++ b/IO.cpp
@@ -167,7 +167,7 @@ void CIO::process()
   m_ledCount++;
   if (m_started) {
     // Two seconds timeout
-    if (m_watchdog >= 48000U) {
+    if (m_watchdog >= 96000U) {
       if (m_modemState == STATE_DSTAR || m_modemState == STATE_DMR || m_modemState == STATE_YSF) {
         if (m_modemState == STATE_DMR && m_tx)
           dmrTX.setStart(false);
@@ -178,13 +178,13 @@ void CIO::process()
       m_watchdog = 0U;
     }
 
-    if (m_ledCount >= 24000U) {
+    if (m_ledCount >= 48000U) {
       m_ledCount = 0U;
       m_ledValue = !m_ledValue;
       setLEDInt(m_ledValue);
     }
   } else {
-    if (m_ledCount >= 240000U) {
+    if (m_ledCount >= 480000U) {
       m_ledCount = 0U;
       m_ledValue = !m_ledValue;
       setLEDInt(m_ledValue);
diff --git a/SerialPort.cpp b/SerialPort.cpp
index b707c36..5b38e4a 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -73,9 +73,9 @@ const uint8_t MMDVM_DEBUG5       = 0xF5U;
 
 
 #if defined(EXTERNAL_OSC)
-#define DESCRIPTION              "MMDVM 20170501 TCXO (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
+#define DESCRIPTION              "MMDVM 20170501 TCXO 48kHz (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
 #else
-#define DESCRIPTION              "MMDVM 20170501 (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
+#define DESCRIPTION              "MMDVM 20170501 48kHz (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
 #endif
 
 #if defined(GITVERSION)