trains from the RAC, counts the pulses, and develops
the deflection voltages required for generating the
sweep circular raster.
ANALOG DEFLECTION FUNCTION.— The
analog deflection function controls the movement of
the CRT beam via the yoke on the neck of the CRT.
Major position data is received from the display
console and summed with the symbol waveforms
from the symbol generator or circle/ellipse waveforms
from the conies generator.
INTENSITY CONTROL FUNCTION.— The
intensity control function controls the blanking and
unblinking of the CRT beam and the brightness of the
display. The intensity control function also contains
compensation circuitry to ensure the intensity of the
display is uniform because of changes in the write
time of the display.
POWER DISTRIBUTION FUNCTION.— The
power distribution function contains the power
supplies to convert the input ac voltage to the levels
required by the BDU. Depending on the version of
the BDU in use, there are six or seven power supplies
in the power distribution function that develop the
following voltages: +5, +6.3, +15, -15, +30, +100,
+110, +600, +18,000, -26, -30, and -110.
TV Monitor
The TV monitor is a 7" x 9", 525 line, interlaced
monochrome monitor mounted to the top of the BDU.
It is shown in figure 4-16. The TV monitor has two
input channels and displays composite video. The
composite
video may be computer-generated
alphanumeric data, video from another monitor, or a
picture from an external video camera. The TV
monitor also has a video loop through connection to
allow the same information to be displayed on up to
five additional monitors. Figure 4-17 shows the block
diagram of the TV monitor.
VIDEO CONTROL FUNCTION.— The video
control function receives signals from the control
panel that allow the operator to control the brightness
and contrast of the raster and select which of the two
video sources will be displayed on the CRT. The TV
Figure 4-16.–The TV monitor.
monitor control panel is shown in figure 4-18.
The raster control signals and the composite video
input signals are used by the video control function to
generate the CRT drive signals. The horizontal and
vertical blank signals from the sweep generator
provide the timing for the video function to blank the
CRT during horizontal and vertical retrace.
SWEEP GENERATOR FUNCTION.— The
sweep generator function develops the signals to drive
the horizontal and vertical deflection yokes and
generates timing signals required by the video control
function.
DISPLAY CONTROL CONSOLE
OJ-535(V)/UYQ-21(V)
The
display
control
c o n s o l e ( D C C )
OJ-535(V)/UYQ-21(V) is a high resolution graphics
console that provides a man-to-machine interface for
the display and control of command and control data.
Figure 4-19 shows one configuration of the
4-15
