Calibratio N Ch Ec K; R Eadout; Beam F Inder; Extern Al Inte Nsity Input - Tektronix 5440 Instruction Manual

Operating I
n
formatio
n
-5440
4 . Advance t
h e I
N
T
EN
SITY control u
n
til t
h
e trace is at 14 . Set t
h
e time-
b
ase unit for magnifie
d
o
p
eration .
t
h e d esired viewing level . T
h
e trace s
h oul d
a
p
p
ear near t
h
e N otice t
h at t
h
e rea
d
out d is p lay c
h
a
n
ges to indicate t
h
e
graticule center .
correct magnified sweep rate . If α readout-co
d
ed 10 Χ
probe is available for use wit
h
t
h
e vertical u
n
it, install it on
t
h
e i
n p ut co n nector of t
h e vertical p lug-in . N otice t
h
at t
h
e
5 . Connect a 1 Χ p robe, or α test lea d from t
h
e amplifier d
eflection factor i
n
dicate
d
by t
h
e readout is increased by
p lug-i
n
i
n
put co
nn ector to t
h
e CA
L
I
BR
ATO
R
loop . 10 times w
h
en t
h e probe is a dd ed . R etur
n
t
h e time-base
unitto normal sweep op eration an d disco
nn
ectt
h
e p robe .
6 . Tu
r
n t
h e M ain Trig L evel control cloc
k
wise u
n
til α
stable d isplay is obtaine
d . Ad
j
ust t
h
e vertical an
d h
orizo
n
- 15 . N otice t
h at t
h e read out from α p articular p lug-in
tal
P
osition co
n trols so t
h
at t
h e display is centere d occupies α
sp ecific locatio
n
on t
h e d is p lay area . If eit
h
er of
vertically and starts at t
h e left edge of t
h
e graticule . t
h evertical p lug-in units is α dual-trace u
n
it, notice t
h
at t
h
e
rea
d
out for C
h
a
n nel 2 a pp ears wit
h
i
n
t
h
e lower division of
t
h
e crt below t
h e rea d out for C
h
a
nn
el 1 .
7 . A
dj
ust t
h
e
F
OC
U S control for α
sh
ar
p
, well-define
d
dis p lay over t
h
e e
n tire trace le
n
gt
h
.
8 . Discon
n ect t h e input sig
n
al a
n
d position t
h e trace
vertically so t
h
at it coi
n
cides wit
h
t
h
e ce
n ter
h
orizo
n
tal line
of t
h
e graticule .
9 . If t
h e trace is not parallel wit
h th
e center
h
orizo
n
tal
line, see Trace Alignment A d
j
ustme
n
t i
n th is section .
10 . R otate t
h
e G
R
AT I
LLUM
control t
h
roug
h out its
range and notice t
h
at t
h e graticule lines are illuminate d as
t
h
e control is tur
n
ed cloc
k wise . Set t
h
e control so
graticule lines are illumi
n
ated as desire
d
.
Calibration C
h
ec
k
11 . M ove t
h e trace two d ivisions below graticulecenter
a
n d reconnect t
h
e calibrator sig
n
al to t
h
e am
p
lifier p lug-in
in
p
ut connector .
12 . T
h
e dis
p
lay s
h ould be four d ivisio
n
s in am
p
litu d e
wit
h
six complete cycles (five complete cycles for50-
h
ertz
li
n
e fre
q
ue
n
cy) s
h
ow
n h orizontally . An i
n
correct d isplay
in
d
icates t
h
at t
h e oscillosoc p e mai
n
frame or
p
lug-ins
nee d to be recalibrate
d
.
B eam F inder
16 . M ove t
h e display off-screen wit
h
t
h
e vertical
p osition co
n
trol .
17 .
P
us
h
t
h
e BEAM
F
I
N
D
ER
button and observe t
h
at
t
h e d is p lay compresses i
n
to t
h
e scree
n
area . R epositio
n
t
h
e d is
p
lay to screen ce
n ter an d release t
h
e BEAM
F
I
N
D
ER
button .
E xternal Inte
n
sity In p ut
18 . Co
nn ect α 5 volt, 1
kH
z si
n
e-wave or s
q
uare-wave
signal to t
h
e ΕΧΤ I
N
T
EN
SITY I
NPU T connector on t
h
e
rear
p
anel . Also,
u
se t
h
e sig
n al to externally trigger t
h
e
time-base p lug-i
n
.
19 . Slowly rotate t
h
e I
N
T
EN
SITY co
n
trol counter-
cloc
k wise until t
h
e trace appears to be α series of dimmed
an
d brig
h
te
n
ed segme
n
ts . T
h
e brig
h
te
n
e d segments
correspo
n
d wit
h t h
e to
p
s of t
h e calibrator squarewaves .
G ENER
A
L
O
PER
ATI
N
G I
NF
O
RM
ATIO
N
Display F ocus
R eadout
If α well-defined dis p lay cannot be obtai
n
ed wit
h
t
h
e
13 . Turn t
h
e
RE
ADO
U T I N T EN S control cloc
k
wise F OC
U
S co
n trol, even at low inte
n
sity setti
n
gs, a d
j
ustme
n
t
u
n
til an al p
h
anumeric dis p lay is visible wit
h
i
n th
e to
p
or
of t
h
e internal astigmatism co
n
trol may be require d .
bottom divisio
n
of t
h
e crt (reset t
h
e
F
OC
U
S a
dj
ustme
n
t if
n
ecessary for best d efi
n
itio
n
of t
h
e readout) . C
h
a
n
ge t
h
e
V
olts/Div switc
h
of t
h
e am
p lifier p lug-in t
h
at is selecte
d
for To c
h
ec
k
for proper setting of t
h e Astig control, slowly
dis
p
lay . N otice t
h
at t
h
e readout p ortio
n
of t
h
e d isplay
tur
n
t
h
e
F
OC
U
S control t
h
roug
h
t
h
e optim
u
m setting wit
h
ch
anges as t
h
e deflection factor is c
h
anged .
L
i
k
ewise,
α signal d isplaye d on t
h
e crt scree
n
. If t
h
e Astig co
n
trol is
c
h
ange t
h
e Sec/Div switc
h
of t
h
e time-base u
n it t
h
at is
correctly set, t
h
e vertical and
h
orizontal p ortions of t
h
e
selecte d for
d
is
p
lay . N otice t
h
at t
h
e rea d out dis
p
lay fort
h
e
trace will come into s
h
ar p est focus at t
h
e same position of
time-base
u
nit c
h
anges also as t
h
e sweep rate is c
h
ange d . t
h
e
F
OC
U
S co
n
trol .