O'K than, so it's not RF power, this all about AC electrical power.
In my previous post I give universal algorithm.
If you deal with AC,, so change AC power level (current or load).
The idea to solve the puzzle, "black box - device" is:
change input (RF, AC, water, gaz etc) and look at the output.
You have to find a pattern.
No pattern, looks mess before and after - bit-rate is wrong.