8.
On
the
quasi-p eak
adapter,
press
4
ON
5
to
start
the
quasi-p eak
detector.
Note
Though
the
p eak
v
alues
of
the
pulsed
signals
remain
the
same,
as
the
rep etition
rate
decreases
the
quasi-p eak
amplitude
also
decreases.
Measuremen
ts
will
b e
accurate
only
if
the
signal
of
in
terest
is
ab o
v
e
the
rst
graticule
from
the
b ottom
of
the
display
.
If
the
quasi-p eak
amplitude
is
b elow
the
rst
graticule,
select
4
X10
5
on
the
quasi-p eak
adapter.
This
video
amplier
b o osts
the
signal
b
y
a
factor
of
ten,
allo
wing
accurate
measuremen
ts.
If
y
ou
use
the
quasi-p eak
adapter
4
X10
5
amplier,
subtract
20
dB
from
the
marker
amplitude
sho
wn
on
the
display
.
Whenev
er
a
v
oltage
is
m
ultiplied
b
y
a
factor
of
ten,
in
terms
of
dB
there
is
a
20
dB
dierence.
9.
Press
4
MAX
HOLD
5
on
the
sp ectrum
analyzer
and
allo
w
the
receiv
er
to
sw
eep
for
sev
eral
seconds.
10.
Press
4
PEAK
SEARCH
5
and
read
the
marker
amplitude
on
the
display
.
Refer
to
Figure
4-12.
Figure
4-12.
Quasi-P
eak
Measurement
of
a
Broadband
Signal
4-20
Making
Typical
Measurements
HP
8572A
EMI
Receiv
er
User's
Guide