Hitachi V-212 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
one
year
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
one
year
period
providing
the
product
is
brought
to
our
Authorized
Service
Station.
Hitachi
Denshi,
Ltd.
further
warrants
to
the
original
purchaser
that
upon
expiration
of
the
one
year
free
service
warranty
period
and
within
two
years
from
the
original
date
of
purchase.
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
optional
materials
which
are
defective
in
either
workmanship
or
material
under
normal
and
proper
use.
After
the
expiration
of
the
one
year
free
service
period
and
during
the
addi
tional
period
covered
by
two
years
parts
warranty,
a
reasonable
charge
will
be
made
for
labor
or
service
performed.
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
MODEL
V-212/211
1.
2.
3.
4.
5.
6.
7.
10.
11.
12.
1
Features
1
Accessories
2
Precautions
.
.
7
Controls
and
connectors
How
to
obtain
the
displays
17
Method
for
connecting
signals
,
20
Measuring
procedure
28
Adjustments
Maintenance
^
.
29
Specifications
External
view
35
Schematic
diagrams
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
detergent.
Refrain
from
using
thinner,
benzine,
alcohol
or
other
chemicals.
o
For
safety
operation,
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
FEATURES
The
Hitachi
V-212
[V-211]
*
is
a
portable-type,
advanced-
class
oscilloscope
with
a
bandwidth
of
DC
to
20
MHz
designed
with
the
emphasis
on
operability
and
portability
and
has
follow
ing
features.
♦[
]
:
Specifications
of
V-211
(1)
Wide
bandwidth:
The
instrument
has
a
bandwidth
from
DC
to
20
MHz.
(2)
High
sensitivity:
Sensitivity
is
1
mV/div
(3)
Large
6"
screen:
Employment
of
a
large
square
CRT
makes
waveforms
easier
to
observe.
(6)
TY
synchronization:
Employment
of
a
new
TV
sync
separator
circuit
allows
the
instrument
to
observe
TV
signals
stably.
2.
ACCESSORIES
□
This
instrument
is
shipped
with
the
following
standard
accessories.
2
[1]
Probes
(AT-lOAJ
1.5)
1
AC
power
supply
cord
1
Operation
manual
(4)
Internal
graticule:
Employment
of
an
internal
graticule
CRT
permits
waveforms
observation
to
be
made
without
parallax
error.
(5)
ALT
TRIG
Even
an
observation
of
two
waveforms
of
different
frequen
cies,
the
waveform
of
the
each
cannel
is
stably
triggered.
(V-212
only)
3.
PRECAUTIONS
Precautions
to
be
observed
to
lengthen
the
service
life
of
this
instrument.
Installation
site
*
Avoid
installing
instrument
in
an
extremely
hot
or
cold
place.
o
Avoid
placing
this
instrument
in
a
place
exposed
to
sun
light
for
a
long
period
of
time,
in
a
closed
car
in
mid
summer,
or
near
a
room
heating
device
such
as
a
stove,
o
The
operating
maximum
ambient
temperature
is
-h40°C.
*
Do
not
use
instrument
that
has
been
left
outdoors
on
a
cold
winter
day.
The
operating
ambient
temperature
is
0°C
or
more.
/■9
Avoid
moving
the
instrument
rapidly
from
a
hot
place
to
a
cold
place
or
vice
versa,
or
condensation
may
form
inside
of
the
instrument.
Keep
the
instrument
away
from
damp
air,
water,
and
dust.
Unexpected
trouble
may
be
caused
when
the
instrument
is
placed
in
a
damp
or
dusty
place.
The
operating
ambient
humidity
is
35—85%.
Since
an
accidental
intrusion
of
liquid
may
also
cause
troubles,
do
not
place
a
liquid-filled
containers
such
as
a
vase
on
the
oscilloscope.
Do
not
place
the
instrument
in
a
place
where
vibration
is
strong.
Avoid
using
the
instrument
at
a
place
vibrating
violently.
Since
the
oscilloscope
is
a
precision
instrument,
excessively
strong
vibrations
may
cause
damage.
Do
not
place
the
instrument
near
a
magnet
or
magnetic
body.
An
oscilloscope
is
an
equipment
using
electron
beam.
Therefore,
do
not
bring
a
magnet
close
to
the
instrument
or
do
not
use
the
instrument
near
an
equipment
generating
strong
magnetic
force.
Handling
*
Do
not put
a
heavy
objects
on
the
oscilloscope.
*
Do
not
block
the
ventilation
holes.
