Extron electronic 3200, 7200 manual Switch Reference Connections

Switch Reference Connections

FSwitch Reference connectors for bi-level and tri-level sync (see figure 3 on page 8 and figure 4 on page 9) — (SDI / HD-SDI inputs and outputs only) Connect an external sync signal to this BNC connector to genlock the video signal in broadcast or other sync-critical applications.

The switcher makes ties to inputs on SDI/HD-SDI I/O boards during the vertical interval period of the tied video, resulting in glitch-free video switching when the input devices are also using the same sync timing. The FOX Matrix Switcher can use an external signal to synchronize switching during the vertical interval. Without this external sync locking feature, switching between inputs could result in brief video or picture rolling (sync loss) or a brief change in the picture size.

Figure 11 shows a basic external sync configuration. The Bi-level or Tri-level sync connector receives the timing signal. A tee connector attached to the cable allows the signal to be passed on to another video device, if required. Terminate the tee connector if desired.

BBG 6 A

BLACK BURST/COLOR BAR /AUDIO GENERATOR

POWER	1 KHZ AUDIO	NTSC
12V	+4dBu
0.5A MAX	L 1 R ON
	1	2	3
	-10dBV PAL

Extron

BBG 6 A

Black Burst, Color Bars,

and Audio Generator

1	3	5
		OUT
BLACKBURST/ 2	4	6
COLORBAR	BLACKBURST

25 - 32 17 - 24

OUT

A

AB

Tee-connector

Terminate cable or connect to another device.

Connect to

FOX Matrix 3200.

	TRI-LEVEL BI-LEVEL RESET	100-240V	50/60Hz 1.2A MAX.
REMOTE RS-232/RS-422		DISCONNECT BOTH POWER CORDS BEFORE SERVICING	PRIMARY REDUNDANT
LAN ACT LINK
	SWITCH	100-240V	50/60Hz 1.2A MAX.
	REFERENCE

Extron

FOX Matrix 3200

Matrix Switcher

Figure 11. Simple FOX Matrix Switcher External Sync Connection Example

Figure 12 on the next page 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.

NOTE: The Switch Reference connectors are tied into the I/O grouping feature of the switcher:

•Ties to any input in I/O group 1 use the tri-level sync reference.

•Ties to any output in I/O group 2 use the bi-level sync reference.

See I/O grouping on page 33 to assign sync-critical inputs and outputs to the appropriate I/O groups.

If no external sync timing source is connected to the switcher, switching occurs immediately.

FOX Matrix 3200 and 7200 Switchers • Installation 15