diff --git a/nanovna.h b/nanovna.h
index e20b8bd..f77140e 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -679,6 +679,7 @@ typedef struct setting
   int step_delay_mode;
   int offset_delay;
   int fast_speedup;
+  float normalize_level;     // Level to set normalize to, zero if not doing anything
   uint32_t checksum;
 }setting_t;
 
diff --git a/sa_core.c b/sa_core.c
index 16121bc..7d12181 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -79,6 +79,7 @@ void reset_settings(int m)
   setting.show_stored = 0;
   setting.auto_attenuation = false;
   setting.subtract_stored = 0;
+  setting.normalize_level = 0.0;
   setting.drive=13;
   setting.atten_step = 0;       // Only used in low output mode
   setting.agc = S_AUTO_ON;
@@ -455,6 +456,7 @@ void set_subtract_storage(void)
     if (!setting.show_stored)
       set_storage();
     setting.subtract_stored = true;
+    setting.normalize_level = 0.0;
 //    setting.auto_attenuation = false;
   } else {
     setting.subtract_stored = false;
@@ -470,6 +472,7 @@ void toggle_normalize(void)
       stored_t[i] = actual_t[i];
     setting.subtract_stored = true;
     setting.auto_attenuation = false;       // Otherwise noise level may move leading to strange measurements
+    setting.normalize_level = 0.0;
   } else {
     setting.subtract_stored = false;
   }
@@ -1630,7 +1633,7 @@ pureRSSI_t perform(bool break_on_operation, int i, uint32_t f, int tracking)
         local_IF = spur_alternate_IF;
 #ifdef __SPUR__
       } else if (setting.mode== M_LOW && setting.spur){         // If in low input mode and spur reduction is on
-        if (S_IS_AUTO(setting.below_IF) /* && lf < 150000000 */ ) // if below 150MHz and auto_below_IF  <-------------------TODO ---------------------
+        if (S_IS_AUTO(setting.below_IF) && (lf < local_IF / 2  || lf > local_IF) ) // if below 150MHz and auto_below_IF  <-------------------TODO ---------------------
         {              // else low/above IF
           if (setting.spur == 1)
             setting.below_IF = S_AUTO_ON;               // use below IF in first pass
@@ -1928,7 +1931,7 @@ sweep_again:                                // stay in sweep loop when output mo
       if (setting.average != AV_OFF)
         temp_t[i] = RSSI;
       if (setting.subtract_stored) {
-        RSSI = RSSI - stored_t[i] ;
+        RSSI = RSSI - stored_t[i] + setting.normalize_level;
       }
 #ifdef __DEBUG_AGC__                 // For debugging the AGC control
       stored_t[i] = (SI4432_Read_Byte(0x69) & 0x0f) * 3.0 - 90.0; // Display the AGC value in the stored trace
diff --git a/si4432.c b/si4432.c
index 0669f58..05180de 100644
--- a/si4432.c
+++ b/si4432.c
@@ -984,10 +984,12 @@ void ADF4351_enable_output(void)
     ADF4351_Set(0);
 }
 
-void ADF4351_set_frequency(int channel, unsigned long freq, int drive)  // freq / 10Hz
+void ADF4351_set_frequency(int channel, uint32_t freq, int drive)  // freq / 10Hz
 {
-  freq -= 71000;
-  ADF4351_prep_frequency(channel,freq, drive);
+//  freq -= 71000;
+
+  uint32_t offs = ((freq / 1000)* 39) / 1000;
+  ADF4351_prep_frequency(channel,freq + offs, drive);
 //START_PROFILE;
   ADF4351_Set(channel);
 //STOP_PROFILE;
@@ -1463,11 +1465,11 @@ void setState(si446x_state_t newState)
 
 int16_t Si446x_RSSI(void)
 {
-//  Si446x_getInfo(&SI4463_info);
+
+//  int s = Si446x_getInfo(&SI4463_info);
 
 //  if (s != SI446X_STATE_RX)
-//    SI4463_start_rx(90);
-//  SI4463_start_rx(90);
+//    SI4463_start_rx(0);
 
   uint8_t data[3] = {
         SI446X_CMD_GET_MODEM_STATUS,
@@ -1715,7 +1717,9 @@ void SI4463_set_freq(uint32_t freq, uint32_t step_size)
 {
   int Odiv;
   int D;
-  float RFout=freq/1000000.0;  // To MHz
+  uint32_t offs = ((freq / 1000)* 195) / 1000;
+
+  float RFout=(freq+offs)/1000000.0;  // To MHz
   if (RFout >= 820) {       // till 1140MHz
     Odiv = 8;
     D = 2;
diff --git a/ui_sa.c b/ui_sa.c
index 0d8156b..3aa37b8 100644
--- a/ui_sa.c
+++ b/ui_sa.c
@@ -894,6 +894,12 @@ static UI_FUNCTION_ADV_CALLBACK(menu_storage_acb)
       break;
     case 3:
       toggle_normalize();
+      if (setting.subtract_stored) {
+        kp_help_text = "Ref level";
+        ui_mode_keypad(KM_REFLEVEL);
+        ui_process_keypad();
+//        setting.normalize_level = uistat.value;
+      }
       break;
   }
   ui_mode_normal();