Hitachi V-151F User manual
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WARRANTY
This
Hitachi
Denshi,
Ltd.
product
is
warranted
against
defects
in
workman
ship
and
materials.
If
any
failure,
resulting
from
a
defect
in
either
workman
ship
or
material,
shall
occur
under
normal
use
within
two
years
from
the
original
date
of
purchase,
such
failure
shall
be
corrected
free
of
charge
to
the
original
purchase
by
repair
or,
at
Hitachi
Denshi's
sole
option,
replacement
of
the
defective
part
or
parts.
No
charge
shall
be
made
for
labor
or
services
performed
during
said
two
years
period
providing
the
product
is
brought
to
our
Authorized
Service
Station.
Hitachi
Denshi,
Ltd.
will
either
repair
or
at
its
sole
option,
replace
any
part
except
for
cathode
ray
tube,
fuses,
probes,
lamps,
batteries
and
other
op
tional
materials
which
are
defective
in
either
workmanship
or
material
under
normal
and
proper
use.
This
warranty
does
not
cover
equipment
which
has
been
tampered
with
in
any
way,
or
damage
caused
by
accident,
negligence,
alteration,
or
misappli
cation.
This
product
must
be
returned
transportation
prepaid,
properly
packed
and
insured.
This
warranty
applies
only
to
the
original
purchaser.
NO
OTHER
WARRANTIES
ARE
EXPRESSED
OR
IMPLIED.
Hitachi
Denshi,
Ltd.
IS
NOT
LIABLE
FOR
CONSEQUENTIAL
DAMAGES.
©
¥
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CONTENTS
Page
1.
Introduction
1
1.1
Outline
1
1.2
Specifications
1
1.3
Composition
3
2.
Operation
4
2.1
Description
of
Panel
Functions
4
2.2
Precautions
9
2.3
Fundamental
Operation
Instructions
lo
3.
User
Adjustments
16
4.
Applications
17
4.1
Measurement
of
rise
(fall)
time
17
4.2
Measurement
of
Composite
video
signal
18
5.
Schematic
Diagrams
2o
NOTE
o
This
Instrument
should
be
adjusted
at
an
ambient
temperature
of
+20°C
for
best
overall
accuracy.
Allow
at
least
15
minutes
warmup
before
proceeding.
o
Polyvinyl
chloride
(PVC)
film
is
attached
on
the
enclosure
and
the
front
panel
of
the
oscilloscope
to
protect
the
metal
surface.
If
the
PVC
film
is
damaged
by
scratches,
remove
it.
o
To
clean
the
enclosure
or
the
front
panel,
use
neutral
deter
gent.
Refrain
from
using
thinner,
benzine,
alcohol
or
other
chemicals.
o
For
safety
operation,
the
instrument
chassis
and
cabinet
be
sure
to
connect
the
ground
lead
of
the
GND
(ground)
terminal
to
earth
ground,
if
a
two-wire
AC
power
system
is
used.
Failure
to
complete
the
ground
system
may
allow
the
chassis
and
cabinet
of
this
instrument
to
be
elevated
above
ground
potential
and
pose
a
shock
hazard.
1.
Introduction
1.1
Outline
Model
V-151F
is
a
single
trace
oscilloscope
with
a
bandwith
of
DC-15MHz
and
sensitivity
of
ImV/DIV
(Pulled
x5
Gain).
The
time
base
provides
a
maximum
sweep
speed
time
of
0.2uS/DIV.
When
magnified
by
10,
the
sweep
speed
is
lOOnS/DIV.
High
accelerated
voltage
CRT,
with
8
x
iqdiv
effective
display
area
and
post
acceleration,
enables
high
speed
pulses
to
be
clearly
displayed.
Engineered
for
service
in
the
field
of
television,
VTR,
and
computer,
the
V-151F
is
portable,
easy
and
features
convenient
operation
for
use
in
education
and
industry.
o
Wide
bandwidth
and
high
sensitivity
In
addition
to
wide
bandwidth,
DC-15MHz,
(-3dB)
this
instrument
provides
high
sensitivity
of
5mV/
DIV.
A
15
MHz
frequency
is
obtained
with
im
proved
triggered
synchronization.
o
Bright
CRT
By
using
a
new,
highbrightness
CRT,
a
stable
ac
celerated
CRT
high
voltage,
calibration
voltage
accuracy,
and
time
base
are
obtained.
o
TV
Synchronization
A
circuit
for
extracting
the
synchronizing
signal
is
equipped
to
trigger
easily
with
a
composite
video
signal.
