Data
Processing
Absolute
Squared
(ABS
2
)
This
calculates
the
power
of
the
spectrum.
Video
A
veraging
Video
A
veraging
is
one
of the
noise reduction
techniques.
The video
bandwidth can
be selected
to
be
RBW/1,
RBW/3,
RBW/10,
RBW/100,
or
RBW/300.
Detection
This
detects
the
value
of
a
given
display
point
in one
of three
modes: positive
, negative
,
and
sample
.
F
or
more information,
see \Detection
Modes" under
the heading
\Network
Measurement
Basics"
in
this
chapter
.
Attenuator
A
djustment
This
adjustment
corrects
the
value
to
what
it was
before being
attenuated.
A
veraging
Refer
to
\A
veraging"
under
\Data
Processing
for
Network
Measurement"
in
this chapter
.
Frequency
Characteristics Level
Correction
This
process
digitally
corrects
for
frequency
response
errors
in
the
analog
down-conversion
path.
Raw
Data
Arrays
These
arrays
store
the
results
of
all
the
data
produced
by
the
peak
detector.
These
arrays
are
directly
accessible
via
GPIB
or
by
using
the
internal
disk
drive
or
the memory
disk.
In
spectrum
analyzer
mode
,
row
data
arrays
hold
only
the
real
number
part
of
values.
Memory
Arrays
If
the
data-to-memory
operation
is
performed
(using
the
N
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N
N
N
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N
NN
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DATA
!
MEMORY
softkey),
the
data
arrays
are
copied
into
the
memory
arrays
(data
trace
arrays are
also copied
into the
memory
trace
arrays
at
same
time).
These
arrays
are
accessible
using
the
internal disk
drive or
the
memory
disk.
When
accessed
via
GPIB
,
these
arrays
are
read-only
.are
also output
via GPIB
,
but
data
cannot
be
input
into
them
via
GPIB
.
If
memory
is
displayed, the
data from
the memory
arrays goes
through
the
same
data
processing
ow path
as the
data from
the data
arrays.
F
ormat/Unit conversion
This converts
the measured values (dB value) to other unit (dBV
,dB
V, watt, an d volt). When
noise measurement is selected, this divides measured values by the equivalent noise
bandwidth
to measure noise level directly
.
Data Hold
Refer to \Data Hold" under \Data Processing for Network Measurement" in this chapter.
Data Math
Refer to \Data Math" under \Data Processing for Network Measurement" in this chapter.
A-8 Basic Measurement Theory
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