Ross OpenGear HDC-8223A, User Manual

Page: 52 / 80

5–12 • DashBoard Menus HDC-8223A(-S) User Manual (Iss. 03)
Framesync Tab
The Framesync tab is only available when using the HDC-8223A-S. When displayed, this tab
provides video frame sync/delay offset control and output control/loss of program failover
selection controls. The frame sync provides H and V timing adjustments that affect both the
CVBS and the down-converted SDI outputs simultaneously. Color framing of the analog
composite output is not supported.
Table 5.10 summarizes the options available in the
Framesync tab.
Note
— Audio timing offset from video is performed using the delay controls on the Output
Audio Routing tab. Refer to the section “ Output Audio Routing/Controls Tab ” on page 5-17
for details.
Table 5.10 Framesync Tab Items
Tab Title Item Parameters Description
Framesync Enable
Framesync Bypassed
Select this option for minimal delay and
no frame sync processing of the output
Framesync Enabled
Select this option to route the
down-converted video through the frame
synchronizer
Lock Mode
Reference # Lock to Input
Output video is locked to external
reference received on the frame reference
bus. External reference signal Reference 1
is distributed to the card and other cards
via the
REF 1 BNC on the openGear
frame.
If a valid reference is not received, the
Card State field displays the message
“
Reference Invalid
”, indicating that
an invalid frame sync reference error is
occurring.
Lock to Input else Free Run
Uses the program video input video signal
as the reference standard.
If this is selected for framesync, any
timing instability on the input video will
results in corresponding instability on the
output video.
Free Run
Output video is locked to the card’s
internal clock. Output video is not locked
to external reference.
Initial Startup Format #
Selects a synthesized frame sync
format/rate to be invoked in the time
preceding stable lock to external
reference.
Set this control to that of the intended
external reference to help ensure
smoothest frame sync locking. This
control also sets the card test pattern
format where the card’s initial output from
power-up is the internal pattern instead of
program video.