Monday update...I followed the procedures and the base/rover screen was exactly as shown in manual. I had all systems go, then I walked about 100 feet and watching the base/rover screen all the while and then the screen changed from "stop button" showing to "start button" shows gray and the screen showed communication was "ok" for LS but no "ok" for base and the coordinates no longer showed in display screen....but I could still collect and stake points and about anything I wanted to do. The Greek "E" button in Collection screen even shows I have base and rover positions. When I was done with about 3 hours of surveying...I went to base/rover button and "start buttton" was still grayed, no "stop button" available, so I just pressed done. I would like the stop base button to show, so that I can shut down properly, and of course to have communication and display coordinates show as well in the base/rover screen.....but it did still survey points anyway.....Phil