Additionally to the high-speed marker, each channel provides also a second marker
called sync marker. This sync marker can only be set in sync clock granularity which is
equal to the sample vector granularity.
The sync marker is an output of the pattern generation. For details, refer to section
1.5.1. Delay adjustments don not change the delay of the sync marker.
The following drawing shows an example. The dots represent the marked sync clock
vectors.