Purp
ose
This
test
measures
absolute
amplitude
accuracy
through
receiv
er
INPUT
2 .
Note
T
o
assure
test
accuracy
,
y
ou
m
ust
complete
\Calibration
INPUT
2 ",
\Log
Fidelit y",
\Linear
Fidelit y",
and
\Reference
Lev
el
Switching
Uncertain
t
y"
b efore
y
ou
p erform
this
test.
Description
\Amplitude
Accy
.
INPUT
2
(10
dB
A
T
and
0
dB
A
T) "
relies
on
the
calibration
accuracy
of
the
HP
8481A
N(m)
p o
w
er
sensor.
First,
the
p o
w
er
meter
is
calibrated.
Then,
a
syn
thesized
source
is
used
as
a
signal
source
for
this
test.
The
signal
is
sen
t
through
a
p o
w
er
splitter.
One
output
is
measured
with
a
p o
w
er
sensor,
and
the
other
output
is
measured
with
receiv
er
INPUT
2
through
an
HP
1250-1475
N(m)
to
N(m)
adapter.
The
EMI
receiv
er
system
amplitude
resp onse
is
compared
to
the
p o
w
er
meter
resp onse.
The
dierence
b et
w
een
the
corrected
p o
w
er
meter
resp onse
and
the
EMI
receiv
er
system
measuremen
t
is
the
amplitude
accuracy
of
the
EMI
receiv
er
system .
\Log
Fidelit y",
\Linear
Fidelit
y",
\Reference
Lev
el
Switching
Uncertain
t
y",
and
the
accuracy
of
the
EMI
receiv
er
system's
in
ternal
calibration
sequence
con
tribute
to
the
amplitude
accuracy
of
the
EMI
receiv
er
system
in
an
y
v
alid
setting.
These
error
con
tributors
are
measured
in
separate
tests.
Amplitude
accuracy
is
tested
at
b oth
10
dB
and
0
dB
sp ectrum
analyzer
input
attenuation.
Note
\Optional:
En
tering
p o
w
er
sensor
calibration
factors,"
in
c
hapter
2,
lists
requiremen
ts
for
en
tering
calibration
factors
for
the
p o
w
er
sensor
b eing
used.
T
est
Settings
F
unction
Band
B
Band
C
Band
D
RF
FREQ
20
MHz
to
30
MHz
30
MHz
to
300
MHz
300
MHz
to
2.0
GHz
QP
A
lter
9
kHz
120
kHz
120
kHz
RES
BW
100
kHz
1
MHz
1
MHz
RFPS
(atten)
0
dB
0
dB
0
dB
SA
(atten)
10
dB
or
0
dB
10
dB
or
0
dB
10
dB
or
0
dB
Scale
Linear
Linear
Linear
3-38
T
est
Descriptions
HP
8572A
EMI
Receiv
er
User's
Guide
