GEN7iB
446
TROUBLE-SHOOTING
TROUBLE-SHOOTING
D
Thestateremainsat“Coarse”
Category Description
Cause A network switch is causing jitter on the PTP timestamps in the
network.
Solution Increase the PTP Accuracy, see „Checking the Perception setup“ on
page 421.
Recording When starting a recording the mainframes are typically not syn-
chronizedwithinthespeciedaccuracy.Thesamplesatthestartof
the recording are expected to be synchronous within 10 times the
speciedaccuracy,butmaydriftapartastherecordingproceeds
depending on the cause of the problem.
Feedback Typically,anoticationappearsandtherecordingcontainsamarker
to point out the problem.
Use accurate master is set, status is orange
Category Description
Cause The mainframe is synchronized to a PTP master that has a clock
class worse than 7.
Solution 1 GPS antenna is not found, the mainframe has become PTP master.
Treat this the same as “No signal”.
Solution 2 Waitforapproximatelyveminutes,theGPSantennamaystillbe
evaluating its clock class.
Recording
(different
non- accurate
masters)
Each mainframe operates synchronized to its master, data in the
recording maybe shifted.
Recording
(single
non-accurate
master)
The data of all mainframes are typically synchronized to the PTP
master; however, some systems may apply additional sanity checks
and adjust sample times when these checks fail.
This setup requires any additional network peripherals to be PTP aware.
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