Trimble Outdoors THUNDERBOLT 64057-00-ENG User Manual
Page 76
A Trimble Standard Interface Protocol
74 Trimble ThunderBolt E GPS Disciplined Clock User Guide
Command Packet 8E-A9 Data Format
Command Packet 0x8E-AB: Request Primary Timing Packet
Use command packet 0x8E-AB to request the Primary Timing packet 0x8F-AB. By
default, the receiver automatically sends packet 0x8F-AB once per second so it is not
necessary to request it. To receive 0x8F-AB information by request only, use packet
0x8E-A5 to disable the automatic output.
The Request Type item determines how the receiver will reply to this command:
Command Packet 0x8E-AB Data Format
Byte
Item
Type
Value
Description
0
Subcode
UINT8
0xA9
1
Self-Survey Enable UINT8
0
1
Disabled
Enabled
2
Position Save Flag
UINT8
0
1
Don't save position
Save self-surveyed position at the end of
the survey
3-6
Self-Survey Length UINT32 see above Number of fixes
7-10
Reserved
UINT32 0
0
Type
Description
0
The most current primary timing values will be sent in packet 0x8F-AB immediately.
1
The response is not sent immediately. Instead packet 0x8F-AB is sent after the next
PPS output. This is the same time that the packet would be automatically sent if
enabled.
2
Same as type 1 except that both 0x8F-AB and 0x8F-AC are sent after the next PPS
output.
Byte
Item
Type
Value
Meaning
0
Subcode
UINT8
0xAB
1
Request type
UINT8
0
Send 0x8F-AB immediately
1
Send 0x8F-AB on-time next second
2
Send 0x8F-AB and 0x8F-AC on-time next
second