*
Do
not
apply
a
heavy
shock
to
the
oscilloscope.
*
Do
not
insert
a
wire,
pin,
etc.
through
the
ventilation
hole.
*
Do
not
drag
the
set,
leaving
the
probe
attached
to
it.
7
■7
T'
77///
/
>V
/7
/
/
When
not
in
use
When
not
in
use,
put
the
dust-proof
cover
on
the
instrument
and
store
it
with
care.
♦
Do
not
leave
a
hot
soldering
iron
on
the
cabinet
or
the
screen.
*
Do
not
try
to
turn
the
instrument
upside
down.
Otherwise,
knobs
may
be
broken.
*
Do
not
use
the
instrument
upright,
leaving
BNC
cable
connected
to
EXT
BLANKING
terminal
on
the
rear
panel.
Otherwise,
the
cable
may
be
damaged.
When
operation
is
faulty
Recheck
the
operating
procedure
and
if
problem
persists,
contact
a
nearly
service
station
or
agent.
Care
and
repair
*
Removal
of
stain
from
the
case.
o
When
the
outside
of
the
case
is
stained,
remove
the
stain
by
fi
rst
wiping
it
lightly
with
a
cloth
moistened
with
neutral
washing
agent
and
then
wipe
the
surface
with
a
dry
cloth.
*
Never
use
strongly
volatile
agent
such
as
benzine
and
thinner.
o
When
the
panel
surface
is
stained,
remove
the
stain
in
similar
way
with
a
clean,
soft
cloth.
When
heavy
stains
are
present,
fi
rst
remove
the
stains
by
wiping
the
surface
lightly
with
a
locth
moistened
with
diluted
neutral
wash
ing
agent
or
with
alcohol
and
then
wipe
thoroughly
with
a
dry
cloth.
o
When
dust
has
accumulated
on
the
inside,
remove
it
by
using
dry
brush,
or
by
using
the
exhaust
of
a
compressor
or
a
vacuum
cleaner.
By
a
SERVICE
PERSONNEL.
NOTE:
When
opening
the
case,
pull
out
the
power
supply
plug
beforehand
without
fail.
When
cleaning
the
inside,
insure
beforehand
that
no
electricity
remains
in
the
condensers
of
the
power
supply
circuit.
"NOT
FOR
AN
OPERATOR"
*
Cleaning
of
CRT
Dirty
surface
of
CRT
screen
tends
to
cause
measuring
errors.
The
screen
surface
becames
accessible
when
the
bezel
is
re
moved.
Remove
the
stains
on
CRT
and
filter
by
using
a
clean
and
soft
cloth,
paying
attention
not
to
impair
them.
When
the
stain
is
extremely
heavy,
wash
them
with
neutral
washing
agent
and
then
leave
them
stand
until
the
moisture
is
removed
naturally.
o
If
the
screen
is
installed
while
it
is
moistened,
water
rings
may
be
formed
and
the
waveform
may
be
blurred
to
become
hard
to
observe.
Pay
attention
not
to
leave
finger
prints
on
it.
CRT
Filter
Operation
precautions
*
Check
the
line
voltage.
The
operating
voltage
range
of
this
oscilloscope
is
as
shown
below.
Check
the
hne
voltage
without
fail
before
turning
on
the
power
switch.
Rating
Line
Voltage
(50/60Hz)
ACIOOV
AC
90V-
llOV
AC120V
AC
108V-
132
V
AC220V
AC198V-242V
AC240V
AC216V
-
264V
Nominal
volts
±5%
at
400Hz.
In
the
case
of
normal
shipment,
the
voltage
selector
will
be
set
convenient
for
user.
When
it
is
intended
to
use
the
oscilloscope
on
another
voltage
rating,
voltage
selector
can
be
turned.
(Rated
voltages
are
indicated
on
the
rear
panel
of
the
oscilloscope.)
*
Use
only
specified
fuses.
In
order
to
protect
the
circuit
against
overcurrent,
a
fuse
of
2A
(for
ACIOOV
or
AC120V)
or
lA
(for
AC220V
or
AC
240V)
is
used
on
the
primary
side
of
power
supply.
When
this
fuse
is
blows
out,
check
thoroughly
the
cause,
repair
any
faulty
point
present,
and
then
replace
with
a
specified
fuse.
Do
not
try
to
use
the
fuse
other
than
the
specified
ones.
Otherwise,
fault
may
be
caused
or
danger
may
be
invited.
(Particularly,
do
not
use
a
fuse
different
from
the
specified
one
in
current
capacity
and
in
length.)
