Updated M_AM, auto calc of .cor factors and reduced autolevel for 300Hz

main.c

@@ -1012,9 +1012,9 @@ config_t config = {
   .high_correction_frequency = { 10000, 100000, 200000, 500000, 50000000, 140000000, 200000000, 300000000, 330000000, 350000000 },
   .high_correction_value = { 0, 0, 0, 0, 0.0, 0, 0, 0, 0, 0 },
   .setting_frequency_30mhz = 30000000,
-  .cor_am = -14,
-  .cor_wfm = -55,
-  .cor_nfm = -55,
+  .cor_am = 0,
+  .cor_wfm = 0,
+  .cor_nfm = 0,
   .ultra = false,
   .high_out_adf4350 = true,
   .ext_zero_level = 174,
@@ -2966,6 +2966,44 @@ int main(void)
 
   chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO-1, Thread1, NULL);
 
+#ifdef TINYSA4
+  reset_settings(M_LOW);
+  set_mode(M_GENLOW);
+  set_sweep_frequency(ST_CENTER, (freq_t)30000000);
+  set_sweep_frequency(ST_SPAN, (freq_t)0);
+  in_selftest = true;
+
+  if (config.cor_am == 0) {
+    setting.modulation = MO_AM;
+    setting.modulation_frequency = 5000;
+    config.cor_am = 0;
+    perform(false,0, 30000000, false);
+    perform(false,1, 30000000, false);
+    config.cor_am = -(start_of_sweep_timestamp - (ONE_SECOND_TIME / setting.modulation_frequency))/8;
+  }
+
+  if (config.cor_nfm == 0) {
+    setting.modulation = MO_NFM;
+    setting.modulation_frequency = 5000;
+    config.cor_nfm = 0;
+    perform(false,0, 30000000, false);
+    perform(false,1, 30000000, false);
+    config.cor_nfm = -(start_of_sweep_timestamp - (ONE_SECOND_TIME / setting.modulation_frequency))/8;
+  }
+
+  if (config.cor_wfm == 0) {
+    setting.modulation = MO_WFM;
+    setting.modulation_frequency = 5000;
+    config.cor_wfm = 0;
+    perform(false,0, 30000000, false);
+    perform(false,1, 30000000, false);
+    config.cor_wfm = -(start_of_sweep_timestamp - (ONE_SECOND_TIME / setting.modulation_frequency))/8;
+  }
+  in_selftest = false;
+  reset_settings(M_LOW);
+#endif
+
+
   while (1) {
     if (SDU1.config->usbp->state == USB_ACTIVE) {
 #ifdef VNA_SHELL_THREAD

sa_core.c

@@ -3374,7 +3374,7 @@ sweep_again:                                // stay in sweep loop when output mo
 #endif
   // -------------------------- auto attenuate ----------------------------------
 #ifdef TINYSA4
-#define AUTO_TARGET_LEVEL   -30
+#define AUTO_TARGET_LEVEL   (actual_rbw_x10  >= 10 ? -30 : -40)
 #else
 #define AUTO_TARGET_LEVEL   -25
 #endif

ui_sa.c

@@ -987,7 +987,7 @@ static UI_FUNCTION_ADV_CALLBACK(menu_measure_acb)
 //        break;
       span = uistat.value;
 #ifdef TINYSA4
-//      set_RBW(span/300);
+      set_RBW((span * 5 / 50) / 100);
 #endif
       set_sweep_frequency(ST_SPAN, span * 5);
 //      update_frequencies();                     // To ensure markers are positioned right!!!!!!
@@ -1014,7 +1014,7 @@ static UI_FUNCTION_ADV_CALLBACK(menu_measure_acb)
       ui_mode_keypad(KM_SPAN);
       if (uistat.value < 1000 || uistat.value > 10000)
         goto no_measurement;
-      set_RBW(uistat.value/100);
+      set_RBW(uistat.value/300);
 #else
       kp_help_text = "Modulation frequency: 1 .. 2.5kHz";
       ui_mode_keypad(KM_SPAN);