diff --git a/transmit.py b/transmit.py
index 32bb851c..dd9b4633 100644
--- a/transmit.py
+++ b/transmit.py
@@ -539,11 +539,20 @@ def update_doppler():
 		print(f"Tx Doppler shift: {tx_doppler_freq_hz:.0f}")
 		rx_doppler_freq_hz = rx_doppler_start_hz + rx_doppler_shift_hz
 		print(f"Rx Doppler shift: {rx_doppler_freq_hz:.0f}")
-		rx = "{:.4f}".format(rx_doppler_freq_hz/1e6)
+		try:
+			rx = "{:.4f}".format(rx_doppler_freq_hz/1e6)
+		except:
+			print("1")
 		if (mode == 'e'):
-			tx = "{:.4f}".format(tx_doppler_freq_hz/1e6)
+			try:
+				tx = "{:.4f}".format(tx_doppler_freq_hz/1e6)
+			except:
+				print("2")	
 			print(tx)
-		program_fm(rx,tx,rxpl_value,sq,txpl_value)
+		try:	
+			program_fm(rx,tx,rxpl_value,sq,txpl_value)
+		except:
+			print("3")
 	except:
 		print("update_doppler failed")