Ross Synergy 2 SD, Installation Manual

Page: 287 / 414

Synergy Series Installation Guide (v18) Additional Installation Setups • 9–57
must be delayed by
4
/
16
(or ¼) of a line. If the Deserializer Module can only delay a video signal from
zero to one line, adding this ¼ line delay to the reference reduces the auto-timing window by ¼ line.
This occurs because MLE 1 does not see this delay, and a signal has to auto-time to both MLE 1 (at
the start of the switcher) and a timed Aux Bus (at the end of the switcher) — simultaneously.
At this point, please note that Synergy’s quoted auto-timing specification of
±
¼ line is a very
simplified quantity. When the user adjusts the reference delay, they are also increasing the delay
through the switcher. Therefore, the auto-timing capability ranges from zero to ¾ line — relative to
whatever delay the user adds. In the middle, you get
±
3
/
8
line, but Synergy quotes
±
¼ line — in order
to be conservative.
When you adjust the reference delay, you will find that it can actually be adjusted to about 1.5 lines.
This is the extreme limit of the hardware’s capability and in theory, this capability could time an input
that is much later than the supplied reference.
To conclude the discussion, note that the goal of Synergy’s auto-timing algorithm is to lock an input’s
horizontal edge with the edge of reference. The algorithm will always succeed in this task, assuming
that valid video is supplied. This is true — even if the incoming video is not locked to the reference
and has a significant field-to-field drift! Note also that a vertical phase detector circuit will detect a
vertical edge mismatch between the reference and the auto-timed video, and cause the non-sync LED
to light on the control panel when this “non-sync” source is selected.
Non-Sync LEDs
Each Synergy switcher auto-times any source that is within
±
¼ line of the reference input. Typically,
no special procedures are required in order to time your inputs. If you wish to adjust the switcher’s
reference delay, in order to match the
entire switcher to incoming sources, refer to section “ Reference
Delay Adjustment ” on page 9–58. If an input is outside of the range (
±
¼ line), the following rules
apply:
• The input will continue to be horizontally phased, but it will H-phase on a subsequent
line.
• Visually, the input will be horizontally locked, but it will appear “shifted” down the
screen.
• The N/S (Non-Sync) LED will light, indicating that source on that specific bus is
non-synchronous, as shown in the figure below.
Non-Sync Indication
The N/S LED serves as a warning only, indicating that the input’s timing should be
fixed at the source . In Chapter 4 of the Synergy Series Operation Guide , refer to the
“ Non-sync Indicators ” section for additional information.
In this condition, with a non-sync LED lit, the source is still usable. You can perform cuts, dissolves,
and other effects — however, remember that the non-synchronous source will be shifted vertically.
SHIFT BLACK
PGM
PST
CAM
1
CAM
2
CAM
3
CAM
4
CAM
1
COLOR
BKGD 1
COLOR
BKGD 2
SHIFT
MLE
1
MLE
1
MLE
2
MLE
2
MLE
3
MLE
3
BLACK
CAM
1
CAM
2
CAM
3
CAM
4
CAM
1
COLOR
BKGD 1
COLOR
BKGD 2
ON
ON
N/S
N/S
Non-Sync
LED