Agilent Technologies 8504B - Running Guided Setups and Calibrations

FINAL TRIM SIZE : 7.5 in x 9.0 in
Running
Guided
Setups
and Calibrations
This
section shows
you
how
to
perform
guided
setups
for
pigtailed
or
nonpigtailed
devices.
(A
pigtail
is
a
length
of
ber-optic
cable
which
usually
terminates
in a
connector
.)
Guided
setups
can
be
started
using
either
the
4
PRESET
5
or 4
SYSTEM
5
keys.
Using
the
4
PRESET
5
key has
the
advantage
of
setting
the instrument
to
a
known
state
.
During
a
guided
calibration
,
a
polar
vector
display
shows
polarization
balance
between
two
receivers
in
the
instrument.
After
manually
adjusting
the
polarization
balance
using
the
front-panel
knobs
,
the
precision
reectometer mathematically
compensates
for
any
polarization
imbalance
between
the
TEST PORT
cable and
the REFERENCE
EXTENSION paths
.
T
o
complete the
calibration,
a
standard
cable
of
known
reectance
is
used
to
calibrate the
magnitude
.
The
displayed
response
is
scaled
to
match
the
value
specied for
the
standard
in
percentage
of
reectance
.
2-6
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