Re Ado U T Syst Em - Tektronix 5440 Instruction Manual

Ad
j
ustme
n
t-5440
If t
h
e
R
eadout System was d eleted from t
h
e instru-
ment (O
p
tion 1), omit this section of t
h
e procedure .
It is not
n
ecessary to install any plug-ins to p
erform t
h
is
p roce d ure . W it
h
p
lug-ins i
n
stalled and Q1052 removed,
ran
d
om c
h
aracters will a pp ear; wit
h p
lug-in and Q1052
removed, all zeros will a
pp ear .
1 . Ad
j
ust Vertical S p aci
n
g
RE
ADO
U
T SYST
EM
3 . Ad
j
ust C
h
aracter Scan
ΝΟΤΕ
α .
R emove Q1052 from its soc
k
et on t
h
e R eadout
board . See
F
ig . 5-6 Α for location .
b . Pull t
h
e P O
WER switc
h
ON
a n
d set t
h
e
RE
ADO
U
T
control for visible c
h aracters .
c . C
HE
C
K
-Crt display for two rows of zeros, 40 zeros
to α row wit
h
no overla p . T
h
e two rows of zeros s
h
ould be
locate d vertically in t
h
e middle of t
h e to p an d bottom
divisions of t
h
e graticule . See
F
ig . 5-6 Β .
d . AD
JU
ST-
V
ertical Spaci
n
g R 1118 to
p
osition t
h e
top row of readout c
h
aracters to t
h
e mi d dle of t
h
e top
graticule
d
ivisio
n
. T
h
en a
dj
ust V ertical Ce
n
teri
n
g
R
135
(located on vertical circuit board) so t
h
e bottom row of
rea d out c
h
aracters is i
n
t
h
e middle of t
h
e bottom graticule
division . Some i
n
teractio
n
will occur betwee
n adj ustme
n
t
of R
1118 a
n
d R 135 .
R
e
p
eat until correct read out c
h
aracter
locatio
n
is ac
h ieve
d
. See
F
ig . 5-6A and 5-613 .
2 . A d
j
ust H orizontal
P
ositioning
α . C
HE
C
K
-T
h
at t
h
e first a
nd
last c
h
aracters of bot
h
rows of zeros are wit
h
i
n
t
h
e gratic
u le area . See
F
ig . 5-6 Β .
b . AD
JU
ST-
H
orizontal Positio
n
ing
R
1110 to p
osition
bot h rows of zeros so t
h
e first an d last c
h
aracters are
wit
h
i
n
t
h
e graticule area . See
F ig . 5-6 Β for correct
p
ositio
n
i
n
g of t
h
e rea
d
out
d
is
p
lay .
α . C
HE C K -Displaye d
ch
aracters for com
p
lete
n ess
wit
h
out overscanni
n
g (oversca
nn
i
n
g causes α brig
h
t dot
w
h ere traces overlap) .
b . AD
JU
ST-C
h aracter Sca
n R
1006 for fully scanned
ch
aracters wit
h
o
u
t oversca
nn ing . See
F
ig . 5-6A and 5-613 .
c . P ress P O
WER
switc
h
to tur
n
off Oscilloscope .
R
eplace Q1052 to its soc
k
et . T
h is com
p
letes t
h
e ad
j
ust-
me
n
t proce d ure .
R
1118
VER
TICA
L
SPACING
R
1110
Q1052 R
1006
H
O
R
IZO
N
TA
L
CH
A
R
ACT
ER
( Α )
P
OSITIO
N
I
N
G
SCA
N
ιιινι ιιιι
m
ιιι m ιιι ιιιιίιιιιί ι 'ιίιιιιιιι
NONE
MMMMMENEEN
NNEEMENNEW
NEEMENEEN
NEEMENNE
ιιι ιιιιι ιιιιιιιιιι ιιιιιιιιιι ιιιι
ιιιιι
2139-11
F
ig . 5-6 . ( Α )
L
ocatio
n
s of
R
ea
d
out Ad
j
ustme
n
t, 01052, ( Β )
R
ea
d
out d isplay wit
h
01052 removed (wit
h p
lug-i
n
s removed) .