diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 77a926ba..2ef9f424 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -275,7 +275,6 @@ void loop() {
 	  
       if (debug_mode)	  	  
         Serial.println("Start transmit!!!");
-      digitalWrite(PD_PIN, HIGH);  // Enable SR_FRS	  
       digitalWrite(PTT_PIN, LOW);  // start transmit
       transmit_led(HIGH);	    
 
@@ -3556,8 +3555,8 @@ void config_gpio() {
   pinMode(BPF_PIN, INPUT_PULLUP);  // Read LPF to see if present
 //  pinMode(SQUELCH, INPUT);	// Squelch from TXC
 
-  if (digitalRead(BPF_PIN) == FALSE) {  
-//  if (digitalRead(BPF_PIN) != FALSE) {  // force BPF present
+//  if (digitalRead(BPF_PIN) == FALSE) {  
+  if (digitalRead(BPF_PIN) != FALSE) {  // force BPF present
     Serial.println("BPF present - transmit enabled");
     filter_present = true;  
   }