u-blox ANTARIS 4 - Timemark

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4.7.3 Timemark
This section only applies to LEA-4T modules.
®
swithasubmillisecondresolutionusingtheexternal
ANTARIS
4GPSReceivercanbeusedfortimemeasurement
interrupt(EXTINT0).TheTimemarkfunctioncanbeenabledwithUBX– CFG–TM(forfirmwareversion<5.00)
orUBX–CFG–TM2(forfirmwareversion≥5.00).
The results are transmitted via
 serial port with the UBX – TIM – TM/TM2 messages including time of the last
Timemarktimesource,validity,numberofmarks,deltatimeandaquantizationerror.
UTC 8:30:01.234UTC 8:30:00.000
UTC 8:30:02.234
EXTINT0
(neg Edge)
Time of last mark
Delta Time
Time Source
Nr. of marks
wno:117014.000
1'234 ms
UTC
n
wno:117014.000
1'000 ms
UTC
n+1
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Figure 90: Timemark example
GPSModules-SystemIntegrationManual(SIM)(incl.ReferenceDesign) ReceiverDescription
GPS.G4-MS4-05007-A1
  Page 114