oscilloscope traning manual
TRANSCRIPT
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odel V 1050
OS I LLOS OPE
.
OPER TION rYl NU L
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Contents
1.
Features .
2. composi t ion
.
3. Precaut ions .
4.
How
to
produce
the
b r i g h t
l i n e
.
5.
Method
for
Connect ing Signa ls
.
1)
When
us
ing
a
probe
.
2)
When a
di r ec t connect
.
3)
Caution for us ing the measured s igna l
as an
ex te rna l
t r i g g e r s igna l
.
6. Measuring Procedure .
1) DC
vol tage measurement .
2)
C vol tage measurement .
3)
Per iod measurement .
4) Measurement o f t ime d i f fe rence
, .
5)
Measurement
o f
r i s e
f a l l )
t ime .
6) Measurement
o f s ing le - sho t s igna l .
7) Tr igger o f
complexed
waveform
.
8)
Phase s h i f t between
two
s igna l s .
9) Measurement
by X-Y opera t ion .
10)
How to
use
TV exc lus ive synchroniza t ion .
11) Opera t ing procedure
o f
delayed sweep
. , .
12) How
to
use
TRIG VIEW .
7. Panel
Descr ipt ions .
1) Power Supply
and
CRT
.
2) Ver t ica l
def lec t ion
3)
Horizon ta l
def leq t ion
.
4)
A
t r igger ing
.
5)
B
t r igger ing
6) Miscellaneous
.
8. Spec i f ica t ions
.
9. Users
Adjustments
.
10.
Schematic
Diagram .
11. Panel
Controls
1
2
5
8
8
9
10
12
12
13
14
14
15
15
16
18
20
24
25
25
26
28
30
33
33
35
39
40
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I
Features
Hitach i
Model V-1050 osc i l loscope i s a
p o r ta b le - ty p e , advanced-class osc i l loscope with
a bandwidth
of D
to 100
MHz
Designed by put t ing
sp ec i a l emphasis
on
o p erab i l i t y and
ruggedness,
t h i s
osc i l loscope
has
the
fol lowing
fea tures :
(1)
Wide bandwidth:
The instrument has a
bandwidth
from D
to
100 MHz
(2) High
sens i t i v i ty :
Sens i t iv i ty i s 500 ~ V / d i v
(3)
Large
6
screen:
Employment of a la rge square RT makes wave
forms
e a s i e r
to
observe.
(4)
In t e rn a l g ra t i cu l e :
Employment of i n t e rn a l g ra t i cu l e RT permits
waveforms observa t ion to be made
without
p ara l l ax e r ro r .
(5)
TV
synchroniza t ion :
Employment of
a new TV sync /separa tor
c i rcu i t
al lows
instrument to
observe
TV
s ignals
s t ab ly .
(6)
Delayed sweep.
A port ion of the s ig n a l can
be
magnif ied
before observa t ion .
(7)
Trigger view:
Displays the
se l ec t ed
in t e rn a l o r e x te rn a l
t r igge r
s ignal .
I f an e x te rn a l t r igge r
s ig n a l
i s selected ,
you
can co r re l a t e the
t ime
between the t r i g g e r
s ignal and
input
s ig n a l s .
(8)Auto focusing
Focusing
sh i f t i s
automat ica l ly
c o r re c te d .
2 omposition
Composition
of
Model V-1050 osc i l loscope i s
as fol lows.
(1) Model V-1050 osc i l loscope
uni t
(2)
Probe (AT-10AE
1 .5 2
(3)
Fuse
(2A
for 100V
and
l20V se t
or lA for 220 and
240V
se t
(4)
Dust
proof cover
(5)
Sc.rew dr iver
(6)
Power
supply cord
(7) Operat ion
ManuaL
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3 recautions
Precaut ions to
be observed to
lengthen
the
serv ice
l i f e
o f t h i s in s t rumen t .
Avoide
i n s t a l l i ng ins trument in an
extremely hot
or
co ld p lace .
o Avoid plac ing t h i s ins trument in a place
exposed to sunl ight for a long per iod o f t ime,
in
a
c losed ca r in midsummer, o r
near a room
heat ing dev ice
such as a
s tove .
o The opera t ing
maximum
ambient temperature i s
50C.
Do
not use
ins trument tha t has
been
l e f t outdoors
on
a
cold winte r
day.
The
opera t ing
ambient tem
pera ture i s OC or more.
Avoid
moving
the
ins trument
r a p i d l y from
a hot
p lace to a co ld p lace o f vice
ve r sa , or
condensa
t i on may form
on
ins ide o f the
in s t rumen t .
Keep t he
ins trument away
from damp a i r ,
wate r ,
and
dus t .
Unexpected
t r oub l e
may
be c u ~ e d when
the ins trument
i s
p laced in a
damp or
dusty
place .
The opera t ing ambient humidi ty i s 35-85 . Since
an
acc identa l i n s t ru s ion
of wa te r may also cause
t roubles ,
.do not p lace
a wat e r - f i l l ed
conta ine r s
such
as a vase
on
the
osc i l loscope .
Do not p lace
the
ins trument
in a place where
vibra t ion
i s s t rong.
Avoid us ing
the
ins trument a t
a p lace v ib ra t i ng v io l en t ly . Since the o s c i l l o -
scope i s a
pr e c i s i on
in s t rumen t , excess ive ly
s t rong
v ib ra t i ons
may
cause
damage.
Do not place
the
ins trument near a magnet or
magnet ic
body.
n
osc i l loscope i s
an equipment
us ing elec t ron beam.
There fo re ,
do not br i ng a
magnet c lose
to
the
ins trument
o r do not use the
instrument near an equipment gene ra t ing
s t rong
magnet ic force .
Do
not
put a
heavy
objec ts
on
the osc i l loscope .
Do not
block
the
ven t i l l a t i on holes .
Do
not
apply a heavy shock
to
the osc i l loscope .
Do
not
i n s e r t
a
wire , p in ,
e t c .
through the
ven t i l l a t i on ho le .
Do not drag the
se t ,
l eav ing
the
probe a t t ached
to it
Do not
l eave
a
hot
solde r ing i ron
on
the cabine t
o r
the screen.
Do
not
t r y
to
turn
t he
ins trument
ups ide
down.
Otherwise,
knobs
may
be
broken.
Do not use the
ins trument
upr i gh t , l eav ing BNC
C
-'
..
C
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cable connected to
EXT BLANKING,
G TE
OUT
PUT
t e rmina l s on the r ea r pane l .
Otherwise
the
cable
may
be
damaged.
Recheck
t he
ope ra t i ng procedure and
if
problem
pe r s i s t s
contac t
a
nea r ly
serv ice
s t a t i on
o r
agent .
Removal of s t a i n
from the
case .
o When the outs ide of the
case i s
s t a i ned
remove
t he s t a i n
by
f i r s t
wiping it l i gh t l y
with
a
c l o t h mois tened
with
neu t r a l washing
agent
and then wipe t he su r f ace with
a dry
c lo th .
o When
t he pane l su r f ace
i s s t a i ned
remove t he
s t a i n in s imi l a r way
with
a clean s o f t c lo th .
When heavy s t a i n s are present
f i r s t
remove
t he s t a i n s by wiping the su r f ace l i gh t l y with
a
c l o t h moistened with
d i lu t ed
neu t r a l washing
agent and then wipe tho rough ly with
a dry c lo th .
o When dust has accumulated
on
the in s i de
--,:-
remove it by us ing
a
dry
brush or by us ing t he
exhaust of
a
compressor
or a
vacuum
c leaner .
NOTE: When opening the case
disconnec t t he
power
supply plug beforehand
without
f a i l .
When cleaning the ins ide insure beforehand
t ha t
no e l e c t r i c i t y
remains
in the condensers
of the
power supply c i rcu i t .
Clean ing of CRT
Dir ty su r f ace
of CRT screen
t ends
to cause measur
ing er ro r s .
Remove
t he s t a i n s on
CRT
and f i l t e r by us ing
a
c lean and
so f t
c l o t h
paying a t t en t ion
not to
impair them.
When the s t a i n i s extremely heavy
wash
them with
neu t r a l washing agent and then l eave them s t and
u n t i l t he mois ture
i s remov-ed na tu ra l ly .
o
I f
the
screen
i s
i n s t a l l e d
while
it
i s
moistened
water r ings
may
be
formed and t he
waveform may
be
blur red to become hard to
observe .
Pay
a t t en t ion
not
to
l eave
f inger
pr i n t s on it
Check the
l i ne
vol tage .
The ope ra t i ng vo l t age
range
of
t h i s os c i l l o s cope
i s
as
shown below.
Check
the l i ne
vo l t age without
f a i l before turn ing on the power swi tch .
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Rating
Line
Voltage 50/60Hz)
AC100V
AC
90V - llOV
AC120V AC108V -
l32V
AC220V AC198V -
242V
AC240V AC2l6V -
264V
Nominal
vo l t s
a t 400Hz.
In
the
case of normal shipment, the vol tage
s e l ec t o r wi l l be s e t convenient
for
user
up.
When t i s
in tended
to
use
the
osci l loscope on
vol t ages
othe r
ra t ing , vol tage se lec tor can be
turned. Rated
v o l t ~ g e s
are indica ted on the
r ea r panel of the osc i l l o scope . )
*
Use
only
spec i f i ed
fuses .
