Extron Electronics Matrix 6400 Series - Manual (Page 22)

Using the FPC 1000 Front Panel Controller • Chapter 3
Matrix 3200/6400 Series Switchers • FPC 1000 • User’s Manual • Extron 3-9
Triple-Action™ switching with adjustable delay (Wideband models)
For seamless switching from one RGB input to another, an adjustable delay is
available for each output. This allows the 3200/6400 systems to accommodate
the switching characteristics of any display device. Those systems with RGBS or
RGBHV video use Extron’s Triple-Action Switching for smooth transitions when
switching from the image of one input source to another. This is done by
switching the sync and RGB signals separately in a prescribed sequence.
Because some projectors may require different delay times, Extron has an
adjustable time delay for each output device.
Using an example of a large screen projector and a switcher (top of Figure 3-8),
switching from input A to input B normally works as follows:
1. Input A is being displayed by the output device and a request is received to
switch to input B (from a panel button or a program command).
2. Both RGB and sync are switched from input A to input B as a single action.
The displayed image is scrambled as input A turns off and input B turns on.
This is because the picture is being displayed before the sync locks in.
Although it may be brief, this unstable display can be annoying.
3. Input B is now displaying normally to the output device.
Figure 3-8. Normal Single Action Switching (top) as Compared to Triple-Action Switching (bottom)
Refer to the bottom half of Figure 3-8 to switch from input A to input B with Triple-
Action switching.
1. Input A is being displayed by the output device and a request is received
(from a panel button or a program command).
2. The RGB signals for input A are switched off, causing the display screen to
become blank. The sync from input A is still on.
3. The sync is switched from A to input B (but not the RGB signals). The screen
is still blank, as the new sync stabilizes.
4. The RGB signals from input B are switched to the projector. The image is
stable because the projector has already locked onto the new sync.
Although this description may seem like a long delay, it is only from 0.5 to 5.0
seconds, depending upon the requirements of output device. The Delay menu
allows the delay time for each output to be set to match the output device. The
settings are for no delay (0.0) or a delay time of 0.5 to 5.0 seconds. For the best
results, choose the shortest delay time that produces seamless switching.