Vega 30 Router User Manual
Setting Up Router Offset
Output Video Timing - Line Sync and Offset 8.4
Issue1 Revision 1
Page 160
© 2017 SAM
8.4 Setting Up Router Offset
It is important to know the input
relative
signal timing of all signals connected to a router. This
should be checked using a suitable piece of video waveform analyzing equipment.
The Vega 30 Router offers some assistance to set up the router offset values. The procedure
is:
1) Identify the latest-arriving input:
1.
Set all
Lines Offset
and
Pixel Offset
values to zero.
2.
Either:
•
Set all routes to be “1 to 1”,
i.e. ‘Source 1’ to ‘Destination 1’,
‘Source 2’ to ‘Destination 2’,
...
and ‘Source 34 to ‘Destination 34’.
Or
•
Route each input in turn to just one destination.
To record the
Reference Offset
value for each input.
3.
Inspect the recorded values and identify the latest-arriving input and its
Reference
Offset
.
For outputs with a VG10-CSx license option:
4.
Enable the Line Sync feature on each output with a VG10-CSx option.
5.
Route the latest-arriving input to a destination.
2) Set the offset value:
The action required depends on whether the latest-arriving video input Reference Offset
value is positive or negative:
Negative:
If the latest arriving input’s
Reference Offset
value is negative, then:
6.
Add an offset until the
Reference Offset
value is a small positive number (for
example, 10 pixels).
This gives a timing margin of 10 pixels.
Positive:
If the latest arriving input’s
Reference Offset
value is positive, then:
7.
Increase the offset value for the destination by a small positive number (for example,
increase by 10 pixels).
The
Reference Offset
value increases by the same amount.
This gives a timing margin of 10 pixels.
Now:
8.
Change other destinations to the same
Reference Offset
value.
Note:
Smallest
Latest Arriving Input and Reference Offset:
If all input timings are earlier than reference,
then the latest-arriving input’s
Reference
Offset
value will have the smallest positive
value.
If all inputs are co-timed with reference,
then all input timings are the same and the
Reference Offset
value is zero.
If one or more input timings are later than reference,
then the latest-arriving input’s
Reference
Offset
value will have the most negative value.