HP 8753D - Measurement Error-Correction

Measurement Error-Correction
The
accuracy
of
network
analysis is
greatly inuenced
by factors
external to
the network
analyzer
.
Components
of
the
measurement
setup,
such as
interconnecting cables
and adapters
,
introduce
variations
in
magnitude
and
phase
that can
mask the
actual response
of the
device
under
test.
Error-correction
is
an
accuracy
enhancement procedure
that removes
systematic errors
(repeatable
measurement
variations)
in
the
test
setup.
The analyzer
measures known
standard
devices
,
and
uses
the
results
of these
measurements to
characterize the
system.
Conditions
Where Error-Correction
is Suggested
Measurement
accuracy and
system characteristics
can
be
aected
by
the
following
factors:
A
dapting
to
a
dierent
connector
type
or
impedance
.
Connecting
a
cable
between
the
test
device
and
an
analyzer
test
port.
Connecting
any
attenuator
or
other
such
device
on
the
input
or
output
of
the
test
device
.
If
your test
setup
meets
any
of
the
conditions
above
,
the
following
system
characteristics
may
be
aected:
amplitude at
device input
frequency response
accuracy
directivity
crosstalk (isolation)
source match
load
match
Types
of
Error-Correction
Several
types
of
error
correction
are
available
that
remove
from
one
to
twelve
systematic
errors
.
The
full
2-port
correction
eectively
removes
all
twelve
correctable
systematic
errors
.
Some
measurements
do
not
require
correction
for
all
twelve
errors
.
The
following
table
explains
each
correction
and
its
uses
.
5-4 Optimizing Measurement Results