The
standards
of
the
fuses
are
as
follows.
Dimensions
(Diameter
x
length)mm
Type
number
2A
6.350x31.8
MF61NM250V
2A
AC
lA
6.350x
31.8
MF61NM250V
lA
AC
*
Do
not
increase
the
brightness
too
much.
Do
not
increase
the
brightness
of
the
spot
and
trace
too
much.
Your
eyes
may
be
strained
and
the
fluorescent
sur
face
of
CRT
may
be
burnt.
*
Do
not
apply
an
excessive
voltage.
The
input
withstand
voltage
of
each
input
connector
and
probe
input
is
as
follows.
Never
apply
a
voltage
higher
than
specified.
INPUT
direct,
300V
(DC
+
AC
peak
at
1
kHz)
When
probe
is
used
400V
(DC
+
AC
peak
at
1
kHz)
EXT
TRIG
INPUT
EXT
BLANKING
Calibration
Interval
30dV(r)C+ACpeak)
30V
(DC
+
AC
peak)
To
maintain
instrument
accuracy,
perform
the
calibration
of
the
V-212[V-211]
at
least
every
1000
hours
of
opera
tion,
or
every
six
months
if
used
infrequently.
4.
CONTROLS
AND
CONNECTORS
□
(1)
Power
supply
and
CRT
Operating
voltage
and
fuse
This
model
can
be
operated
from
either
a
100-volt,
a
120-volt,
a
220-volt
or
a
240-volt
nominal
line
voltage
source.
The
line
Voltage
Selector
on
the
rear
panel,
converts
the
instrument
from
one
operating
range
to
another.
In
addi
tion,
this
Selector
changes
the
primary
connections
of
the
power
transformer
to
allow
selection
of
one
of
four
regu
lating
ranges.
The
Selector
also
includes
the
line
fuse.
Use
the
following
procedure
to
convert
this
instrument
be
tween
nominal
line
voltage
or
regulating
ranges.
1.
Disconnect
the
instrument
from
the
power
source.
2.
To
convert
from
100-volts
nominal
to
220-volts
nominal
line
voltage
or
vice
versa,
pull
out
the
Volt
age
Selector
switch,
and
plug
it
back
into
the
desired
holes.
Change
power-cord
set
to
match
the
power-
source
outlet.
3.
Before
applying
power
to
the
instrument,
check
the
voltage
indicator
tabs
on
the
Selector.
(D
(4)®
(D
OSCILLOSCOPE
V
Fig.
4-1
V-212
Front
View
(D®
(T)
(D
mm
®
I
osc^iQsccm
t
W
(3)®
®
®®
®@
®
Fig.
4-2
V-211
Front
View
Fig.
4-3
V-212/V-211
Rear
View
®
POWER
switch
The
POWER
is
set
on
at
the
pushed-in
position,
and
set
off
at
the
released
position
@
POWER
lamp
This
lamp
goes
on
in
red
when
the
power
supply
is
in
ON
state.
@
FOCUS
control
After
obtaining
an
appropriate
brightness
by
operating
INTENSITY,
adjust
FOCUS
until
the
display
is
clearest.
0
TRACE
ROTATION
control
Used
to
aline
the
trace
of
CRT
with
the
horizontal
graticule.
0
INTENSITY
control
This
knob
adjusts
the
brightness.
Brightness
is
increased
by
rotating
INTENSITY
clockwise.
0
VOLTAGE
SELECTOR
Used
to
select
the
power
sources.
0
AC
inlet
This
is
inlet
for
detachable
AC
power
cord.
(2)
Controls
of
vertical
deflection
system
0
CHI
INPUT
connector
BNC
connector
for
vertical
axis
input.
The
signal
input
to
this
terminal
becomes
the
X-axis
[Y-axis]
signal
when
the
instrument
is
used
as
an
X-Y
oscilloscope.
0
CH2
INPUT
connector
(V-212
only)
The
same
as
CHI,
but
when
the
instrument
is
used
as
an
X-Y
oscilloscope,
the
signal
input
to
this
terminal
becomes
the
Y-axis
signal.
@@
Input
coupling
switches
(AC-GND-DC)
The
switches
used
to
select
the
coupling
system
between
the
input
signal
and
vertical
axis
amplifier.
AC
At
this
setting
the
signal
is
connected
through
a
capacitor.
The
DC
component
of
the
input
signal
is
cut
off
and
only
the
AC
component
is
dis
played.
