2-17CrossPoint 450 Plus and MAV Plus Switchers • Installation
External sync (MAV Plus video models only)
The MAV Plus switcher switches between inputs during the vertical interval
period, resulting in glitch-free video switching. The MAV switcher can use an
external signal to synchronize switching during the vertical interval. Without the
external sync locking feature, switching between inputs can result in a brief rolling
(sync loss) or a brief change in the picture size.
1
Ext(ernal) Sync connector — Connect an external sync signal to this BNC
connection for genlocking the video signal in broadcast or other sync-critical
applications.
Figure 2-21 shows a basic external sync configuration. The Ext Sync
connector receives the timing signal. A tee connector on the connector allows
the signal to be passed on to another video device, if required. Terminate the
tee connector if desired.
POWER
12V
0.5A MAX
LR
1
4
3
2
1
6
5
PAL
NTSC
BLACKBURST
BLACKBURST/
COLORBAR
-10dBV
+4dBu
1 2 3
ON
1 KHZ AUDIO
BBG 6 A
BLACK BURST/COLOR BAR
/AUDIO GENERATOR
EXT
SYNC
ETHERNET
REMOTE
RS232/RS-422
LINK
ACT
Terminate cable or
connect to another devic
Connect to
MAV Plus AV 3232.
Tee-connector
OUT
Extron
MAV Plus 3232
Matrix Switcher
RESET
Extron
BBG 6 A
Black Burst Color Bar
Audio Generator
Figure 2-21 — Simple external sync connection example
Figure 2-22 shows another configuration, in which the timing source passes
through three video cameras and a video scan converter before connecting to
the switcher. This type of video camera is capable of synchronizing with the
external timing source for video editing applications.
