This is my first post and hope I'm in the right place. I have an MC Jones MM2 SWR/Power Meter and haven't a clue (or a manual) on how it works. It has a pot on the front but that's it. How I differentiate between coming and going is a mystery. I'm not even sure if the n and the out ports are identified properly since the back panel fits both ways. I was hoping to use it with my newly acquired NCX-3. I have a new license and have surrounded myself with old things (like me). Thanks for any help.