4
In
order
to
protec t the c i rcu i t
aga ins t
over -
current , a A
make
use of ACIOOV or AC120V)
o r
lA make use
of AC220V o r AC240V)
i s used on
the
pr imary s ide of the power supply . When t h i s
fuse i s
below
out , check
thoroughly
the
cause ,
repa i r
any faul ty point
present ,
and
then
r eplace
with
a. spec i f i ed fuse . Do not
t r y
to
use
the
fuse other than
the
spec i f i ed ones. Otherwise,
fau l t may be
caused
or
danger may be i nv i t ed .
Par t i cu la r ly ,
do not use a fuse
di f fe rent
from
the spec i f i ed
one in cur rent capac i ty and in
l eng th . ) The s tandards i f the fuses are as
fo l lows.
Shape
JIS type
name
Diameter x
length)mm
A
6 . 3 5 ~ x
31.
8
MF61NM250V
A
AC
(
lA
6 . 3 5 ~
x
31.8
MF61NM250V
lA AC
*
Do not inc rease the br ightness too much.
Do
not inc rease the br ightness of the spo t and
t race
too
much.
Your
eyes may be
s t ra ined
and the
f luorescent sur face of
CRT may be
burnt .
* Do no apply an excess ive
vol t age .
The input withs tand
vol tage
of each in put con
nec tor and probe input
i s
as fo l lows . Never apply
a
voltav,e
h igher
than
speci f ied .
INPUT di rec t
250V DC
+ AC peak
a t
1 kHz)
When
probe i s
used 500V DC +
AC
peak a t 1 kHz)
EXT TRIG INPUT 250V DC +
AC
peak)
EXT BLANKING 20V DC + AC peak)
I Calibration
Interval
1
To
mainta in jns trument accuracy,
perform the
ca l i b r a t i on
of the
V-I050
a t
l e a s t
every
1000
hours of
ope ra t ion ,
or
every
s i x
months
i f
used
inf requent ly .
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< )
4 ow to produce the bright lin
Unless handled er roneous ly , t h i s i ns t rument
wi l l
never become f au l t y by ord ina ry ope ra t i on .
Before
t u rn ing
ON the
POWER
switch,
i n su re
the power supply vol tage i s within
the
range
of
l08V
132V for
AC
120V s e t , 198V - 242V for
AC
220V se t , and 216V - 264V
for AC
240V s e t .
Refer to the i nd i ca t i on on the
r ea r
pane l of the
ins t rument
for o ther
vol tages .
Connect the
plug of t he
power
cord
on the
r ea r
panel
i n to
the power supply wal l
socket
and
s e t t he
knobs
as fo l lows .
POWER/INTENSITY
IOFFI
FOC TS
Midrange
AC-GND-DC
GND
HPOSITION
Midrange
V.MODE
CHI
BW LIMIT 20MHz
Ful l bandwidth
but ton out )
D1SPLAY
A
POSITION
Midrange
A
TRIG
MODE AUTO
A TRIG
COUPING AC
A TRIG
SOURCE
CHI
A
TIME/DIV
O.5ms/DIV
B TIME/DIV
Arb i t r a ry
VAR
HOLD
OFF
B TRIG MODE
MIN
f u l l
c . c .w. )
AUTO
Set
a l l
the
l evers of
the swi tches e i t he r to
the l e f t s ide or to
t he
upper s i de .
After ending a l l t he s e t t i ngs
mentioned above
tu rn
ON
the
POWER.
and
15
seconds
l a t e r ,
r o t a t e
the
INTENSITY
knob clockwise. Then the sweep
br i gh t l i ne w i l l
appear .
I f observat ion i s to be
s t a r t e d
immediate ly
se t t he FOC TS knob a.t a point where the br i gh t
l i ne
i s
sharpes t .
I f
the ins t rument
i s
not
used
wi th the
power
supply
turned
on
r o t a t e INTENSITY counter
clockwise
to
reduce
the
br ightness
and
a l so
b lu r
the FOCUS.
INOTEI
For
usual observa t ion , leave the
fo l lowing
non-ca l ibra t ing funct ion sec t ion se t to CAL
pos i t i on .
VARIABLE
Rota te in
the
d i r ec t i on of arrow.
In
t h i s case the
VOLTS/DIY
i s
ca l ib ra t ed to
i t s
i nd i ca t i ng
value .
PULL
SWP
VAR Push in
the
knob or r o t a t e in the
d i rec t ion
of arrow. In t h i s
case
t he TIME/DIV i s ca l ib ra t ed to
i t s
i nd i ca t i ng value .
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Align the
br ight l i ne with
the hor izonta l
sca le l i ne a t the
cente r
of
the
screen by opera t
ing CHI POSITION. In some cases the br ight l ine
may
be
oblique
to the sca le s l i gh t l y
by
the
e f f ec t of ear th
magnetism.
In t h i s case,
br ing
the br ight
l i ne un t j l t
l i e s on
the hor izonta l
sca le l ine a t the
cente r
of the screen
by
prope r ly
adjus t ing
the semi- f ixed va r i ab l e
r es i s to r TRACE ROTATION on the
f ront
panel .
- General measurement -
1) In the
case of observing
a s ingle
waveform
6
Use CHI
or
CH when not observing
the phase
di f ference between two waveforms
or
when engag-
ing
in a
opera t ion o the r than
X-Y
opera t ion .
Make
the
fol lowing s e t t i ngs when using CHI.
MODE Switch
of
Vert ica l
Axis
CHI
MODE Switch
of TRIG AUTO
TRIG SOURCE CHI
AC-GND-DC AC or DC
Under
these s e t t i ngs almost a l l the r epe t i t i ve
s ignals
of
about 30
Hz
or
more
appl i ed to
CHI
can be
t r i gge red and observed by adjus t ing
A TRIG LEVEL.
When,
the
range
of
TIME/DIV
i s
between
2mS/DIV and 20ns/DIV) Sjnce the MODE
of
hor izonta l
axi s
i s a t AUTO pos i t i on
the br igh t
l i ne appears even when
no
s ignal i s present or
when
AC-GND-DC switch
j s
a t
GNP pos i t i on .
This
means tha t
the measurement
of DC
vol tage can be
measured. The fol lowing swi tch ing i s needed
when
observing
low f requency s igna l s of about
30
Hz
or
l ess .
A TRIG MODE
A TRIG COUPLING
NORM
DC
Trigger ing can be e f f ec t ed
by
opera t ing LEVEL
knob under
t h i s s e t t i ng . When using only CH2
use the
instrument
a f t e r making the
fol lowing
s e t t i ngs .
MODE Switch
of
Vert ica l Axis
A TRIG SOURCE
CH
CH
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(2)
..
When observing two
waveforms
Observat ion of two waveforms can
be made eas i ly
by
s e t t i ng the MODE
switch
of ve r t i c a l
axis
to
ALT
or
CHOP. When observing
two waveforms
of
high r epe t i t i on f requencies se t the
MODE
switch
to
ALT and,
in
the
case
of
low
f requencies
se t
t to CHOP.
Normally, ALT and
CHOP are recom-
mended by
se l ec t ion
of
TIME/DIV.
ALT;
0.2ms/DIV
CHOP;
0.5ms/DIV
20ns/DIV
0.5s/DIV
When measur ing
the
phase d i f f e r ence
measure
a f t e r
ef fec t ing t r igger ing
with l eading
phase
s ignal .
(3)
When observing t h r ee or
four
waveforms.
This instrument can be observed
the t r i gger ing
s igna l s CH3
as
A TRIG, CH4
as
B TRIG)
a t
depressed pos i t ion of TRIG VIEW .
The t ab l e shows the r e la t ion between s e t t i ng
of
ve r t i c a l mode
and
t r a c e s on
CRT.
V
MODE
No.
of display
CHI CHl,
CH3
CH2 CH2,
CH3
ALT
CHI, CH2, CH3, CH4
CHOP CHI, CH2, CH3,
CH4
ADD CHI + CH2, CH3,
CH4
The
disp laying
pos i t ion of
CH3
A
TRIG)
i s
loca ted near the 100 's
sub-graduat ion and
poss ib le to adjus t by A TRIG LEVEL
knob.
CH4 i s
f ixed
a t O 's sub-graduat ion .
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4) When observing waveform
with
X-Y
8
Set
the MODE switch of v er t i ca l axis to CH2
X-Y) and
DISPLAY switch to X-Y. Then
t he
ins trument works as an X-Y osc i l loscope .
Each input
i s
appl i ed to the
ins trument
as
fo l lows.
X-axis s igna l
hor izonta l ax is s igna l )
CHl INPUT
Y-axis s igna l
v er t i ca l
axi s s i gna l )
CH2 INPUT
In
t h i s case leave
t he
hor izonta l
axi s
magni
f i c a t io n switch PULL x 1 MAG
i nner shaf t knob)
a t
depressed
pos i t i on , and the
AC-GND-DC
of
X-axis
CH1)
to
AC,
a lso
TRIG
VIEW
and
W
LIMIT
20MHz are undepressed pos i t i on but ton out ) .
5 Method for onnecting Signals
The f i r s t s tep of
measurement
i s i n t roduce the
s igna l des i red to measure t o the osc i l loscope
proper ly .
Do
t
with utmost
care .
1) When using a probe
Use
t he a t t ached
probe,
AT-10AE
1.5,
when
measuring a high f requency wave with high
accuracy.
I t
should
be
noted,
however, t h a t s ince the
input s igna l
i s
a t tenua ted by
t h i s
probe
to
1/10 before t
i s
input
to
the osc i l loscope the
use
of the
probe
i s
disadvantageous
for
low
s igna ls ,
and
tha t a t
t he
same t ime the measur
ing
range i s extended by t h a t
amount
for
high
s igna ls .
