HP 8753D - Page 244

9.
Press 4
CAL
5
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PWRMTR
CAL
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ONE
SWEEP
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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.
Some
accuracy will
be lost
for
the
interpolated
points
.
The
analyzer
will
use
the
data
table
for
subsequent
sweeps
to
correct the
output power
level
at
each
measurement
point.
Also
,
the status
annunciator PC
will appear
on
the
analyzer
display
.
Note
Y
ou can
abort
the
calibration
sweep
by
pressing
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N
PWRMTR
CAL OFF
.
10.
Remove
the
power
sensor
from
the
analyzer
test
port
and
connect
your
test device
.
Using
Continuous
Correction
Mode
Y
ou
can
set
the
analyzer
to
update
the
correction
table
at
each
sweep
(as
in
a leveling
application),
using
the
continuous
sample
mode
.
When
the
analyzer
is in
this mode
,
it
continuously
checks
power
at
every
point
in
each
sweep
.
You
must keep
the
power
meter
connected
as
shown
in
Figure
5-9
.
This
mode
is
also known
as power
meter
leveling,
and
the
speed
is
limited
by
the
power
meter
.
Note
Y
ou
may
level
at
the
input
of
a
device
under
test,
using
a
2-resistor power
splitter
or
a
directional
coupler
before
the
device; or
level
at
the
output
of
the
device
using
a
3-resistor
power
splitter
or a
bidirectional
coupler
after
the
device
.
Figure 5-9. Continuous Correction Mode for Power Meter Calibration
1. Connect a power splitter or directional coupler to the port supplying RF power to your test
device, as shown in Figure 5-9.
2. Set test port power to approximate desired leveled power.
Optimizing Measurement Results 5-37