GarageYears said:
Yes, they do go into standby as soon as the code selector knobs or buttons are active. In the case of the keypad, it releases as soon as the 4th digit is entered, and the rotary has a 3-5 sec timeout.
If it had a digital keypad and someone started entering a new four digit code but did not complete the entry (became incapacitated or just distracted by a bigger problem) does the transponder time-out and go back to the old code or just sit there in standby waiting for the last digit which never comes??