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Video Gate Buttons
The Video Gate buttons turn individual color out-
puts on and off. They also control the adsdition of
primary color information to the NTSC / PAL video
outputs on the 801GX.
• The R push-button turns all of the red video
outputs on and off.
• The G push-button normally turns all of the
green video outputs on and off. When a 2-bit
digital monochrome (MDA) signal is being
generated, the G push-button turns the I (in-
tensity) signal of the video pair on and off.
• The B push-button normally turns all of the
blue video outputs on and off. When a 1 or 2-
bit digital monochrome signal is being gener-
ated, the B push-button turns the V (video)
signal on and off.
❖ The master output gating button overrides the
settings of these buttons when turned off.
Many of the built-in analog video signal formats are
stored with the RGB video signal type selected. If
you are testing a monochrome monitor with the same
timing, you can toggle between color and mono-
chrome modes by pressing both R and B push-but-
tons simultaneously.
❖ An “m” appearing to the left of the image loca-
tion on the LCD window indicates that mono-
chrome analog video has been selected.
Analog
Monochrome
Operation