Advanced Timestamping - ProfiTap PROFISHARK 1G User Manual

If «Decode timestamps for ProfiShark 1G» is enabled,
Wireshark assumes that every packet contains the ProfiShark
timestamp.
If timestamps aren't displayed in nanosecond resolution in
Wireshark, select 'Nanoseconds' in 'View -> Time Display
Format'.
Advanced Timestamping (ProfiShark 1G+ only)
The Timing tab contains information and settings related to
timestamping. It only appears on the ProfiShark Manager if a
ProfiShark 1G+ is connected.
The ProfiShark 1G+ offers multiple advanced timestamping
features. The GPS chip can retrieve the UTC time, and
synchronize it with the internal PPS, with a typical precision of
±16 ns. The ProfiShark 1G+ can also retrieve the time via SNTP,
or use the internal RTC (real-time clock), and synchronize
it via an external PPS signal. A PPS output is possible, for
synchronization with another ProfiShark device, or with any
other device accepting PPS input.
These systems can be combined in different ways,
providing multiple possible options for accurate and precise
timestamping of packets.
Note that the GPS antenna should be set up outside, or near a
window, for the best results. The GPS can take about a minute
to synchronize the UTC time with the internal PPS. The stability
of synchronicity increases over time, and may take 10 to 15
minutes to reach its peak.
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