Calibrating
Receiv
er
INPUT
3
Note
Receiv
er
INPUT
3
is
the
preamplier
input
on
the
HP
8449B
Opt
H02
preamplier.
When
calibrating
receiv
er
INPUT
3 ,
Complete
the
calibration
pro cedure
for
frequency
range,
resolution
bandwidth,
logarithmic/linear
scale,
and
attenuation
settings.
Apply
amplitude
correction
factors
from
the
calibration
table
on
page
1-10.
Execute
a
PRESEL
PEAK
(preselector
p eak)
for
eac
h
signal
in
preselected
band
1
through
band
4
(2
GHz
to
22
GHz) .
T
o
calibrate
receiv
er
INPUT
3 :
1.
Connect
the
100
MHz
CAL
OUTPUT
on
the
sp ectrum
analyzer
to
receiv
er
INPUT
2 .
2.
On
the
RF
preselector,
select
the
b
ypass
path
b
y
pressing
the
ENABLE
4
5
k
ey
and
the
BYP
ASS
4
5
k
ey;
the
BYP
ASS
LED
near
receiv
er
INPUT
2
will
light.
3.
Select
the
preamplier
b
ypass
path
b
y
pressing
the
SWITCHES
0
4
5
k
ey
on
the
attenuator/switc
h
driv
er;
the
LED
in
that
k
ey
will
light.
4.
Press
4
RECALL
5
4
8
5
on
the
sp ectrum
analyzer.
5.
Select
the
resolution
bandwidth
and
logarithmic/linear
scale
settings
for
the
measuremen
t.
6.
Adjust
AMPTD
CAL
on
the
sp ectrum
analyzer
for
010
dBm
60.20
dB.
7.
Press
4
RECALL
5
4
9
5
on
the
sp ectrum
analyzer.
8.
Adjust
FREQ
ZER
O
on
the
sp ectrum
analyzer
for
maximum
trace
amplitude.
9.
Press
the
SWITCHES
0
4
5
k
ey
on
the
attenuator/switc
h
driv
er
un
til
the
LED
turns
o.
10.
Press
4
SHIFT
5
4
PRESEL
PEAK
5
on
the
sp ectrum
analyzer.
11.
T
o
correct
for
receiv
er
frequency
resp onse,
subtract
the
gain
factor
from
the
display
ed
signal
amplitude.
See
\Correcting
Receiv
er
INPUT
3
Using
a
Calibration
T
able").
Steps
1
through
6
p erform
a
mo
died
4
RECALL
5
4
8
5
amplitude
adjustmen
t
through
the
b
ypass
path.
Pressing
4
SHIFT
5
4
PRESEL
PEAK
5
in
step
10
will
optimize
2
GHz
to
22
GHz
RF
preselector
lter
tracking
for
b est
o
v
erall
resp onse.
T
o
obtain
true
signal
amplitude,
complete
a
4
PRESEL
PEAK
5
for
eac
h
signal.
HP
8572A
EMI
Receiv
er
User's
Guide
Calibrating
Y
our
Receiv
er
1-5