Timing Tab - ProfiTap ProfiShark 100M User Manual

3.1.7. Timing Tab

ProfiShark 1G+ / 10G+
The Timing tab displays settings and information related to the advanced timestamping features.
Timestamp initialization
Wait for sync
PPS port output
Force PPS generation
Set time from
SNTP/GPS
PPS compensation
Timestamp on Port A/B
Sets the source for timestamping at startup: GPS / RTC / System time. If "Do not
initialize" is selected, it will start from Epoch 0 (1970).
If enabled, traffic capture is only allowed after timestamp synchronization has been
completed.
If enabled, the PPS port will be set to output mode, sending out a PPS signal if the
GPS is synchronized.
Forces the generation of a PPS signal from the internal RTC (real-time clock).
Note: Only active if PPS port output is also enabled.
Sets the source for timestamping to either GPS or an online time service (SNTP).
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.).
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.
Control
38