Tektronix 2235 Operator's Manual

Operating Pr
oce d ures-2235 A N
I
U S M
-488 Op e r ators
Instantaneo u s V
oltage
4-8
~
MEMO
0

MEN
ME
ΝΕΕ
Ε
FAMMMWA
WON
M
-ME FAME
ONE
E MEN
F ig u
re
4-2 . P
ea k -to- p ea k w
avefo rm voltage .
Su b stituting t he give
n v alues :
V olts (p-p) = 4
.6 d iv χ 5 V ldiv = 23 V .
4732- α 7
9 . Calcu late t h e p ea k -to-pea k
voltage, usi ng t h e follow-
ing fo r mula :
E XA M P LE : T he
measu
r
ed p ea k -to-pea k ve r tical d eflec-
tio n is 4 .6 d i v isio ns (see F ig
u re 4-2) u si ng α 10 Χ atten u a-
tor pro be wit h t he
VO LTS/
DI V
switc h set to 5 V (at 10 Χ
PROBE setting) .
To
measu r e i n
stantaneous level at α given point on
α
waveform, referre d to g r
ou
n
d, use t he following pr
oce d ure :
1 . P reset i n
st
r
ument controls an d ob tain α b aseli n
e
trace .
3 .
V
erify t h at t h e VO L TSIDI VV ariable
co
n
t r ol is in t he
CA L d etent a n
d set t he Inp u t Co u pling
switc h to G N D .
4 . V ertically p
ositio n t he baseline trace
to t h e center h or-
izontal graticule
line . T h is esta b lis h es t he g r oun
d reference
location .
ΝΟ
r
Ε
If meas ur ements are to
b e made relative to α voltage
level ot h er th an g r o un d, set t h
e Input Co u pling switc h
to V C instead,
and
apply
t
h
e refe re n ce voltage to t he
inp u t con n ecto r . Th en
position
t h
e t r ace to t he refe r -
ence (ho r izontal gratic u le) line .
5
. Set t h e Inp u
t
Co u pling switc h to DC . P oints
on
t h
e
wavefo r m a
b ove t he grou nd r efe r ence location ore p
ositive .
T hose points b elow
are
n
egative .
ΝΟΤΕ
1f using C h anne12,
ens ur e t h at t he C hannel 21NVERT
NOTE

mode is not selected
(C
h
annel 2 P OSITION
control
If t h e amplit u de meas ure m ent
is critical or if the t r
ace
knob is pushed in) .
is thic k (as α r esult of h
um or noise on t h e
signal),
α

6 . If n ecessary,
repeat Step 4 usi ng α d ifferent r
efe
r
ence
mo re accur ate val
u e can be obtai n ed by measuring

li ne w h
ic
h
allows t he wavefo r m in Step 5 to b
e dis p laye d on
f r om t he tap of α p eak
to
t h
e top of α valley . This will

screen .
eli m inate trace thickness f r om the
meas u reme n t .
7 . A d ju st t he Α TR
IGG E R LEVEL control
to obtai n α sta-
b le d isplay .
VO L TSIDI V
vertical

switc h setting

8 . Set t he Α
S
E
CIDI V switc h to α positio n
t
h
at d is p lays
V olts
(p-p) =

d eflection

χ

indicated b y 1 Χ

several
cycles of t he signal .
( d ivisions)

(or
10 Χ PROBE w hen
10
Χ
pr obe is u se d )
9 . M easu r
e t
h
e d ivisions of vertical deflection
b etween
t he grou n
d
r
eference line and t he p oi n t
on
t h
e wavefo
rm
at
w h ic h t he level
is to b e d eter m ined (see F ig u re 4-3) .
REFERE
NC
E
L I NE

Β
--_ --_--_
VE R TICA L
D E FLE CTIO N
M E AS URE POSITI VE
AM PL IT UD E
TO
O R N EG A TI VE A MPL IT U DE
2 Apply t h e s έ g ηα ,

ι
to eit h
er verticalc hann el in pu t
con

©

ΤΟ
.--
POSITIVE
REFEREN C E L I N E
nector and set t he VER TICA L M ODE
switc h to d is p
lay t he

Ι

4732-08
= -

"-, .,-- .-
cha n neluse d .

F igure 4-3
. I n stantaneous voltage
meas u rement .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English