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Target Voltage Adj.
a,
Preset Set-up level as described above.
b.
Set the power switch to STANDBY
and allow a
few minutes for warmup.
ec.
Adjust the scope's controls to display two
horizontal sync pulses.
d.
Adjust R215,
Target Voltage,
to produce a
"white" signal of 0. 25 to 0.3 v, as shown in
Fig. 3-5c.
The white or positive-going part
of the signal represents the vidicon's
dark
current.
The average dark current should
produce about 0. 3 volts of positive-going signal.
Sync Level Adj.
a.
Set the power switch to ON and point the
camera at a test pattern 2.5 ft from the lens.
b.
Adjust Sync Level, VR-4, to produce a sync
level of 0.45 to 0.50 volts, as shown in Fig.
3-6.
White Clip Adj.
a.
Point the camera at ceiling-mounted fluorescent
lamps (at least 8 feet away).
b.
Adjust White Clip, VR-3,
so that peak whites
just show signs of clipping, and peak white
is limited tol .4volts'above the blanking level.
Freq
Characteristic Adj.
a.
Connect the camera to the Videocorder and
set up the recorder in the camera E-to-E
mode.
:
b.
Point the camera at the test pattern and.
0.25-0 .30volts
adjust optical focus for the sharpest poss-
ible picture.
(c)
c.
Watch the screen of the monitor and adjust
Fig.
3-5.
SET-UP
AND
TARGET
VOLTAGE
VR-1
for maximum
resolution
without
over-
SETTING
WAVEFORMS.
shoot or ringing
appearing
in the picture.
0.75-1.2V
VIDEO
:
SYNC
0.45-0.50V
SYNC. LEVEL ADJ
—#e
= —
j
E
ina
Fig.
3 6.
SYNC
LEVEL
ADJUSTMENT.
3-4
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