4263B
Applying
the
DC
Bias
Press
to
apply
the
DC
bias
.
The
DC
Bias
ON/OFF
indicator
is
ON.
(Press
again
to
turn
OFF
the
DC
bias
.
The
DC
Bias
ON/OFF
indicator
is
OFF
.)
Making
a
Measurement
In
the
internal
trigger
mode|
The
4263B
makes
continuous
free-running
measurements
.
In
the
manual
trigger
mode|
Press
when
you
want
to
trigger
a
measurement.
In
the
external
trigger
mode|
Connect
the
external
trigger
source
to
the
EXT
TRIGGER
terminal
on
the
4263B 's
rear
panel,
and
apply
a
TTL
level
trigger
signal
to
trigger
a
measurement.
(F
or
details
,
see
Operation
Manual
.)
Note
that
it
must
be
set
to
the
external
trigger
mode
to
trigger
from
an
external
handler
or
the
16064B
LED
Display/Trigger
Box.
V
erication
of
Current
Settings
Press
.
The
display
on
the
right
side
of
the
LCD
changes
,
and
each
time
is
pressed,
the
next
current
setting
is
displayed.
1.
T
est
signal
frequency
and
T
est
signal
level
2.
DC
bias
setting
and
A
veraging
rate
3.
Trigger
delay
time
and
Cable
length
4.
Comparator
limits
for
primary
parameter
5.
Comparator
limits
for
secondary
parameter
6.
Level
monitor
value
Operating
the
4263B
2-17
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