diff --git a/main.c b/main.c
index 1e83396..247e2db 100644
--- a/main.c
+++ b/main.c
@@ -652,7 +652,7 @@ ensure_edit_config(void)
   cal_status = 0;
 }
 
-#define DELAY_CHANNEL_CHANGE 1
+#define DELAY_CHANNEL_CHANGE 3
 
 // main loop for measurement
 bool sweep(bool break_on_operation)
@@ -671,7 +671,7 @@ bool sweep(bool break_on_operation)
     (*sample_func)(measured[0][i]);
 
     tlv320aic3204_select(1); // CH1:TRANSMISSION
-    wait_dsp(delay + DELAY_CHANNEL_CHANGE);
+    wait_dsp(DELAY_CHANNEL_CHANGE);
 
     /* calculate transmission coeficient */
     (*sample_func)(measured[1][i]);
diff --git a/si5351.c b/si5351.c
index 76ee744..e1c39b9 100644
--- a/si5351.c
+++ b/si5351.c
@@ -296,7 +296,7 @@ si5351_set_frequency(int channel, int freq, uint8_t drive_strength)
 
 int current_band = -1;
 
-#define DELAY_NORMAL 2
+#define DELAY_NORMAL 3
 #define DELAY_BANDCHANGE 1
 #define DELAY_LOWBAND 1