3. Transmitting the Signal

To replay the signal you need something that can transmit at 38 KHz. I used my 44Kz capable soundcard to play the signal through a pair of cheap headphones at full volume.

Note: It is not the audible noise that is being decoded by the diver computer, it is the unintentionally radiated electromagnetic field. Using a E field probe would work great to tx and rx the signal. I use speakers because they are easy to find and have many windings.