diff --git a/SerialPort.cpp b/SerialPort.cpp
index 75b99b3..1746492 100644
--- a/SerialPort.cpp
+++ b/SerialPort.cpp
@@ -72,9 +72,9 @@ const uint8_t MMDVM_DEBUG5       = 0xF5U;
 
 
 #if defined(EXTERNAL_OSC)
-#define DESCRIPTION              "MMDVM 20170303 TCXO (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
+#define DESCRIPTION              "MMDVM 20170406 TCXO (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
 #else
-#define DESCRIPTION              "MMDVM 20170303 (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
+#define DESCRIPTION              "MMDVM 20170406 (D-Star/DMR/System Fusion/P25/RSSI/CW Id)"
 #endif
 #define concat(a, b, c) a " (Build: " b " " c ")"
 const char HARDWARE[] = concat(DESCRIPTION, __TIME__, __DATE__);
diff --git a/YSFTX.cpp b/YSFTX.cpp
index 25ed282..a5a8b92 100644
--- a/YSFTX.cpp
+++ b/YSFTX.cpp
@@ -37,15 +37,15 @@ static q15_t YSF_C4FSK_FILTER[] = {0, 0, 0, 0, 401, 104, -340, -731, -847, -553,
 const uint16_t YSF_C4FSK_FILTER_PHASE_LEN = 9U;                       // phaseLength = numTaps/L
 #endif
 
-const q15_t YSF_LEVELA_HI =  3510;
-const q15_t YSF_LEVELB_HI =  1170;
-const q15_t YSF_LEVELC_HI = -1170;
-const q15_t YSF_LEVELD_HI = -3510;
+const q15_t YSF_LEVELA_HI =  3900;
+const q15_t YSF_LEVELB_HI =  1300;
+const q15_t YSF_LEVELC_HI = -1300;
+const q15_t YSF_LEVELD_HI = -3900;
 
-const q15_t YSF_LEVELA_LO =  1755;
-const q15_t YSF_LEVELB_LO =  585;
-const q15_t YSF_LEVELC_LO = -585;
-const q15_t YSF_LEVELD_LO = -1755;
+const q15_t YSF_LEVELA_LO =  1950;
+const q15_t YSF_LEVELB_LO =  650;
+const q15_t YSF_LEVELC_LO = -650;
+const q15_t YSF_LEVELD_LO = -1950;
 
 const uint8_t YSF_START_SYNC = 0x77U;
 const uint8_t YSF_END_SYNC   = 0xFFU;