Tektronix 2213 - Page 58

d . C HE C
K -Deflection accuracy is wit
h i n
t
he limits
given in Ta b le 4-2 for each C H 2 V O L
TS/DI V switc h set-
ti ng a nd corres po n d i ng stan d a
rd -am p litude signal . P erfo r m
the ch ec k s from t
h
e b ottom
to t h e to p of Ta b le 4-2 to
avoi d unnecessary switc h - p ositio n
c han ges . Wh en at t he
20-m VVO L TS/DI V
switc h setting, r otate t he C H 2
V O L TS/DI
VV aria b le control fully co un te r cloc k wise a
n
d
C
HE
C
K t h at t h e d is p lay decreases to 2 d ivisions or
less .
T hen retu r n the V O L TS/DI VV aria
b le control to t he
CA L d ete n t an d finis h t he ch ec k .
e . Disconnect t
h e
test
setu p .
2 . C h ec k B an d widt h
α . Set :
V O L TS/DI
V ( b
ot
h )

2 m V
S E C/D 1
V

20 μ s
b .
Co nn ect t he levele d sine-wave ge
n erato r outpu t via
α 50- Ω ca b le and α 50- Ω
termi n atio n to t he C H 1 O R Χ
input con nector .
ε . Set t he ge n e r ato r output am p
lit ud e fo r α 5- d ivision,
50- kH z dis p lay .
d . C ha n ge t h e gene r ator outp
u t fre quency to the value
s h ow n i n Ta b le 4-3 fo r t
he
co
rr espo n ding V O L TS/DI V
switc h setti n g .
Setti
n
gs fo
r
B
a nd wid t h C h ec k s
Table 4-3
e . C HE C K -Dis p lay am p litu
de is 3 .5 d ivisions o r greate r .
f . R epeat parts ε t h roug
h e for all i nd icate d CH 1
V O L TS/DI V switc h setti
n
gs, up
to t he outpu t-voltage
up per limit of the sine-wave ge
n erator b eing use d .
g .
M ove
t he gene r ator outpu t sig n al fr om t
he
C
H 1 O R
Χ i nput co
n nector to t he CH 2 O R Υ i np ut co
n nector . Set
t h e VER TICA L M OD
E switc h to CH 2 .
Performance C h ec k P roce du re-2213 Service
h . R ep eat p arts c t hr oug
h e fo r
all
i n dicate d C H 2
V O L TS/DI V sw itc
h settings,
up
to t he ou t pu t-voltage
uppe r limit of t
he sine-wave ge n erato r being use d .
3 . C h ec k Common- M od e R e j ectio n
R atio
α . Set b oth VO L TS/DI V switc h es to 20 mV .
b . Co n nect α 10-MHz, levele d
sine-wave signal via α
50- Ω ca b le, α 50- Ω te r mination, an d α dual-i n pu t cou p
le r to
t
h e
CH 1 O
R Χ and t h e C H 2 O R Υ i np ut connectors .
ε .
Set the generator ou tp ut am p litu de to prod
u
ce
α
6- d ivision dis p lay .
d .
V ertically ce n te r t he d is p lay using t he C h annel 2
P OSITIO N con trol . T hen set VER TICA L M OD E to CH 1
a nd vertically center t he d is p lay u sing t
h
e C
h
a
n nel 1
P OSITIO N cont r ol
.
e . Set t he VER TICA L M OD E switc h es to BOTH and
ADD ; t he n pu s h in t he I NVER T butto n .
f . C HE C K -Dis p lay am p lit u de is 0 .6 d ivisio
n
o
r
less .
g . If t h e ch ec k in part
f
meets t
he re qu i r eme n t, s k i p to
p art η . If it does not, conti nue wit
h p
art
h .
h . Set VER TICA L M OD E to C H 1 .
i .

C han ge t h e ge
n
erato
r fre q
ue
n
cy
to
50
kH z an d a dju st
t he outp u t to obtain α 6- d ivision d is p lay .
j . Set VER TICA L M OD E to BOTH .
k . Ad j ust
t h e
C
H 2 V O L TS/DI VV aria b le co n tol for
minimum
display am p litu de ( b est C MRR) .
Ι .

C h ange t h e generator f r e qu ency to 10 MHz .
m . C HE C K -Dis p lay am
p litu d e is 0 .6 d ivision or less .
η . Disconnect t he test setup .
V O L TS/DI
V
Switc h Setti
n
gs
Ge n erato r
O ut pu t Fr equency
2m V to10m V Ι 50
MHz
20 mV to10 V
1
60
M H z