HP 8753D - Page 281

Note
After
measurement
calibration,
you
can
change
the
power within
a range
and
still
maintain
nearly
full
accuracy
.
In some
cases better
accuracy can
be
achieved
by
changing
the
power
within
a range
.It
can be
useful to
set
dierent
power
levels
for
calibration
and
measurement
to
minimize
the eects
of
sampler
compression
or
noise
oor.
If
you
decide
to
switch
power
ranges
, the
calibration is
no longer
valid and
accuracy
is
no
longer
specied.
However
,
the analyzer
leaves the
correction on
even
though
it's
invalid.
The
annotation
C?
will
be
displayed whenever
you change
the power
after
calibration.
Figure 6-6. Power Range Transitions in the Automatic Mode
6-14 Application and Operation Concepts