Tektronix 5440 Instruction Manual page 72

Ad
j ustment-5440
c . Set t
h
e time-
b
ase u
n
it for α calibrate d
sweep rate of
20 ns/division a
n
d triggering for auto mo d
e, ac couple
d
from t h
e
LEF
T so
ur
ce . Ad
j
ust trigger level control for α
sta
b
le d is
p
lay, trigge r
ed on t
h
e risi
n
g p o
r
tio
n
of t
h
e p ulse .
Center t
h
e p
u
lse
h
orizo
n
tally on t
h
e graticule .
d . C
HE
C
K
-
F
or optimum s
q
uare leadi
n
g corner a n
d
flat top on α 5- d
ivisio
n
displayed p ulse wit
h
abe
r
rations
not to excee
d
+0 .15 or-0 .15 d ivisio n
, wit
h
total pea
k
-to-
p
ea
k
aberratio
n
s not to excee
d
0 .15 d ivision .
e . AD
JU
ST-
V
ertical com
p
e
n
satio
n R
121 foroptimum
flat top on t
h
e d isplaye d p ulse, t
h
e
n
ad
j
ust R 120 an
d R
123,
g . P
ress t
h
e
P
O
WER
switc
h
to turnoff t
h
e Oscillosco p e
i
n
creasi
n
g t
h
e sweep
rate of t
h
e time-base, w
h
e
n
an
d i n
stall t
h
e vertical am p lifier i
n
t
h
e ce
n
ter vertical
n
ecessary . R e p eat as necessary to obtai
n
optimum flat top
com
p
artme
n
t . Pull t
h
e
P
O
WER
switc
h
ON .
on t
h
e waveform . See F ig . 5-4 for a d
ju
stme
n
t locatio
n
.
f . AD JU ST-
V
ertical compe
n
satio
n
s C637 (t
h
is ad
j
ust-
h.
R epeat parts
d
t
h
roug
h
f for t
h
e center vertical
ment is locate
d
on t
h
e main interface board between
com
p
artme
n
t.
vertical com
p
artments, S
N
Β 063251-υρ ), C115, R 115,
C155, R 155, R 167, a nd
C181 in t
h
e or
d
er give
n
, for
o
p
timu m
sq
uare lea
d
i
n
g cor
n
er wit
h
aberratio
n
s wit
h
in
i .
Press t
h
e P O
WER
switc
h
to turnoff t
h
e Oscillosco
p
e
t
h
e limits give
n in p
art
d
of t
h
is step . T
h
ere is d irect
a
n
d d isco
nn
ect cable a
n
d termi
n
ation from t
h
e e
qu
i
p-
i
n
teractio
n
between C115 a
n
d R 115, a
nd
betwee
n
C155
me
n
t .
a
n
d R 155 . B est
r esults are usually o
b
tai
n
e
d
by setti
n
g
R 115 f
u
lly cloc
k
wise, t
h
e
n
ad
j
usti
n
g C115 . See F ig . 5-4 for
ad
ju
stme
n
t location .
g . AD
JU
ST-
R
155 an
d R
167 for mi
n
imum ringing of
fro
n
t corner . A
dju
st C637 (on t
h
e mai
n
i
n
terface board
betwee
n
vertical compartme
n
ts, S
N
Β063251- υρ ), C155
a
n
d C115 for α level f
r
ont cor
n
er. After fro
n
t co
rn
er
ad
ju
stme
n
ts
h
ave been made, ad
j
ust C181 for o
p
timum
r
isetime a
nd
mi
n
imum fro
n
t cor
n
er spi
k
e .
h .
P
ress t
h
e P O
WER
switc h
to tur
n
off
t
h
e
Oscillosco p e, and install t
h
e
V
ertical Amplifier i
n
t
h
e
ce
n
ter com
p
artment . Pull
P
O
WER
switc
h
ON .
i . R epeat parts d t
h
roug
h
g . If necessary, compromise
t
h
e vertical compensation a
dj
ustment to obtain t
h
e best
res
p
o
n
se for bot
h
left an d rig
h
t vertical com
p
artme
n
ts .
4 . C
h
ec
k B
andwidt
h
α .
P
ress t
h
e
P
O
WER
switc
h
to turnoff t
h
e Oscilloscope
and install t
h
e vertical amplifier i
n
t
h
e left vertical com-
p
artment . Pull t
h
e
P
O
WER
switc
h
ON .
b . Set t
h
e time-base u
n
it for α sweep rate of
10 μ s/divisio
n
.
d . Set t
h
e vertical amplifier volts/division switc
h
to .1
and a d j
ust t
h
e si
n
e-wave ge
n
erator co
n
trols for α 6-
divisio
n
dis p lay at α fre q ue n
cy of 3 mega
h
e
r
tz .
e . W it
h
out c
h
a
n
gi
n
g t
h
e out
p
ut amplitu d e, increase
t
h
e ge
n
erator fre
q
uency
un
til t
h
e d isplayed am
p
litu
d
e is
red uced to 4 .2 divisions .
f . C
HE
C
K
-T
h
e ge
n
erator for α rea d
i
n
g of at least 60
mega
h
ertz .
T
h e Calibration Fixture is use d for th e h o rizontal
system adjustment procedure . Wh en a different
amp lifier plug-in is use d to verify
h
o rizontal
specifications, the amplifier frequency must be
consid e re d . An alte rnate p roce dure is provided
w h en th e 5A48 is substituted for the Calibration
Fixture plug-in unit.
Install Plug-in
U
nits
H O
R
IZO
N
TA
L
SYST
EM
ΝΟΤΕ
I
n
stall t
h
e Cali
b
ration F
ixture i
n
t
h
e
h
orizontal p l
u
g-in
compartme
n
t an
d
t
h
e time-base
un
it i
n
t
h
e left vertical
compartme
n
t .
Control Settings
Calibratio
n F
ixtu
r
e
P
osition
M i d ra
n
ge
c . Disco
nn
ect t
h
e
BN
C cable from t
h
e
pu lse ge
n
erator
Am
p
lit
ud
e M i
d
range
a
nd
connect it to t
h
e out p ut connector of t
h
e si
n
e-wave Test Switc
h Common M ode
ge
n
erator . R e p R ate 1 MHz
5-8
REV.
Α ,
J
A
N
. 1977