Cobalt Digital Inc 3G Fusion 9931-EMDE Product Manual page 73

Operating Instructions
Table 3-2 9931-EMDE Function Menu List — continued
• Pattern Select
• Output Video Reference Offset Controls
• Minimum Latency Frames Control
Minimum Latency Frames Control
9931-EMDE-OM (V1.17)
9931-EMDE Function Menu List and Descriptions
(continued)
Provides a choice of standard technical patterns (shown to the left) when
Test Pattern is invoked.
With framesync enabled, provides the following controls for offsetting the
output video from the reference:
• Vertical (Lines) – sets vertical delay (in number of lines of output
video) between the output video and the frame sync reference.
(Positive values provide delay; negative values provide advance)
(Range is -1124 thru 1124 lines; null = 0 lines.)
• Horizontal (µs) – sets horizontal delay (in µs of output video) between
the output video and the frame sync reference. (Positive values provide
delay; negative values provide advance)
(Range is -64 thru 64 µsec; null = 0.000 µsec.)
Note: Offset advance is accomplished by hold-off of the
reference-directed release of the frame, thereby effectively
advancing the program video relative to the reference.
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).
Note: Due to card memory limits, the maximum available Minimum
Latency Frames is related to the output video format selected.
For example, with a 525i59.94 output, 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.
9931-EMDE PRODUCT MANUAL
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