GRASS VALLEY KayakDD-1, Планирование и руководство по установке

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KayakDD-1 Digital Production Switcher
6.7.4 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 by a specified amount (± B µs). Inputs must be within this timing range
to be properly timed at the output. A timing diagram for illustrating the input autotiming
window and various switcher delay values is provided in figure below.
Figure 16 Timing and Delay
NOTE!
For both 525 and 625 switcher operation, the approximate maximum switcher delay is
one line of video. Exception is the use of a Digital Picture Manipulators. The signal
going through the Digital Picture Manipulators is delayed by one frame.
x
For inputs entering the switcher in zero time with the reference, the total delay
through the switcher is expressed as the Nominal Switcher Delay
(
A µs).
x
Inputs that reach the switcher at the latest point in the autotiming window
(+
B µs) will have a total delay that equals the length of switcher processing. This
value is expressed as the Minimum Switcher Delay ( C µs).
x
Inputs that reach the switcher at the earliest point in the autotiming window will
have a total delay equal to the Nominal Switcher Delay (
A µs) plus the autotiming
value (– B µs). This value is expressed by the Maximum Switcher Delay value ( D
µs).
Delay values for a KayakDD system are given in table below
System Video Delay Values
Typical Switcher Delay A 36 µs
Auto-timing Range
B
53 µs
Minimum Switcher Delay C 10 µs
Maximum Switcher Delay D 63 µs
Planning and Installation Manual 53