Extron electronic VTG 150, VTG 200 user manual Operating the Video Test Generator

Operating the Video Test Generator

Operating the Video Test Generator

Connect the video test generator to the device to be tested. (See Connecting the VTG Output Cables in chapter 2.)

Power On

Press the MODE/ON button to turn VTG power On. The LCD display cycles through six instructional menus (Main Menu) that tell how to operate the video test generator. The first is the identification screen (shown in the picture above). The other five are shown to the right.

Timer LED

The color of the Timer LED identifies the current operating state of the VTG. The possible Timer LED colors are:

•Off = VTG inactive (no scan rate selected)

•Green = VTG active (scan rate is selected), timer is running.

•Red = VTG active (scan rate is selected), timer is disabled.

•Blinking red & green = Time-out occurred, video is muted.

•Orange = VTG is in Auto-sequence mode, timer is disabled.

Operating the Video Test Generator

Exit the Instructional Menu Cycle

To exit the instructional menu cycle, press the ▼ or ▲ button. A scan range will be displayed on the LCD screen.

View the Scan Ranges

To view the available scan ranges (i.e. TTL, VGA, Mac), hold the MODE/ON button down and press the ▼ or ▲ button. The LCD will display a different scan range each time the button is pressed. Stop when the desired scan range is displayed by the LCD.

_ There are several scan rates within each scan range. If the desired scan range is unknown, the tables in chapter 4 may be helpful. However, be aware that an updated VTG may offer scan rates that are not listed in the tables. Stepping through the scan ranges and scan rates on the VTG device will show all available scan formats.

View the Scan Rates

Press either the ▼ or ▲ button to step through the scan rates (i.e. CGA, Mac II, XGA). Continuously pressing the ▼ or ▲ button will step through all scan rates of all scan ranges. To change to a different scan range while viewing the scan rates, press and hold the MODE/ON button and press the ▼ or ▲ button.

Activate a Scan Rate

Press the SELECT button when the desired scan rate appears on the LCD readout. When the selection is made, the Timer LED will turn green and a dot test pattern will appear on the output screen of the device under test. This is test pattern #1.

To return to the main menu after activating a scan rate (cancel the scan rate), press the SELECT button.

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