diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index e049231b..9af1c733 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -2775,8 +2775,8 @@ void start_isr() {
 	pinMode(BPSK_CONTROL_A, OUTPUT);
 	pinMode(BPSK_CONTROL_B, OUTPUT);	
 	
-//  if (ITimer0.attachInterruptInterval(833, TimerHandler0))	
-  if (ITimer0.attachInterruptInterval(1667, TimerHandler0))
+  if (ITimer0.attachInterruptInterval(833, TimerHandler0))	
+//  if (ITimer0.attachInterruptInterval(1667, TimerHandler0))
   {
     Serial.print(F("Starting ITimer0 OK, micros() = ")); Serial.println(micros());
   }