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Connection
of
ear th
l ead
wire
A
good
example
A bad example
For
b e t t e r
measurement
i t i s required to
use
an
ear th
at tachment
in s tandard
accessory of AT
10AE
1.5 probe.
o
Multiply the reading of
VOLTS/DIY
by 10.
For
example, i f
the VOLTS/DIY
i s
50
mY/DIY,
then
read the waveform as
50mV/DIV x 10
500mV/DIV
o To avoid
measurement
e r ro r , put the
probe
in the
fol lowing
c o r re c t io n s t a t e
and check
t before
measurement without f a i l . Connect
the
t i p of the
probe to
the
output
te rmina l
C L 0.5V
of
1 kHz
ca l ib ra t i o n square
wave vol tage
and
an
ear th
at tachment
to
the GND te rmina l . The
disp lay
should
have
f l a t tops . Any dis to r t ion in the
presen ta t ion
in
caused by
incorrect
probe
com-
pensa t ion .
I f overshoot or undershoot i s presen t ,
tu rn the screwdr iver adjustment in the probe for
a
f l a t - top presen tat ion .
Ca) Correct
b)
Overshoot
c)
Undershoot
2) When a di rec t connect ion
When connect ing a s ig n a l di rec t ly
to
the o sc i l
loscope not us ing the a t tached
probe
AT IOAE
1.5
10:1) ,
pay a t t en t io n
to the
fol lowing
p o in t s in order
to minimize
the
measurement
e r ro r .
o When performing observa t ion using a bare lead
wire, no t ro u b le occurs of the c i rcu i t to be mea
sured i s of low impedance
and
high
l evel .
However, note tha t , in most cases ,
measurement
er ro r may
be
caused by s t a t i c s t r ay
coupling
with
other c i rcu i t and power l ine .
This measurement e r ro r cannot be
i gnored
even
9
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in low frequency
region.
In genera l , t i s
safe
to
avoid measuring with
non-shielded
connect ing
wire . When using a
sh ie ld ing
wire connect
one end
of
t he
sh ie ld
to
t he ear th t e rminal of t he osc i l loscope and
t he
other
end
to the
grounding
of
the
c i r cu i t
to
be
measured. I t i s des i rab le to
use a
coaxia l
cable with NC
type
connector .
o The
fo l lowing
caut ions must be observed when
performing a
wide hand
measurement.
I t i s
neces
sary to t e rminate with
t he
ch arac t e r i s t i c
imped
ance
of
t he cable when
measuring
a rap id r i s in g
waveform or a
high frequency wave.
Especia l ly when
using a long
cable , t he
absence
of a
t e rminat ing
r e s i s t o r wi l l necessar i ly lead
to a measurement e r ro r derived
from
r inging
phenomenon.
Some
measur ing c i r c u i t s requi re
a
t e rminat ing
r es i s to r equal
t o the
ch arac t e r i s t i c
impedance of
t he
cable a lso on t he measurement
t e rminal s ide .
NC
type t e rminat ing
r e s i s t o r 50
i s conveni
ent ly used for t h i s purpose.
o
In
order to
perform
measurement
with
t he
measur
ing
c i r cu i t
put in
proper
opera t ing s ta te t i s
sometimes necessary to
t e rminate the
cable with
10
an
impedance which
corresponds
to t he
c i r cu i t
to
be
measured.
o
The
s t ra y
capaci ty
of t he sh ie ld
wire
must be
taken
i n to account when
performing measurement
with a long
sh i e l d
wire .
Since
t he
sh ie ld
wire
normal ly
in
use has
a
capaci ty
of
about
100 pF
per
meter ,
i t s e f fe c t
on
the
c i r cu i t
to
be
measured
cannot be ignored.
Use a probe to minimize t he e f fe c t ion t he c i rcu i t .
o When t he l ength
of
t he
sh ie ld wire used
or when
the length
of
the
non-terminated cable reaches
1/4
wave l ength or i t s mul t ip les within the band
of V-l050
type
1/4 wave l ength
i s
about 0.5 meter
when using a coaxia l cable
a t 100 MHz),
o s c i l l a
t ion may be caused near 5 mY/DIY range.
This i s
caused
by
t he reasonance between the ex t e r na l l y
connected high-Q
inductance
and t he
input
capaci ty and can be avoided
by reducing
the
Q
Connect t he
cable or sh ie ld
wire
to the input
connector by
way of a s e r i a l l y connected 100
to 1 re s i s to r , or
perform
measurement a t other
VOLTS/DIY
range.
3)
Caution
for
using
t he
measured
s igna l
as
an
externa l t r ig g e r s igna l
When using t he measured s igna l connected to the
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INPUT and EXT TRIG connectors as
an e x te rn a l
t r igge r s ig n a l , use a d iv id e r so t h a t the
both
connectors
are
not connected di rec t ly . Other
wise, the measuring waveform may be dis to r ted
or osc i l l a ted .
6
easuring Procedure
The
f i r s t th ings to do are as fol lows.
o Adjusts the br igh tness and FOCUS in condi t ion
for easy
read
out .
o Display the waveform as la rge as poss ib le to
minimize the
read
er ro r .
o
Check
the capac i ty correc t ion when
using
a probe.
(Refer to
Paragraph
(1) When using a probe of
Sect ion 5. Method for connect ing s ig n a l
fo r
the
method
for
correct ing capaci ty . )
(1)
DC
vol tage
measurement
Set
AC-GND-DC swi tch to GND and
decide the
zero
l ev e l
proper ly .
Set
VOLTS/DIY appropr ia te ly and se t AC-GND-DC
to
DC
Since
the
b r ig h t l i n e sh i f t s here by
t h e amount
of DC vol tage ,
the DC
vol tage
of
the
s ig n a l can be
obta ined
by mult ip ly ing the sh i f t
width by the ind ica ted value of VOLTS/DIY.
When VOLTS/DIY i s 50 mY/DIY, then 50 mY/DIY x
4.2 = 2l0mV
(However, i f the
probe AT-lO AE
1.5
(10:1)
i s in use , the
t ru e value of
the
s ignal becomes
10 t imes
t h e value, i t wil l be
50
mY/DIY
x
4.2
x
10
=
2 . lV. )
11
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1 0 ~ ~ - + - r Y - + - ~ h c l - + - L
O ~ ~ - + - r ~ + - r - ~ ~
DC voltage
Zero level
(reference
l ine)
2) AC
vol tage measurement
12
The same
as
paragraph 6 1) ,
DC
vo l tage mea
surement , but
here those
i s
no
need
o f
match
ing the
ze ro l eve l
with the sca le l i ne . Move
the zero l eve l a t wi l l to a posi t ion easy to
observe.
In the drawing as
fo l lows,
VOLTSjDIV
i s
IVjDIV,
IVjDIV x 5 = 5 Vp-p [50 Vp-p a t using the probe
AT-IO'AE 1. 5 10: 1)
1.
When magnify ing and
observ
ing a
small-ampli tude
s igna l
superinposing
as
inc reases ,
se t AC-GND-DC swi tch
to
AC. The DC
vol tage i s cut of f and AC vo l tage can be
observed by
inc reas ing
sens i t i v i ty .
100
90
ft\
f - ----
-
-
- -
-
i f
- 'Lt
IJ
\- -
- -
- - - r
U
>
0
- -
--\
1
0
0
- -- - -
-
-
- - - -
-
(3) Period measurement
This wi l l
be
exp la ined
tak ing the drawing a t
fol lows
as
an example
100
90
- - - -
- - -
- - - -
- -
111
i l l
/ \
11\
J
ilL
I \ I
\
-
- -
/ \
I \
J
I
\
\
\
j
10
0
-- - - - - -
-
Time A Time B
- - - -
-
One per iod cover s the
t ime
A and
t ime B,
which
are
sepa ra ted
from each
othe r
by 2.0
DIV
on the
CRT.
When
the
sweep
t ime
i s ImsjDIV,
the pe r iod
i s
given
by
1 msjDIV x 2.0
2.0
ms
2.0 x
10-3
s
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\
(4)
Accordingly,
the
f requency
i s
1 / 2 .0
x
10-
3
)
=
500
Hz
(However, when the
knob
MAG x 10 i s a t pul led
out
posi t ion ,
TIME/DIV must be converted
to
1/10 s ince the sweep i s magnif ied . )
Measurement of t ime di f fe rence
Trigger ing s i gna l
source
"SOURCE" i s s e l ec t ed
as
of fe r ing re fe rence s igna l when measuring the
t ime di f fe rence between
two
s igna l s . Assume
tha t pulse
t r a i n s
as shown in a) . Then
(b)
shows
the
case
when
CHI i s taken
as
the t r i g -
ger ing s i gna l
source and c) the
case
where
CH
i s t aken.
:
CHI
I I
1Pu u u L
I
, ,
caz,
-
I l a)
'
CH
I ,
CHI
, - + - - - - - -
,
,
I
,
I
I
--
"
Time
difference
CHZ
b)
CHZ
(c)
This
means t ha t
CHI
i s
used as
the t r i gger ing
signal
when i nves t iga t ing the l ength of
t ime
by which the s igna l of CH i s
delayed
from the
s i gna l of CHI. CH i s used in the reversed
case.
In other
words, the
s igna l l eading in
phase i s
se l ec t ed
as
the t r i gger ing
s i gna l
source.
