Functions
of
Controls and Terminals
o 0 0 0
E;)a=JE;)
00
00
OFF-INTENSITY - Applies
power
to
the
instrument
and
in-
creases intensity of
the
trace
on
the
screen of
the
cathode-ray
tube
when
control
is
turned
clockwise
from
"OFF"
position.
FOCUS - Adjusts
the
sharpness
of
the
trace. Normally requires
adjustment
when
setting
of
the
INTENSITY
control is
changed.
000
0
o 0 0 0
v
POS
- Adjusts vertical posi-
tion of trace.
H
POS
- Adjusts horizontal po-
sition of trace.
o
000
• 6 •
V-CAL - Adjusts sensitivity, or
calibrates vertical amplifier to cor-
respond with positions on V
RANGE switch.
°n°
O~O
000
0
E;)c=~
00
00
00
00
V RANGE -
In
"CAL"
position,
disconnects vertical amplifier from
input
connector,
and
supplies a
calibrating voltage which should
be
adjusted
with "V-CAL" control
to
full-screen deflection. Adjusts over-
all sensitivity of vertical amplifier
in
"3-to-l"
steps. Automatically
changes
bandwidth
of vertical amplifier when going
from ".2" to ".6" positions.
V INPUT -
Feeds
the
input sig-
nal to
the
vertical amplifier through
the
attenuator
circuits.
:0:
000
°
&c=
~
'lac
00
SYNC - Selects the source of
the
synchronizing signal.
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RCA
WO-33A Cathode-Ray Oscilloscope iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
:0:
o~/=o~o
~c
00
GND - Connected directly to case
and
chassis.
H/SWEEP
SEL
- Selects
the
frequency
range
of
the
sweep
os-
cillator.
Used
in conjunction with
the
SWEEP
VERNIER
control.
Also switches
the
Horizontal Amp-
Mer
to
"H
INPUT"
or to a sine-
wave sweep voltage of power-line
frequency.
0(jJ}0
o 0
000
00
00
SYNC/PHASE - Controls
the
amplitude
of
the
synchronizing
voltage applied to
the
grid of
the
sweep oscillator; should
be
adjusted
to minimum setting necessary to
lock
pattern
in a stationary position.
Works zero-center for internal
sync. Adjusts external sync by reg-
ular clockwise rotation. Also controls phase of
the
sinusoidal
sweep
voltage
when
the
H/SWEEP
SEL
switch is in
the
"LINE"
position.
• 7 •
:0:
EXT
SYNC/H
INPUT
- An
external synchronizing signal for
the
sweep
oscillator should
be
con-
nected
between
this terminal
and
the
ground
terminal.
The
"SYNC"
switch should
be
set to "EXT". An
external signal for the horizontal
amplifier should also be connected
between this terminal
and
the
ground terminal
and
the
H/SWEEP
SEL
control set to
"H
IN". A positive-
going signal will cause
the
spot to deflect to
the
right; a negative-going signal will cause
the
spot to
deflect to
the
left.
SWEEP
VERNIER - Provides
continuous control of
the
oscillator
sweep frequency over
the
range
selected by
the
SWEEP
controL
Also provides overlap
of
the
SWEEP
control positions.
0QO
o 0
000
0Q
o 0
000
H GAIN - Adjusts
the
gain of
the
horizontal amplifier
and
varies
the
width
of
the
horizontal trace.
Does not provide
enough
control
to
reduce
trace length to zero.
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