keep PD low until AFSK is selected

cubesatsim/cubesatsim.ino

@@ -173,8 +173,10 @@ void send_packet() {
 }
 
 void transmit_on() {
+  if (mode == AFSK) {	
     digitalWrite(MAIN_LED_BLUE, HIGH);	
     digitalWrite(PTT_PIN, LOW);
+  }
 }
 
 void transmit_off() {
@@ -1733,11 +1735,15 @@ void config_radio()
   digitalWrite(PTT_PIN, HIGH);
 
   pinMode(PD_PIN, OUTPUT);  // PD active HIGH
-  digitalWrite(PD_PIN, HIGH);
+  digitalWrite(PD_PIN, LOW);  
 
   pinMode(TEMPERATURE_PIN, INPUT);
   pinMode(AUDIO_IN_PIN, INPUT);
 	
+  if (mode == AFSK) {
+	  
+    digitalWrite(PD_PIN, HIGH);  // Enable SR_FRS  	  
+
     DumbTXSWS mySerial(SWTX_PIN); // TX pin
     mySerial.begin(9600);
     
@@ -1750,7 +1756,7 @@ void config_radio()
 //   mySerial.println("AT+DMOSETMIC=6,0\r");  
   }
   	
-  if (mode == FSK)	  {
+  } else if (mode == FSK)	  {
     transmit_on();
   } else if (mode == BPSK)  {
     start_pwm();