Patent ID: 7222042

Claim:
A method for measuring a turn-off time of an electronic device, the method comprising: generating a first bit sequence by reference to a controlling pattern; transmitting the first bit sequence to the electronic device; receiving the first bit sequence from the electronic device and a second bit sequence generated by reference to the controlling pattern; commanding a disablement of the electronic device after initiating said generating step; comparing bit groups from the first bit sequence from the electronic device to corresponding bit groups in the second bit sequence, said comparing step beginning when said commanding step is executed; maintaining a count that is incremented each time said comparing step is executed; storing each bit group from the first bit sequence from the electronic device that does not match a corresponding bit group in the second bit sequence along with a corresponding value of the count; terminating said comparing step when a bit group from the first bit sequence from the electronic device indicates that the electronic device is turned off; and computing the turn-off time by reference to at least one stored bit group and corresponding value of the count.