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Trimble ThunderBolt E GPS Disciplined Clock User Guide 43
Trimble Standard Interface Protocol A
Command Packet 0x1E: Initiate Cold, Warm, or Factory Reset
This packet commands receiver to perform either a cold reset, warm reset or a factory
reset. A cold reset will clear the GPS data (almanac, ephemeris, etc.) stored in RAM and
is equivalent to a power cycle. A factory reset will additionally restore the factory
defaults of all configuration parameters stored in flash memory. A warm reset clears
ephemeris and oscillator uncertainty but retains the last position, time and almanac.
This packet contains one data byte. The data format is shown below.
Note – The factory reset command will delete the stored position and cause a self-survey to
restart.
Command Packet 0x1F: Request Software Version
This packet requests information about the version of software in ThunderBolt E. This
packet contains no data. The requested data is returned in packet 0x45.
Command Packet 0x24: Request GPS Satellite Selection
This packet requests a list of satellites used for the current position/time fix. This
packet contains no data. The requested data is returned in packet 0x6D.
Command Packet 0x25: Initiate Hot Reset
This packet commands the GPS receiver to perform a hot reset. This is not equivalent
to cycling the power; RAM is not cleared. This packet contains no data.
Command Packet 0x26: Request Receiver Health
This packet requests receiver health status. This packet contain no data. The
requested data is returned in packet 0x46 and packet 0x4B.
Command Packet 0x27: Request Signal Levels
This packet requests signal levels for all satellites currently being tracked. This packet
contain no data. The requested data is returned in packet 0x47.
Command Packet 0x29: Request Almanac Health
This packet requests Almanac health data. This packet contain no data. The requested
data is returned in packet 0x49.
Byte Item Type Value Meaning
0 Reset UINT8 0x4B
0x0E
0x46
Cold reset
Warm reset
Factory reset