This mostly seem to center around someone doing analysis of a FRS like radio service. Generally professional radios don't send roger beeps over there air. Not

This mostly seem to center around someone doing analysis of a FRS like radio service. Generally professional radios don't send roger beeps over there air. Not have I ever heard of "STE" - and certainly not as the method described, normally you'd change the phase of the CTCSS tone by 120 degrees, which is the signal to the radio that the transmission ended. The phase reversal method was used because of the amount of time it took vibrasponder reeds to stop vibrating, but changing the phase you could end the vibration faster.