Cobalt Digital COMPASS 9064 Up_Down_Cross Converter - Manual (Page 58)

3
9064 Function Submenu List and Descriptions
3-28 9064 PRODUCT MANUAL 9064-OM (V4.1)
(continued)
• Minimum Latency Frames Control
Minimum Latency Frames Control
When Framesync is enabled, specifies the smallest amount of latency
allowed by the frame sync (latency measurement in output video frames).
The frame sync will not output a frame unless the specified number of
frames are captured in the buffer. The operational latency of the frame
sync is always between the specified minimum latency and
minimum latency plus one frame (not one field).
(Maximum range is 0 to 13.)
Note: Due to card memory limits, the maximum available Minimum
Latency Frames is related to the output video format selected.
For example, with a 1080i59.94 output, the maximum allowed
setting is 5. For a 1080i film (23.98) output, the maximum allowed
setting is 3. Conversely, greater maximum settings are allowed for
SD formats such as 525i59.94, where the practical maximum limit
is 13.
When using this control, be sure to check the Framesync Status
display as follows:
• Latency frames selection within limits.
• Latency frames selection exceeds limits.
• Video Delay Display Displays the current input-to-output video delay (in msec units) as well as
in terms of Frames/fractional frame (in number of lines).
• Framesync Status Display Displays the current framesync status as follows:
• Framesync status OK.
• Framesync Enable set to Off.
• Improper or missing framesync reference.
• Latency frames selection exceeds limits.
Note: See Minimum Latency Frames Control (p. 3-28) for more
information about this message.
• Loss of Input Signal Selection In the event of input video Loss of Signal (LOS), determines action to be
taken as follows:
• Disable Outputs: Disable all outputs.
• Freeze Last Frame: Freeze image to last good frame (last frame
having valid SAV and EAV codes).
• Freeze to Color: Freeze image to a color raster (as selected using
Framesync LOS Freeze Color control).
Note: If LOS is set to Freeze to Last Frame, there will be audio noise
of last audio pacekt also frozen. If card is to handle any audio,
be aware of this if LOC is anticipated in OTA chain.
Table 3-2 9064 Function Submenu List — continued