Hi guys
This is a signal generator that pulse width and pulse rate and the frequency was set up in it.
And the frequency was calculated hundredths
Many examples of existing sites
This system has worked as practical
The ability to detect metal under 1 meter they do not and 20% more efficient
By a test signal generator real friends can take performance over 50%
https://www.google.com/search?q=buy+...or+1hz+to+1mhz