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Trimble ThunderBolt E GPS Disciplined Clock User Guide 59
Trimble Standard Interface Protocol A
Report Packet 0x5F-11: EEPROM Segment Status
The receiver sends this packet in response to command packet 0x3F-11. This packet
contains the status of all EEPROM segments:
• A zero in the status bit indicates that the segment contents are valid.
• A one in the status bit indicates that the segment contents were found to be
corrupt and had to be reverted to their factory default values.
• Bits 3-9 are used to generate the minor alarm (bit 10) in packet 0x8F-AC.
Report Packet 0x6D: Satellite Selection List
This packet provides a list of satellites used for position or time-only fixes by the GPS
receiver. The packet also provides the PDOP, HDOP, VDOP and TDOP of that set and
provides the current mode (automatic or manual, 3-D or 2-D, Over-Determined Clock
mode, etc.). This packet has variable length equal to 17+nsvs where "nsvs" is the
number of satellites used in the solution. If an SV is rejected for use by the T-RAIM
algorithm then the SV PRN value will be negative.
The GPS receiver sends this packet in response to packet 0x24 or automatically. The
data format is shown below.
Byte Bit Item Type Value Meaning
0 Subcode UINT8 0x11
1-2 0 Segment status bit field Manufacturing data
1 Unused
2 Unused
3 Receiver configuration
4 Packet I/O control
5 Serial port configuration
6 Timing outputs
7 Accurate position
8 Self-survey configuration
9 Oscillator Disciplining parameters
10-15 Unused
Byte Bit Item Type Value Meaning
0 0:2 fix dimension bit field 1 1D clock fix
32D fix
43D fix
5OD clock fix
3 fix mode bit field 0 Auto
1 Manual
4:7 Number of SVs in fix bit field 0-12 Count
1-4 PDOP Single PDOP
5-8 HDOP Single HDOP