TV
vertical
or
horizontal
sync
signal
is
automatically
selected
by
the
time
base
switch.
o
Improvement
in
portability
and
operation
Equipped
with
a
convenient
carrying
handle
and
designed
for
light
weight,
this
unit
is
excellent
both
in
portability
and
operation
with
various
functions
installed
on
the
front
panel.
o
X-Y
functions
Set
the
switch
to
X-Y.position
and
X-Y
oscillo
scope
is
displayed
with
EXT
TRIG
OR
[x]
IN
as
X
axis
and
INPUT
as
Y
axis.
1.2
Specification
CRT
Display
Type
130BUB31
Acceleration
Voltage
2kV
Effective
display
8
x
lO
DIV
(1
DIV=9.5m)
area
Vertical
amplifier
5mV/DIV
~
5V/DIV
Sensitivity:
Calibrated
in
10
steps
(1-
2-5
Sequence
up
to
about
Bandwidth
Rise
time
Input
impedance
Input
coupling
Max.
Input
voltage
Input
connector
CHI
output
Output
voltage*
Bandwidth*
Output
Noise*
2.5
times
on
each
position
with
variable
control)
*
ImV
-
IV/div
(using
x5
GAIN)
DC
to,
15MHz
DC
to
5MHz
(using
x5
GAIN)
Typical
24ns
IMn
shunted
by
30pF
+5pF
(direct)
AC,
GND,
DC
600Vp-p,
300V
(DC+AC
peak)
BNC
20mV/div
Min.
50Hz-5MHz(-3dB)(at
xl
GAIN)
lOmVp-p
Max.
*
Measured
by
Im
50-ohm
BNC
Cable
with
50—ohm
terminator.
Approx.
50f2
AC
Output
impedance
Output
coupling
Time
base
Sweep
speed
Magnification
X-Y
display
0.2us
-
0.2s/div
19
step,
1-2-5
sequence
xlO
(max
speed
100
ns/div)
X=EXT.
TRG
or
\Y\
IN,
Y=INPUT
Sensitivity
Y
axis:
5mV/div
-
5V/div
X
axis:
approx.
0.2V/div
Bandwidth
X
axis:
DC
500
kHz
X-Y
phase
shift
Less
than
3°
at
10
kHz
Synchronization
Trigger
sensitivity
Frequency
INT.
trig
EXT.
trig
20Hz
~
2MHz
0.5DIV
200
mV
2MHz
-
15MHz
1.5DIV
800
mV
MODE
Source
NORMal
trigger
and
AUTO-
matic
trigger
Automatic
(sweep
free-run)
Normal
(sweep
runs
when
triggered)
TV(+),
TV(-)
Extracts
the
synchronizing
signal
from
composite
video
signal
and
provides
stable
synchronization.
Slope
switch
is
selected
accord
ing
to
polarity
of
video
signals.
INTernal
or
EXTernal,
or
LINE.
Calibration
Waveform
Square
wave
IkHz
+10%
(typ)
Voltage
0.5
Vp-p
+3%
Power
supply
AClOO/120/220/240
V
Size
and
Weigh
190(H)x275(W)x400(D)mm8.5kg
[7.5(H)xl0.8(W)xl5.7(D)in
18.7
lbs]
1.3
Composition
(1)
V-151F
oscilloscope
1
(2)
AT-10AB1.5
Probe
1
(3)
Operation
manual
1
(4)
Power
supply
cord
1
2.
Operation
2.1
Description
of
Panel
Functions
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POWER/INTENSITY
Turns
the
power
on
or
off,
and
adjusts
trace
brightness
on
the
screen.
Clockwise
adjustment
increases
brightness;
Counterclockwise
rotation
decreases
brightness.
Pilot
lamp
Lights
when
the
power
is
on.
FOCUS
Adjusts
focus
grid
voltage
for
clarity
of
the
display.
TRACE
ROTATION
Corrects
slight
tilting
of
trace
caused
by
external
magnetic
fields.
INPUT
This
is
an
input
plug
for
use
with
the
vertical
amplifier
and
Y-axis
(vertical
axis)
amplifier
during
X-Y
operation.
