Change Scan Rate, Change Test Pattern | Extron electronic VTG 200

Operating the Video Test Generator

Change Scan Rate

An active scan rate can be changed at any time by holding the SELECT button and pressing the ▼ or ▲ button.

Change Test Pattern

With an active scan rate (Timer LED = green), press the ▼ or

▲button repeatedly to step through the available test patterns. The test patterns will appear in numerical order 1-16 as shown in chapter 4.

Change Test Pattern Color

While displaying a test pattern, hold the MODE/ON button and press the ▲ button to step through the 8 color combinations.

Auto-sequence the Test Patterns

To set the VTG to Auto-sequence mode, a scan rate must be active; hold MODE/ON and press the ▼ button. The Timer LED will turn orange in Auto-sequence mode and the 16 test patterns will cycle sequentially at 5 second intervals. To exit Auto-sequence mode, hold MODE/ON and press the ▼ button. The Timer LED will turn green and a single test pattern will be displayed on the output screen.

NTSC/PAL LED (VTG 200 only)

Normally off, this LED will turn green when an NTSC or PAL scan rate is activated indicating that a test pattern is available at the NTSC/PAL BNC connector.

Timer

The VTG timer will time-out (if not disabled) when a test pattern has been displayed for five minutes to prevent CRT burn-in. When this happens, the LED will flash red and green alternately. To turn the video back on, press the MODE/ON button. The timer feature can be disabled by pressing the ▼ and ▲ buttons at the same time. When disabled, the Timer LED will turn red.

Operating the Video Test Generator

Unless it is disabled, the timer will begin its countdown to time-out when the Timer LED turns green (indicating that a single test pattern is being displayed). The countdown restarts each time any button is pressed.

_ When a time-out occurs, only the video display will be cut off; the sync will remain active, even while the video is muted, thus convergence settings will not be lost.

Add Sync to a Video Line

Sync may be added on the green video channel by holding down the MODE/ON button and pressing the SELECT button. The Sync LED will turn green. Repeat this procedure to add sync to all three video channels. The Sync LED will then turn red. Repeating this procedure one more time will then return the VTG to separate sync output, and the LED will be off.

Sync Output Selection

The default sync output depends on the scan format. That is, if Sync on Green is normal operation for the chosen format, that is what the VTG will provide. Sync output can be configured four ways to accommodate the output device.

•RGB with composite horizontal and vertical sync

•RGB with separate horizontal and vertical sync

•RGB with Sync on Green

•RGB with sync on red, green, and blue

The vertical sync is provided on the BNC connector marked V. Depending on the position of the toggle switch, the H/HV connector can have either a separate horizontal sync, or a composite horizontal/vertical sync.

For example: for composite sync output, put the toggle switch in the HV position and don't use the V connector. For separate H & V sync output, put the switch in the H position and connect cables to both the H/HV and the V connectors. For details, see chapter 2.

Power Off

The VTG power may be turned off by simultaneously pressing the ▼ and ▲ buttons when the VTG is in the inactive state (the Timer LED is off). If the VTG is active (the Timer LED is on), press and release SELECT first.

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Extron • VTG 150 & VTG 200 • User’s Manual

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