Tektronix 2235 - Adju St Slope B Alance; Chec K Nternal Trigge Ring

b . Con n ect t he leveled sine-wave gene r
ator out p ut
via
α

5 . C h ec k I n te r nal Trigge r i ng
50- Ω cable and α 50- Ω te r min ation to t he C H 1 O RΧ in p
ut
connector .

α . Set :
C H 1 V O L TS/DI V 5 m V
CH 2 V O L TS/DI V 50 m V
c . Set t he ge n erator to produce α 50- kH z, 2 .2-division

Α and Β SE C/DI V 0 .2 μs
dis p lay .

Α& Β ΙΝΤ

C H 1
d . Set t h e C H 1 V O L TS/DI V switc h to 1 V .

b . Set t he generator to p roduce α
10-MHz, 3- d ivision
d is p lay .
e . AD JU ST-Trigger Se n sitivity ( R
479)
w h ile
rotating
t h eΑ TR IGG ER LEVEL con trol slowly so t h at t he Α Tr igge r
is j ust able to b e maintained .
α . Set t he CH 1 VO LTS/DI V switc h
to 50
m V .
b . Set t he generato r to p rod u
ce α
4-divisio n
d is p lay .
c . AD JU ST-Slo
p e
ΒαΙ ( R 471)
for α downward vertical
sh ift of 0 .22-divisio n at t h
e start of t
h
e swee p wh en chan g-

Α TR IGG ER M ode
ing t h eΑ TR IGG ERSL O PE switc h b etwee n t h
e O U
T
a nd IN
p ositions .

N O RM
4 . Ad j ust Ρ - Ρ A u to Trigger Ce n
te
r i n g ( R
434 a nd
R 435)
α . Set :
Α T RIGG ER
S
L
O
PE

O U T
Α T RIGG ER LEVEL

F ully
cloc k wise
Adju stme n t Pr oce dur
e-2235 Service
ε . Set t he CH 1 VO LTS/DI V switc h
to 50 m V .
d . C HE C K -Stable display ca n be obtai n e d b y
ad j usti
n g
t h
e
Α
TR IGG ERLEVEL con trol for eac h switc h com b i n ation
3 . Ad j ust Slo pe B alance ( R 471)

give n
in Table 5-8 .
Table
5-8
Switch Com b i n atio n
s fo
r Α T r igge
r ing C h ec ks
N O RM
Ρ - Ρ A U TO
Ρ - Ρ A U TO
e . Set t h e H O R IZO N TA L M OD E
switc
h
to Β .
b . Set t h e ge n eratorto prod u ce α
50-
kH z,
5-divisio n
dis p lay .

f . C HE CK -Sta b le d is p lay can be ob tai n
ed b y a dj usting
t h
e Β TR IGG ER LEVEL control i n α p
ositio n ot he r t han t h e
Β RUN
S
A
FT ER DL Y p ositio n for b ot h t h
e O UTa nd IN
c . Set t he CH 1 V O LTS/DI V
switc
h
to 0 .5 V .

positions
of t he Β TR IGG ERSL O PE switc h .
d
.
AD
JU
ST-(+)
Auto (
R
434) so t h at t he vertical dis-

g . Set :
play
j ust soli d ly triggers
on t h e p ositive pea k of t h e signal .

V
ER TICA L M OD E

CH 2
H
O R IZO N TA L M OD E

Α
e . Set :
Α
&
Β ΙΝΤ

C H 2
Α
TR IGG ER S L O PE
OU T
IN
IN
O U T
Α TR IGG ER SL O PE

IN
Α TR IGG ERLEVEL

F ully
cou ntercloc k wise

h .
M ove t he cable f r om t he C H 1 OR Χ i np
ut conn ecto r
to t h
e C
H
2 OR Υ i npu t co nn ector .
f . AD JU ST-(-) Auto ( R 435) so t h
at
t h
e dis p lay ju st
solidly triggers on t h e negative pea k of t he signal .

i . R
ep eat p arts d t h ro ugh f .