HP 8753D - Page 233

Modifying Calibration
Kit Standards
Note
Numerical
data
for
most
Hewlett-P
ackard calibration
kits is
provided in
the
calibration
kit
manuals
.
The
following
section
provides
a
summary
of
the
information
in the
8510-5A application
note,
as
well
as
HP
8753D
menu-specic
information.
F
or
a
detailed
description of
the menus
and
softkeys
located
in
this
section,
as
well
as
information
about
when
user-dened calibration
kits
should
be
used,
refer
to
Chapter
6,
\Application
and
Operation
Concepts
."
Denitions
The following
are denitions
of terms:
A \standard"
(represented by
a number
1-8)
is
a
specic
,
well-dened,
physical
device
used
to determine
systematic errors
.F
or
example
,
standard
1
is
a
short
in
the
3.5
mm
calibration
kit.
A
standard
\type"
is
one
of
ve
basic
types
that
dene
the
form
or
structure
of
the
model
to
be
used
with
that
standard
(short,
open,
load,
delay/thru, and
arbitrary impedance);
standard
1
is
of
the
type
short
in
the
3.5 mm
calibration kit.
Standard
\coecients"
are
numerical
characteristics
of
the
standards
used
in
the model
selected.
F
or example
, the
oset
delay
of
the
short
is
32
ps
in
the
3.5
mm
calibration
kit.
A
standard
\class"
is
a grouping
of
one
or
more
standards
that
determines
which
of
the
eight
standards
are
used
at
each step
of
the
calibration.
F
or
example
,
standard
number
2
makes
up
the
S
11
A
reection
class
.
Outline
of
Standard
Modication
The
following
steps
are
used
to
modify
or
dene
user
kit
standard
models
,
contained in
the
analyzer
memory
.
It
is
not
possible
to
alter
the
built-in
calibration
kits;
all
modications will
be
saved
in
the
user
kit.
1.
T
o
modify
a
cal
kit, rst
select the
predened kit
to
be
modied.
This
is
not
necessary
for
dening
a
new
cal
kit.
2.
Dene
the
standards
.
F
or each
standard, dene
which \type"
of standard
it
is
and
its
electrical
characteristics
.
3.
Specify
the
class where
the
standard
is
to
be
assigned.
4. Store the modied cal kit.
Modifying Standards
1.
Press 4
CAL
5
N
NNNNNNNNNNNNNNNNNNNNNN
CAL KIT
NNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNN
SELECT CAL KIT
.
2. Select the softkey that corresponds to the kit you want to modify
.
3.
Press
N
NNNNNNNNNNNNNNNNNNN
RETURN
NNNNNNNNNNNNNNNNNNNN
MODIFY
NNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
N
DEFINE STANDARD .
4. Enter the number of the standard that you want to modify, followed by 4
x1
5 . Refer to your
calibration kit manual for the numbers of the specic standards in your kit. For example,
to select a short press 4
1
54
x1
5 .
5-26 Optimizing Measurement Results