HP 8753D - Page 506

and
the number
of pages
is determined
by
the
number
of
measurement
points specied
in
the
stimulus
menu.
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LN/MATCH 1
measures
the TRL/LRM
line
or
match
standard
for
PORT
1.
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LN/MATCH
2
measures
the TRL/LRM
line or
match standard
for
PORT
2.
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LO
CONTROL
on OFF
turns the
LO control
mode on
and o
for
frequency
oset.
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LO
MENU
leads
to
the
LO
menu.
Allows
you
to
congure the
external
source
for
frequency
oset.
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LO
SOURCE
ADDRESS
shows
the
HP-IB
address
of
the
LO
source
.
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N
LOAD
denes
the
standard
type
as
a
load
(termination).
Loads
are
assigned
a
terminal
impedance
equal
to
the
system
characteristic
impedance
Z0,
but
delay
and
loss
osets
may
still
be
added.
If
the
load
impedance
is
not
Z0,
use
the
arbitrary
impedance
standard
denition.
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LOAD
NO
OFFSET
initiates
measurement
of
a
calibration
standard
load
without
oset.
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LOAD
OFFSET
initiates
measurement
of
a
calibration
standard
load
with
oset.
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LOAD
SEQ
FROM
DISK
presents
the
load
sequence
from
disk
menu.
Select
the
desired
sequence
and
the
analyzer
will
load
it
from
disk.
4
LOCAL
5
This
key
is
used
to
return
the
analyzer
to
local
(front
panel)
operation
from
remote
(computer
controlled)
operation.
This
key
will
also
abort
a
test
sequence
or
hardcopy
print/plot. In
this
local
mode
,
with
a
controller
still
connected
on HP-IB
,
the
analyzer
can
be
operated
manually
(locally)
from
the
front
panel.
This
is
the
only
front
panel
key
that
is
not
disabled
when
the
analyzer
is
remotely
controlled
over
HP-IB
by
a
computer
.
The
exception to
this is
when
local
lockout
is
in
eect:
this
is
a remote
command that
disables
the
4
LOCAL
5
key
,
making
it
dicult
to interfere
with the
analyzer
while
it
is
under
computer control.
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LOG
FREQ
activates
a
logarithmic
frequency
sweep
mode
.
The
source
is
stepped
in logarithmic
increments
and
the
data
is
displayed
on
a
logarithmic graticule
.
This
is
slower
than
a
continuous
sweep
with
the same
number of
points
,
and
the
entered
sweep
time
may
therefore
be
changed
automatically
.F
or
frequency
spans
of less than two octaves
, the sweep type automatically reverts
to linear sweep
.
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LOG MAG
displays the log magnitude format. This is the standard
Cartesian format used to display magnitude-only measurements
of insertion loss
, return loss
, or absolute power in dB versus
frequency.
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LOG MKR
displays the logarithmic magnitude
value and the phase of the
active marker in Polar or Smith chart format. Magnitude values
are expressed in dB and phase in degrees. This is useful as a
fast method of obtaining a reading of the log magnitude value
without changing to log magnitude format.
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LOOP COUNTER
displays the current value of the loop counter and allows you
to change the value of the loop counter. Enter any number
9-20 Key Denitions