Extron electronic SW6 SA MX External sync connection, Installation, cont’d, SW6 SV A MX

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.

7External Sync In connector — Connect an external sync signal 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.

OUT Timing source

IN

To next device

or terminate

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.

VCR
Monitor
VSC 150	VGA input

SW6 SV A MX

Sync timing source (black burst generator)

Video camera 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.

2-6 Audio/Video Switchers • Installation Audio/Video Switchers • Installation 2-7