diff --git a/NANOVNA_STM32_F072/board.h b/NANOVNA_STM32_F072/board.h
index 7d5a539..f228585 100644
--- a/NANOVNA_STM32_F072/board.h
+++ b/NANOVNA_STM32_F072/board.h
@@ -117,7 +117,6 @@
  * PA13 - SWDIO                     (alternate 0).
  * PA14 - SWCLK                     (alternate 0).
  */
-#define __ULTRA_SA__
 #ifdef __ULTRA_SA__
 #define PIN_MOD_ULTRA(X)   PIN_MODE_OUTPUT(X)
 #else
diff --git a/main.c b/main.c
index b119432..2ef1f60 100644
--- a/main.c
+++ b/main.c
@@ -2255,7 +2255,9 @@ VNA_SHELL_FUNCTION(cmd_x)
    reg &= ~0xc00000;    // Force led to show lock
    reg |=  0x400000;
   }
+#ifdef __ULTRA_SA__
   ADF4351_WriteRegister32(VFO, reg);
+#endif
   shell_printf("x=%x\r\n", reg);
 }
 
@@ -2757,9 +2759,9 @@ int main(void)
   int i = sdReadTimeout(&SD1,buf,10,TIME_IMMEDIATE);
 
 #endif
-
+#ifdef __ULTRA_SA__
   ADF4351_Setup();
-
+#endif
   /*
  * SPI LCD Initialize
  */
diff --git a/nanovna.h b/nanovna.h
index 61e9c95..6fbc161 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -30,8 +30,9 @@
 #define __MEASURE__
 #define __SELFTEST__
 #define __CALIBRATE__
-#define __ULTRA__
-#define __ULTRA_SA__
+//#define __ULTRA__             // Add harmonics mode on low input.
+//#define __ULTRA_SA__            // Adds ADF4351 control for extra high 1st IF stage
+
 
 /*
  * main.c
diff --git a/sa_core.c b/sa_core.c
index 7ffb79c..e345b96 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -105,8 +105,13 @@ void reset_settings(int m)
     set_sweep_frequency(ST_SPAN, 0);
     break;
   case M_HIGH:
+#ifdef __ULTRA_SA__
     minFreq = 00000000;
     maxFreq = 2000000000;
+#else
+    minFreq = 240000000;
+    maxFreq = 960000000;
+#endif
     set_sweep_frequency(ST_START, (int32_t) minFreq);
     set_sweep_frequency(ST_STOP, (int32_t) maxFreq);
     break;
@@ -526,8 +531,10 @@ void setFreq(int V, unsigned long freq)
     if (V <= 1) {
       SI4432_Sel = V;
       SI4432_Set_Frequency(freq);
+#ifdef __ULTRA_SA__
     } else {
       ADF4351_set_frequency(V-2,freq,3);
+#endif
     }
     old_freq[V] = freq;
   }
@@ -959,14 +966,17 @@ again:
     } else
 #endif
     {
+#ifdef __ULTRA_SA__
 //#define IF_1    2550000000
 #define IF_2    2025000000
 
-     setFreq (3, IF_2 - 433800000);
-      setFreq (2, IF_2 + lf);
-     setFreq (1, 433800000);
-//      setFreq (1, local_IF+lf);
-     }
+       setFreq (3, IF_2 - 433800000);
+       setFreq (2, IF_2 + lf);
+       setFreq (1, 433800000);
+#else
+       setFreq (1, local_IF+lf);
+#endif
+    }
     if (MODE_OUTPUT(setting_mode))              // No substepping in output mode
       return(0);
     float signal_path_loss;
diff --git a/si4432.c b/si4432.c
index 1cffc06..d16ee21 100644
--- a/si4432.c
+++ b/si4432.c
@@ -505,7 +505,6 @@ float Simulated_SI4432_RSSI(uint32_t i, int s)
 #endif
 //------------------------------- ADF4351 -------------------------------------
 
-
 #ifdef __ULTRA_SA__
 
 #define bitRead(value, bit) (((value) >> (bit)) & 0x01)
diff --git a/ui_sa.c b/ui_sa.c
index 81f89c0..9aae4f5 100644
--- a/ui_sa.c
+++ b/ui_sa.c
@@ -890,12 +890,14 @@ static void choose_active_marker(void)
   active_marker = -1;
 }
 
+#ifdef __ULTRA__
 static void menu_harmonic_cb(int item, uint8_t data)
 {
   (void)item;
   set_harmonic(data);
   draw_menu();
 }
+#endif
 
 static void menu_settings2_cb(int item, uint8_t data)
 {
@@ -1495,9 +1497,11 @@ static void menu_item_modify_attribute(
     if (item ==0 && setting_tracking_output){
       mark = true;
     }
+#ifdef __ULTRA__
   } else if (MT_MASK(menu[item].type) == MT_CALLBACK && menu == menu_harmonic) {
     if (data == setting_harmonic)
       mark = true;
+#endif
   } else if (menu == menu_settings2 || menu == menu_settingshigh2) {
     if (item ==0 && setting_agc){
       mark = true;