Disable AM modulation in high output

sa_core.c

@@ -2590,7 +2590,7 @@ void self_test(int test)
 
     sweep_mode = SWEEP_ENABLE;
     show_test_info = FALSE;
-    set_refer_output(0);
+    set_refer_output(-1);
     reset_settings(M_LOW);
     in_selftest = false;
   }

ui_sa.c

@@ -1158,11 +1158,11 @@ static const menuitem_t menu_drive_wide[] = {
 const menuitem_t  menu_modulation[] = {
   { MT_FORM | MT_TITLE,    0,  "MODULATION",NULL},
   { MT_FORM | MT_CALLBACK, MO_NONE,     "NONE",      menu_modulation_cb},
-  { MT_FORM | MT_CALLBACK, MO_AM_1kHz,  "AM 1kHz",   menu_modulation_cb},
-  { MT_FORM | MT_CALLBACK, MO_AM_10Hz,  "AM 10Hz",   menu_modulation_cb},
+  { MT_FORM | MT_CALLBACK | MT_LOW, MO_AM_1kHz,  "AM 1kHz",   menu_modulation_cb},
+  { MT_FORM | MT_CALLBACK | MT_LOW, MO_AM_10Hz,  "AM 10Hz",   menu_modulation_cb},
   { MT_FORM | MT_CALLBACK, MO_NFM,      "NARROW FM", menu_modulation_cb},
   { MT_FORM | MT_CALLBACK, MO_WFM,      "WIDE FM",   menu_modulation_cb},
-  { MT_FORM | MT_CALLBACK, MO_EXTERNAL, "EXTERNAL",  menu_modulation_cb},
+  { MT_FORM | MT_CALLBACK | MT_LOW, MO_EXTERNAL, "EXTERNAL",  menu_modulation_cb},
   { MT_FORM | MT_CANCEL,   0,             "\032 BACK",NULL },
   { MT_FORM | MT_NONE, 0, NULL, NULL } // sentinel
 };