diff --git a/slsDetectorServers/ctbDetectorServer/Makefile b/slsDetectorServers/ctbDetectorServer/Makefile
index 57505e19b..e996e0f00 100755
--- a/slsDetectorServers/ctbDetectorServer/Makefile
+++ b/slsDetectorServers/ctbDetectorServer/Makefile
@@ -1,6 +1,6 @@
 CROSS  		= bfin-uclinux-
 CC    		= $(CROSS)gcc
-CFLAGS		+=  -Wall -DCHIPTESTBOARDD  -DSTOP_SERVER -DDEBUG1 #-DJCTB -DVERBOSEI #-DVERBOSE
+CFLAGS		+=  -Wall -DCHIPTESTBOARDD  -DSTOP_SERVER #-DDEBUG1 #-DJCTB -DVERBOSEI #-DVERBOSE
 LDLIBS		+= 	-lm  -lstdc++
 
 PROGS		= 	ctbDetectorServer 
diff --git a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer
index 066549fcc..f0f2fbc3f 100755
Binary files a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer and b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer differ
diff --git a/slsDetectorServers/slsDetectorServer/AD9257.h b/slsDetectorServers/slsDetectorServer/AD9257.h
index 87c096309..52e9f3d1a 100755
--- a/slsDetectorServers/slsDetectorServer/AD9257.h
+++ b/slsDetectorServers/slsDetectorServer/AD9257.h
@@ -119,6 +119,7 @@
 #define AD9257_VREF_REG				(0x18)
 #define AD9257_VREF_OFST			(0)
 #define AD9257_VREF_MSK				(0x00000007 << AD9257_VREF_OFST)
+#define AD9257_VREF_DEFAULT_VAL		(AD9257_VREF_2_0_VAL)
 #define AD9257_VREF_1_0_VAL         ((0x0 << AD9257_VREF_OFST) & AD9257_VREF_MSK)
 #define AD9257_VREF_1_14_VAL        ((0x1 << AD9257_VREF_OFST) & AD9257_VREF_MSK)
 #define AD9257_VREF_1_33_VAL        ((0x2 << AD9257_VREF_OFST) & AD9257_VREF_MSK)
@@ -130,6 +131,7 @@ uint32_t AD9257_CsMask = 0x0;
 uint32_t AD9257_ClkMask = 0x0;
 uint32_t AD9257_DigMask = 0x0;
 int AD9257_DigOffset = 0x0;
+int AD9257_VrefVoltage = 0;
 
 /**
  * Set Defines
@@ -158,19 +160,84 @@ void AD9257_Disable() {
 }
 
 /**
- * Get max valid vref value
- * @param get max vref voltage unit (4 for 2.0V)
+ * Get vref voltage
  */
-int AD9257_GetMaxValidVref() {
-    return 0x4;
+int AD9257_GetVrefVoltage(int mV) {
+	if (mV == 0) 
+		return AD9257_VrefVoltage;
+	switch(AD9257_VrefVoltage) {
+		case 0:
+			return 1000;
+		case 1:
+			return 1140;
+		case 2:
+			return 1330;
+		case 3:
+			return 1600;
+		case 4:
+			return 2000;
+		default:
+			FILE_LOG(logERROR, ("Could not convert Adc Vpp from mode to mV\n"));
+			return -1;
+	}
 }
 
 /**
  * Set vref voltage
  * @param val voltage to be set (0 for 1.0V, 1 for 1.14V, 2 for 1.33V, 3 for 1.6V, 4 for 2.0V
+ * @returns ok or fail
  */
-void AD9257_SetVrefVoltage(int val) {
-    AD9257_Set(AD9257_VREF_REG, val);
+int AD9257_SetVrefVoltage(int val, int mV) {
+	int mode = val;
+	// convert to mode
+	if (mV) {
+		switch(val) {
+			case 1000:	
+				mode = 0;
+				break;
+			case 1140:
+				mode = 1;
+				break;
+			case 1330:
+				mode = 2;
+				break;	
+			case 1600:
+				mode = 3;
+				break;
+			case 2000:
+				mode = 4;
+				break;
+			// validation for mV
+			default:
+				FILE_LOG(logERROR, ("mv:%d doesnt exist\n", val));
+				return FAIL;
+		}
+	} 
+
+	// validation for mode
+	switch(mode) {
+		case 0:
+			FILE_LOG(logINFO, ("Setting ADC Vref to 1.0 V (Mode:%d)\n", mode));
+			break;
+		case 1:
+			FILE_LOG(logINFO, ("Setting ADC Vref to 1.14 V (Mode:%d)\n", mode));
+			break;
+		case 2:
+			FILE_LOG(logINFO, ("Setting ADC Vref to 1.33 V (Mode:%d)\n", mode));
+			break;
+		case 3:
+			FILE_LOG(logINFO, ("Setting ADC Vref to 1.6 V (Mode:%d)\n", mode));
+			break;
+		case 4:
+			FILE_LOG(logINFO, ("Setting ADC Vref to 2.0 V (Mode:%d)\n", mode));
+			break;
+		default:
+			return FAIL;
+	}
+	// set vref voltage
+    AD9257_Set(AD9257_VREF_REG, mode);
+	AD9257_VrefVoltage = mode;
+	return OK;
 }
 
