diff --git a/nanovna.h b/nanovna.h
index e3a0687..ad998a5 100644
--- a/nanovna.h
+++ b/nanovna.h
@@ -68,7 +68,7 @@
 #define DEFAULT_IF  ((uint32_t)977100000)
 #define DEFAULT_SPUR_OFFSET ((uint32_t)1500000)
 #define DEFAULT_MAX_FREQ    ((uint32_t)800000000)
-#define HIGH_MIN_FREQ_MHZ   825
+#define HIGH_MIN_FREQ_MHZ   136// 825
 #define HIGH_MAX_FREQ_MHZ   1130
 #endif
 /*
diff --git a/sa_cmd.c b/sa_cmd.c
index 43e6b69..0441bd5 100644
--- a/sa_cmd.c
+++ b/sa_cmd.c
@@ -532,8 +532,26 @@ VNA_SHELL_FUNCTION(cmd_d)
   (void) argc;
   (void) argv;
   int32_t a = my_atoi(argv[0]);
-  setting.lo_drive=a;
-  dirty = true;
+  int32_t d;
+  if (argc == 2)
+    d = my_atoi(argv[1]);
+  else {
+    d = a;
+    a = 2;
+  }
+  switch (a) {
+  case 1:
+    SI4463_set_output_level(d);
+    break;
+  case 2:
+    ADF4351_drive (d);
+    break;
+  case 3:
+    ADF4351_aux_drive(d);
+    break;
+  }
+//  setting.lo_drive=a;
+//  dirty = true;
 }
 
 #if 0
diff --git a/sa_core.c b/sa_core.c
index 9343e71..3718563 100644
--- a/sa_core.c
+++ b/sa_core.c
@@ -90,10 +90,10 @@ void update_min_max_freq(void)
     break;
   case M_GENHIGH:
     if (high_out_adf4350) {
-      minFreq =  135000000;
+      minFreq =  136000000;
       maxFreq = 4290000000U;
     } else {
-      minFreq =  850000000;
+      minFreq =  136000000;
       maxFreq = 1150000000U;
     }
     break;
@@ -2468,6 +2468,9 @@ modulation_again:
       pureRSSI = SI4432_RSSI(lf, MODE_SELECT(setting.mode));            // Get RSSI, either from pre-filled buffer
 #endif
 #ifdef __SI4463__
+      if (real_old_freq[SI4463_RX] == 0)
+        pureRSSI = 0;
+      else
         pureRSSI = Si446x_RSSI();
 #endif
 //#define __DEBUG_FREQUENCY_SETTING__
diff --git a/si4432.c b/si4432.c
index 7881332..5aa65c8 100644
--- a/si4432.c
+++ b/si4432.c
@@ -2362,30 +2362,29 @@ static int refresh_count = 0;
 uint32_t SI4463_set_freq(uint32_t freq)
 {
 //  SI4463_set_gpio(3,GPIO_HIGH);
-  int S = 4 ;               // Aprox 100 Hz channels
+  int S = 4 ;               // Approx 100 Hz channels
   SI4463_channel = 0;
-  if (freq >= 822000000 && freq <= 1140000000)         {       // till 1140MHz
+  if (freq >= 822000000 && freq <= 1130000000)         {       // 822 to 1130MHz
     SI4463_band = 0;
     SI4463_outdiv = 4;
-#if 0       // band 4 does not function
-  } else if (freq >= 568000000 && freq <= 758000000 ) {    // works till 758MHz
-    SI4463_band = 4;
-    SI4463_outdiv = 6;
-#endif
-  } else if (freq >= 420000000 && freq <= 568000000) {    // works till 568MHz
+  } else if (freq >= 411000000 && freq <= 566000000) {    // 411 to  568MHz
     SI4463_band = 2;
     SI4463_outdiv = 8;
-  } else if (freq >= 329000000 && freq <= 454000000) {    // works till 454MHz
+  } else if (freq >= 329000000 && freq <= 454000000) {    // 329 to 454MHz
     SI4463_band = 1;
     SI4463_outdiv = 10;
-  } else if (freq >= 274000000 && freq <= 339000000) {    // to 339
+  } else if (freq >= 274000000 && freq <= 378000000) {    // 274 to 378
     SI4463_band = 3;
     SI4463_outdiv = 12;
-  } else if (freq >= 136000000 && freq <= 190000000){ // 136 { // To 190
+  } else if (freq >= 137000000 && freq <= 189000000){ // 137 to 189
     SI4463_band = 5;
     SI4463_outdiv = 24;
-  }
-  if (SI4463_band == -1)
+#if 0                           // Band 4, 6 and 7 do not function
+  } else if (freq >= 137000000 && freq <= 189000000){ // 220 to 266
+    SI4463_band = 4;
+    SI4463_outdiv = 12;
+#endif
+  } else
     return 0;
   if (SI4463_offset_active) {
     si_set_offset(0);