Tektronix 2235 - Settings for B

P erfo r ma n ce C h ec k Procedure-2235 Service
b . Connect t he leveled sine-wave gen erator o u t pu t via α

e . Disconnect t h e test e qu ipment from t he i n strume n t .
50-
Ω
cable and α 50-
Ω
te
r min
atio
n
to t
h
e C H 2 O R Υ in p ut
connector .
c . Set t he generator to p r oduce α 50- kH z, 6-divisio n
d is p lay .
d . C HE C K -Dis p lay am p litu de is 4 .2 d ivisions or greater
as t he generator ou t pu t fre q uency is increased up to t h e
val u e sh own in Ta b le 4-3 for t he corres p ondi ng V O L TS/DI V
switc
h
setting
.
α . Set :
Ta b le
4-3
Setti
n
gs fo
r B
a
nd wi d
t
h
C
h
ec
k
s

c . Set t he generator to p roduce α 50- MH z, 6- d ivision
d is p lay .
V O L TS/DI V
Switc h
Setti
n g
2 m V
5m
V
to5
V
6 . C h
ec
k Ba nd wi d t hL imit O p eration
Ge
n
e
r
ato r
O u t pu t Fr e quency
e .
R
epeat p arts ca
n
dd for all
i
nd icate d CH 2 V O L TS/DI V
switc h settings,
up to
t h
e outp ut-voltage u pp er limit of t h e
sine-wave generator b eing used .
f . M
ove t he cable from t he C H2 O RΥ input connector to
t h
e C
H 1
O
RΧ in p
ut connector . Set t
h
e VER TICA L M OD E
switc h to C H 1 .
g . R e peat p arts c and d for all indicated C H 1
V
O LTS/DI V switc h settings, up to t h e output-voltage upp er
limit
of
t h
e sine-wave generator b ei
ng
use d .
BW L
I
M IT

On (button in)
C
H 1 V
O L TS/DI V 10 m V
Α
S
E
C/DI
V
20 μs
b . Set t h e generator to pr oduce α 50- kH z, 6-divisio n
display .
c . I n crease t he generator
o
u t p
ut
fre
q uency u
n til
t
h
e dis-
play amplitude decreases to
4
.2 d ivisio ns .
d . C HE C K -Generato r output fre q uency is b etwee n 18
and
22 MH z .
7 . C h ec k Commo n - M ode R e j ectio n R atio
α . Set :
BW L I M IT

Off ( b utto n out)
C H2 V O LTS/DI V 10 m V
I NVER T

On ( bu tton in)
b . Connect t he leveled sine-wave generator o u tp u t via α
50- Ω cab le, α 50- Ω termination, and α dual-in pu t coup ler
to
t h e C H 1 ORΧ and t h e C H 2 ORΥ in p ut co nn ectors .
d . V ertically center t h e dis p lay u sing t h eC h annel 1 P OSI-
90 MHz

ΤΙΟΝ control . T hen set t h e VER TICA L M OD E switc h to C N
2 and vertically cente r t he display using t he C h annel 2 PO-
100 MHz

SITIO N co n trol .
e . Set t h e VER TICA L M OD E switc h es to BOTH and
ADD .
f . C HE C K -Dis p lay am p lit ude is 0 .6 division o r less .
g . If t h e check in p art f meets t h e req u irement, s k ip to
part ρ . If it does not, continue wit h p art h .
h . Set t h e VER TICA L M OD E switc h to C H 1 .
i . Set t h e gene r ator to p roduce α 50- kH z, 6-division
display .
j . Set t h e VER TICA L M OD E switc h to BOTH .
k . A d ju st t he C H 1 or C H 2 V O L TS/DI VV aria b le control
fo r min imum d is p lay am p lit ude .
Ι . Set t h e VER TICA L M OD E switc h to C H 1 .
m . Set t he generato r to produce α 50-MHz, 6-division
dis p lay .
η . Set t h e VER TICA L M OD E switc h to BOTH .