I f
t h i s
process i s
reversed ,
the por t ion to be
measured may sometimes
not
appear
on
the screen .
Thereaf te r , equa l i ze
the
ampl i tudes
of
the
two
s igna l s
appear ing
on the screen or superimpose
one
another .
Read the t ime di f fe rence
by
the i n t e rva l
between 50% ampl i tude poin t s of the
two
s ignals .
Sometimes
the
super imposing
method i s
more
con
venient
from the
point of view of procedure.
rn.eft
difference Equalize
amplitudes
J.:::: V y VAR
Equal
amplitude
measuring method Superposition measuring method
13
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{ C au t i ons
)
Since
the
pulsed
wave conta ins many
h igh
f requency wave
components higher
harmonics)
depending on i t s width or
per iod ,
pay
t he
same
a t t e n t io n as given to high f requency s igna ls
when
handling
it.
Accordingly, use
a
probe
or coaxia l
cable and shor t en
the ea r t h
l ead wire as much as
poss ib le .
(5) Measurement of r i s e fa l l ) t ime
14
To measure
t he
r i s e t ime
pay
a t ten t ion not only
to t he above mentioned i tems but a lso
to
mea
surement
e r ro r .
The fo l lowing re l a t io n s h ip
ex i s t s
between
the
r i s e
t ime Trx of
t he waveform to be measured,
t he
r i s e t ime Trs of osc i l loscope ,
and t he
r i s e t ime Tro di sp layed on the screen.
When
t he
r i s e t ime
of
the
pulse
going to
be
measured i s
su f f i c i en t ly longer
than t he
r i s e
t ime of
the
osc i l loscope 3.5ns in our case) ,
t he
ef fec t
of the r i s e t ime of the osc i l loscope
on
the
measurement can
be
neglec ted .
However,
i f both are
c lose to
each other , measurement
e r ro r may
be
caused.
The
t r ue r i s e t ime i s
given by
Trx = Tro2 -
Trs2
Moreover,
in
genera l ,
in a c i r cu i t
f ree
from /
waveform d i s to r t io n such overshoot and sag, (
the
fo l lowing
re l a t io n s h ip
i s
es t ab l i shed
between frequency band
and
r i s e
t ime.
fc
x
tr
=
0.35
where,
fc
Frequency
band
(Hz)
t r
Rise t ime s )
The r i s e t ime
and f a l l
t ime
are
determined by
t he
t ime elapsed between t he 10 to 90 values
of pul se
width .
(6)
Measurement
of
s ing le -shot s igna l
Single sweep i s convenient ly used in the measure
ment
and
photography of
s ing le -shot
s igna l ,
wave
form of remarkably non-uniform
re p e t i t io n
(such
as impulse waves, sound
waves,
switch
noise
waves).
Fi r s t se t A TRIG MO E on
t he
f ron t
panel
to
NORM
and t he
e f fe c t synchroniza t ion by
using a
s igna l o r
r ep e t i t i v e
waveform
of
about
the same
leve l
and
by ro ta t in g LEVEL.
('
Next, se t A TRIG MO E
to
SINGLE
and
depress
RESET but ton
to
i nsure
tha t sweep
i s
made on and
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')
~ ; - ; .
only one t ime. Then remove the ve r t i c a l axis
input s i gna l (by, for example, s e t t i ng AC-GND
DC swi tch
to
GND depress SINGLE RESET and
insure
t ha t
READY LAMP goes
on.
When
apply
t he
input s i gna l ,
sweep
i s made for
one t ime and
READY LAMP
goes out. Since
sweep
i s a l so made a t
no s i gna l
time depending
on
the
level , do
not
r o t a t e
LEVEL once SINGLE
RESET
i s completed .
(7)
Trigger ing
of complexed
waveform
In t he
case
shown in the Fig. (a ) below where
waveforms gr ea t l y
d i f fe ren t
in ampl i tude a l t e r -
nate ,
the waveform
i s doubled
i f the t r igger
l eve l i s
not
s e t
proper ly .
In the
case where
the
t r igger
l eve l
i s
s e l ec t ed
as Y
l i ne two
waveforms, one
s t a r t i ng
with A and advancing to
B, C D E, F and t he o the r
s t a r t i ng wi th
E and advancing to F, G H I .....
w i l l
appear
a l t e r n a t e l y on
the screen . They
w i l l
be
doubled
as
shown in
Fig.
(b) , for which no
t r i gger ing
can be t aken.
In
such
a case , r o t a t e LEVEL clockwise un t i l
the
t r i g g e r
l eve l
comes
to
Y l i ne . Then
the
waveform
on
t he screen
becomes
the one
i s
shown in
Fig.
(c)
fol low
which s t a r t
wi th B
B \ H N f \
Y
Trigger
level
A 7 C i c ; d } i ~
Y se t t ing
l ine
Ca
Signal waveform
(b)
When
the t r igger
set t ing level is Y
(c)
When
the
t r igger
se t t ing level
is y
Trigger ing of complexed waveform
and
advances
to C E, F and
which
a l lows
synchroniza t ion .
(8)
Phase sh i f t between
two s i gna l s
To
measure
a
phase sh i f t between two s i gna l s of
the same
f requency,
the dual
t r ace
d i sp l ay
system can be
u t i l i z e d up
to the upper
l im i t
frequency of the ampl i f i e r .
F i r s t ,
pos i t ion
both s i gna l s on t he cent
er l i ne
of the s ca l e , e .g . j u s t 4 div , as
shown
in the
fo l lowing
f igure
by means
of the
VARIABLE
and
hor izonta l pos i t ioning
knobs.
Next,
s e t the
dis tance
where the center of the
waveform of the base channel in te r sec t s wi th
t ha t
of
the sca le to
8 div
hor i zon t a l l y .
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16
CHI
Bas
e)
CH2
~
~
1.
\
\.
V
I
/
\1 \
l
/
- - - - - >
Phase di ffe
~ n c e
0.7 div
8dlv (360 )
------ )
As shown in the
above
f igure , se t 1
cycle ,
360
to
8 div .
360
Then, 8div = 45 /d iv .
Accordingly, t he
phase
di f fe rence
in
the above
example
can be ca l cu l a t ed as fo l lows:
Horizontal
dis tance on
the
screen:0 .7 div
Phase
di f fe rence = 45/DIV x
0.7
div = 31.5
I f
t he por t ion of the
phase di f fe rence i s much
smal l er , use t he MAGNIFIER a t the xlO pos i t ion
in t he above
se t t i n g . At
t h i s
t ime, 360
i s
di sp layed
in 8 div
xlO.
360
Then, 8 divxlO = 4.5/DIV (0 .2 div=0.9)
9) Measurement
by X-Y
opera t ion
The phase s h i f t between two
s igna ls
of the same
f requency can al so be measured
using a
Lissa jou s
f igure
by X-Y
opera t ion .
A s ine wave input
i s
appl i ed
to the
audio
c i r cu i t being te s ted . The
same
s ine
wave input
i s appl i ed to t he
v er t i ca l input of
t he
o sc i l
loscope,
and the
output of
the
t e s t e d c i r cu i t
i s
appl i ed
to
the hor izonta l i nput of
the
o s c i l
loscope. The
amount
of phase
di f fe rence between
the
two
s i gna l s
can be
ca lcu la ted
from
the
re s u l t in g wave form.
1. Using
an
audio s i gna l genera tor
with a
pure
s inusoida l s igna l , apply a s ine wave t e s t
s igna l a t t he des i red t e s t f requency to
t he
audio network being te s ted .
2. Set
t he s igna l genera tor
output
for the
normal
opera t ing
l eve l of the
c i r cu i t
being te s ted .
I f des i red , t he c i r c u i t s output
may
be observed
on
t he
osc i l loscope . I f
t he t e s t
c i r cu i t
i s
over-dr iven , t he
s ine wave disp lay on
t he
o s c i l
loscope
i s cl ipped and t he s igna l
leve l
must be
reduced.
~ :
3.
Connect t he
Channel 2
probe
to the output of
the
t e s t c i r cu i t .
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4.
Set
the
DISPLAY to X Y
posi t ion .
5. Connect the Channel
1 INPUT
probe to the input
of the t e s t c i r c u i t . The inpu t and output t e s t
connect ions to the
ve r t i c a l
and hor izonta l
osc i l loscope
inputs
may be reversed .)
6. Adjust
the
Channel 1 and 2 gain cont ro l s
for
a
su i tab le viewing
s i ze .
7.
Some
t yp ica l
r e s u l t s are
shown
in
Fig . b ) . I f
the
two
s igna l s
are in phase,
the osc i l loscope
t r ace
i s a s t r a i gh t diagonal l ine. I f the ve r -
t i c a l
and
hor izonta l gains a re proper ly
adjus ted ,
t h i s
l ine i s
a t a
45
angle.
A
9 phase
sh i f t produces a
c i r cu la r
o s c i l l o -
scope pa t t e rn . Phase
sh i f t
of l e s s or more)
than 9 produces an e l l i p t i c a l osc i l loscope
pa t t e rn .
The amount of phase sh i f t
can be
ca lcu la t ed
from
the osc i l loscope t r ace
as
shown
in
Fig . a ) .
