4
Making
Typical
Measurements
In
this
c
hapter,
y
ou'll
nd
instructions
for
making
t
ypical
measuremen
ts
with
the
HP
8572A
microw
a
v
e
EMI
receiv
er:
testing
for
o
v
erload
testing
narrowband
and
broadband
signals
making
commercial
compliance
measuremen
ts
p erforming
MIL-STD
461
conducted
emission
tests
p erforming
MIL-STD
461
RE02
radiated
emission
tests
making
CISPR
22
measuremen
ts
T
esting
for
Ov
erload
In
dealing
with
broadband
signals
suc
h
as
pulses,
the
lev
els
display
ed
on
the
CR
T
can
represen
t
only
a
small
fraction
of
the
total
energy
applied
to
the
receiv
er's
input.
Therefore,
while
the
lev
el
display
ed
on
the
CR
T
may
app ear
within
safety
limits,
the
p eak
v
alue
actually
applied
may
b e
b ey
ond
the
1
dB
compression
p oint.
T
o
a
v
oid
this
error,
analyze
the
signal
resp onse
with
the
3
dB
linearit y
c
hec
k
o
v
erload
test
to
determine
if
the
receiv
er
is
o
v
erloaded.
See
Figure
4-1.
Figure
4-1.
T
esting
for
Ov
erload
HP
8572A
EMI
Receiv
er
User's
Guide
Making
Typical
Measurements
4-1