HP 8753D - Page 348

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OFFSET
LOSS allows
you to
specify energy
loss,
due to
skin eect,
along
a
one-way
length
of
coax
oset.
The
value
of
loss
is
entered as
ohms/nanosecond (or
Giga ohms/second)
at 1
GHz.
(Such
losses
are
negligible
in
waveguide
,
so enter
0as
the loss
oset.)
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OFFSET
Z0
allows
you
to
specify
the
characteristic
impedance
of
the
coax
oset. (Note:
This
is not
the impedance
of the
standard itself.)
For
waveguide
,
the
oset
impedance
as
well
as the
system Z0
must always
be set
to
1.
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MINIMUM
FREQUENCY
allows you
to dene
the lowest
frequency
at
which
the
standard
can
be
used
during
measurement
calibration.
In
waveguide
,
this
must be
the lower
cuto
frequency
of
the
standard,
so
that
the
analyzer
can
calculate
dispersive eects
correctly (see
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OFFSET
DELAY
above).
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MAXIMUM
FREQUENCY
allows
you
to
dene
the
highest
frequency
at which
the standard
can
be used
during measurement
calibration.
In
waveguide
,
this
is
normally
the
upper
cuto
frequency
of
the
standard.
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COAX
denes
the
standard
(and
the
oset)
as
coaxial.
This
causes
the
analyzer
to
assume
linear
phase
response
in
any
osets
.
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WAVEGUIDE
denes
the
standard
(and
the
oset)
as rectangular
waveguide.
This causes
the
analyzer
to assume
a dispersive
delay (see
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OFFSET
DELAY above).
Label
Standard
Menu
This
menu
allows
you
to
label
(reference)
individual
standards
during
the menu-driven
measurement
calibration
sequence
.
The
labels
are
user-denable
using
a
character
set
shown
on
the
display
that
includes
letters
,
numbers
,
and
some
symbols
,and
they
may
be
up
to
ten
characters
long.
The
analyzer
will
prompt
you
to
connect
standards
using
these
labels
,so
they
should
be
meaningful
to
you,
and
distinct for
each
standard.
By
convention,
when
sexed
connector
standards
are labeled
male
(m)
or
female
(f),
the
designation
refers
to
the
test
port
connector sex,
not the
connector
sex
of
the
standard.
Specify
Class
Menu
Once a
standard has
been
dened,
it
must
be
assigned
to
a
standard
\class
."
This
is
a
group
of
from one
to seven
standards
that
is
required
to
calibrate
for
a
single
error
term.
The
standards
within a
single class
can be
assigned
to
the
locations
listed
in
T
able
6-5
according
to
their
standard reference
numbers.
A class
often
consists
of
a
single
standard,
but
may
be
composed
of
more than
one standard
if
band-limited standards are used. F
or example
, if there were two load standards
0 axedload
for low frequencies
, and a sliding load for high frequencies
0 then that class would have two
standards.
Application and Operation Concepts 6-81