Crystal Vision
References and Output Timing
M-VIVID User Manual R1.3
26
18 August 2022
PTP Statistics
PTP statistics
Network delay:
Calculated delay between MARBLE-V1 card and the master PTP clock.
Expected to be small if network switch is PTP-aware, otherwise will reflect number of
switches between MARBLE-V1 card and the master PTP source
Delay variation:
Indicates system noise and how accurately MARBLE-V1 can lock. For
example, to lock within 500ns, the delay variation should be less than 500ns
Reference offset:
Offset between MARBLE-V1 card and master PTP clock. Expected to
be less than 500ns
Sync Period:
How often the PTP sync packets are seen. Indicates whether the master
PTP clock is configured correctly, e.g. 8 packets a second, and whether there are any
packets missing which could indicate a network issue
7.2 Output timing
The output timing controls adjust the offset delay of all outputs relative to the chosen
reference source. All outputs are locked to the same reference source, it is not possible to
offset each output individually. However, the offset can be set per video format, allowing for
example, different output timing for HD and SD signals. If the input to chosen reference timing
is close enough to fall below the card's minimum processing delay, a one frame delay will be
applied. The output timing controls are sub-frame time based (ms and us). Status is provided
for the equivalent lines and pixels delay.
Output timing
Output Timing
Enable:
Select to enable the output timing controls. Minimum possible delay applied
when deselected