SINE
WHERE
B
A
PH SE
NGLE
Fig . a)
Phase sh i f t ca l cu l a t i on
/
O MPLITUDE
DISTORTION
MPLITUDE
DISTORTION
NO
PH SE
SHIFT
NO PH SE SHIFT
180
0
OUT OF PH SE
NO
MPLITUDE DISTORTION
PH SE SHIFT
0
MPLITUDE
DISTORTION
90
OUT O PH SE
PH SE
SHIFT
Flg. b) Typical phase measurement
osc i l loscope d i sp lays .
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10) How to use TV exc lus ive synchron iza t ion
Cl)
On
the
image waveform
of TV
si
ynchronizing
signal
pulse
SYNC
pulse
~ - - - - - - - - - - - - - - - - l V v e r t i c a l )
18
In the work
concerned
with TV, complexed s igna l s
con ta in ing
video
s igna l ,
blanking pedes ta l
s igna l ,
and synchronizing s ignal
a re of t en
measured.
However,
s ince
the
waveform
i s com-
plexed , a spec i a l
c i rcu i t i s
needed to e f f ec t a
s t ab l e t r i gge r ing with ve r t i c a l
waveform.
Dif fe rence in
the
c i r c u i t s
Exclus ive circuit for
conventional
osc i l lograph
l
X CIU
.
i V ~ circuit
for
this.
lDstrument
f-----.------ ----------. ~ r i n c i p l e drawing t. :
General
circl l l t i- iffiPl s y n c ~ r 0 1 1 1 z 1 n g
TV exclus ive synchronizing
Clrcult separator
c i rcu i t
- - - - - - - 4 - - - - - - - - - - - - - - - - - - -
Video
s lgnal
.
To
t r i gger
c i r cu i t
I
To t r i gge r c i r cu i t
~ ~
I
Hard
to synchronize
because video s ignal
is
applied
direc t ly
as tr igger
s ignal .
I
SLOPE
SYNC
Peak
Detec tor
I
Synchroniza t ion is more
I
Sta b l e t r i g g e r i n g ~
I
easi ly
effected
than
in obta ined, after d e ; ~ t e d
the
c i rcu i t shown
at the
peak
of
SYN
pulse
i l e f t because the
s igna l
then
the tr igger
l evel
in
I
integrated to
remove
feed back roap of opera-
I hlgh frequency com- t i ona l
ampli f ier
should
L-. . .L
I pOTIents be f ixed i t s SYN t ip.
(
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,)
Operat ion
To observe
ver t ical
signal
I
I
I I
I
A TRIG MODE:
TV
COUPLING:
TV V
LEVEL: PULL
TV -)
TIME:
O.lms/DIV -
O.2S/DIV
To observe
horizontal
signal
-
jm
mill
I
Will
IIlllll
---,
I
I
U
A TRIG MODE:
TV
COUPLING: TV H
LEVEL:
PULL
TV -)
TIME: 5 0 ~ s D I V -
20ns/DIV
Generaly , v ideo s i gna l o f TV has negat ive
synchroniz ing
s ignal . Use a t pu l l
out
pos i t ion which i s A TRIG LEVEL knob.
I f
the video s i gna l i s inver ted then A TRIG
LEVEL i s
depressed.
sign l
4 synchronizing
s ign l
Example
of
Example
of
-) synchroniging signal
+)
synchronizing signal
I f the
sync
and blanking pulses a re
pos i t ive se t
the swi tch
to
TV +).
19
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1 1 Operat ing procedure
of
delayed
sweep
Used to
magnify
and
observe
any
por t ion
of a
complexed
waveform in hor izonta l
d i r ec t i on .
There a re
two
kinds
o f
t ime delay
sweep;
one i s
AUTO
t ime delay
sweep continuous t ime
delay
sweep) and
the
other
TRIG
t ime delay
sweep t r i g -
ger ing t ime delay sweep).
These
are se lec ted by
MODE
switch of B
TRIG.
TRIG t ime
delay
sweep i s
fu r the r
c lass i f i ed in to
two, the INT
CHI,
CH2
in te rna l
t r i gge r ing
t ime
delay sweep) and EXT ex te rna l t r i gge r ing
t ime
delay
sweep). Usual ly,
t he instrument i s used
in
AUTO
mode.
Although
the .
AUTO t ime
delay
sweep
i s
easy to
opera te the
maximum
magnif ica t ion f ac to r
i s
l imi ted by delayed jitt r r o l l i ng ) t o a few
hundred t imes) . On the o the r hand, s ince
no
jitt r
i s
generated in TRIG t ime
delay sweep,
t h i s sweep
has
the fea ture
of
being enabled
to
inc rease
the magnif ica t ion fac tor . However, the
magnif ica t ion f ac to r
i s
l imi ted by
the br ightness
of CRT
to
a few thousand t imes) .
i)
At t ime of AUTO continuous t ime
delay sweep)
Effec t
t r i gge r ing
by
A
sweep and
se t
the
knobs
as fol lows.
20
B TRIG
MODE
DISPLAY
A TIME/DIV
B TIME/DIV
AUTO
INTEN
Choose
A TIME/DIV prope r ly
Set B TIME/DIV a t
a
more rapid
sweep t ime than the one s e t by
A
TIME/DIV
Then the high br ightness por t ion of
A sweep wil l
appear wi thout
f a i l
i f
not , adjus t
INTENSITY).
Rotate
DLY TIME
POSITION
knob the
cent e r
FINE
i s for f ine ad jus tmen t ) . The high br ightness
por t ion
wi l l move cont inuously. Bring t h i s high
br ightness por t ion
to the pos i t ion
des i red to
be
magnif ied, switch
DISPLAY
to
B. Then the
high
br ightness
por t ion
i s
magnif ied
to
occupy
the fu l l
a rea
of
the screen. The sweep t ime
i s
the indica ted
value
o f B TIME/DIV.
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)
,
:
/
i-----:::==========t-Bright
port on
A INTEN ALT B ~
~ )
A INTEN
ALT Blx-vl
~
D
At
t ime
of
TRIG TRIGGERING
t ime delay
sweep)
Effec t TRIGGERING
with
A
sweep
and set the knobs
as fo l lows.
B TRIG MODE
DISPLAY
A TIME/DIV
B TIME/DIV
TRIG (INT or EXT)
INTEN
Chose
A TIME/DIV proper ly .
Set
B TIME/DIV a t a more rap id
sweep
t ime than
the
one se t
by
A
TIME/DIV.
SLOPE Set SLOPE e i t he r to + or to -
Thereaf te r ,
ro ta te LEVEL. The high
br igh t -
ness
por t ion
o f
A sweep w i l l
appear wi thout
f a i l .
(This
s t a t e i s ca l l ed t he B- t r i gge r ed
s t a t e . Rotate DLY TIME POSITION knob.
The high br ightness
por t ion
w i l l move
con
t inuous ly .
Fur ther
ro t a t ion
w i l l br ing t h i s
por t ion
to the next
peak .
Therefore, br ing
t h i s
high
br i gh t port ion to
a
pos i t ion
des i red to be
magnif ied
and
then
se t DISPLAY
a t B. The high br ightness
por t ion
i s
magnif ied to occupy the fu l l area of the
screen . The sweep t ime for t h i s case
i s the
value
ind ica ted
by B
TIME/DIV.
The
gen
lock ing
i s
f ixed a t AC
A INTEN B X - Y
c _ - - - - ' ~
A INTEN B X - Y
- - - - - = ~ = - - - - ~ )
* The case in which SLOPE
is +
is
shown
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ALT
sweep
22
This ALT
sweep
i s displayed
A sweep
and
B
(delayed) sweep a l t e r na t i ve l y .
Belowing
f igures
are showing
when
CHI to
be
put t r i ang l e waveform
and CH
to
be
put
r ec tangula r waveform.
a)
Normal
observat ion
A INTEN ALT B X-Y
1)lI
(b) Prepared to magnify
A INTEN
LT
B X-Y
(lI J )
c)
(b) and in tens ive
display in a l te r -
na t ive ly sweep
A INTEN
ALT
B X-Y
1)i lJ)
CHI A sweep
CH
sweep
I 7 I - A A A . q , . . . . , . ~ < J 7 M CHI A sw p
H-t-+-+-+-+-++--t--I
CH sweep
CH
B sweep
(d) Only displayed
a t
in tens ive par t
A IETEN ALT B X-Y
lI J
)
When DISPLAY swi tch
i s
se t
the
ALT,
displaying
s ignal of B sweep
can
be
cont rol
the pos i t i on
The
range
of
lower three
Then depress
come
to
sc reen
in
t o t a l l y 8 t r aces
to observe.
These new 4
t r aces are
A
and
B sweep
of
CH3
and
CH4.
to ea s i l y
observe
by
TRACE
SEP.
posi t ion
be
s h i f t to
upper
and
divis ions
compere the
A
sweep.
the TRIG VIEW
switch,
4 t r aces
Note.
In case of ALT sweep, t r aces display a l t e r na t e l y
when low t ime-sweep opera t ion .
Use
the
range of O.2ms/DIV to highe r of TIME/DIV
switch.
f
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,
8
Magnif icat ion of TV
s igna l
Model
V-I050 has the fol lowing
th ree
methods
to
s e l e c t
and disp lay
the
magnif ied
image of
any
l i ne of TV
s ignal .