 /**
@@ -244,4 +311,7 @@ void AD9257_Configure(){
 	AD9257_Set(AD9257_TEST_MODE_REG, AD9257_TST_MXD_BT_FRQ_VAL);
 #endif
 
+	// set default value again (to remember the value set)
+	AD9257_SetVrefVoltage(AD9257_VREF_DEFAULT_VAL, 0);
+
 }
diff --git a/slsDetectorServers/slsDetectorServer/slsDetectorFunctionList.h b/slsDetectorServers/slsDetectorServer/slsDetectorFunctionList.h
index 57aad1b21..c54a96777 100755
--- a/slsDetectorServers/slsDetectorServer/slsDetectorFunctionList.h
+++ b/slsDetectorServers/slsDetectorServer/slsDetectorFunctionList.h
@@ -166,8 +166,8 @@ extern void AD9252_Set(int addr, int val);      // AD9252.h (old board)
 extern void AD9257_Set(int addr, int val);      // AD9257.h
 #endif
 #if defined(CHIPTESTBOARDD) || defined(MOENCHD)
-extern int AD9257_GetMaxValidVref();                   // AD9257.h
-extern void AD9257_SetVrefVoltage(int val);             // AD9257.h
+extern int AD9257_GetVrefVoltage(int mV);                  // AD9257.h
+extern int AD9257_SetVrefVoltage(int val, int mV);   // AD9257.h
 #endif
 
 void 		setDAC(enum DACINDEX ind, int val, int mV);
diff --git a/slsDetectorServers/slsDetectorServer/slsDetectorServer_funcs.c b/slsDetectorServers/slsDetectorServer/slsDetectorServer_funcs.c
index 97b9f99bd..7c318bc9c 100755
--- a/slsDetectorServers/slsDetectorServer/slsDetectorServer_funcs.c
+++ b/slsDetectorServers/slsDetectorServer/slsDetectorServer_funcs.c
@@ -333,7 +333,7 @@ void function_table() {
 
 	int iloop = 0;
 	for (iloop = 0; iloop < NUM_DET_FUNCTIONS ; ++iloop) {
-		FILE_LOG(logDEBUG1, ("function fnum=%d, (%s)\n", iloop,
+		FILE_LOG(logDEBUG3, ("function fnum=%d, (%s)\n", iloop,
 				getFunctionName((enum detFuncs)iloop)));
 	}
 }
@@ -793,14 +793,17 @@ int set_dac(int file_des) {
     		// adc vpp
 #if defined(CHIPTESTBOARDD) || defined(MOENCHD)
     		case ADC_VPP:
-    		if (val < 0 || val > AD9257_GetMaxValidVref())  {
-    		    ret = FAIL;
-                sprintf(mess,"Could not set dac. Adc Vpp value should be between 0 and %d\n", AD9257_GetMaxValidVref());
-                FILE_LOG(logERROR,(mess));
-    		} else {
-    		    AD9257_SetVrefVoltage(val);
-    		    retval = val; // cannot read
-    		}
+			// set
+    		if (val >= 0)  {
+				ret = AD9257_SetVrefVoltage(val, mV);
+    		    if (ret == FAIL) {
+					sprintf(mess,"Could not set Adc Vpp. Please set a proper value\n");
+					FILE_LOG(logERROR,(mess));
+				}
+    		} 
+			retval = AD9257_GetVrefVoltage(mV);
+			FILE_LOG(logDEBUG1, ("Adc Vpp retval: %d %s\n", retval, (mV ? "mV" : "mode")));
+			// cannot validate (its just a variable and mv gives different value)
     		break;
 #endif
 
diff --git a/slsSupportLib/include/versionAPI.h b/slsSupportLib/include/versionAPI.h
index dc7f48b13..b31d1f42a 100644
--- a/slsSupportLib/include/versionAPI.h
+++ b/slsSupportLib/include/versionAPI.h
@@ -6,5 +6,5 @@
 #define APILIB 0x190405
 #define APIRECEIVER 0x190405
 #define APIGUI 0x190405
-#define APICTB 0x190514
 #define APIEIGER 0x190514
+#define APICTB 0x190514