
6.
Stepped
Measurements
What
you'll
nd
in
this
chapter
.
.
.
.
.
.
.
.
.
.
.
6-1
P
erforming
a
stepped
measurement
.
.
.
.
.
.
.
.
.
6-1
Selecting
a
detector
and
setting
a
dwell
time
.
.
.
.
6-3
Using
the
marker
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
6-4
A
dding
data
to
the
signal
list
table
.
.
.
.
.
.
.
.
.
6-5
Changing
the
frequency
step
.
.
.
.
.
.
.
.
.
.
.
6-5
Restarting
and
stopping
the
measurement
.
.
.
.
.
6-5
Using
logarithmic
and
linear
steps
.
.
.
.
.
.
.
.
.
.
6-7
7.
Making
EMC
Diagnostic
Measurements
What
you'll
nd
in
this
chapter
.
.
.
.
.
.
.
.
.
.
.
7-1
Making
Diagnostic
Measurements
Using
a
Close-Field
Probe
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-2
Conguring
systems
for
diagnostic
emissions
.
.
.
.
.
7-2
Setting
up
the
test
equipment
.
.
.
.
.
.
.
.
.
.
.
7-2
Equipment
list
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-2
Making
an
automated
diagnostic
emission
test
.
.
.
.
7-3
Conguring
the
analyzer
for
testing
.
.
.
.
.
.
.
.
7-3
Storing
the
data
to
internal
memory
.
.
.
.
.
.
.
.
7-5
Recalling
the
data
from
internal
memory
.
.
.
.
.
.
7-6
Making
a
eld-strength
measurement
.
.
.
.
.
.
.
7-6
Characterizing
the
emissions
.
.
.
.
.
.
.
.
.
.
.
7-6
Making
a
manual
diagnostic
emission
test
.
.
.
.
.
.
7-9
Other
Diagnostic
T
echniques
.
.
.
.
.
.
.
.
.
.
.
.
.
7-11
Resolving
signals
of
equal
amplitude
.
.
.
.
.
.
.
.
.
7-11
Resolving
small
signals
hidden
by
large
signals
.
.
.
.
7-14
Increasing
the
frequency
readout
resolution
.
.
.
.
.
7-17
Decreasing
the
frequency
span
.
.
.
.
.
.
.
.
.
.
.
7-19
P
eaking
signal
amplitude
with
preselector
peak
.
.
.
.
7-20
Tracking
unstable
signals
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-22
Using
the
marker
track
function
.
.
.
.
.
.
.
.
.
.
7-22
Using
maximum-hold
and
minimum-hold
.
.
.
.
.
.
7-24
Comparing
signals
using
delta
markers
.
.
.
.
.
.
.
.
7-27
Measuring
dierences
between
two
signals
.
.
.
.
.
7-27
Measuring
dierences
between
signals
on
screen
and
o
screen
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-28
Measuring
low-level
signals
.
.
.
.
.
.
.
.
.
.
.
.
.
7-30
Reducing
input
attenuation
.
.
.
.
.
.
.
.
.
.
.
.
7-30
Reducing
IF
bandwidth
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-33
Reducing
averaging
bandwidth
.
.
.
.
.
.
.
.
.
.
7-34
Using
video
averaging
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-35
T
esting
for
distortion
using
the
linearity
check
.
.
.
7-38
Measuring
small
signals
in
the
presence
of
a
large
ambient
signal
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-38
Using
linearity
check
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-41
Demodulating
and
listening
to
an
AM
or
FM
signal
.
7-44
Using
the
analyzer
in
zero
frequency
span
.
.
.
.
.
7-45
Measuring
signals
near
band
boundaries
using
harmonic
lock
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-48
Localized
Susceptability
T
esting
.
.
.
.
.
.
.
.
.
.
.
.
7-51
Conguring
systems
for
localized
susceptability
testing
7-51
Equipment
list
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
7-52
Making
localized
susceptability
measurements
.
.
.
.
7-52
Setting
up
the
tracking
generator
.
.
.
.
.
.
.
.
.
7-52
Contents-3
Содержание 8590 EM Series
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