Silly me bought a KKMOON Dual Channel Generator. Nice little generator but it has to be programed. When I used Windows XP I could attach to it and produce a modulated signal. It was a pain programming, instructions not in English. Anywho I no longer have the program and I really want to be able to modulate the signal. My solution may not be the best but it was easy to build and works.
The DBM is simple to build just 3 connectors, 4 diodes and 2 transformers.
It is made on a handy box lid. The 2" X 4" electrical box makes a good rugged project box.
I tried it and it worked well.
I will make some "custom" cables.