Do
not
exceed
the
maximum
permissible
input
voltage,
600p-p
or
300V
(DC+AC
peak)
AC-GND-DC
(Alternating
Current-Ground
Switch-Direct
Current)
Switches
the
coupling
of
the
signal
fed
to
the
vertical
axis
input
.
DC
coupling
is
obtained
on
the
DC
position.
On
AC
position,
the
direct
current
component
is
blocked
by
a
capacitor.
The
GND
position
grounds
the
input
of
the
ampli
fiers
and
opens
the
input
terminal
(J).
Position
(PULL
x5
GAIN)
it
(Vertical
position
adjustment)
Clockwise
rotation
will
move
pattern
up,
and
counterclockwise
rotation
will
move
pattern
down.
When
the
knob
is
pulled,
the
vertical
axis
sensitivity
at
each
range
of
volts/DIV
is
in
creased
by
5
times.
VOLTS/DIV
This
is
a
knob
for
switching
the
sensitivityof
the
input
signal
fed
to
INPUT
(s).
Switching
action
is
accomplished
in
10
steps
from
5mV/DIV
to
5V/DIV.
On
X-Y
operation,
the
knob
functions
to
change
the
sensitivity
of
the
Y-axis.
To
measure
by
the
use
of
the
indicated
voltage
sensitivity,
be
sure
to
set
the
VARIABLE
to
CAL
by
turning
it
fully
clockwise
(Click
stop).
If
the
signal
is
applied
to
the
input
terminal
(J)
by
the
use
of
a
1/10
low
capacitance
probe,
the
values
are
ten
times
the
indicated
voltage.
VARIABLE
This
is
a
vertical
axis
sensitivity
fine
adjuster
which
is
capable
of
attenuating
to
less
than
1/2.5
by
indication
of
each
range
of
VOLTS/DIV.
VARIABLE
knob
Amplitude
increases
Q
o
CAL
^
000-
Amplitude
decreases
To
measure
a
voltage
by
the
use
of
voltage
sensitivity
indicated
by
VOLTS/DIV,
turn
the
VARIABLE
clockwise
fully
to
CAL.
(Click
stop).
CAL
.5V
(Calibration
wave)
Signal
output
terminal
for
amplitude
and
probe
calibration.
The
frequency
is
approx.
IKHz.
J
1_
1°'
5Vp-p
TIME/DIV
(Sweep
speed
selection)
This
is
sweeptime
change
switch.
A
19-position
switch
from
0.2yS/DIV
to
0.2S/DIV
selects
19
fixed
sweep
speeds.
When
making
a
measurement
at
a
given
TIME/DIV
setting,
adjust
variable
knob
fully
clockwise
to
CAL.
When
the
switch
is
set
to
(X-Y)
position,
X-Y
oscillo
scope
works
with
EXT.
TRIG
or
[X]
IN
as
X
axis
and
INPUT
as
Y
axis.
SWP
or
[X]
VAR
(Time
adjustment
of
Sweep
Time
and
sensitivity
fine
adjustment
of
X
axis)
This
is
fine
adjustment
covering
time
not
covered
by
Time
change-steps.
When
measuring
with
an
indication
of
TIME/DIV,
turn
VARIABLE
fully
clockwise
to
CAL.
(Click
stop).
SWP
VAR
O)
CAL
o
Expanded
mium
Contracte
d
In
X-Y
operation,
this
is
a
horizontal
axis
sensitivity
fine
adjuster
which
is
capable
of
attenuating
from
about
0.2V/DIV
to
zero.
POSITION
(PULL
xio
MAG)
The
knob
is
used
to
position
the
trace
in
the
horizontal
direction.
When
the
knob
is
pulled
out,
the
sweep
is
magnified
by
a
factor
of
10.
LEVEL
(Slope)
The
control
knob
is
used
to
adjust
the
trigger
ing
level
of
the
sweep.
In
operation,
the
knob
is
generally
at
the
AUTO
setting.
When
trig
gered
sweep
is
desired
against
the
positive
slope
of
waveforms
displayed
on
the
screen,
set
this
switch
to
(+)
position,
and
against
nega
tive
slope,
set
it
to
(-)
position.
whether
circuits
are
performing
nor
mally
.
MODE
o
AUTO;
o
NORM:
o
TV(+),
When
there
is
no
signal
or
a
signal
stepping
out
of
synchronization,
the
sweep
line
will
appear
automatically.
