External Sync Connection - Extron electronics SW6 AV MX AS User Manual

Installation, cont'd
See chapter 4, RS-232/Remote Control for definitions of the SIS
commands, details on how to install and use the control
software, and information on how to make a remote contact
closure device.

External sync connection

When the switching between inputs, the resulting image change
should be seamless, or clean. The A/V switchers 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.
External Sync In connector — Connect an external sync signal
7
to this BNC connection for genlocking the video signal in
broadcast or other sync-critical applications.
External Sync Out connector — Connect any downstream
equipment that requires genlocking to this BNC connector to
route the external sync signal throughout the system in
broadcast or other sync-critical applications.
Figure 2-7 shows a basic external sync configuration. The Ext
Sync In connector receives a timing signal. The Ext Sync Out
connector allows the signal to be passed on to another video
device, if required.
Timing source
OUT
SW6 SV A MX rear panel
Figure 2-7 —Simple external sync connection
example
Figure 2-8 shows a typical 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.
2-6 Audio/Video Switchers • Installation
IN
To next device
or terminate
Monitor
SW6 SV A MX
Sync timing source
(black burst generator)
Video camera Video camera
Figure 2-8 — Multiple device external sync
connection example
If no external sync timing source is connected to the switcher,
switching occurs immediately.
Audio/Video Switchers • Installation
VCR
VGA input
VSC 150
IN LOC K
GEN
Y
B/B-
G/Y RS-2 32
Y
R/R- S
O V
VIDE
S-VI DEO H
U O RGB
I T S-VI DEO B-Y/ Y
P N P U R-Y/
U T
T S S
40 V 0.3A MAC
100-2
VGA
50/60 Hz
Video camera
2-7