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A Trimble Standard Interface Protocol
66 Trimble ThunderBolt E GPS Disciplined Clock User Guide
Command Packet 0x8E-4C: Write Configuration Segment to NVS
This command packet causes the current configuration settings for the specified user
segment (or all segments) to be written to NVS. The segment ID is contained in a data
byte.
Command Packet 0x8E-4E: Set PPS output option
This command packet sets the PPS driver switch to one of the values listed below. The
current driver switch value can be requested by sending the packet with no data bytes
except the subcode byte.
Driver switch values 3 and 4 only make sense in Over-Determined Timing mode. In any
position fix mode the effective choices are always on or during fixes which you get if
you set the driver switch to 3 or 4.
ThunderBolt E can also be configured to generate an Even Second pulse in place of the
PPS pulse by setting the value as shown in the table below.
Byte Item Type Value Meaning
0 Subcode UINT8 0x4C
1 Segment ID UINT8 3 GPS Receiver config
4 Packet I/O control
5 Serial Port config
6 Timing Output config
7 Accurate Position
8 Self-Survey config
9 Disciplining config
0xFF All segments
Byte Item Type Value Meaning
0 Subcode UINT8 0x4E
1 PPS driver switch UINT8 0x02 PPS is always on.
PPS is generated every second.
0x03 PPS is output when at least one
satellite is tracking.
PPS is generated every second
0x04 PPS is output when at least three
satellites are tracking.
PPS is generated every second
0x82 PPS is always on.
PPS is generated every even second.
0x83 PPS is output when at least one
satellite is tracking.
PPS is generated every even second.
0x84 PPS is output when at least three
satellites are tracking.
PPS is generated every even second.