This
mode
provides
synchronizing
sweep
only
when
synchronization
is
required.
If
there
is
no
signal
or
a
signal
stepping
out
of
synchronization,
the
sweep
line
will
not
appear.
This
mode
is
employed
for
synchronizing
a
low
frequency
signal
of
more
than
20Hz.
TV(-)
Video
signals
synchronized
with
hori
zontal
sync
pulse
and
vertical
sync
pulse
is
observed.
Composite
vedeo
signals
can
be
observed
at
various
stages
of
the
TV
receiver
to
determine
SOURCE
INT
:
LINE;
EXT
Used
when
synchronization
is
make
by
observing
signal
for
INPUT.^
Used
when
observing
a
signal
synchro
nized
with
the
frequency
of
AC
power
source.
Used
when
synchronization
is
make
by
a
signal
applied
to
EXT
input
connector
,
independently
from
observation
signal.
IP
EXT
TRG
or
[X]
IN;
This
is
an
input
BNC
connector
for
ex
ternal
sync
signal
or
X
axis.
GND
;
This
is
the
ground
terminal
of
oscil
loscope
.
Graticule
The
size
of
graticule
is
8
by
10
div
(1
div=9.5).
A
sub-scale
at
intervals
of
1/5
DIV
is
imprinted
on
the
X
and
Y
axis
of
the
graticule
to
facili
tate
of
making
measurement.
Vertical
Voltage
sensitivity
(VOLT/DIV)
and
Sweep
time
(TIME/DIV)
is
calibrated
and
can
be
read
with
reference
to
the
sub-scales.
2.2
(1)
EXT.
BLANKING
This
is
a
terminal
for
applying
a
blanking
signal
from
an
external
source.
The
trace
dis
played
on
the
screen
may
be
intensity
-
modu
lated
where
pulse
signal
or
time-scale
marks
are
required.
5V
AC
signal
applied
at
the
con
nector
on
the
rear
of
the
oscilloscope
will
pro
vide
alternate
brightness
and
blanking
of
the
trace.
Positive
voltage
input
decreases
bright
ness
.
Power
Supply
Cord
Connecting
Terminal
FUSE
The
fuse
is
released
when
the
cap
is
rotated
counterclockwise.
FUSE:
lA
6.350
31.8
(mm)
Caution
-
Replace
only
with
same
type
and
rating
fuse.
CHI
OUTPUT
Output
connector
providing
a
sample
of
the
signal
applied
to
the
vertieal
input
connector.
This
connector
is
used
for
driving
a
frequency
counter
or
other
instrument.
Precautions
Power
Source
Voltage
Apply
a
power
source
voltage
that
is
within
+10%
of
the
ratedvalues
as
given
in
the
table
below.
Operation
with
a
voltage
less
than
10%
of
rated
value
may
result
in
improper
performance
and
a
voltage
more
than
10%
of
the
rated
value
may
damage
power
supply
circuitry.
Rated
Voltage
Values
Applicable
Voltage
Ranges
Fuse
lOOV
AC
120V
AC
90
-
llOV
108
-
132V
2A
Fast
Blow
220V
AC
240V
AC
198
-
242V
216
-
264V
lA
Fast
Blow
(2)
Signal
Input
Vertical
input
INPUT
MAX
600V(AC
peak),
terminal
300V
(DC
+
AC
peak)
External
synchro-
50V
(DC
+
AC
peak)
nizing
signal
and
X
input
terminal
EXT
BLANKING
30V
(DC
+
AC
peak)
(3)
Horizontal
Trace
Tilt
Horizontal
trace,
in
some
case,
tilts
due
to
the
earth's
magnetism.
(4)
Operation
in
a
Powerful
Magnetic
Field
Operation
in
a
powerful
magnetic
field
will
cause
distortion
of
waveforms
or
make
traces
tilt
excessively.
Special
care
should
be
exer
cised
when
operating
the
instrument
close
to
machinery
or
equipment
using
a
large
trans
former
.
(5)
FUSE
Note
the
type
and
rating
of
the
fuse
used.
(6)
Operation
in
a
Hot
and
Humid
Place
This
instrument
is
designed
to
operate
in
a
tem
perature
range
of
0°C
to
+40°C
and
humidity
range
of
40
to
90%.