GND
At
this
setting
the
input
to
the
vertical
axis
ampli
fi
er
is
grounded.
DC
At
this
setting
the
input
signal
is
directly
con
nected
to
the
vertical
axis
amplifier
and
displayed
unchanged,
including
the
DC
component.
10
@
VOLTS/DIV
select
switches
A
step
attenuator
which
selects
vertical
deflection
fac
tor.
Set
it
to
an
easily
observable
range
corresponding
to
the
amplitude
of
the
input
signal.
Multiply
the
reading
by
10
when
the
10:1
probe
is
used
in
combination
with
the
instrument.
@@VAR
controls
PULL
x5
GAIN
Fine
tuning
device
used
to
vary
the
vertical
deflection
sensitivity
continuously.
Attenuation
of
less
than
1/2.5
is
obtained
when
this
device
is
rotated
in
the
reverse
direction
of
the
arrow
to
the
full.
This
control
is
used
when
comparing
waveforms
or
when
measuring
the
rise
time
of
a
square
wave
in
2-channel
observation.
Normally
this
control
is
left
rotated
in
the
direction
of
the
arrow
to
the
full.
When
the
knob
is
at
PUT
T,
position
(pulled
up
state)
the
gain
of
the
vertical
axis
is
magnified
5
times
and
the
maximum
sensitivity
becomes
ImV/DIV.
(l^
POSITION
controls
This
knob
is
used
to
adjust
the
position
of
the
vertical
axis.
The
display
rises
with
a
clockwise
rotation
of
this
knob
and
falls
with
a
counterclockwise
rotation.
(©
POSITION
control
(V-212
only)
PULL
INVERT
The
same
as
CHI,
but
when
the
knob
is
at
PULL
posi
tion
(pulled
up
state),
the
polarity
of
the
input
signal
applied
to
CH2
will
be
inverted.
This
control
is
conveniently
used
in
the
comparison
of
two
waveforms
having
different
polarity
or
in
the
obser
vation
of
the
waveform
of
the
difference
between
signals
of
CHI
and
CH2
using
ADD
facility.
(U)
MODE
select
switch
(V-212
only)
This
switch
is
used
to
select
the
operation
mode
of
the
vertical
deflection
system.
CHI
Only
the
signal
that
has
been
applied
to
CHI
appears
on
the
screen.
CH2
Only
the
signal
that
has
been
applied
to
CH2
ap
pears
on
the
screen.
ALT
Signals
applied
respectively
to
CHI
and
CH2
appears
on
the
screen
alternatively
at
each
sweep.
This
setting
is
used
when
the
sweep
time
is
short
in
2-channel
observation.
CHOP
At
this
setting
the
input
signals
applied
to
CHI
and
CH2
are
switched
at
about
250
kHz
indepen
dent
of
the
sweep
and
at
the
same
time
appear
on
the
screen.
This
setting
is
used
when
the
sweep
time
is
long
in
2-channel
observation.
11
ADD
The
algebraic
sum
of
the
input
signals
applied
respectively
to
CHI
and
CH2
appears
on
the
screen.
@
CHI
OUTPUT
connector
Output
connector
providing
a
sample
of
the
signal
applied
to
the
CHI
connector.
adjustment
controls
BAL
These
are
used
for
the
attenuator
balance
adjustment.
See
8.
ADJUSTMENTS
. .
.
for
the
details.
(3)
Controls
of
Horizontal
deflection
system
@
TIME/DIV
select
switch
Sweep
time
ranges
are
available
in
19
steps
from
0.2
/rs/div
to
0.2s/div.
X-Y
This
position
is
used
when
using
the
instrument
as
an
X-Y
oscilloscope.
V-212:
In
this
position
the
X
(horizontal)
signal
is
con
nected
to
the
input
of
CHI;
the
Y
(vertical)
signal
is
applied
to
the
input
of
CH2
and
has
a
deflection
range
from
less
than
one
millivolt
to
5
volts/div
at
a
reduced
band-width
of
500
kHz.
V-211:
X(horizontal)
direction
signal
is
input
to
EXT
TRIG
or
®
IN
@
and
Y
(vertical)
direc-
SWP
VARiable
control
tion
signal
to
V-INPUT
.
The
vertical
deflec
tion
sensitivity
at
this
time
is
read
on
VOLTS/
DIV
and
horizontal
axis
sensitivity
is
about
200
mV/div.
Vertical
position
is
set
by
V-POSITION
and
horizontal
position
by
H-POSITION
.
control
j
This
control
works
as
CAL
and
the
sweep
time
is
cali
brated
to
the
value
indicated
by
TIME/DIV.
