Agilent Technologies 8504B - Page 83

FINAL TRIM SIZE : 7.5 in x 9.0 in
P
erforming
Measurements
Setting the
Measurement
Range
The
sweep
can
be
stopped
Normally
,the
precision reectometer
sweeps
the
measurement
range
continually
.
Single sweeps
are available
by pressing
4
MEAS
5
N
N
N
N
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NN
N
N
N
N
N
N
N
N
N
N
SINGLE
.
Each
time
this
softkey
is
pressed,
one
sweep
is
taken
and
then the
sweep stops
.
Y
ou
also
can
force
any
sweep
to
restart
at
the beginning
regardless of
the
current
sweep
position.
This
is
especially
valuable
in
wide
measurement
spans
where
sweeps
take
a
few
seconds to
complete.
To
restart a
sweep
,
press
4
MEAS
5
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
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N
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N
N
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N
N
N
N
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N
N
N
MEASURE
RESTART
.
External
sources
can
be
used
In
addition
to
the
internal
1300
nm
and
1550
nm
sources,
you can
connect an
external
source
for
the
measurements
.
The
external
source
input
is provided
as
a
convenience
for
users
with
very
advanced
applications
.
It
is
not
meant
for
the
typical
user
.
When
using
an
external
source
,
normal
calibration
and
correction
features
are
not applied
to the
measurement data.
Refer to
\T
o
calibrate
for
an
external source
"in
Chapter 2
to learn
how
to
calibrate
the
precision
reectometer
for
use
with
an external
source.
T
o
select
the
source wavelength
1.
Press
4
MENU
5
.
2.
Press
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
1300
nm
or
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
1550
nm
to
select
the
wavelength.
The
N
N
N
N
N
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
EXTERNAL
selection turns
o the
internal sources
.The
external
source
input
is
provided
as
a
convenience
for
users
with
very
advanced
applications
.
Note
that
normal
calibration
and
correction
features
are
not
available
with
an
external
source
.
Use
the
entry
keys
to enter
the
wavelength
of
the
external
source
.
3-6
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