I am running my 252 with my Trimble FMD. I have a RTK subscription and have had troubles with my signals. I have been in a flat field, 3 miles from the tower and will get a degraded signal message. This will kick the autosteer to manual mode. I have tried to switch to WAAS, but FMD says not available. The next day it worked great all day long. I quit at 7pm and came back at 10pm and could not obtain signal. My last field, I had switched to a different tower and the closer I got to a treeline, the more frequent the signal would drop. I was within 5 miles of that tower. my RTK rep said if I was within 7 miles of any tower I should have signal, even with the trees. Any ideas?