TIME/DIV
of
sweep
can
be
varied
continuously
when
shaft
is
out
of
CAL
position.
Then
the
control
is
rotated
in
the
direction
of
arrow
to
the
full,
the
CAL
state
is
produced
and
the
sweep
time
is
calibrated
to
the
value
indicated
by
TIME/DIV.
Counterclockwise
rotation
to
the
full
delays
the
sweep
by
2.5
times
or
more.
POSITION
PULL
xlO
MAG
control
This
knob
is
used
to
move
the
display
in
horizontal
direc
tions.
It
is
indispensable
in
the
measurement
of
the
time
of
waveform.
Display
is
moved
toward
right
when
the
knob
is
rotated
clockwise
and
toward
left
with
counterclockwise
rotation.
12
Sweep
is
magnified
10
times
by
pulling
out
knob
of
POSITION.
In
this
case
the
sweep
time
is
1/10
of
the
value
indicated
by
TIME/DIV.
Bring
the
position
of
the
waveform
desired
to
be
magnified
observed
to
the
center
of
the
scale
by
operating
^
POSITION
of
the
horizon
tal
axis.
Next,
switch
xlO
MAG
switch
to
PULL
(pulled
out
state).
Then
the
waveform
placed
at
the
center
is
magnified
in
right
and
left
directions.
The
sweep
time
in
this
case
is
10
times
the
sweep
speed
obtained
by
TIME/DIV,
in
other
words,
the
reading
is
I/IO
of
the
sweep
time
indicated.
(4)
Synchronization
system
(||)
SOURCE
select
switch
(INT-LINE-EXT)
This
switch
is
used
to
select
the
triggering
signal
source.
INT
The
input
signal
applied
to
CHI
or
CH2
becomes
the
triggering
signal.
LINE
This
setting
is
used
when
observing
a
signal
with
power
supply
hne
frequency.
EXT
External
triggering
signal
applied
to
TRIG
IN
PUT
becomes
the
triggering
signal.
This
setting
is
used
when
triggering
with
a
special
Independently
of
the
vertical
axis
signal.
EXT
X
This
select
X
input
when
the
instrument
is
used
as
a
X-Y
oscilloscope.
(V-211
only)
Magnified
waveform
INT
TRIG
select
switch
(¥-212
only)
This
switch
is
used
to
select
the
internal
triggering
signal
source.
CHI
CH2
VERT
MODE
The
input
signal
applied
to
CHI
becomes
the
triggering
signal.
The
input
signal
applied
to
CH2
becomes
the
triggering
signal.
For
observing
two
waveforms,
the
sync
signal
13
changes
alternately
corresponding
to
the
signals
on
CHI
and
CH2
to
trigger
the
signal.
EXT
TRIG
or
IN
connector
Input
terminal
for
use
for
external
triggering
signal.
The
signal
input
to
this
terminal
becomes
the
X-axis
signal
when
the
instrument
is
used
as
an
X-Y
oscillo
scope.
(V-211
only)
Trigger
LEVEL
control
PULL
(-)
SLOPE
This
knob
is
used
to
decide
at
which
portion
of
the
wave
form
should
the
sweep
be
started
by
setting
trigger
level.
This
knob
is
also
enabled
to
switch
SLOPE.
Depressed
position
(normal
state)
is
for
©SLOPE
and
PULL
position
(state
in
which
the
knob
is
protruding)
is
for
©SLOPE.
Explanation
of
trigger
polarity
SLOPE
Push
at
time
of
©SLOPE
Pull
at
time
of
©
SLOPE
Explanation
of
trigger
LEVEL
At
the
time
of©
SLOPE
At
the
time
of©
SLOPE
Trigger
MODE
select
switch
AUTO
The
instrument
is
brought
into
automatically
triggering
sweep
in
which
sweep
is
always
con
ducted.
In
the
presence
of
triggered
signal,
normal
triggered
sweep
is
obtained
and
the
waveform
stands
still.
In
the
case
of
no
signal
or
out
of
triggering,
sweep
line
will
appear
automatically.
This
setting
is
convenient
in
usual
cases.
NORM
Triggered
sweep
is
obtained
and
sweep
is
con
ducted
only
when
triggering
is
effected.
No
sweep
line
will
appear
in
the
case
of
no
signal
or
out
of
synchronization.
Use
this
mode
when
effecting
synchronization
to
a
very
low
fre-
14
(5)
quency
signal
(25
Hz
or
less).
