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320 FSN Series • User’s Guide • Rev 01
7. Operations
Understanding Lookahead Preview
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This tutorial provides examples of PGM, PST and KEY bus selections, in combination with
button selections in the bank’s
Next Transition Group. The steps illustrate how these
selections affect the lookahead preview output.
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Use the following steps to learn how the BG button affects lookahead preview.
1. Select CAM1 on the PGM bus.
2. Select CAM2 on the PST bus.
3. In the Next Transition Group, press BG. This action arms the background layer
to transition.
Figure 7-6. M/E Bank: BG lookahead
Please note:
~ With BG selected, only the background will transition.
~ The PVW output shows the source selected on PST.
4. Press CUT or AUTO TRAN to cut, mix or wipe CAM2 from PST to the BG bus.
Tip
Follow along with the tutorial at the switcher’s control panel.
If you follow each step, you’ll see first-hand how the
PVW
output shows you what’s coming next.
The tutorial also applies to the
PGM bank. To follow along
with the tutorial on the PGM bank, use the
DSK instead of
KEY 1.
Preview Program
CAM1
CAM2
GFX
LOGO
BG
KEY
1
KEY
2
P
S
T
B
G
K
E
Y
BLACK
BLACK
BLACK