Agilent Technologies 4284A - Page 45

(5) CURSOR
Keys
The
CURSOR k
eys are
used to
mov
e
the
eld
select
cursor
from
eld
to
eld
on
the
LCD
displa
y
page.
When
the
cursor
is
mo
ved
to a
eld, the
eld c
hanges to
an in
verse
video image
of
the
original
eld.
The
cursor can
only
b
e
mo
v
ed
from
eld
to
eld.
(6)
ENTRY
Keys
The
ENTRY
keys
are used
to
en
ter
n
umeric
data
in
to
the
4284A
.
The
ENTR
Y
k
eys
are
comp
osed
of
the
digits
4
0
5
to
4
9
5
,
a
p
erio
d
4
.
5
,
a
min
us
sign
4
-
5
,
4
ENTER
5
,
and
4
BA
CK
SP
A
CE
5
k
eys.
4
ENTER
5
terminates
n
umeric input
data and
enters
the
displa
y
ed
v
alue
on
the
Input
Line
(second
line
from
the
b
ottom
of
the
LCD
screen).
4
BACK
SP
A
CE
5
deletes
one
last
c
haracter
of
the input
value.
(7)
GPIB
Status
Indicators
The
GPIB
status
indicators
consist
of
the
RMT
(remote),
TLK
(talk),
LTN
(listen), and
SRQ
(service
request)
indicators.
These
indicators
are
used
to
sho
w
the
4284A
's GPIB
status when
it is
in
terfaced
to
a
con
troller
via
GPIB.
(8)
4
LCL
5
Key
This
is
the
Lo
cal
(LCL)
key
whic
h
sets
the
4284A
to
lo
cal
(fron
t-panel)
con
trol,
if
it
w
as
in
REMOTE
and
if
the
GPIB
con
troller
had
not
in
v
ok
ed
a
lo
cal
lo
c
k
out.
4
LCL
5
is
the
only
fron
t-panel
k
ey
that is
activ
e
when
the
4284A
is
in
REMOTE
state.
(9)
4
TRIGGER
5
Key
This
is
the
TRIGGER
k
ey
used
to
man
ually
trigger
the
4284A
when
it is
set to
the
Man
ual
T
rigger
mo
de.
(10)
MEMORY
Card
Slot
and UNL
OCK Button
The
MEMOR
Y card
slot is
where y
ou insert
the
memory
cards.
The
UNLOCK
button
is
used
to
eject
a
memory card.
(11) 4
DC BIAS
5 Key
This is
4
DC BIAS
5 used to enable the DC bias output.
4
DC BIAS
5 is a
toggle t
ype switc
h, and the DC BIAS ON/OFF LED indicator is
lo cated ab o
ve 4
DC BIAS
5 .When
4
DC BIAS
5 is set to ON, the DC BIAS
ON/OFF LED indicator
is ON. When
4
DC BIAS
5 is set
to OFF, the
DC BIAS ON/OFF LED indicator is OFF. If
4
DC BIAS
5 is set to OFF,
even though the DC bias is set
to ON according to the LCD displa
y,
the DC bias isn't output.
(12) CONTRAST Control Knob
This knob is used to adjust the LCD's CONTRAST.
Overview 2-3