Trimble Outdoors THUNDERBOLT 64057-00-ENG - Manual (Page 81)

Trimble ThunderBolt E GPS Disciplined Clock User Guide 79
Trimble Standard Interface Protocol A
Report Packet 0x8F-AB
Report Packet 0x8F-AC: Supplemental Timing Packet
This packet provides supplemental timing information once per second. Information
regarding position, unit status and health, and the operational state of the unit is
provided. This packet can be requested or enabled for automatic broadcast once per
second. When enabled, this packet is transmitted once per second shortly after packet
0x8F-AB.
The position sent in packet 0x8F-AC depends on the Receiver Operating Mode and on
self-survey activity. When a self-survey is in progress, the position sent is the running
average of all of the position fixes collected so far. When the self-survey ends or
whenever the receiver is using a time-only operating mode, then the position sent is
Time of Day The time of day is sent in hours-minutes-seconds format and varies from
00:00:00 to 23:59:59, except when time is in UTC and a leap second insertion
occurs. In this case the time will transition from 23:59:59 to 23:59:59 to
00:00:00. Use command packet 8E-A2 to select either the GPS or UTC time
scale.
Date The date is sent in day-month-year format. Use command packet 8E A2 to
select either the GPS or UTC time scale.
Byte Bit Item Type Value Description
0 Subcode UINT8 0xAB
1-4 Time of week UINT32 GPS seconds of week
5-6 Week Number UINT16 GPS Week Number
7-8 UTC Offset SINT16 UTC Offset (seconds)
9 0 Timing Flag bit field 0
1
GPS time
UTC time
1 0
1
GPS PPS
UTC PPS
2 0
1
time is set
time is not set
3 0
1
have UTC info
no UTC info
4 0
1
time from GPS
time from user
10 Seconds UINT8 0-59 Seconds
11 Minutes UINT8 0-59 Minutes
12 Hours UINT8 0-23 Hours
13 Day of Month UINT8 1-31 Day of Month
14 Month UINT8 1-12 Month of Year
15-16 Year UINT16 Four digits of Year
Data field Description