Grass Valley Karrera Video Production Center Installation v.4.1 User Manual
Page 69
KARRERA — Installation & Service Manual
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Karrera System Video Timing and Delay
Figure 38. Switcher Timing Diagram
•
For inputs entering the switcher in zero time with the reference, the
total delay through the switcher is the Nominal Switcher Delay (A μs).
•
Inputs that reach the switcher at the latest point in the autotiming
window (+B μs) will have a total delay that equals the time required for
switcher processing. This value is the Minimum Switcher Delay (C μs).
•
Inputs that reach the switcher at the earliest point in the autotiming
window (-B μs) will have a total delay equal to the Nominal Switcher
Delay (A μs) plus the autotiming window range. This value is the
Maximum Switcher Delay value (D μs).
On Karrera systems the autotiming window varies depending on the oper-
ating mode. The Timing Analyzer in the Video Settings Menu displays this
autotiming information (
). Also see
for more detailed information.
Note
The maximum switcher delay is approximately one line of video.
Nominal Output
Timing
Serial Input
Autotiming
Window
+/- B µs
Nominal Reference
Timing
8096_03_05_
r1
Nominal Switcher Delay
A µs
Maximum Switcher Delay
D µs
Minimum Switcher Delay
C µs
- B µs
+ B µs
0 µs