TV(V)
This
setting
is
used
when
observing
the
entire
vertical
picture
of
television
signal.
TV(H)
This
setting
is
used
when
observing
the
entire
horizontal
picture
of
television
signal.
(NOTE)
Both
TV-V
and
TV-H
synchronize
only
when
the
synchronizing
singal
is
negative.
Miscellaneous
EXT
BLANKING
INPUT
connector
Input
terminal
for
brightness
modulation.
It
is
of
the
DC
coupling.
The
brightness
is
reduced
with
a
positive
signal
and
increases
with
a
negative
signal.
GAL
0.5
V
tip
Output
terminal
of
calibration
square
wave
of
about
1
kHz
and
0.5V.
It
has
a
tip
terminal.
It
is
used
to
cali
brate
the
probe
combination.
I
Grounding
terminal
Earth
terminal
of
the
oscilloscope.
5.
HOW
TO
OBTAIN
THE
DISPLAYS
Before
turning
ON
the
POWER
switch,
insure
the
power
supply
voltage
is
within
the
range
of
108-132V
for
AC
120V
set,
198-242V
for
AC220V
set,
and
216-264V
for
AC
240V
set.
Insert
the
plug
of
the
power
cord
on
the
rear
panel
into
the
wall
outlet
and
set
the
controls
as
follows.
POWER
®
OFF
INTENSITY
@
Counterclockwise
to
the
full
FOCUS@
Midrange
AC-GND-DC
(n)
GND
11
POSITION
Midrange
(the
knob
is
in
the
de
1
r
pressed)
MODE
@
CHI
Trigger
MODE
(g)
AUTO
Trigger
SOURCE
(^
INT
INT
TRIG
(V-212
only)
CHI
TIME/DIV(2|)
@
0.5
ms/div
POSITION
(g)
Midrange
Set
all
the
levers
of
the
switches
to
the
upper
side.
After
ending
all
the
setting
mentioned
above,
turn
ON
the
POWER
and,
15
second
later,
rotate
the
INTEN
knob
clock
wise.
Then
the
display
will
appear.
If
the
observation
is
to
be
started
immediately,
set
the
FOCUS
control
at
a
point
where
the
display
is
sharpest.
15
If
the
instrument
is
not
used
with
the
power
supply
turned
on
rotate
the
INTENsity
counterclockwise
to
reduce
the
brightness
and
also
blur
the
FOCUS.
NOTE
For
usual
observation,
leave
the
following
non-calibrating
function
section
set
to
"GAL"
position.
VARIABLE
Rotate
in
the
direction
of
arrow.
In
this
case
the
VOLTS/DIV
is
calibrated
to
its
indicating
value.
SWF
VAR
Leave
the
knob
in
depressed
state.
In
this
case
the
TIME/DIV
is
calibrated
to
its
indicating
value.
Align
the
base
line
with
the
horizontal
scale
line
at
the
center
of
the
screen
by
operating
CHI
POSITION.
In
some
cases
the
base
line
may
be
oblique
to
the
scale
slightly
by
the
effect
of
earth
magnetism.
In
this
case,
bring
the
base
line
until
it
Ues
on
the
horizontal
scale
line
at
the
center
of
the
screen
by
properly
adjusting
the
semi-fixed
variable
resistor
TRACE
ROTATION
on
the
front
panel.
GENERAL
MEASUREMENT
(1)
In
the
case
of
observing
a
single
waveform.
Use
CHI
or
CH2
when
not
observing
the
phase
difference
between
two
waveforms
or
when
engaging
in
a
operation
other
than
X-Y
operation.
Make
the
following
settings
when
using
CHI.
MODE
select
switch
CHI
Trigger
MODE
switch
@
AUTO
Trigger
SOURCE
(25)
INT
INT
TRIG
(V-212
only)
(g)
CH1
Under
these
settings
almost
all
the
repetitive
signals
of
about
25
Hz
or
more
applied
to
CH
1
can
be
synchro
nized
and
observed
by
adjusting
trigger
LEVEL.
Since
the
MODE
of
horizontal
axis
is
at
AUTO
position,
the
base
line
appears
even
when
no
signal
is
present
or
when
input
coupling
switch
is
at
GND
position.
This
means
that
the
DC
voltage
can
be
measured.
The
following
switching
is
needed
when
observing
low
frequency
signals
of
about
25
Hz
or
less.
Trigger
MODE
NORM
Synchronization
can
be
effected
by
operating
LEVER
knob
under
this
setting.
16
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