HP 8753D - Page 245

3.
Press
4
CAL
5
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PWRMTR
CAL and
enter the
test port
power level
that you
want the
analyzer
to
maintain
at
the
input
to
your
test device
. Compensate
for the
power loss
of the
power
splitter
or
directional
coupler
in
the
setup
.
4.
If
you
want
the
analyzer to
make more
than one
power measurement
at each
frequency
data
point,
press
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NUMBER
OF
READINGS
4
n
5
4
x1
5
,
(where
n
=
the
number
of
desired
iterations).
If
you
increase
the
number
of
readings
,
the
power
meter
correction
time
will
substantially
increase
.
5.
Press
4
CAL
5
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N
PWRMTR
CAL
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EACH
SWEEP
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TAKE
CAL
SWEEP
to
activate
the
power
meter
correction.
T
o Calibrate
the Analyzer
Receiver to
Measure
Absolute
P
ower
Y
ou can
use the
power meter
calibration
as
a
reference
to
calibrate
the
analyzer
receiver
to
accurately
measure absolute
power
.
The
following
procedure
shows
you
how
to
calibrate
the
receiver
to
any
power
level.
1.
Set
the
analyzer test
port
power
to
the
desired
level:
4
MENU
5
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N
POWER
(enter
power
level)
4
x1
5
2. Connect
the power
sensor
to
the
analyzer
test
port
1.
3. T
o
apply
the
one
sweep
mode
,
press:
4
CAL
5
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N
N
N
N
N
N
PWRMTR
CAL
(enter
power
level)
4
x1
5
N
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ONE
SWEEP
N
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TAKE
CAL
SWEEP
Note
Because
power
meter
calibration
requires
a
longer
sweep
time
,
you
may
want
to
reduce
the
number of
points
before
pressing
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TAKE
CAL
SWEEP
. After
the
power
meter
calibration is
nished,
return
the
number
of
points
to
its
original
value
and
the
analyzer
will
automatically
interpolate
this
calibration.
The
status
notation
PC
will
appear
on
the
analyzer
display
.
P
ort
1
is
now
a
calibrated
source
of
power
.
4.
Connect
the
test
port
1
output
to
the
test
port
2
input.
5.
Choose
a
non-ratioed
measurement
by
pressing:
4
MEAS
5
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INPUT
PORTS
N
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B
N
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N
TEST
PORT 1
This
sets
the
source
at
PORT
1,
and the
measurement
receiver
to
PORT
2,
or
input
port
B
.
6. T
o perform a receiver error-correction, press:
4
CAL
5
NNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNN
RECEIVER CAL
(enter power level)
4
x1
5
NNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNNNNNNNNNNNNNNNNNNNNNNN
NNNN
TAKE RCVR CAL SWEEP
The receiver channel now measures power
to a characteristic accuracy of 0.35 dB or better
.
The accuracy depends on the match
of the power meter
, the source
, and the receiver
.
5-38 Optimizing Measurement Results