Tektronix 5440 Instruction Manual page 8

O
p
erating Information-5440
F
OC US Control
I NT EN SITY Co ntrol
P rovi des a
dju
st
m
e
n
t to
Co
n
trols
d
isplay brig
h
t-
obtai
n
α well-defined
d
is-
ness .
play .
ΕΧΤ I
N
T
EN
SITY I
NPU
T
Con
n
ector
Per
m
its a
pp
lication of Z-
axis
signals to t
h
e C
R
T
(DC couple d ) . Positive-
going signal increases i
n
ten-
sity .
BEAM F I
N
D
ER
Pu s h button
Br
ings beam on-screen;
limits intensifie d display to
area insi de graticule.
Fig . 1-1.
Fr
ont- an
d
rea
r
-panel cont
r
ols an
d
connecto
r
s.
RE
ADO
U
T I
N
T
EN
S
Co
n
t
r
ol
Co
n trols brig
h
t
n
ess of t
h
e
rea
d
out
portio
n
of t
h
e
C
R
T display . In
t
h
e f
u
lly
co
un tercloc
k
wise
p
ositio
n
,
t
h e readout system is in-
operative.
G
R
AT I
LLUM
Co
n
trol
Controls Graticule illumi-
nation .
PO
WER
Switc
h
Tu
rns i
n
str
u
ment
p
ower on
or off .
CA
L
I
BR
ATO
R L
oop
Pr
ovides positive-going
acc
u
rate 400-millivolt and
4-
m
illia
mp
ere s
qu
arewave
at α fre
qu
ency of twice t
h
e
li
n
e fre
qu
e
n
cy for cali
b
ra-
tio
n
and pro
b
e compensa-
tio
n
.
2139-02