Figure 4-18.–The TV monitor control panel.
DIGITAL DISPLAY INDICATOR.— The digital
data indicator is a high resolution video monitor with
Figure 4-19.—A Display Control Console (DCC)
OJ-535(V)/UYQ-21(V).
a 10" x 13" CRT.
The digital display indicator
displays alphanumeric data from either a computer or
a keyboard and composite video graphics generated
by the C-DITEG. The graphics monitor can display
video in either a 525-line TV format or a 1075-line
TV format. The graphics monitor has either 20 or 22
variable function keys (VFKs) to send data to the
system computer.
The graphics monitor has four
functional areas: the monitor interface function, the
monitor deflection function, the video amplifier
function, and the power distribution function.
Monitor Interface Function.— The monitor
interface function controls the communications
between other functional areas of the graphics
monitor, controls the interface between external
equipments, and processes and distributes brightness,
contrast, and video selection from the front panel
controls.
The monitor interface function is controlled by the
interface
microprocessor.
The
interface
microprocessor controls the two-way exchange of
serial data between the graphics monitor and the
C-DITEG. It also monitors the front panel switches
and controls. If a VFK is depressed, the interface
microprocessor forms the serial input word for
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