HP 8753D - Page 235

Saving
the modied
calibration constants
If
you made
modications
to
any
of
the
standard
denitions
,
follow
the
remaining
steps in
this
procedure
to assign
a
kit
label,
and
store
them
in
the
non-volatile
memory
.
The new
set of
standard denitions
will be
available under
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N
USER KIT
until you
save another
user kit.
13.
Press 4
CAL
5
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CAL KIT
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MODIFY
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LABEL KIT
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ERASE TITLE
.Use
the
front
panel
knob
to
move
the
pointer
to
a
character
and
press
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SELECT
LETTER
.
Note
To
enter titles
,
you
may
also
use
the
optional
external
keyboard.
14.
Press
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DONE
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KIT
DONE
(MODIFIED)
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SAVE
USER
KIT
.
Note
Y
ou
may
also
save
the
user
kit
to
disk,
by
selecting
the
particular
kit at
the
time
you
save
a
measurement
result.
Modifying
TRL Standards
In
order to
use the
TRL
technique
,
the
calibration
standards
characteristics
must
be
entered
into
the analyzer's
user
dened
calibration
kit.
This
example procedure
shows
you
how
to
dene
a
calibration
kit
to
utilize
a
set
of
TRL
(THRU
,
REFLECT
,
LINE)
standards
.
This
example
TRL
kit
contains
the
following:
zero
length
THRU
\ush"
short
for
the
REFLECT
standard
(0
second
oset)
50
ohm
transmission
line
with
80
ps
of
oset
delay
for
the
LINE
Note
Hewlett-P
ackard
strongly
recommends
that
you
read
product
note
8510-8A
before
you
attempt
to
modify
the
standard
denitions
.
The
part
number
of
this
product
note
is
5091-3645E.
Although
the
product
note
was
written
for
the
HP
8510
family
of
network
analyzers
,
it
also
applies
to
the
HP 8753D
.
F
or
a
discussion
on
TRL calibration,
refer to
\TRL/LRM Calibration"
in
Chapter
6,
\Application
and
Operation
Concepts."
Modify
the
Standard
Denitions
1. Press
the following keys to start modifying the standard denitions:
4
PRESET
5
4
CAL
5
NNNNNNNNNNNNN
NNNNNNNNNN
CAL KIT
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NNNNNNN
MODIFY
NNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNN
DEFINE STANDARD
2. T
o select a short, press
4
1
54
x1
5 . (In this example the REFLECT standard is a SHORT
.)
3. Press the following keys:
NNNNNNNNNNNNN
NNNN
SHORT
NNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNN
SPECIFY OFFSET
NNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
OFFSET DELAY
4
0
54
x1
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
STD OFFSET DONE
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
STD DONE (DEFINED)
5-28 Optimizing Measurement Results