Operation
in
a
servere
environment
may
shorten
the
life
of
the
instru
ment
.
(7)
Intensity
A
burn-resisting
fluorescent
material
is
used
in
the
cathode
ray
tube.
If
the
cathode
ray
tube
is
left
with
a
bright
dot
or
bright
line,
or
with
unnecessarily
raised
intensity,
its
fluorescent
screen
may
be
damaged.
When
observ
ing
waveforms
the
intensity
should
be
maintained
at
the
minimum
necessary
level.
If
the
instru
ment
is
left
on
for
extended
periods,
lower
the
intensity
and
obscure
the
focus.
(8)
EXT.
BLANKING
When
a
cable
is
connected
to
the
EXT
BLANKING
connector
don't
place
the
oscilloscope
in
an
upright
position
to
prevent
damage
to
the
cable.
(9)
The
highest
sweep
speed
is
100
ns/DIV.
Sweep
time
switch
can
be
changed
from
0.2us/
DIV
to
0.2s/DIV
in
accordance
with
your
re
quirements,
and
by
using
the
knob
,
the
sweep
time
is
magnified
by
10
in
each
range.
Therefore,
as
permissive
ranges
of
magnified
sweep
speed
one
0.lys/DlV-O.2s/DIV,
don't
use
xlO
MAG
at
0.2US/DIV,
0.5us/DIV.
(10)
Caution
for
using
the
measured
signal
as
an
external
sync
signal.
When
using
the
measured
signal
connected
to
the
INPUT
and
EXT
TRIG
connectors
as
an
exter
nal
sync
signal,
use
a
divider
so
that
the
both
connectors
are
not
connected
directly.
Other
wise,
the
measuring
waveform
may
be
distorted
or
oscillated.
2.3
Fundamental
operation
for
observing
waveforms
with
the
Oscilloscope
V-151F
are
described
below.
(1)
Preparation
Before
using
the
V-151F
set
the
controls
as
follows.
In
addition,
use
these
setting
when
checking
proper
operation
of
the
instrument.
10
1.
FOCUS
(3)
2.
AC
GND
DC
@
3.
Position
(?)
4.
VOLTS/DIV
5.
VARIABLE
6.
TIME/DIV
(U)
7.
SWP
or
[X]
VAR
(S)
8.
Position
(PULL
MAG.
xio)
9.
LEVEL
@
PULL
(-)
SLOPE
10.
MODE
@
11.
SOURCE
(16)
Midposition
DC
Midposition
(push)
10
mV
Turn
fully
clockwise
to
CAL
0.5mS/DlV
Turn
fully
clockwise
to
CAL
Midposition
(PUSH
IN
X
1)
Midposition
Push-in
(+)
SLOPE
AUTO
_
INT
After
all
settings
are
made,
set
the
POWER/INTENCITY
switch
ON,
and
adjust
the
knob
at
midpositions.
After
about
10
seconds,
a
bright
line
will
appear
on
screen.
Adjust
the
FOCUS
controls
for
a
clear
display
of
the
traces.
12.
Connect
the
attached
probe
in
INPUT
(J)
and
CAL
terminals.
For
use
of
the
probe,
refer
to
Section:
"How
to
Use
a
Low-Capacity/
Direct
Probe."
(2)
Check
of
Gain
by
Calibrated
Waves
After
all
settings
are
made
as
shown
in
2.3
(1)
ascertain
that
a
square
wave
with
an
amplitude
of
5
DIV.
is
displayed
on
the
screen.
This
indicates
that
the
instrument
is
operating
properly.
(3)
How
to
use
a
Low-capacitance/Direct
Probe
No.2110
No.2520
ITEM
SPECIFICATIONS
ACCESSORIES
Bandwidth
DC
~
30MHz
(+ldB)
DC
~
40MHz
(+3dB)
Pincher
tip
No.
2110
Input
R
=iOMn
Input
C
=22pF
(at
oscilloscope
input
25pF)
Cable
marker
No.
2520
ATT
Ratio
1/10
MAX
Input
voltage
600V
(DC+AC
Peak)
11
The
knob
and
hook
cover
may
be
turned
in
any
direction,
but
care
must
be
used
not
to
discon
nect
the
ground
over
that
holds
the
hood
cover
in
place
by
an
internal
spring,
which
could
loosen
or
break.
