diff --git a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer
index a52a40b9c..0d314ffb4 100755
Binary files a/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer and b/slsDetectorServers/ctbDetectorServer/bin/ctbDetectorServer_developer differ
diff --git a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
index e41569764..2cca46fb4 100644
--- a/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
+++ b/slsDetectorServers/ctbDetectorServer/slsDetectorFunctionList.c
@@ -1793,7 +1793,8 @@ int getPowerADC(enum powerIndex index, int *retval, char *mess) {
 #ifdef VIRTUAL
     return 0;
 #endif
-    *retval = bus_r(POWER_MONITOR_BASE_REG + ((int)adcIndex << MEM_MAP_SHIFT));
+    // read register containing the measurement (16-bit signed), sign extend to int
+    *retval = (int)(int16_t)bus_r(POWER_MONITOR_BASE_REG + ((int)adcIndex << MEM_MAP_SHIFT));
     return OK;
 }
 
diff --git a/slsDetectorServers/ctbDetectorServer/slsDetectorServer_defs.h b/slsDetectorServers/ctbDetectorServer/slsDetectorServer_defs.h
index c18d9fc06..aeb66b82c 100644
--- a/slsDetectorServers/ctbDetectorServer/slsDetectorServer_defs.h
+++ b/slsDetectorServers/ctbDetectorServer/slsDetectorServer_defs.h
@@ -5,7 +5,7 @@
 #include "sls/sls_detector_defs.h"
 
 #define MIN_REQRD_VRSN_T_RD_API 0x181130
-#define REQRD_FRMWR_VRSN        0x230705
+#define REQRD_FRMWR_VRSN        0x260504
 
 #define NUM_HARDWARE_VERSIONS (1)
 #define HARDWARE_VERSION_NUMBERS                                               \