_____________ Me
t
hod
e t t i n g ~
A
TIME/DIV
Using externa l
t r igger
Cl
5
ms/DIY
2
ms/DIY)
A TRIG INPUT CH
Apply
V
synchronizing
s igna l
CH3)
A
TRIG
SOURCE
A TRIG
MODE
A TRIG
COUPLING
A TRIG
HOLD
OFF
A TRIG LEVEL
SLOPE)
B
TIME/DIV
B TRIG MODE
B
TRIG IN CH4)
B TRIG LEVEL
SLOPE)
DISPLAY
DLY
TIME MULT
EXT
AUTO
or
NORM
DC
Adjust
u n t i l the doubled
image
of f ie lds
1 and 2
disappear
Adjust corresponding
to V
syn
chroniz ing
s i gna l
lOIlS/DIV
EXT
TRIG NOTE 1
H synchronizing s igna l
Adjust u n t i l the
magnif ied
por
t ion in disp lay
After s e t t i ng with
INTEN the
pos i t ion to be magnif ied, se t
DISPLAY
to
B
Set
the des i red magnif ica t ion
pos i t ion
Using
externa l
t r i gge r 2)
Same
as
l e f t
Apply complexed video s igna l or
complexed synchronizing
s igna l
negat ive)
EXT
TV
TV-V
Same as l e f t
No
opera t ion
i s needed
Same
as
l e f t
INT NOTES
and 2)
Not
needed
No opera t ion i s
needed
Same
as
l e f t
Same
as
l e f t
NOTE
1)
AUTO i s a l so poss ib le . Although B TRIG needs no
in t h i s case, jitt r w i l l appear .
NOTE
2) The
separa ted H
synchroniz ing s igna l i s appl ied to
B synchroniz ing c i rcu i t .
Using
i n t e rna l
t r igger
Same
as
l e f t
Not
needed
CHI
or
CH
Same
as
l e f t
Same
as
l e f t
Same
as l e f t
No
opera t ion
i s needed
Same
as
l e f t
INT NOTES
and
2)
Not
needed
No
opera t ion
i s needed
Same
as l e f t
Same as l e f t
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(12)
24
With a conventional t ime delay sweep osc i l lo
scope
only the
method
of Using externa l t r i gge r
(1) can be appl i cable . ( In many cases t h i s
cannot
be app l i cab l e . )
In
Model
V-I050
the
methods
Using externa l
t r i gge r
(2)
and
Using
in te rna l
t r i gge r
can
be
prac t ized
besides the one
mentioned
above.
This
make Model
V-I050
very easy to
opera te .
How
to
use TRIG VIEW
Vert ica l MODE
ALT o r
CHOP
TRIG VIEW
PUSH
~ - j )
A TRIG
SOURCE EXT
A TRIG MODE
AUTO
B
TRIG
MODE EXT
(CH4
input )
Adjust A TRIG LEVEL. Then four synchronized
waves
can
be observed.
100
90
10
0
L
l l l L
L
l l l
L
\
1\
\
/1\
1\
\
\i \
\
\
r-- I- -
;
r-
f -
f
~ C H 3
Input
Signal
~ C H l
Input
Signal
~ C H
Input
Signa l
~ C H 4
Input
Signal
Rotate A TRIG LEVEL clockwise . The
CH3
input
s igna l on the sc reen
moves
downward t).
Rotate A TRIG LEVEL counterc lockwise .
Then
the
input s ignal moves
upward t). In
t h i s case,
the TRIGGERING point
i s
near the indica ted 100
sca le
of
the screen,
A TRIG LEVEL
must
be
adjus ted to br i ng
CH3 input s ignal near
100%'s
l i ne of the screen in orde r to ef fec t
t r i gge r ing .
I f it s h i f t s from the neighborhood i t s no t r i g
ger ing
wil l
be ef fec ted .
(NOTE)
In
some cases the
waveform
of t r i gge r s ignal
moves s l igh t ly
when opera t ing
POSITION knob of
CHI and CH2.
This
movement wi l l a l so be made
when
swi tch ing TRIG COUPLING from
AC
to DC
or
vice
versa .
f
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7
Panel escriptions
1)
Power Supply and CRT
Operat ing vol tage
and
fuse
This model can be opera ted from e i t he r
a
100
:
vo l t
a
120-vo l t
a
220-volt or
a
240-vol t
nominal l ine
vol tage source.
The
Line Voltage
Selec tor
assembly
on
the
r ea r
panel
conver ts the instrument from one
opera t ing
range
to
the other . In addi t ion
t h i s assembly changes the
primary
connect ions
of the
power t ransformer to
al low
se l ec t ion of
one of four regula t ing ranges.
a l so inc ludes the l i ne fuse .
The assembly
Use the
fol lowing
procedure to convert t h i s instrument between
nominal l i ne vol tages
or
regula t ing ranges.
1. Disconnect
the
instrument from the power source.
2.
To convert
from
lOO-volts nominal to 220-vol t s
nominal l i ne vol tage or v ice
ve r sa
pu l l
out
the
Voltage Selec tor switch turn it, and plug
it back in to
the remaining holes . Change the
l i ne - co r d power plug
to match
the power-source
receptac le .
,, ) 3. Before apply power to the ins t rument
check
t ha t
the i nd i ca t i ng t abs
on
the
r ea r
panel .
C )
POWER/INTENSITY
Turns the
power on or
off and
cont ro l s
the
br ightness
of the
CRT disp lay . Clockwise ad jus t
ment increases br ightness .
@
Pi lo t lamp
Lights when the instrument power i s on.
FOCUS
Provides adjustment for
optimum disp lay d e f i n i
t ion .
TR CE ROT TION
Correc ts
s l igh t
t i l t i n g
of
t r ace
caused
by
ex t e r na l magnet ic f ie lds .
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SCALE ILLUM
Controls g ra t i c u le i l lumina t ion . Useful to
i l lumina te
t he
g ra t i c u le
when
viewing
in
a dark
area , photographing.
TRACE FINDER
Compress
di sp lay wi th in
g ra t i c u le
area ,
indepen
dent ly of
d i sp lay por t ion
or appl i ed
s igna ls .
2) Ver t ica l def lec t ion
j)
CHI
OR
[ ] INPUT
This
i s
an input
plug
for use with the CHI
v er t i ca l
ampl i f ie r and X-axis hor izonta l ax is )
ampl i f ie r during X-Y opera t ion .
CH OR [Y INPUT
This i s
an input p lug
for use
with
t he
CH
v er t i ca l ampl i f ie r
and
Y-axis v er t i ca l axis )
ampl i f ie r
during
X-Y
opera t ion .
AC-GND-DC
26
Alterna t ing Current-Ground Switch-Direct
Current)
Switches t he
coupling
of the s igna l fed to the
v er t i ca l
axi s input .
DC coupling i s obta ined on
t he
DC pos i t ion . On
AC
pos i t ion , the d i re c t
cur ren t
component i s
blocked
by
a
capac i tor .
The
GND pos i t ion
grounds t he
input of the ampli
f i e r s and opens the input terminal
VOLTS/DIY
CHI or 0
sen s i t i v i t y switch)
This
i s
a knob for switching the sen s i t i v i t y of
the
input
s igna l
fed
to CHI. Switching
ac t ion
i s
accomplished in
ten s teps
from
5mV/DIV to
5V/
DIV. On X-Y opera t ion ,
t he
kaob funct ions to
change
t h e . sen s i t i v i t y of the X-axis .
CH2 or [Y sen s i t i v i t y
switch)
This
i s
a knob
for
swi tching
the
sen s i t i v i t y
of
the input
s i gna l
fed to CH2. Switching
act ion
i s
accomplished
in ten s teps from 5mV/DIV to 5V/
DIV. On X-Y
opera t ion ,
t he
knob
funct ions to
change
t he sen s i t i v i t y of t he Y-axis . To mea
sure by t he use
of
the ind ica ted vol t age s e n s i -
t i v i t y ,
be sure
to s e t each of the
VARIABLE
to
CAL pos i t ion by
t u rn ing
fu l ly clockwise . I f t he
s igna l
i s appl i ed to t he input t e rminal
by
t he
use of a
1/10
low
capaci t ance probe, t he va lues
are
ten t imes
t he
ind ica ted vol t age .
VARIABLE
This
i s
a v er t i ca l axis sen s i t i v i t y f ine adjus t -
ment
which
i s capable of a t tenua t ing to le ss
than
1/2 .5
by
ind ica t ion
of
each range
of VOLTS/
DIV. To measure a
vol t age
by
t he use of vol t age
sen s i t i v i t y ind ica ted
by
VOLTS/DIY,
t u rn the
c
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VARIABLE clockwise fu l ly to CAL.
@
POSITION, PULL
xlO
MAG
CHI # Ver t ica l pos i t ion
adjus tment )
With the knob turned
c lockwise ,
the waveforms
of CH-l move upward. When t he
knob
i s turned
counte rc lockwise , the waveforms move downward.
CH2 i t Ver t i c a l
pos i t ion
adjus tment )
Clockwise ro t a t ion wi l l move
pa t t e r n up, and
counterc lockwise
ro t a t ion wi l l move pa t t e r n
down
When the knob
i s
pul led ,
the
ve r t i c a l ax i s
s e ns i t i v i t y
a t each range
of
VOLTS/DIY i s
increased
by 10
t imes .
INote
I
1.
When
measuring
a t 5 mY/DIY 5
V/DIY range,
use
t he x l
(PULL xlO
MAG swi tch
i s
depressed
posi ion) . Otherwise
the
S /N
and frequency
bandwidth of
i ns t rument
wi l l
be decreased .
2.
