"ZAZ - "Oscilloscope" was precisely the word, the U.S. Navy officer used in the interview."
Nothing wrong with using an oscilloscope to look for a voltage (amplitude) at a particular frequency. If they were looking at a range of frequencies, they'd use a spectrum analyzer. They'd need to look at the 37.5khz, since it's beyond human hearing range, unless they down convert it to human hearing range.
Last edited by Coagie; 27th Mar 2014 at 05:01.
Reason: Adding a space.