OmniTek Ultra XR, User Manual

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Ultra XR User Guide 2–53 XR-56-201 5
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Timing
Timing Tile
Timing Description
The Timing tile shows the relative timing
of each input against a reference source.
This allows the measurement against
a studio analogue reference as well
as the measurement of inter-link
timing between each of the physical
connections.
This display consists one or more ‘meters’, one for each input that is contributing to the video that is
currently being analysed.
Each meter shows the amount by which the input (named below the meter) is advanced or delayed
relative to the Reference signal named at the top of the display. For example, the meters shown in
the above example show the timing of a set of four SDI Inputs relative to the first of those Inputs. The
input to be used as the reference is selected using the Button Bar.
A diamond-shaped marker on each meter shows the measured timing. This timing is also interpreted
in terms both of Lines & Pixels and of microseconds, with the figures given immediately below the
meter. See the important note below.
The measurements are made in terms of the time between the Start of Frame on the Input under
test and the next Start of Frame to occur on the selected Reference signal. These two events can
be no more than one frame apart and, as the actual ordering of the frames isn’t monitored, the
measurement is interpreted as the Input under test either being up to 0.5 frames in advance of the
selected Reference or being up to 0.5 frames behind to the selected Reference i.e. any timing that is
over 0.5 frames in advance rolls round to become less than 0.5 frames behind (and vice versa).
The meters are marked out in tenths of a frame, going between advanced by 0.5 frames on the left
and delayed by 0.5 frames on the right, with ‘0’ in the middle. The position of the marker can therefore
be interpreted as follows:
Marker at ‘0’: the Input under test is exactly synchronised with the Reference signal
Marker left of centre: the Input under test is ahead of the Reference signal
Marker right of centre: the Input under test is behind the Reference signal
These interpretations should be reinforced by the word ‘advanced’ or ‘delayed’ shown below the
meter after the number of microseconds.