Manual

Page 10
Advanced Operation
Within post production or video editing, workflow is based around video frames, rather than time in
milliseconds. Within Sync-One2 you can set a frame rate between 1 and 120 frames/sec. Whilst some
frame rates are fractional, for example 29.97, Sync-One2 uses whole frames, which is accurate enough.
Simply pick the closest whole frame rate to the actual one of the systems you are working with.
With a frame rate selected, the Measurement mode displays the readings in milliseconds and in frames,
at the chosen frame rate. However, more importantly, when performing analysis within the Show
Stats menu item the readings for average and span are also given in frames, as is each of the
individual memory buffers.
Using the same readings taken in the Basic Operation example above, with a frame rate set the stats
display will alternate between the reading in milliseconds and frames. So, in this case the frame rate
set is 25 frames/sec, the span is 00.1 frames with the average reading of +0.80 frames.
The value below the memory position indicates if the readings displayed are in milliseconds or frames,
and the frame the rate entered. The display will start to alternate a couple of seconds after a given
memory position is shown. When moving between the memory positions, the readings are shown in
milliseconds but will start to alternate once a given memory position has been shown for a couple of
seconds.
For post-production work having the reading in frames makes it much easier to correct the issue than
just milliseconds. When the frame reading is below 10 frames the resolution is to 1/100
th
of a frame,
above 10 frames resolution is to 1/10
th
of a frame.
Manually offsetting readings
There are situations where being able to enter a known offset can also help understand readings where
equipment delays are known in advance. For example, should a display have a known processing delay
of 45 milliseconds, when the readings are taken the with the signals leaving the computer exactly in
sync, the best obtainable result would be the audio leading the video by 45 milliseconds (+45ms)
because of the delay in the display. To correct for this, you could enter a user offset of -45, then the
processing delay of the screen has been accounted for.
The user offset is input in milliseconds (via the User ms Offset Menu Item) however if a frame
rate is also set the delay calculated in frames will be displayed too.
Measurements taken with an offset applied are tagged with a symbol to indicate the setting is
active.
A +032 M01
S 0002 ms +033
A+0.80 M01
S 00.1 25
F
+0.84