9921-FS-OM (V1.18)
9921-FS PRODUCT MANUAL
3-21
Operating Instructions
9921-FS Function Menu List and Descriptions
Framesync
Provides video frame sync/delay control and output
control/loss of program video failover selection controls.
• Framesync Enable/Select
Selects Frame Sync functions from the choices shown to the left and
described below.
• Free Run: Output video is locked to the card’s internal clock. Output
video is not locked to external reference.
• Lock to Reference: Output video is locked to external reference
received on the frame reference bus using the rules selected. (External
reference signals Reference 1 and Reference 2 are distributed to the
card and other cards via buses on the frame.)
Note: If valid reference is not received, the
indication appears in the Card Info
status portion of DashBoard™, indicating invalid frame sync
reference error.
• Lock to Input: Uses the program video input video signal as the
reference standard.
Note: If Lock to Input is used for framesync, any timing instability on
the input video will result in corresponding instability on the
output video.
• Initial Startup Format Select
Selects a synthesized frame sync format/rate to be invoked (from the
choices shown to the left) 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 at power-up is the internal pattern
instead of program video.
• Program Video Output Mode Select
Provides a convenient location to select between card program video output
and other technical outputs from the choices shown to the left and described
below.
• Input Video – card outputs input program video (or loss of signal
choices described below).
• Flat Field (Black) – card outputs black flat field.
• Freeze – card outputs last frame having valid SAV and EAV codes.
• Test Pattern – card outputs standard technical test pattern (pattern is
selected using the Pattern drop-down described below).
• Loss of Input Signal Selection
In the event of program input video Loss of Signal (LOS), determines action
to be taken as follows:
• Disable Outputs: Disable program video SDI outputs.
• Flat Field (Black) – go to black flat field on program video output.
• Freeze – go to last frame having valid SAV and EAV codes on program
video output.
• Test Pattern – go to standard technical test pattern on program video
output (pattern is selected using the Pattern drop-down described
below).
Table 3-2
9921-FS Function Menu List — continued
