Tektronix 2235 - TRIGGER

A dju stme n t Pr oced ur e-2235
Service
E quipme
n
t
R
eq
u ired (see Table 4-1) :
L eveled Sine-
W
ave
Ge ne r ator (Item 2)

10 Χ Atte nu ato r (Item 7)
50- Ω BN C Cable
(Item 4)

Digital V oltmeter (Item 12)
50-
Ω
BN C
Termination (Item 5)

Screw d river (Item 13)
Β T R IGG ER
Α T R
IGG
ER
T R IGG ER
See

AD
JUST MEN T L OCATIO N S 1
at the b ack of this manual for test p oints and a djustment locations .
I N ITIA L CO N T R O L S E TTI N GS

PR OC E D URE ST EP S
P
OSITIO
N

M i d ra nge
H
O
R IZO N TA L M
OD
E

Α
Α and ΒSE C/DI V 1 ms
S E C/DI
VV
aria b le

CA L
detent
Χ 10
M agnifier

Off ( k
nob
in)
ΒD ELAY TIME P OSITIO N

F ully counte r cloc kwise
SL O PE

O UT
LEVEL

M idrange
1 . Ad ju st T r igge r Offset (11309)
V ertical (Bot
h
C
h
annels)

α . Set t h e C h annel 1 trace and t he C h annel 2 trace to
P OSITIO
N

M idrange

t he center h orizo n tal graticule li ne usi n g t h eC han nel 1 and
VER TICA L
M OD E
BOTH-ALT

C hann el 2 P OSITIO N con t r ols .
BW L I M IT

Off ( bu tton out)
V O L TS/DI
V 0 .5 V
V
O
L TS/DI VV aria b le

CA L detent

b . Connect t he digital voltmeter low lea d to ch assis
I NVER T

Off ( bu tton out)

ground and t h e h ig h (volts) lea d to
W
4000-1
(Alt
Sweep
AC-G
N D-DC

G N D

L ogic circuit board connector to t he M ain circuit board) .
c . C HE C K -T h e offset voltage read i
ng
is less t h a
n
80
H
orizontal

m V . N ote t he reading for u se i np art e .
d . Set t he Α & Β ΙΝΤ switc h to CH 1 .
e . AD JU ST-Trigger Offset (
R
309) so t
h
at t
h
e voltage
rea d ing is t he same as t
h
at o b tained
in
part c .
f . Set t he Α & Β ΙΝΤ switc h to CH 2 .
g . R epeat parts ε t h roug h f until t here is 1 m V or less
d iffere n ce i n t he voltmeter r eadings b etwee n t he CH 1 and
C H 2 positions of t h e Α &Β ΙΝΤ switc h .
V A RH
O
L
DO
FF

N
O
RM

2 . Ad ju st T r igge r Se n sitivity ( R 479)
M ode

Ρ - ΡAU TO
S L O PE

O U T

α . Set :
LEVEL

M id r ange

VER TICA L M OD E

CH 1
Α &Β ΙΝΤ

C H 2

C H 1 V O L TS/DI V 0 .1 V
Α SO UR CE

ΙΝΤ

AC-G N D-DC (bot h )

AC
Α ΕΧΤ CO UPL I NG

DC

ΑS E C/DI V 10 us