diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index f6215d47..c84b145a 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -301,7 +301,8 @@ bool TimerHandler0(struct repeating_timer *t);
 RPI_PICO_Timer ITimer0(0);
 RPI_PICO_Timer ITimer1(0);
 
-int morse_timing = 100;
+int morse_timing = 100;  // ms for a dit
+int morse_freq = 800;  // Hz
 int morse_table[44][5] = {  // 0-9, A-Z only by (ASCII - 48)
   { 3, 3, 3, 3, 3 },	// 0		
   { 1, 3, 3, 3, 3 },	// 1