HP 8753D - Page 316

If
the format
is changed
while a
xed
marker
is
on,
the
xed
marker
values
become
invalid.
F
or example
,
if
the
value
oset
is
set
to
10
dB
with
alog
magnitude format,
and the
format
is
then changed
to
phase
,
the
value
oset
becomes
10
degrees
.
However
,in
polar and
Smith
chart
formats,
the
specied
values
remain
consistent
between
dierent
marker
types
for
those
formats
. Thus
an
R+jX
marker
set
on
a
Smith
chart
format
will
retain
the
equivalent
values if
it
is changed
to
any
of
the
other
Smith
chart
markers
.
Marker
Function
Menu
The
4
MARKER
F
CTN
5
key
provides
access
to
the
marker
function
menu.
This
menu
provides
softkeys
that
use
markers
to
quickly
modify
certain
measurement
parameters
without
going
through
the
usual
key
sequence
.
In
addition,
it
provides
access
to
two
additional
menus
used
for
searching
the
trace
and
for
statistical
analysis
.
The
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MARKER
!
functions
change
certain
stimulus
and
response
parameters
to
make
them
equal
to the
current active
marker
value
.
Use
the
knob
or
the
numeric
keypad
to
move
the
marker
to the
desired position
on
the
trace
,
and
press
the
appropriate
softkey
to
set
the
specied
parameter to
that
trace
value
.
When
the
values
have
been
changed,
the
marker
can
again
be
moved
within
the
range of
the
new
parameters
.
Marker
Search
Menu
The
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MKR
SEARCH
[
]
softkey
within
the marker
function menu
provides access
to the
marker
search
menu.
This
menu
is
used
to search
the trace
for
a
specic
amplitude-related
point,
and place
the
marker
on
that
point.
The
capability
of
searching
for
a
specied
bandwidth
is also
provided. Tracking
is
available
for
a
continuous
sweep-to-sweep
search.
If
there
is no
occurrence
of
a
specied
value
or
bandwidth,
the
message
TARGET
VALUE
NOT
FOUND
is
displayed.
T
arget Menu.
The
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TARGET
softkey within
the
marker
search
menu
provides
access
to
the
target menu.
This
menu
lets
you
place
the
marker
at
a
specied
target
response
value
on
the
trace
,
and
provides
search
right
and
search
left
options
.
If
there
is
no
occurrence
of the
specied
value
,
the
message
TARGET
VALUE
NOT
FOUND
is
displayed.
Marker
Mode
Menu
The
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MKR
MODE
MENU
softkey
within
the
marker
function
menu
provides
access
to
the
marker
mode
menu.This
menu
provides
dierent
marker
modes
and
leads to
the following
two menus:
P
olar
Marker
Menu.
This
menu
is
used
only with
a polar
display format,
selectable using
the
4
F
ORMA
T
5 key
.In
apolar
format, the
magnitude at
the center
of
the
circle
is
zero
and
the
outer
circle
is
the
full
scale
value
set
in
the
scale
reference menu.
Phase
is
measured
as
the
angle
counterclockwise from 0

at the positive x-axis
. The analyzer automatically calculates dierent
mathematical forms of the marker magnitude and phase values
, selected using the softkeys in
this menu. Marker frequency is displayed in addition to other values regardless of the selection
of marker
type.
Smith Marker Menu.
This menu is used only with a Smith chart format, selected from
the format menu. The
analyzer automatically calculates dierent mathematical forms of
the marker magnitude and
phase values
, selected using the softkeys in this menu. Marker
frequency is displayed in addition
to other values for all marker types
.
Application and Operation Concepts 6-49