diff --git a/rpitx.py b/rpitx.py
index 829c5115..c6937463 100644
--- a/rpitx.py
+++ b/rpitx.py
@@ -388,7 +388,8 @@ if __name__ == "__main__":
 			print("turn on FM rx")
 			output(pd, 1)
 			output(ptt, 1)
-			system("sudo nc -l 8080 | csdr convert_i16_f | csdr fir_interpolate_cc 2 | csdr dsb_fc | csdr bandpass_fir_fft_cc 0.002 0.06 0.01 | csdr fastagc_ff | sudo /home/pi/rpitx/sendiq -i /dev/stdin -s 96000 -f 434.9e6 -t float &")
+			if (command_tx == True):
+				system("sudo nc -l 8080 | csdr convert_i16_f | csdr fir_interpolate_cc 2 | csdr dsb_fc | csdr bandpass_fir_fft_cc 0.002 0.06 0.01 | csdr fastagc_ff | sudo /home/pi/rpitx/sendiq -i /dev/stdin -s 96000 -f 434.9e6 -t float &")
 			print("Turning LED on/off and listening for carrier")
 			while 1:
 				output(txLed, txLedOff)