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2
g.
Using
the
Modify
knob
,
increase
the
angle
slowly
until
the
power
on
the
multimeter
starts
to
decrease
.
Return
to
the
angle
that
gave
the
maximum
power
.
Setting
the
W
orst
Case
Transmission
SoP
.
W
e
set
the
state
of
polarization
for
the
worst
case
transmission,
because
we
can
nd
this
more
accurately
(the
resolution
of
the
power
meter
stays
the
same
,
but
the
full
scale
value
is
lower
,
therefore
we
can
be
more
accurate).
W
e
also
use
the
fact
that
the
relationship
between
power
of
the
signal
transmitted
through
the
DUT
and
polarization
on
the
surface
of
the
sphere
can
be
expressed
as
concentric
circles
about
the
worst
case
(or
optimum),
and
that
for
a
linear
DUT
the
worst
case
and
optimum
are
on
opposite
sides
of
the
sphere
.
P
ower
contours
about
the
worst
case
on
the
poincare
sphere
This
means
that
we
nd
the
worst
case
position
by
moving
around
the
sphere
along
the
equator
rst
(that
is
nding
the
angle
of
longitude
of
the
worst
case)
and
then
the
overall
worst
case
by
moving
around
this
line
of
longitude
.
2-6
Setting
a
State
of
P
olarization