#define DEFAULT_FRAMESIZE FRAMESIZE_SMALL
#define DEFAULT_TIMEBASE TIME_100us
#define DEFAULT_TRIGGER_SOURCE "CH1"
-#define DEFAULT_COUPLING COUPLING_AC
+#define DEFAULT_COUPLING COUPLING_DC
#define DEFAULT_HORIZ_TRIGGERPOS 0.5
#define DEFAULT_VERT_OFFSET 0.5
#define DEFAULT_VERT_TRIGGERPOS 0.5