Wendell, please correct me if I am committing a faux pas by posting an ebay link, but this was the easiest way I know to post pics. I'm not the seller, but personally know him and will vouch for both him and the unit he is selling. I didn't see where anyone else has linked an ad, so edit accordingly.
I've used this system many times and while it hasn't worked perfectly every time, the problems were all from the user side of the keyboard, as he and I were deep in the learning curve. Once we learned enough to be consistent, it has performed flawlessly. He has maintained it and upgraded memory as the need arose.
My only other experience in RTK were Hyperlites, and this blows them out of the water as far as range. I will say most of the work done was on flat land, so we got much more range than would be typical in hilly regions that would affect radio signal.
Good system. I have one just a little older then that.
He needs to go into PCCDU and post a picture of the activated options. Best way to prove what teh receiver has ans doesn't have.