Tektronix 2235 - Page 55

c . Ad j ust t
h
e C
H
2 V O L TS/DI V V aria b le control to pr o-

Ι . R e p eat p arts b
and c .
du ce α 4 .4-divisio n
dis p lay . Set t he C H 2 V O L TS/DI V switc h
to 10 m V .
d . C
HE
C
K -T
he b ottom and to p of t h e trace may b e
p ositio ne d
above and b elow t h e center h o r izo n tal graticule
li ne by rotating t h
e C
h
an
n
el 2 P OSITIO N control f u lly cloc k -

4 . C h ec k Aberratio n s
wise a nd cou
ntercloc
k
wise res p ectively .

α . Set :
3 . C h ec k Trigge r V iew
Gain
α . Set :
V ertical P
OSITIO
N
(bot
h )

M i drange
V O L TS/DI V ( b ot h )

0 .1
V
V O L TS/DI VV
a
r
ia b le ( b ot h )

CA L detent
b . Wh ile h ol d ing in t h
e
TR
IG
V I EW
b utto
n ,
u se t h eΑ
TR IGG ERLEVEL con trol to vertically
center t
h
e dis p lay .
c . C HE C K -Dis
p lay
amplitude
is
4
to 6 divisions w h ile
h ol d ing in t h eT R IG V I EW bu tton .
d . M ove t h e cable from t h eC H 1 O RΧ in p
ut connecto
r
to
t he C H2 O RΥ in pu t
connecto
r .
e . R epeat parts b and c .
f . M ove t h e ca b le from t h
e
CH 2 O RΥ inpu
t con n ector to
t he ΕΧΤ I NPU T conn ecto r .
Set
t h
e
Α
SOUR C E switc h to
EXT .
g . R e p eat p arts b and c .
h . Set t h e Α ΕΧΤ CO UPL I N
G switc
h
to DC .
i . R ep eat pa r ts b a nd c .
j . Set t h e Α ΕΧΤ CO UPL I N G switc h
to DC
_
10 .
5 . C h ec kB an d widt h
α . Set :
P erfo r mance C h ec k Pr oce dur e-2235 Service
m . Discon n ect t he test eq ui p me n t from t h
e instrume n t .
BW L I M IT

Off ( bu tton out)
e .
M
ove t
h
e cab le from t h e C H 2 O R Υ in pu t connecto r to

V O LTS/DI V ( b ot h )

2 m V
t he C H 1
O
RΧ in p
ut co
nn
ector and set t h e VER TICA L
AC-G N D-DC (bot h )

DC
M OD E switc h to
C
H 1 .

Α SE C/DI V 0 .05 Ει s
f . R e p eat p
arts c a
n
dd
using
t he C h annel 1 co n trols .

b . Con
n
ect t he fast- r ise, p ositive-going square-wave out-
pu t via α 50- Ω cab le, α 10 Χ atte nu ator, and α 50- Ω termi n a-
tion
to t
h
e C H 1 ORΧ i np ut co n nector .
c . Set t he gen erator to produce α 1-MHz, 5-divisio n
display .
d . C HE CK -Display ab er r atio ns are wit h i n 4%
(0 .2
divi-
sion o r less) .
e . R epeat p art d fo r eac h of t he following V O L TS/DI V
switc
h
settings : 5 m V t hr o u g h 0 .5 V . Ad j ust t h e gene r ato r
output a nd attac h o r remove t he 10 Χ atten u ator as neces-
sary to mai n tain α 5-divisio n dis p lay at eac h V O L TS/DI V
switc h setting .
f .
Disconnect t he cab le from t h e C H 1 OR Χ input
con-
nector . R econnect t h e 10 Χ attenuator (if p reviously r e-
moved) and reduce t h e ge n erator amplitu de to minimum .
g . Connect t h e cab le to t he C H 2 OR Υ in p ut conn ector
and
set
t h
e
VER
TICA L M OD E switc h to C H2 .
h . Set t h
e generato
r
to p roduce α 5-divisio n dis p lay .
i . R
epeat p arts d and e u si n g t he C h ann el 2 con trols .
j . Disconnect
t
h
e test equ i p ment f r om t h e instrument .
V
O
L
TS/DI V (bot h )

2 m V
k . Set t he generator to p roduce α 5- V signal .

Α
SE C/DI V 20 Ει s
4-5