ProfiShark Manager — Timing
ProfiShark 1G+ / 10G+
The Timing tab displays settings and information related to the advanced timestamping features.
Control | |
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Timestamp initialization | Sets the source for timestamping at startup: GPS / RTC / System time. If “Do not initialize” is selected, it will start from Epoch 0 (1970). |
Wait for sync | If enabled, traffic capture is only allowed after timestamp synchronization has been completed. |
PPS port output | If enabled, the PPS port will be set to output mode, sending out a PPS signal if the GPS is synchronized. |
Force PPS generation | Forces the generation of a PPS signal from the internal RTC (real-time clock). Note: Only active if PPS port output is also enabled. |
Set time from SNTP/GPS | Sets the source for timestamping to either GPS or an online time service (SNTP). |
PPS compensation | The PPS compensation slider tells the PPS to compensate for additional (external) latency. For instance, 1 meter of cable adds 3 ns of latency, in which case the slider should be set to -3 ns (-15 ns for 5 meters, -30 ns for 10 meters, etc.). |
Timestamp on Port A/B | Capture: Timestamps are set to the packets at the moment they are captured within the device. Ingress: Timestamps are adjusted to account for latency to simulate timestamping at port ingress. Egress: Timestamps are adjusted to account for latency to simulate timestamping at port egress. Example: Set one port to egress on a first ProfiShark and one to ingress on a second ProfiShark to measure the latency between both ports. |
Status | |
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GPS module detected | If green, the GPS antenna has been detected by the ProfiShark. |
GPS fix | If green, the GPS connection is stable. If yellow, the GPS connection is close to being stable. |
GPS PPS | If green, the GPS link is stable enough for the PPS chip to start the synchronization. |
External PPS | If green, an external PPS is detected, bypassing the internal PPS. If red, no external PPS has been detected. |
Timestamp initialized | Indicates the method by which the time data has been obtained: GPS, SNTP, System clock, or RTC. |
Timestamp synced | Indicates that the internal timestamping is synchronized with the UTC time. |
Satellites status | Indicates the number of GPS and GLONASS satellites found in range, and the number of satellites used for timestamping. |
Deviation from PPS | Indicates the instant deviation of the GPS synchronization from the internal PPS. |
Graph | The graph section displays the GPS synchronization status and its deviation from the internal PPS over time. |