diff --git a/main.c b/main.c
index e416c09..9347a0f 100644
--- a/main.c
+++ b/main.c
@@ -2704,13 +2704,15 @@ int main(void)
 //    menu_mode_cb(setting.mode,0);
 //  }
   redraw_frame();
-
   set_mode(M_HIGH);
+  set_sweep_frequency(ST_STOP, (uint32_t) 30000000);
   sweep(true);
   osalThreadSleepMilliseconds(100);
 
   set_mode(M_LOW);
+  set_sweep_frequency(ST_STOP, (uint32_t) 4000000);
   sweep(true);
+  set_sweep_frequency(ST_STOP, (uint32_t) 35000000);
 
   set_refer_output(-1);
 //  ui_mode_menu();       // Show menu when autostarting mode
diff --git a/si4432.c b/si4432.c
index f71cff2..8beccae 100644
--- a/si4432.c
+++ b/si4432.c
@@ -192,7 +192,7 @@ void SI4432_Transmit(int d)
   SI4432_Write_Byte( 0x07, 0x02);
   chThdSleepMilliseconds(20);
   SI4432_Write_Byte( 0x07, 0x0b);
-  chThdSleepMilliseconds(30);
+  chThdSleepMilliseconds(100);
   while (count++ < 100 && ( SI4432_Read_Byte ( 0x02 ) & 0x03 ) != 2) {
     chThdSleepMilliseconds(10);
   }
@@ -207,7 +207,7 @@ void SI4432_Receive(void)
   SI4432_Write_Byte( 0x07, 0x02);
   chThdSleepMilliseconds(20);
   SI4432_Write_Byte( 0x07, 0x07);
-  chThdSleepMilliseconds(30);
+  chThdSleepMilliseconds(100);
   while (count++ < 100 && ( SI4432_Read_Byte ( 0x02 ) & 0x03 ) != 1) {
     chThdSleepMilliseconds(5);
   }