
16
Input Board
Ref
Var
Gain
Ext
Ref
Audio
In
Video
In
Video
Out
Front
Panel
Keys
Part of
mP
Rasterizer
and
Graphics
Vert
Defl
Horiz
Defl
Instrument
Control
Bottom Board P/O Top Board
LCD Display
and Backlight
Backlight
Power
Supply
Board
RGB
P/O Top Board
Part of
mP
Timing
Subcarrier
Oscillator
Timing
Sel Vid
Backlight
Brightness
RGB
Sweep Trig
Fuse
Fuse
DC In
11–18 VDC
Battery
Sync
Separator
Power Supply
and Battery
Charger
±8 VDC
+5 VDC
Vector
±8 VDC
+5 VDC
Control DAC
(16 analog
Outputs)
Audio
Headphone
NTSC (or PAL)
Decoder (Self
contained
subcarrier
regenerator)
Burst
Lock
Vectorscope
(Including Ø
shifter)
Clamp
Video
Out RGB from
Rasterizer
and Graphics
Video In
LPF
B–Y
Fsc
R–Y
DSync
Display
Brightness
and View
Adjust
2
RGB
Figure 3–1: Simplified block diagram