In
case
of the observat ion of s i gna l s
in
the
h igh -sens i t i v i ty range of 5 ~ V
to
2mV/DIV and
in
the
CHOP MODE
t
i s sometimes d i f f i c u l t to
get
s t ab le
synchroniza t ion
due
to
noises
caused
by
the high ampl i f i ca t i on o f ve r t i c a l
ampl i f i e r .
In
t he se
cases :
a
. .
Put a
high l eve l of s i gna l s inchronized with
the
observ ing
s igna l i n to the A
EXT
TRIG
t e rminal or CH2 t e rminal (when
us ing
CHI) as
t r i gge r
s igna l
source .
b. In
case of obse rving low
frequency
s i gna l s
under
4kHz, s e l e c t
HF
REJ
of
A TRIG COUPLING.
c .
In
case of
obse rving
s i gna l s
over
4kHz,
s e l e c t ALT of ve r t i c a l MODE.
MODE
o CHI
Only
the input s i gna l
app l i ed t o
CHI i s
displayed.
o CH2, I
X-YI
Only the input s i gna l app l i ed t o CH2 i s
displayed.
o
ALT
CHI and
CH2 s i gna l s are d isp layed
a l t e r n a t e l y
on
consecut ive
sweeps.
o CHOP
CHI and CH2
s igna l s
are d isp layed
s imul taneous ly
by
swi tching
between
channel s
a t
about
250
kHz
r a t e .
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TR CE
SEP
B sweep
o f
the posi t ion
adjus tment knob
when
LT sweep
mode.
I N o t ~ e instrument has a sp ec i a l c o n t ro l system to
easy observe
a t
high
speed sweep range
when
DISPLAY
i s
se t
to
LT
o r B.
Therefore,
the
t r aces i s st ll
remained
when
decrease the
INTENSITY to minimum.
A
TIME/DIV Sweep speed se l ec t i o n )
The oute r
knob
c o n t ro l s the
A
Main)
sweep ra te ,
which has from
20 ns/DIV
to
0.5 s/DIV
se lec t s
23 f ixed sweep
speeds .
@ l B
TIME/DIV
The
inner
knob
contro l
the B
Delayed)-Sweep
ra te .
PULL
SWP
V R
Provides cont inuous adjus tment of
A sweep TIME/
DIV between ca l ib ra t ed p o s i t i o n s ,
when
the
inner shaf t
i s a t p u l l . Counterc lockwise ro ta
t ion to
the f u l l de lays the sweep by
2.5
t imes
or more.
Normally,
the
inner shaf t i s l e f t
depressed.
V R HOLD OFF
Increases
th e
t ime
between sweeps and
a ids t r i g
ger ing
on
complex
disp lays such as h ig h - f r e
quency s ig n a l , i r r e ~ u l r
s ig n a l and dig i t a l
words.
Rotate the
V R HOLD OFF s l i g h t l y to
obta in a
s t a b i l i z e d
t r igger ing .
Normally,
leave
t h i s knob ro t a t ed
to MIN
FINE
@
PULL xlO
M G
POSITION
This knob i s used to ad jus t pos i t ion
o f
the
disp lay hor izon tal ly . I t
i s
indespensable in
th e measurement of the t ime
o f
waveform.
Display i s
moved toward r igh t
when the knob i s
ro t a t ed
clockwise
and toward
l e f t with counter
clockwise ro ta t ion .
The
o u te r
shaf t
i s
for
course
adjus tment and inner shaf t for f ine
adjus tment .
A
and
B
sweep
are magnif ied 10
t imes by
pul l ing
out
FINE
knob i n n e r sh af t ) of
POSITION.
In
t h i s
case
the
sweep
t ime
i s
1/10
of the value
ind icated
by
TIME/DIV. Bring t h e
port ion
o f
the waveform des i red to be magnif ied
observed to the ou te r of the sca le
by
opera t ing
POSITION
of t h e h o r iz o n ta l
ax is .
Next
switch
xlO M G
switch
to PULL pul led
ou t
s t a t e ) . Then the waveform
p laced
a t the
cent
e r
i s magnif ied in
r igh t
and l e f t d i rec t i o n s .
The sweep
t ime
in
t h i s
case
i s
10
t imes
the
sweep speed obta ined by TIME/DIV,
in
o th e r words,
the
reading i s 1/10 o f
the sweep
t ime ind ica ted .
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100
90
100
90
/
I
..
-
/
\
1/
c
\
\
I
@DLY TIME MULT
30
This
cont rol i s used
to s e t
the delay
t ime of
B sweep s t a r t ing point with
r e spec t
to A sweep
s t a r t i n g
point . When the above mentioned
DISPLAY
i s
s e t
in
INTEN
or
B.
4) A
Trigger ing
@ SOURCE
This
switch
i s
used
to
s e l ec t the t r i gge r ing
s ignal
source
A
Sweep.
o CHI Used
when
t r igger ing
i s made by
observing
s ignal
for
CHI
o
CH2
Used when t r igger ing i s made by observing
s ignal for
CH2.
o LINE
Used when
observing a s ignal t r iggered with
the f requency of mains AC POWER).
o
EXT Used
when
t r igger ing
i s made
by
a s ignal
appl i ed to
EXT input connector , indepen-
dent ly from observat ion s ignal .
o EXTdO
Attenua tes
externa l
TRIG INPUT
s ignal
by
a
f ac to r of
10.
@TRIG
INPUT
CH3)
Input
te rminal for
use
for
externa l
t r i gge r ing
s ignal of A sweep.
@COUPLING
This switch
i s used
to s e l ec t
the
coupling mode
of A sweep t r i gge r ing s igna l .
o
AC
At
t h i s se t t i ng
both
the
DC
component and
C
the very
low
f requency
of t r igger ing
s ignal
are
cut of f .
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oHF REJ
Among the
C
components
o f
t r i gger ing s igna l ,
the
high frequency components of
about
4
kHz
or
more are
a t tenua ted .
A s t a b i l i z e d t r i gge r
ing
unaf fec ted
by noises of
about
4
kHz
or
more
can be obta ined.
oLF
REJ
Among the C components o f the
t r i gger ing
s igna l
the
low
frequency
components o f
l e s s
than
about
4
kHz are a t tenua ted .
A s t a b i l i z e d
t r i gger ing f ree from
noises
o f l e s s
than
about
4kHz can
be obta ined.
oDC Trigger ing
s ignal
i s ampl i f ied unchanged.
oTV-H
oTV-V
This
s e t t i ng
i s used when t r i gger ing
with a
very
low
f requency
s igna l or when
ef fec t ing
DC
l ike
t r i gger ing .
This s e t t i ng
i s used when
obse rv ing the ent i r e
hor izonta l picture
of v ideo
s ignal .
This
s e t t i ng
i s used when observing
the e n t i r e
ve r t i c a l
p ic tu re
o f
video s ignal .
INote
I
Both
s e t t i ng
wi l l be
combinated with
TV
pos i t ion on A TRIG MODE
switch.
@ A TRIG LEVEL
This
knob
i s
used to
dec ide
a t which por t ion
of
the waveform shou ld the
sweep
the
s t a r t e d
by
s e t t i ng t r i gge r
level .
This
knob
i s a l so
enabled
to
switch
SLOPE
Depressed
pos i t ion
normal
s t a t e )
i s
for
SLOPE and
PULL
pos i t ion s t a t e
in
which the
knob i s
prot rud-
ing) i s for
SLOPE
*Exp lana t ion o f t r igger po la r i ty SLOPE
Push
a t t ime of
8
SLOPE
Pul l
a t t ime
o f
8 SLOPE
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* Explanat ion of t r i gge r l eve l LEVEL.
/ -+ \At the
t ime
of
o
\ GSLOPE
. - . 1
32
A TRIG MODE
o UTO
o NORM
The
ins trument
i s brought in to automat ica l -
ly t r i gge r ing
sweep in
which
sweep
i s
always conducted.
In the presence
of
t r i g .
gered s ignal , normal t r i gge red
sweep
i s
ob ta ined
and
the
waveform
s tands
still
In the case
of
no
s igna l o r out of t r i g -
ger ing,
sweep
l i ne wi l l appear au tomat i -
ca l ly .
This
s e t t i ng i s convenient
in
usua l cases .
Triggered
sweep
i s ob ta ined and
sweep
i s
conducted only when t r i gge r ing
i s
ef fec ted .
No sweep l i ne wi l l appear in
the case
of
no
s igna l or out of synchron iza t ion . Use
t h i s MODE when e f f ec t i ng synchron iza t ion
to a very low
f requency
s ignal 30 Hz or
l ess ) .
o SINGLE
Conducts
sweep for
one
t ime
by
t r i gge r
s ignal .
o RE DY
At
t ime of SINGLE t h i s
lamp
i s
lit to
show
the
ins trument i s ready
for
s ing l e
sweep. The lamp goes out when the sweep
i s
s t a r t ed .
o RESET At t ime of
SINGLE the RE DY
lamp goes
on by depress ing t h i s switch.
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o TV
Used
when watching t he TV video) s i gna l .
in t h i s case , must be s e l e c t the
TV-V
or
TV-H.
5)
B
Trigger ing
0 B TRIG
CH4)
INPUT
Input t e rminal
for
ex t e r na l
t r i gger ing
s i gna l
for
B
sweep.
Use
it
a f t e r
s e t t i ng
B TRIG MODE to EXT.
