HP 8753D - Page 308

Memory
Math
Functions
Two
trace
math
operations
are
implemented:
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
NN
NN
N
DATA/MEM
(data/memory)
N
N
N
N
N
NN
NN
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
DATA
0
MEM
(data 0
memory)
(Note
that
normalization
is
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
DATA/MEM
not
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
DATA
0
MEM
.)
Memory traces
are saved
and recalled
and
trace
math
is
done
immediately
after
error-correction.
This
means
that
any
data processing
done
after
error-correction,
including
parameter
conversion,
time
domain
transformation
(Option
010),
scaling,
etc
.,
can
be
performed
on
the
memory
trace
.Y
ou can
also use
trace
math
as
a
simple
means
of
error-correction,
although
that
is
not
its
main
purpose.
All
data
processing
operations
that
occur
after
trace
math,
except
smoothing
and
gating, are
identical
for
the
data
trace
and
the
memory
trace.
If smoothing
or gating
is on
when
a
memory
trace
is
saved,
this
state
is
maintained
regardless
of the
data trace
smoothing or
gating status
.
If
a
memory
trace
is
saved
with
gating
or smoothing
on, these
features can
be turned
on
or
o
in
the
memory-only
display
mode
.
The
actual
memory
for
storing
a
memory
trace
is
allocated
only
as
needed.
The
memory
trace
is
cleared
on
instrument preset,
power on,
or instrument
state
recall.
If
sweep
mode
or sweep
range is
dierent between
the data
and
memory
traces
,
trace
math
is
allowed,
and
no
warning
message
is displayed.
If the
number
of
points
in
the
two
traces
is
dierent,
the
memory
trace
is
not displayed
nor rescaled.
However
,
if
the
number
of
points
for
the
data
trace
is
changed
back to
the number
of
points
in
the
memory
,
the
memory
trace
can
then
be
displayed.
If trace
math
or
display
memory
is
requested
and
no
memory
trace
exists
,
the
message
CAUTION: NO
VALID
MEMORY
TRACE
is
displayed.
Adjusting
the Colors
of
the
Display
The
N
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
ADJUST
DISPLAY
softkey
provides
access
to
the
adjust
display
menu.
The
following
softkeys
are
located
within
this
menu:
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
INTENSITY
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
N
BACKGROUND
INTENSITY
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
NN
NN
NN
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
NN
MODIFY
COLORS
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNN
DEFAULT COLORS
NNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNN
BLANK DISPLAY
NNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNN
SAVE COLORS
NNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNN
RECALL COLORS
Setting Display Intensity
To adjust the intensity of the display, press
NNNNNNNNNNNNNNNNNNNNNNNNNNNNN
INTENSITY and rotate the front panel knob, use
the 4
*
54
+
5 keys, or use the numerical keypad to set the intensity value between 50 and 100
percent. Lowering the intensity may prolong the life of the LCD.
Application and Operation Concepts 6-41