diff --git a/sa_core.c b/sa_core.c
index d0fe648..cec2fd6 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -63,6 +63,7 @@ void reset_settings(int m)
 {
 //  strcpy((char *)spi_buffer, dummy);
   setting.mode = m;
+  sweep_mode |= SWEEP_ENABLE;
   setting.unit_scale_index = 0;
   setting.unit_scale = 1;
   setting.unit = U_DBM;