4.
Select
the
resolution
bandwidth
for
the
measuremen
t.
F
or
this
example,
use
1
MHz.
5.
Select
0
dB
or
10
dB
sp ectrum
analyzer
attenuation.
6.
Set
the
cen
ter
frequency
to
100
MHz
and
the
span
to
5
MHz.
Press
4
PEAK
SEARCH
5,
and
place
a
marker
on
the
p eak
of
the
signal.
7.
Select
the
v
ertical
scale
desired
for
the
measuremen
t.
F
or
measuremen
ts
with
the
p eak
detector,
the
log
scale
is
normally
used.
F
or
a
v
erage
measuremen
ts,
use
the
linear
scale.
8.
Adjust
AMPTD
CAL
on
the
fron
t
panel
of
the
sp ectrum
analyzer
un
til
the
marker
reads
-10.0
dBm.
9.
Connect
the
signal
source
to
the
receiv
er
INPUT
3 .
10.
Select
receiv
er
INPUT
3
b
y
pressing
the
0
4
5
k
ey
on
the
switch
driv
er.
This
input
is
selected
when
the
0
LED
light
is
OFF.
11.
Set
resolution
bandwidth
and
v
ertical
scale
to
the
same
settings
used
for
calibration.
12.
Set
sp ectrum
analyzer
attenuation
to
the
same
v
alue
used
for
calibration.
Select
dBuV
units
using
the
KSC
command.
Find
the
reference
lev
el
oset
on
the
EMI
receiv
er's
calibration
c
hart.
En
ter
this
v
alue
in
the
receiv
er
with
4
SHIFT
5
4
REF
LEVEL
5.
Because
this
oset
accoun
ts
for
the
gain
of
the
preamplier,
use
4
-dBm
5
to
make
the
resulting
reference
lev
el
oset
a
negative
n
um
b er.
13.
T
une
the
receiv
er
to
the
signal
with
4
CENTER
FREQUENCY
5
and
4
SP
AN
5.
14.
Use
4
PEAK
SEARCH
5
to
place
a
marker
on
the
top
of
the
signal
to
b e
measured.
15.
Press
4
PRESEL
PEAK
5
on
the
sp ectrum
analyzer.
The
receiv
er
automatically
will
select
the
optimum
preselector
D
A
C
setting
to
give
the
maximum
resp onse.
If
y
ou
are
making
an
a
v
erage
measuremen
t,
set
the
v
ertical
scale
to
LINEAR,
and
reduce
the
video
bandwidth
to
10
Hz.
16.
Measure
the
signal
amplitude
using
the
marker.
17.
Lo ok
up
the
measured
frequency
on
the
EMI
receiv
er's
calibration
table.
If
necessary
,
in
terp olate
b et
w
een
t
w
o
p oints
in
the
table
to
obtain
the
desired
amplitude
correction
v
alue.
18.
Subtract
the
amplitude
correction
v
alue
from
the
marker
reading
obtained
in
step
16.
This
v
alue
corrects
for
the
frequency
resp onse
of
the
receiv
er.
Example:
Quasi-P
eak
Measuremen
t
(CW
Signal)
This
example
uses
a
100
MHz
signal
as
the
CW
signal.
HP
8572A
EMI
Receiv
er
User's
Guide
Making
Typical
Measurements
4-15
