Tektronix 5440 Instruction Manual page 73

M
ai
n
Triggeri
n
g
Time-
B ase
Un
it
Slo
p
e
+
M
ode
Auto
Trigger Source
L
eft
Position As
d
esire d
M ag
Χ1
Mai n Sec/Div
1 ms
Dis play
M
ode Mai n Sw
p
1 . A
d
j ust
H
orizontal Centering
α. Pull P O WER switc h to turn on the Oscilloscope an
d
chec k for α vertical trace over th e e ntire graticule area .
b . C HE CK-T h at the dis
p
layed trace is with in 0.5
d ivision of the center vertical graticule li n e.
c . AD JU ST- H orizontal Centering
R
222 to position
t he trace to th e ce n ter vertical graticule line . See F ig . 5-5
for a
d
j ustment location .
2. Ad just
H
orizontal Gain
α. Set t h e Test switch of the Calibratio n F ixture to
V
ert
or
H
oriz Gai n .
d. Set the time-base unit for auto, internal triggeri n g,
and the swee
p
rate to 10 ns/
d
iv . Ad j ust the time-base
triggeri ng controls for α stable display .
b . Position the display with
t he Cali b ration Fixture
position co ntrol to align the brig ht center trace of the
display with
t h e center vertical graticule li n e. e. C HE C K-For one 10 nanoseco n
d
mar ker per
d
i
v
i-
sion over the center eig h t ma jor graticule divisio ns of the
dis
p
lay (positio n as necessary) .
c . C HE CK-T h at the center 7 traces coinci
d
e with the
respective vertical graticule li nes, one trace per d ivision,
±0 .25 division .
f. AD JU ST-C210 for o ne 10
n
anosecond marker
p
er
d ivisio n over the center eight ma jor graticule divisions of
the d is p lay. Sweep accuracy is±5°/ο overthe entire swee p,
ιτ> σε 8222
exclu
d
ing th e first 30
n s and t he last 10
d
ivisions of the
c235 CENTERING
mag n ified swee p . See Fig . 5-5 for a
d
justment location .
5nS TI M IN G
F
ig . 5-5 . Location ο1 Horizontal Amplifie r adjustments .
d. AD
JU
ST-
H orizontal Gain
R
212 for 6 divisions of
d
eflectio
n over t
h
e ce
n ter 7 vertical graticule li
n
es .
3. A
d
just 10 ns Timing
ΝΟΤΕ
Ad
j
ustment-5440
e.
P
ress
P
O
WER
switc
h
to tur
n
off t
h e Oscillosco
p
e
and i
n
terc
h
ange t
h
e Calibration
F
ixture a
n
d t
h
e time-base
unit in their respective com
p
artments . Pull POWERswitch
ON .
Α 5842 time-base or α time-base having α 10 ns
swee
p
must be used.
α. Set the Calibration F ixture test switch to AUX IN .
b. Connect t h e time-mark generator to the αυχ in
co nn ector of the Calibration F ixture .
c . Set t h e time-mar k generator for 10 nanoseco n d
markers. Set the Calibration F ixture am
p
litude co ntrol so
th e markers are at least five divisions i n amplitu
d
e.
4. Ad just 5 ns Timing
ΝΟΤΕ
T
his step can be performed only with a time-base
unit having α 5 ns swee p rate, suc h as Tektronix
5844 .
α. Press P O WER switch to turn off Oscilloscope and
install ap
p
ro
p
riate time-base unit in the
h
orizontal com-
partment. Pull P OWER switc h ON .
5-9