B TRIG
MODE
o AUTO B
sweep
i s automat ica l ly
s t a r t e d a f t e r
e laps ing
the delay t ime determined
by
A
sweep and
DLY TIME
POSITION. Usual ly ,
the ins t rument
i s
used a t t h i s
se t t i ng .
o TRIG CH1, CH2
CHl or
CH2 t r i g g e r s i gna l can be s e l ec t ed
independent of
A TRIG SOURCE. Moreover,
In
case observe the video
s igna l , B
sweep should be t r i gge r ed on
TV-H
syn
chroniz ing s i gna l
i ndependent ly of
CHl
or CH2 pos i t i on
as fol lowing
condi t ions .
A TRIG
MODE TV
A TRIG COUPLING: TV-V
B TRIG MODE
CHl o r CH2
o
TRIG EXT For externa l
t r igger ing .
Synchro
niza t ion i e f f ec t ed by apply ing
the input s i gna l i t s e l f or
other
s i gna l
which i s in teger
t imes of
input s i gna l in t ime.
Trigger ing
coupl ing
i s AC f ixed .
This
s e t t i ng
i s
used
when
performing delay t ime
sweep
magnif ica t ion by removing
j i t t e r s .
B TRIG LEVEL
6) Miscel laneous
This knob
i s
used
to
de te rmina l
the por t ion
of
the t r i gge r s i gna l
of
B
sweep
where the
sweep
i s to
be s t a r t ed . This knob
has
no
r e l a t ionsh ip when B TRIG MODE
i s
s e t
a t AUTO Switching
of
s lope
is made
s imul taneous ly by
t h i s
knob. Depressed pos i t i on i s for
8
SLOPE
and
PULL
pos i t ion for
G SLOPE.
~ X T BLANKING
This
i s a
t e rminal for applying
BNC Connector) a
blanking s i gna l from an ex t e r na l
source . The
t r ace
displayed
on
the
sc reen
may
be
i n t ens i ty -
modulated where pulse s igna l or
33
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t ime-scale
marks are required.
V AC s ignal applied
at
the
connector
on the rear of the osci l loscope wil l
provide al ternate
brightness
and blank
ing of
the
t race . Posi t ive voltage
input
decreases
brightness.
t tGATE
OUT A Provides a rectangular output of
TTL
level coincident
with
the
A gate.
B Provides a
rectangular
output
of TTL
l eve l coincident with the B gate .
.
CAL
O.5V
Output
terminal
of ca l ibra t ion
square
wave of
about
1kHz
and
O.5V. I t
has
a
t ip t e r ~ i n a l
I t
i s
used to ca l i -
brate the probe combination .
GND
Earth terminal of
the osci l loscope.
34
Handle
The handle
of the V-I050 can be
posit ioned for
carrying
or
as a t i l t s tand for the
instrument.
To pos i t ion
the
handle press in at both pivot
points and turn
the
handle to the
desired
posi t ion. Posi t ions are
provided for
convenient carrying
or
viewing.
/
\ ;
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8 Specifications
o
CRT
Type
Hitach 150BNB31 rec tangular
mesh type tube
with
20
kV acce l e r a t i on po ten t i a l and
metal
backed
phosphor .
Screen type
P31
phosphor
s tandard
Useful screen area
8 x
10 div l d i v =
10mm)
Grat icu le
In t e rna l
g r a t i c u l e with cent imeter div i s ions
and mm subd iv i s ions a long the
cen t ra l axis
10 and 90 l ines
are
ind ica ted .
I l l umina t ion
cont inuous ly
var iab le .
Focussing
Poss ib le
with
automatic
focus
cor rec t ion
c i r c u i t )
Trace ro t a t ion
Scale i l lumina t ion
Brightness adjustment
Z-AXIS
Present
Var iable
Poss ib le
DC-coupled,
pos i t ive-going s i gna l
decreases
in tens i ty : 5Vp-p
Signal
causes not iceable
modulat ion
a t
normal
i n t ens i ty : DC to 3.5MHz.
Input
impedance
Maximum
input vol tage
Coupling
Approximately
15
kQ
20
V (DC +
AC peak)
DC
o VERTICAL DEFLECTION 2 Iden t i ca l Channels)
Bandwidth and
Rise t ime
DC to a t l eas t
100MHz
and r i s e t ime 3.5ns or
l e s s .
DC
to
a t l eas t
5MHz
and
r i s e
t ime
70ns
or
l e s s a t magnif ie r ex tends .
Lower
-3dB poin t ,
AC
coupl ing 10Hz or l e s s .
Deflec t ion Factor
5mV/div to
5V/div
in 10
ca l ib ra t ed s t eps ,
1-2-5
sequence. Uncal ibra ted continuous cont ro l
extends
def lect ion factor
to a t l eas t 12.5 Volts
per
div i s ion
in
the
5
Vol t s /d iv
posi t ion .
xlO
magnif ie r
increases
s e ns i t i v i t y of
each def l ec
t ion factor
s e t t i ng
to 5 0 0 ~ V / d i v .
Accuracy
x l
+lOC to
+35C)
xlO
+lOC to +35C)
OC
to
+50C)
OC to +50C)
Addi t ional
er ro r
for magni f ie r
Display modes
CHI,
CH normal
or
inver t ) ,
Alterna te ,
Chopped
250kHz ra t e ) ,
Added
Input Impedance
IM
ohm
~ 1 . 5 in
pa r a l l e l
with
28pF
+3PF.
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A Trigger
Source
In ternal ChI, Ch2),
Line,
Externa l ,
Externa l
10
A Trigger Slope
+ or -
TV
Sync
Po la r i t y
TV +)
or
TV -)
Trigger ing leve l
var iab le
range
For
both
A and B. In ternal ;
+4div
or more
Externa l ; approximately +lV
E x t e r n a l ~ l O ; approximately
+lOV
Trigger ing se n s i t i - For
both
A and
B.
However,
v i ty
and
f requency
)
i s
only
for
B
Frequency In t e rn a l
Externa l E x t e r n a l ~ l O
DC 30Hz)
-
10MHz
0.3
div 50
mV 500
mV
10
MHz
-
100MHz 1.5 div
150 mV
1.5 V
TV-V
s e n s i t i v i t y :
SYNC
sec t ion l e s s than 0.7div
or 200mV
AUTO
low band
A Trigger
Coupling
Approximately
30Hz
When Time
Base
A
i s
20ns/DIV
to 2ms/DIV)
AC : 30Hz to
f u l l
bandwidth
HF
REJ: at tenuates s ignals
below
approx 4kHz
LF REJ: at tenuates s ignals
above
approx 4kHz
DC : 0 to fu l l bandwidth
A Externa l Tr igger
Input
Impedance
IM ohm ~ 2 0 in
p a r a l l e l
with 28PF ~ 6 P F However,
s e t t i n g
HF
REJ and LF REJ
are
not inc luded .)
Maximum
Input Vol tage
250V DC + AC peak a t 1kHz o r l e s s )
500Vp-p AC a t 1kHz
or
l e s s
B Trigger Modes
and Source
Automatic,
Normal
ChI,
Ch2,
Externa l)
B
Trigger
Slope
or
-
Trigger Coupling
AC
only;
30Hz
to
fu l l
bandwidth
o X-Y OPERATION CHI; Horiz. CH2;
Vert . )
Def lec t ion Fac tor
Same as
v e r t i c a l
def lect ion
Accuracy
Y: +2 +lOC to +35C), OC to +50C)
X: +lOC to +35C), OC
to +50C)
X-Bandwidth
DC
to
a t l eas t
2MHz
Phase Error
3 or l e s s from DC to 2MHz
37
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o CALIBRATOR
0 . 5 V ~ 1
Frequency
l k H z ~ l square wave
Rise t ime 5ps or l e s s
o
OUTPUT
SIGNALS
A GATE
OUT
TTL OUTPUT (74LSOO
with
OUTPUT s e r i e s
r e s i s t ance 100D
B
GATE OUT
TTL
OUTPUT
7400
with OUTPUT s e r i e s
r e s i s t ance 100D
o POWER SUPPLY
VOLTAGE 50/60Hz)
FUSE
100 V ( 90 - l lO V) 2A
120 V 108 -
132
V)
2A
220
V
199
-
242
V)
lA
240 V
(
216
- 264 V) lA
Nominal
vol tage
+
5
a t 400Hz
o Power supply
Power
supply
frequency
Power consumption
50, 60, 400Hz
Approximately
60W
o ENVIRONMENT
38
Limit of
opera t ion
temperature
Limit of opera t ion humidi ty
OC - 50C
35 - 85
Rated range of use temperature
Rated range
of use
humidi ty
Storage temperature
o DIMENSION AND WEIGHT
310w x 180h x 410d mm
12.2w
x
7.1h
x
16.1d
in
10.2kg 22.5 Ibs
10C - 35C
45 - 85
-20C
-
+70C
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9
Users
djustments
1) TRACE
ROTATION
Adjust the TRACE ROTATION on the f ron t
panel
when
s l i g h t
t i l t i n g
of
the t r ace i s caused by
t h e e f fec t of
ex ternal
magnet ic
f i e lds .
Make cer t a in tha t t i l t i n g of the t races i s not
caused by the e f fec t of unusually s t rong
ex ternal
magnet ic f i e lds
due to the posi t ion
of
the
osc i l loscope .
2)
ASTIG ADJUSTMENT
Set t h e
knob
DISPLAY switch
to
X-Y and MODE
switch to CH X-Y
obse rv ing
t h e spot
on
the
c e n te r of t h e screen .
RVI038
ast igmat ism adjus tment
provides
optimum
spot
POWER/INTENSITY roundness when used in con
junc t ion with