Agilent Technologies 4395A - Page 424

Calibration
for
Network
Measurement
The
number of
standard classes
required
depends
on
the
type
of
calibration
being
performed,
and
is identical
to
the
number
of
error
terms
corrected.
(Examples:
A
response
cal
requires
only
one class
,
and
the
standards
for
that
class
may
include
an
OPEN,
or SHORT
,or
THRU.
A
1-port
cal requires
three
classes
.
A
full
2-port
cal
requires
10
classes
,
not including
two for
isolation.)
The
number of
standards
that
can
be
assigned
to
a
given
class
may
vary
from none
(class not
used)
to
one
(simplest
class)
to
seven.
When
a
certain
class
of
standards
is
required during
calibration,
the
analyzer
will
display
the
labels
for
all
the
standards
in
that
class
(except when
the
class
consists
of
a
single
standard).
This
does
not,
however
,
mean
that
all standards
in a
class
must
be
measured
during
calibration.
Only
a
single
standard
per
class
is
required.
Note
that
it
is
often
simpler
to
keep
the
number
of
standards
per
class
to
the bare
minimum needed
(often
one)
to
avoid
confusion
during
calibration.
Standards
are
assigned
to
a
class
simply
by
entering
the
standard's
reference
number
(established
while
dening
a
standard)
under
a
particular
class
.
Each
class
can
be
given
a
user-denable
label.
Note
The
class
assignments
table
can
be
displayed
on screen
and
printed
using
4
COPY
5
function.
Note
Agilent
T
echnologies
strongly
recommends
that
you
read
application note
8510-5A
before
attempting
to
view
or
modify
calibration
standard denitions
.
The
part
number
of
this
application
note
is
5956-4352. Although
the
application
note
is written
for
the
8510
family
of
network
analyzers
,
it
also
applies
to
the 4395A
.
A-48 Basic Measurement Theory