4
1.3.2 Hot Switching
Some applications or studio setups may require the input 4:2:2 signal to the DVP-
101i be switched between two or more synchronous sources. Since these
synchronous sources are generally not in phase with respect to each other,
unpleasant visual effects may occur when switching from source A to a
different time position in source B. Also, some “break before make” switchers will
further deteriorate the 4:2:2 signal by producing a hit on the video signal.
Figure 1.5 illustrates a typical hot switch setup. For a smooth transfer to occur
when switching between two sources, set the FRZE-MODE to ERR (error on input
signal). Immediately after a switch is performed on the routing switcher, DVP-101i
will detect an input error thereby performing a freeze. The DVP-101i automatically
switches to the last errorless field or black. Once the transfer between the two
sources is complete and after two full errorless input frames, the freeze is
removed and normal mode is resumed.
Note: Operation is guaranteed if the time delay between the two sources is less
than 10 video lines.
Figure 1.5
Typical Hot Switch Installation
Routing
switcher
Reference
DVP-101i
Source A
Source B
Содержание DVP-101i
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