(4)
Measurement
The
probe
exhibits
high
resistance
and
low
capacitance
at
x
10
however,
the
input
voltage
is
attenuated
to
1/10
and.
This
must
be
accounted
for
in
voltage
measurements.
Measured
voltage
=
Sensitivity
of
oscilloscope
V/DIV.
X
screen
amplitude
div
x
10
At
x
10,
it
is
necessary
to
correct
the
pulse
characteristic
by
adjusting
the
capacitor
in
the
probe
for
flat
top
of
the
square
wave
calibration
voltage.
(5)
Adjustment
of
Probe
When
observing
the
signal
waveforms
of
high
impedance
circuits,
the
operation
of
the
signal
source
and
waveforms
on
the
screen
may
change
due
to
the
input
impedance
of
the
oscilloscope,
parallel
capacitance
of
a
coupling
line,
induc
tion
noise
and
other
effects
leading
to
measure
ment
error.
The
use
of
a
low-capacitance
probe
avoids
these
effects.
A
low-capacitance
probe
be
used
for
high
impedance
circuitry
measure
ments.
Its
input
impedance
is
lOMH
at
22pF.
When
adjusting
the
probe
observing
CAL
@
,
adjust
the
capacitance
correction
trimmer
in
the
probe
using
a
small
screw
driver,
to
pro
vide
proper
square
wave
compensation.
Capacitance
correction
trimmer
Under
Correct
Over
N
K-
12
(6)
Precautions
on
Direct
Connection
and
Using
a
Probe
Two
different
methods
are
available
for
applying
signals.
One
is
to
connect
a
lead
wire
to
the
input
terminal
of
the
oscilloscope
directly,
and
another
is
to
use
a
probe.
When
viewing
a
small
signal
in
a
circuit
having
high
signal
source
impedance,
error
may
occur
in
measurement
due
to
the
effect
of
parallel
capacity
or
induced
noise
in
the
input
cable.
The
following
precautions
should
be
observed
to
avoid
false
readings.
Generally,
with
the
exception
of
a
low-impedance
circuit,
the
use
of
a
lead
wire
should
be
avoided.
If
a
lead
wire
other
than
the
probe
or
shielded
wire
is
used,
make
the
lead
as
short
as
pos
sible.
When
using
a
shielded
wire
in
a
circuit
having
high
impedance,
attention
should
be
p'aid
to
the
loading
effects
of
the
sum
of
the
input
capacitance
of
the
oscilloscope
and
the
dis
tributed
capacitance
of
the
probe
or
shielded
wire
on
the
signal
source.
The
input
terminal
of
the
oscilloscope
has
a
capacitance
of
about
30pF
in
parallel
with
lMf2.
If
the
effect
of
this
parallel
capacitance
on
the
high
impedance
signal
source
cannot
be
ignored,
the
use
of
the
low
capacitance
xlo
probe
is
recommended.
(7)
Low-capacitance
probe
To
avoid
the
ill
effects
by
direct
connection,
use
a
low-capacitance
probe
(xiO)
whenever
pos
sible.
When
this
probe
is
used,
input
impedance
is
lOMH,
22pF,
making
it
possible
to
reduce
the
loading
effects
upon
the
signal
source
to
a
great
extent.
However,
when
the
probe
is
used
at
xio,
the
input
signal
is
attenuated
to
1/10.
This
must
be
taken
into
account
in
all
measurements.
(8)
Ground
Connection
When
using
a
probe,
connect
to
a
ground
point
close
to
the
signal
source
and
use
the
probe
ground
wire.
Triggering
on
waveforms
The
most
important
factor
in
operating
to
lock
and
display
waveforms
properly
before
measuring
them
with
the
oscilloscope.
(9)
How
to
provide
synchronization
o
Select
the
position
of
the
SOURCE
switch
@
according
to
the
connector
where
sync
signal
is
supplied.
Also
select
the
position
of
the
MODE
13
selection
(lO)
Select
the
sweep
mode
by
the
MODE
selector
.
When
no
input
signal
is
applied
or
the
trigger
level
is
not
correct,
set
the
selector
to
NORM
to
remove
waveforms
on
the
screen.
The
triggered
sweep
circuit
of
this
instrument
stops
functioning
if
a
trigger
pulse
is
not
produced
as
a
sweep
starting
pulse.
It
is,
therefore,
necessary
to
select
this
sweep
ac
cording
to
purpose
desired.
