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7847FSEDA Series
Frame Synchronizer and Distribution Amplifier
Page - 28
Revision 0.1
5.2.3. Reference
The 7847FSEDA series supports fully independent timing on each video processing path. Each video
processing path can be configured to either lock to the input video timing, or the external reference
signal timing. The
Reference
tab within the video configuration provides the controls and status related
to video path specific reference controls.
illustrates the layout of the controls in the
VistaLINK® PRO configuration view.
Figure 5-10: Video Path Configuration - Card Reference Tab
Reference Select
: This control selects the source of timing for the video processing path. When set to
External Genlock,
the video path will lock to the reference signal when it is present and valid for the
detected input video standard. If the reference signal is not present, the module will lock to an internal
free-running clock. When set to
Video
, the video path will generate its timing from the detected input
video signal.
Reference Monitor
Reference Status
The
Reference Status
reports the current source of reference for the video path. If the video path is
currently locked to a reference signal, it will report the source of the reference signal as
Card ref
,
Frame ref 1
, or
Frame ref 2
. If the card is actively locked to input video, it will report
Video
. If the
video path is currently free-running, it will report
None.
Reference Type
The
Reference Type
reports the type of reference for the video path. If the video path is currently
locked to a reference signal, it will report the type of the reference signal as either
Bi-phase
or
Tri-
level.
If the card is actively locked to input video, it will report
Video
. If the video path is currently
free-running, it will report
None.
Genlock Standard
External Genlock Standard
reports the video standard of the detected reference signal. If a signal
has been detected, but the module determine the video standard, it will report
Unknown
. If no
reference signal is present on the selected reference input, it will report
Not present
.
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