16.
Press
4
PEAK
SEARCH
5,
on
the
sp ectrum
analyzer
section,
and
read
the
marker
amplitude
on
the
display
.
Refer
to
Figure
4-11 .
F
or
CW
signals,
the
p eak
and
quasi-p eak
v
alues
are
the
same.
Figure
4-11.
Quasi-P
eak
Measurement
of
a
CW
Signal
Example:
Quasi-P
eak
Measuremen
t
(Broadband
Signal)
This
example
uses
a
pulse
generator
as
the
broadband
signal
source.
1.
Press
4
CLEAR
WRITE
5
and
the
LIN
k
ey
on
the
sp ectrum
analyzer.
2.
Change
the
reference
lev
el
to
bring
the
signal
amplitude
near
the
top
of
the
display
,
to
pro
vide
the
b est
quasi-p eak
dynamic
range
for
this
measuremen
t.
3.
On
the
sp ectrum
analyzer,
press
4
SHIFT
5
C,
to
read
amplitude
in
dBV.
4.
Disconnect
the
signal
source.
Connect
the
preselector
section's
COMB
GENERA
TOR
OUTPUT
to
the
receiv
er
input
used
in
the
measuremen
t.
Note
Before
calibrating
the
system:
Make
sure
all
equipmen
t
settings
are
correct.
Do
not
c
hange
the
resolution
bandwidth,
scale,
attenuation,
or
input
p ort
after
calibration.
(The
start
and
stop
frequencies
may
b e
c
hanged
after
calibration
if
the
frequency
range
stays
within
the
range
at
whic
h
the
receiv
er
w
as
calibrated.)
Manually
set
critical
system
parameters
man
ually
,
suc
h
as
resolution
bandwidth.
P
arameters
that
are
set
man
ually
will
not
c
hange
during
the
calibration
routine;
parameters
that
are
still
in
the
auto-coupled
mo
de
may
c
hange
during
the
calibration
routine.
4-18
Making
Typical
Measurements
HP
8572A
EMI
Receiv
er
User's
Guide