Generally,
for
waveforms
which
have
a
frequency
of
20Hz
or
more
and
are
not
complex,
use
AUTO
triggering.
At
AUTO
triggering,
the
sweep
circuit
is
auto
matically
placed
in
the
free-run
state
when
the
aforememtioned
trigger
pulse
is
not
produced
and
a
horizontal
trace
is
displayed
irrespective
of
sweep
time
set
by
the
knob
@
.
Next,
set
the
synchronizing
polarity
to
either
PUSH
(+)
or
PULL
(-)
by
the
LEVEL
knob
and
pro
vide
synchronization
by
turning
the
knob
to
stabilize
the
waveform.
*
Explanation
of
the
synchronizing
polarity
level.
PUSH
(+)
SLOPE
^
The
polarities
synchronize
with
each
other
in
the
solid
line
parts.
PULL
(-)
slope
*
Explanation
of
the
synchronizing
level.
-
+
When
the
slope
is
positive
(+)
When
the
slope
is
negative
(-)
14
(10)
How
to
observe
waveforms
If
(i)
VOLTS/DIV
is
set
to
0.5V,
then
the
amplitude
is
0.5
x
6
=
3.0V
If
TIME/DIV
is
set
to
0.5ms,
then
the
period
is
0.5
x
4
=
0.002S
So
the
frequency
Is
1/0.002=500H2
1
6
d
1
4
div
Example
of
measurement
of
voltage,
period
and
frequency
Caution:
Keep
the
VARIABLE
knob
@
at
the
CAL
position
and
the
SWP
VAL
knob
@
at
the
CAL
position.
At
the
CAL
position,
the
waveform
is
calibrated
by
the
specified
value
of
each
range.
(11)
.Magnification
of
part
of
waveform
Turn
the
POSITION
(PULL
x10
MAG)
knob
@
to
locate
the
1
division
of
trace
to
the
horizontal
graticule
center
and
pull
the
knob.
That
part
will
be
magnified
to
cover
the
full
length
of
the
graticule.
Any
1
division
of
the
sweep
can
be
displayed
as
a
10
division
trace
by
use
of
the
knob
.
(12)
Operation
of
X-Y
Set
the
knobs
as
follows:
(n)
TIME/DIV
:
set
to
X-Y
EXT.TRIG
or
[X]
IN:
feed
X-axis
signal
(horizontal-
axis
signal)
as
input.
I.NPUT
feed
Y-axis
signal
(vertical-
axis
signal
)
as
input.
By
this
setting,
the
Y-axis
sensitivity
operates
by
means
of
VOLTS/DIV
and
the
X-axis
sensitivity
by
[X]
VAR.
However,
the
position
in
the
Y
direction
(vertical
direction)
operates
by
means
of
it
POSITION
and
the
position
in
the
X
direction
(horizontal
direc
tion)
operates
by
means
of
t
POSITION.
lo
3.
User
Adjustments
RV1035
ASTIG
Left
View
Remove
top
Cover
0
Right
View
0
0
0
000
00^
□
"
n
RVlll
DC
BAL
RV143
GAIN
The
following
adjustments
should
be
made
by
means
of
a
screw
driver.
(1)
TRACE
ROTATION
(Trace
slope)
Adjust
the
TRACE
ROTATION
(T)
on
the
front
panel
when
slight
tilting
of
the
trace
is
caused
by
the
effect
of
external
magnetic
fields.
Make
certain
that
tilting
of
the
traces
is
not
caused
by
the
effect
of
unusually
strong
external
magnetic
fields
due
to
the
position
of
the
oscilloscope.
(2)
ASTIG
ADJUSTMENT
Set
the
knob
TIME/DIV
(1^
to
X-Y
observing
the
spot
on
the
center
of
the
screen.
RV1035
astigmatism
adjustment
provides
optimum
spot
roundness
when
used
in
conjunction
with
FOCUS
(3)
and
POWER/INTENSITY
0
control.
Little
readjustment
of
this
control
is
required
after
initial
adjustment.
(3)
Adjust
Volts/Division
Balance
(STEP
ATT
BAL)
a.
Position
the
trace
to
the
center
horizontal
line
with
the
vertical
POSITION
control.
b.
Check
-
Change
the
V/DIV
switch
from
5mV
to
lOmV.
Trace
should
not
move
more
than
0.1
division.
16
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