When
to
Calibrate
Y
our
Receiv
er
Note
T
o
meet
sp ecied
absolute
amplitude
accuracy
,
y
our
receiv
er
m
ust
b e
calibrated.
F
or
accurate
calibration,
ambien
t
temp erature
m
ust
b e
20
to
30
degrees
cen
tigrade.
Y
our
receiv
er
m
ust
b e
stabilized
at
ro
om
temp erature
for
at
least
t
w
o
hours,
to
allo w
com
b
amplitude
to
stabilize.
Calibrate
y
our
HP
8572A
microw
a
v
e
EMI
receiv
er:
at
the
start
of
eac
h
da
y
after
p o
w
er
is
cycled
on
the
RF
preselector
for
eac
h
c
hange
in:
resolution
bandwidth
frequency
band
sp ectrum
analyzer
or
preselector
attenuation
logarithmic/linear
scale
AMPTD
CAL
setting
In
addition
to
these
calibrations,
y
ou
also
should
v
erify
the
p erformance
of
the
HP
8572A
microw
a
v
e
EMI
receiv
er
p erio
dically
.
Complete
RF
preselector
com
b
c
haracterization
and
all
EMI
receiv
er
system
p erformance
tests
ev
ery
six
mon
ths
to
b e
sure
the
EMI
receiv
er
system
con
tinues
to
meet
its
sp ecications.
During
p erformance
testing,
use
the
en
tire
EMI
receiv
er
system
(including
all
cables).
This
p erio
dic
calibration
requires
extensiv
e
test
equipmen
t,
and
can
b e
time
consuming.
F
or
y
our
con
v
enience,
calibration
and
p erformance
v
erication
is
a
v
ailable
through
y
our
lo
cal
Hewlett-Pac
k
ard
service
cen
ter.
1-2
Calibrating
Y
our
Receiv
er
HP
8572A
EMI
Receiv
er
User's
Guide