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WFM ā300A BLOCK DIAGRAM
CLAMP
LOW PASS
FILTER
S
OMPOSITE
CH1
CH2
CH3
CLAMP
PULSE
DC REST
OFF
AC CPL’D
DC REST
CH 2 & 3
POS
CH 2 & 3
POS
BUFFER
LED
DRIVER
BUFFER
I/O
I/O
m PROCESSOR
CLOCK
CH 1
CH 2
CH 3
CH 1
CH 2
CH 3
COLOR
DIFF
TO GBR
TRANS-
CODER
64
I/O
187.5
kHz
CH 1
CH 2
CH 3
/V GREEN
SELECT
/V BLUE
SELECT
/V RED
SELECT
FRONT
PANEL
REMOTE
EXT
REF
RAMP SEL, RATE 1, H MAG 1 SEL, H MAG 2 SEL, H MAG 3 SEL, 187.5 kHz, & SYNC BLKEN
CLAMPED
AMPLIFIERS
FIELD REC &
TIMING LOGIC
GAMUT LIMIT
COMPOSITE
OUTPUT
CALIBRATOR
V GAIN
V CAL
EXT
SELECT
INT
COMPOSITE
SELECT
H RED
SELECT
H BLUE
SELECT
SYNC
BLKEN
CLAMP
PULSE
CLAMP
PULSE
B
G
R
+ GAMUT LED
– GAMUT LED
PIX MON
OUTPUTS
+
–
LINE
STEP
RAMP GEN,
HORIZ POS
& MAG AMPL
H CAL
GRATADD1 1 THRU –7, BLANK 187.5 kHZ
H GAIN
H SYNC, FIELD
CAL
TIME
NO
INPUT
Y INVERT
INTENS
SCALES
HI VOLTS
GRATICULE
LIGHTS
GRAT LIGHT
SELECT
VDAC
HVAC
Z–AXIS
CONTROL
HORIZ
VECTOR
GEN
VERT
VECTOR
GEN
COLOR
SHUTTER
DRIVER
GRAT SEL
2.93 kHZ
COLOR
SHUTTER
TRACE
ROTATION
FOCUS
GRID DRIVE
V
H
INTENS
ADDRESS
BUS
/COMPOSITE
SELECT
CLAMP
PULSE
CLAMP
PULSE
LTNG
SELECT
V DIFF
SELECT
DIFF STEP
X5
BOWTIE
V FLAT
SELECT
V LOW
SELECT
V LOW
SELECT
FIELD
GATE
CLAMP AND
LOWPASS FILTER
TRANSITION
INTENSIFIER
ELECT
GRAT
GEN
S
SYNC STRIPPER