Trimble Outdoors THUNDERBOLT 64057-00-ENG - Manual (Page 24)

2 Setting up and Running the ThunderBolt E
22 Trimble ThunderBolt E GPS Disciplined Clock User Guide
Once the ThunderBolt E has warmed up and acquired satellites it performs a
self-survey: If at least one satellite is currently available, it will output 1 PPS and
10 MHz data to the Trimble GPS Monitor software, see
page 15 . The complete process
can take an hour. Overall performance will improve after several days of continuous
operation.
1 PPS and 10 MHz is not synchronized with GPS until the unit enters
Over-Determined Clock mode.