GRASS VALLEY Kayenne XL Package, Installation And Service Manual

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88 Kayenne XL Package — Installation and Service Manual
Section 4 — System Cabling
Video Timing and Delay
The total delay of a video input to the switcher output can vary according
to the relationship of the input to the switcher reference. The switcher will
automatically autotime inputs that fall within an autotiming window.
Inputs must be within this range to be properly timed at the output. The
calculation of the actual video delay of a specific input is the Nominal
Switcher Delay minus the input time location within the autotiming
window (the time location value can be zero, positive, or negative). A
timing diagram of the input autotiming window and various switcher
delay values is provided in
Figure 60 .
Figure 60. 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).
Note The maximum switcher delay is approximately one line of video.
On Kayak HD/Kayenne XL systems the autotiming window varies
depending on the operating mode. The Timing Analyzer in the Video Set-
tings Menu displays this autotiming information (
Figure 61 on page 90 ).
Also see Table 15 on page 89 for more detailed information.
Nomi n al O u tp u t
Timi n g
S e r ial I n p u t
A u totimi n g
Wi n dow
+/- B µ s
Nomi n al Refe r e n ce
Timi n g
8096_03_05_
r
1
Nomi n al S witche r Delay
A µ s
Maxim u m S witche r Delay
D µ s
Mi n im u m S witche r Delay
C µ s
- B µ s + B µ s 0 µ s