With
the use
of a
reference marker
,
a
delta
marker
mode
is
available
that
displays
both
the
stimulus
and response
values
of
the
active
marker
relative
to
the
reference
.
Any
of the
ve
markers
or a
xed
point
can
be
designated
as
the
delta
reference
marker
.
If the
delta reference
is
one of
the
ve
markers
,
its
stimulus
value
can
be
controlled
by
the
user
and its
response
value
is the
value
of
the
trace
at
that
stimulus
value
.
If
the
delta
reference
is a
xed marker
,
both
its stimulus
value
and
its
response
value
can
be
set
arbitrarily
anywhere
in
the
display
area
(not
necessarily
on
the
trace).
Markers
can
be
used
to
search
for
the
trace
maximum
or
minimum
point
or
any
other
point
on
the
trace
.
The
ve
markers
can
be
used
together
to
search
for
specied
bandwidth
cuto
points
and
calculate
the
bandwidth
and
Q
values
.
Statistical
analysis
uses
markers
to
provide
a
readout
of
the
mean,
standard
deviation,
and
peak-to-peak
values
of
all
or
part
of
the
trace
.
Basic
marker
operations
are
available
in
the
menus
accessed
from
the
4
MARKER
5
key
.
The
marker
search
and
statistical
functions
,
together
with
the
capability
for
quickly
changing
stimulus
parameters
with
markers
,
are
provided
in
the
menus
accessed
from
the
4
MARKER
F
CTN
5
key
.
Marker
Menu
The
4
MARKER
5
key
provides
access
to
the
marker
menu.
This
menu allows
you to
turn the
display
markers
on
or
o,
to
designate
the
active
marker,
and to
gain access
to
the
delta
marker
menu
and
the
xed
marker
menu.
Delta
Mode
Menu
The
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1
MODE
MENU
softkey
within
the marker
menu
provides
access
to
the
delta
mode
menu.
The
delta
reference
is
shown
on
the
display
as
a
small
triangle
1,
smaller
than
the
inactive
marker
triangles
.
If
one
of
the
markers
is
the
reference
,
the
triangle
appears
next
to
the
marker
number
on
the
trace
.
The
marker
values
displayed
in
this
mode
are
the
stimulus
and
response
values
of
the
active
marker minus
the
reference
marker
.
If
the
active
marker
is
also
designated
as
the
reference
marker
,
the
marker
values
are
zero
.
Fixed
Marker
Menu.
The
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FIXED
MKR
POSTION
softkey
within the
delta mode
menu provides
access
to
the
xed
marker
menu.
This
menu
is
used
to
set
the
position
of
a
xed
reference
marker
,
indicated
on
the
display
by
a
small
triangle
1.
Both
the
stimulus
value
and
the
response
value of
the
xed
marker
can
be
set
arbitrarily
anywhere
in
the
display
area,
and
need
not
be
on
the
trace
.
The
units
are
determined
by
the display
format, the
sweep type
,and
the
marker
type
.
There
are
two
ways to
turn
on
the
xed
marker
.
One
way
is
with
the
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1
REF
=
1 FIXED
MKR
softkey in the delta marker menu. The other is with the
NNNNNNNNNNNNNNNNNNNNNNN
NNN
MKR ZERO
function in the marker
menu, which puts a xed reference marker at the present active marker position and makes
the marker stimulus and response values at that position equal to zero
.
The softkeys in this menu make the values of the xed marker the active function. The marker
readings in the top right corner of the graticule
are the stimulus and response values of the
active marker minus the xed reference marker
. Also displayed
in the top right corner is the
notation
1REF=1
.
The stimulus value, response value, and auxiliary response value (the second part of a complex
data pair) can be individually examined and changed. This allows active marker readings that
are relative in amplitude yet absolute in frequency, or any combination of relative/absolute
readouts.Following a
NNNNNNNNNNNNNNNNNNNNNNNNNN
MKR ZERO
operation, this menu can be used to reset any of the xed
marker values to absolute zero for absolute readings of the subsequent active marker values.
6-48 Application and Operation Concepts
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