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→Time synchronization for hardware packet timestamping
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The synchronization to the system time happens roughly every 5 seconds. When the interface clock deviates more than 500ms from the system clock (should only happen at startup or when there is a big jump in the system time e.g. when changing the time synchronization method) the interface time is immediately reset to the system time. If there is a smaller deviation from the system clock the frequency of the interface clock is gradually adjusted to make the clock anneal to the system time so to avoid any discontinuous jumps of the packet timestamps. | The synchronization to the system time happens roughly every 5 seconds. When the interface clock deviates more than 500ms from the system clock (should only happen at startup or when there is a big jump in the system time e.g. when changing the time synchronization method) the interface time is immediately reset to the system time. If there is a smaller deviation from the system clock the frequency of the interface clock is gradually adjusted to make the clock anneal to the system time so to avoid any discontinuous jumps of the packet timestamps. | ||
When "GNSS/GPS" time synchronization has been configured and the interface is receiving a valid GNSS/GPS time signal the interface clock is directly disciplined to the GNSS/GPS time signal and the system clock is synchronized to the GNSS/GPS time. | When "GNSS/GPS" time synchronization has been configured and the interface is receiving a valid GNSS/GPS time signal the interface clock is directly disciplined to the GNSS/GPS time signal and the system clock is synchronized to the GNSS/GPS time. Information of the synchronistation status is display on the System Info page. Interfaces with hardware packet timestamping but without a GNSS/GPS connection will continue to be synchronized to the system time (which is now running much closer to the global GNSS/GPS time). | ||
===External timestamps=== | ===External timestamps=== | ||