I've had this refurb SP4 for about 2-3 years with very few problems (except for the Repeater being down a bunch of times). All of the sudden, when I am in the car, and I have SAT and TER signal, it is in a constant acquiring signal mode. 5 seconds or so of audio- 5 seconds of acquiring signal. I have tried this radio in my home soloists and work soloist. As long as I don't have a SAT signal, I have no issues. The moment I get both signals, acquiring signals comes back. Tech Support on the phone isn't too helpful usually -- I get better info from these boards . The radio is no longer under warranty. Any ideas?