Why won’t the GPS100 lock on and produce a position fix?

The GPS100 may not lock on and provide a fix for several reasons. First, the GPS100 needs a clear view of the entire sky, so you need to make sure the GPS100 is not obstructed by a deck house, TV antenna, or any other object that blocks the GPS100 from having a 360 degree view of the sky. Secondly, the GPS signal can be swamped out by other strong Radio Frequency (RF) transmitters such as radars or radio antennas. Try moving the GPS100 away from these RF transmitters if you suspect that the GPS100 is not locking on due to interference.