Tektronix 2235 User Manual

level differe nce is more t han 10 times t h e V O LTS/DI V 3 . Con
n
ect
t h
e p
ro be tip to t h e signal so ur ce and wait
switc h setti ng :

several seconds
for t h e inp u t coupling ca p acitor to c
h
a
r
ge .
1 . Set t
h
e
AC-G N D-DC switc h to G N D .

4 . Set t
h
e AC-G
N D-DC switc h to AC . T he dis p lay
will
remain on t
h
e
screen, and t he ac com ponen t of t he sig
n
al
ca n b e
measured in t he no r mal ma nn er .
2 .
I n
sert
t h
e pro
be tip into t h e oscillosco p e G ND conn ec-
tor a
n
d
wait several seconds for t he i np ut cou p ling cap acitor
to disc
h arge .
I N T
R
OD U
CTIO N
Two ad j ustments sh ould be performed before
ma k i n g
measurements wit h your oscilloscope :
T r ace Rotation and
Probe Com p ensation . B efore starti
ng eit h
er of
t h ese ad j ust-
ments, set t he instrument con trols and ob tain α b aseline
trace as describe d u nder " B aseline Trace" on
t h
e
next p age .
Allow t he instr u ment to warm up
for
at least
20 min utes
w hen s p ecified i n t he p roce d ure .
TR AC E R
OTATIO N
1 . U se t he C h annel
1 POSITIO N control to move t h e
b aseline trace to t h e ce
n
ter
h orizontal graticule line .
ΝΟΤΕ
No r mally, t he res u
lti ng tr
ace
will be p a r allel to t he ce n -
ter h orizontal g
r
aticule
line, an d t he Trace Rotatio n
a dj ustment sh ould not be re qu i
r
ed .
2 . If t he resulting trace is not p arallel to
t h
e
center h o r i-
zon tal graticule line, use
small flat-bit screwdriver to ad ju st
t he T R AC ER OTATIO N co
n
trol and
align t he trace wit h t he
center h orizo n tal gratic u le li ne .
PR O
BE
CO
MPEN SATIO N
O
PER ATO R 'S AD JU ST MEN TS
O pe r ati ng I n st r uctions-2235
Service
loscope probes
b efore ma k ing measurements . Probe
com p ensation is
accom p lis hed as follows :
1 . Connect t h e two 10
Χ
probes (s
upp lie d wit h t h e instr u -
ment) to t he C H 1 and C
H 2 in p
ut co
nn ectors .
2 . Set b ot h V O L TS/DI V
switc h
es to
0 .1 (10 Χ PR O BE)
an d set b ot h AC-G
N D-DC switc h es to DC .
3 . Select C
H 1 VER TICA L M OD E and insert t he ti p of t h e
C h annel 1 p ro be into t h e
PR O BE AD JU ST output j ack .
4 . O b tain α d is p lay of
t h
e
PR O BE AD JUST sig n al (ap-
proximately
1 kH z
sq
u are-wave) by following ste p s 3
t h roug
h
6 under
"Signal Dis p lay" on t he next page .
5 . C heck t he waveform presentation
for overshoot and
rolloff (see Figure 2-9) . If necessary, ad ju
st t he probe com-
p ensation for flat tops on t
h
e
waveforms . R efer to t h e in-
str u ctions supp lied wit h t
h
e p ro
b e for details of
com p ensation ad j ustment .
6 .
Disconnect t he C h annel 1 probe ti p , select
C H 2 VER-
TICA L M OD E , and con nect t h eC
h annel 2 p ro b e tip to t he
PR O BE AD JU ST Output j ack .
M isad j ustme n t of probe com
p ensation is o n e of t h e

7 . R epeat steps 4 and 5 for t
h
e C
h annel 2 p ro be .
source of meas u
rement error . M ost atten u ator p ro b es are
e qu i pp ed wit h α
compensation ad j ustment . To ens ur e op ti-
mum measureme
n
t accuracy,
always com p ensate t he oscil-

8 . Disconnect t h e C
h
a
n nel 2 prob e tip .

Tektronix 2235 Specifications

General

Brand	Tektronix
Model	2235
Category	Test Equipment
Language	English