diff --git a/sa_cmd.c b/sa_cmd.c
index 28692e8..933ed47 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -275,10 +275,6 @@ VNA_SHELL_FUNCTION(cmd_if)
     int a = my_atoi(argv[0]);
     if (a!= 0 &&( a < (DEFAULT_IF - 2000000) || a>(DEFAULT_IF + 2000000)))
       goto usage;
-#ifdef __SI4463__
-    if (a!= 0 &&( a < 977000000 || a>980000000))
-      goto usage;
-#endif
     setting.auto_IF = false;
     set_IF(a);
   }
diff --git a/sa_core.c b/sa_core.c
index 53a7d1a..da5d6f5 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -153,8 +153,9 @@ void reset_settings(int m)
   case M_LOW:
     minFreq = 0;
     maxFreq = 4000000000;
-    set_sweep_frequency(ST_START, (uint32_t) 0);
-    set_sweep_frequency(ST_STOP, (uint32_t) DEFAULT_MAX_FREQ);
+    set_sweep_frequency(ST_START, minFreq);
+    set_sweep_frequency(ST_STOP, maxFreq);
+    set_sweep_frequency(ST_STOP, 800000000);    // TODO <----------------- temp ----------------------
     setting.attenuate = 0.0;    // <---------------- WARNING -----------------
     setting.auto_attenuation = false;   // <---------------- WARNING -----------------
     setting.sweep_time_us = 0;
@@ -174,13 +175,6 @@ void reset_settings(int m)
     setting.sweep_time_us = 10*ONE_SECOND_TIME;
     break;
   case M_HIGH:
-#ifdef __ULTRA_SA__
-    minFreq = 00000000;
-    maxFreq = 2000000000;
-#else
-    minFreq = HIGH_MIN_FREQ_MHZ*(config.setting_frequency_10mhz/10);
-    maxFreq = HIGH_MAX_FREQ_MHZ*(config.setting_frequency_10mhz/10);
-#endif
     set_sweep_frequency(ST_START, minFreq);
     set_sweep_frequency(ST_STOP,  maxFreq);
     setting.sweep_time_us = 0;
@@ -233,12 +227,7 @@ uint32_t calc_min_sweep_time_us(void)         // Estimate minimum sweep time in
 void set_refer_output(int v)
 {
   setting.refer = v;
-#ifdef __SI4432__
   set_calibration_freq(setting.refer);
-#endif
-#ifdef __SI4463__
-  Si4463_set_refer(setting.refer);
-#endif
   //  dirty = true;
 }
 
@@ -1154,8 +1143,6 @@ void setupSA(void)
 #define OFFSET_LOWER_BOUND 0
 #endif
 
-static uint32_t old_frequency_step;
-
 void set_freq(int V, unsigned long freq)    // translate the requested frequency into a setting of the SI4432
 {
   if (old_freq[V] == freq)       // Do not change HW if not needed
@@ -1242,11 +1229,7 @@ void set_freq(int V, unsigned long freq)    // translate the requested frequency
     real_old_freq[V] = ADF4351_set_frequency(V-ADF4351_LO,freq,setting.drive-12);
   } else
     if (V==SI4463_RX) {
-      if (setting.frequency_step<930000)                  // maximum step size is 937.49kHz
-        SI4463_set_freq(freq,setting.frequency_step);
-      else
-        SI4463_set_freq(freq,100);
-      old_frequency_step = setting.frequency_step;
+      SI4463_set_freq(freq);
     }
 #ifdef __ULTRA_SA__
     else {
@@ -1422,13 +1405,12 @@ void update_rbw(void)           // calculate the actual_rbw and the vbwSteps (#
   if (setting.spur_removal && actual_rbw_x10 > 3000)
     actual_rbw_x10 = 2500;           // if spur suppression reduce max rbw to fit within BPF
   SI4432_Sel =  MODE_SELECT(setting.mode);
-  actual_rbw_x10 = set_rbw(actual_rbw_x10);  // see what rbw the SI4432 can realize
 #endif
 #ifdef __SI4463__
 //  if (setting.spur_removal && actual_rbw_x10 > 3000)      // Will depend on BPF width <------------------ TODO -------------------------
 //    actual_rbw_x10 = 3000;                         // if spur suppression reduce max rbw to fit within BPF
-  actual_rbw_x10 = set_rbw(actual_rbw_x10);  // see what rbw the SI4432 can realize
 #endif
+  actual_rbw_x10 = set_rbw(actual_rbw_x10);  // see what rbw the SI4432 can realize
   if (setting.frequency_step > 0 && MODE_INPUT(setting.mode)) { // When doing frequency scanning in input mode
     vbwSteps = ((int)(2 * (setting.vbw_x10 + (actual_rbw_x10/2)) / actual_rbw_x10)); // calculate # steps in between each frequency step due to rbw being less than frequency step
     if (setting.step_delay_mode==SD_PRECISE)    // if in Precise scanning
@@ -1587,36 +1569,6 @@ static const int spur_table[] =                                 // Frequencies t
  41600000,
  49650000,
 #endif
-#ifdef IF_AT_4339
-  780000,           // 433.9MHz table
-   830000,
-   880000,
-   949000,
-  1390000,
-  1468000,
-  1830000,
-  1900000,
-  2770000,
-  2840000,
-  2880000,
-  4710000,
-  4780000,
-  4800000,
-  4880000,
-  6510000,
-  6750000,
-  6790000,
-  6860000,
-  7340000,
-  8100000,
-  8200000,
-  8880000,
-//  9970000,    10MHz!!!!!!
- 10870000,
- 11420000,
- 14880000,
- 16820000,
-#endif
 };
 
 int binary_search(int f)
diff --git a/si4432.c b/si4432.c
index bd134f4..9963a9a 100644
--- a/si4432.c
+++ b/si4432.c
@@ -1532,7 +1532,7 @@ void SI4463_clear_int_status()
 
 }
 
-void Si4463_set_refer(int ref)
+void set_calibration_freq(int ref)
 {
 
   ref = 0;   // <--------------------- DISABLED FOR PROTOTYPE!!!!!!!!!!!!!!!!!!!!!!!!!
@@ -2063,12 +2063,9 @@ uint16_t set_rbw(uint16_t WISH)  {
 
 static int refresh_count = 0;
 
-void SI4463_set_freq(uint32_t freq, uint32_t step_size)
+void SI4463_set_freq(uint32_t freq)
 {
-  (void) step_size;
-
 //  SI4463_set_gpio(3,GPIO_HIGH);
-
   int S = 4 ;               // Aprox 100 Hz channels
   SI4463_channel = 0;
   if (freq >= 822000000 && freq <= 1140000000)         {       // till 1140MHz