2
P
ower
contours
with
a
search
path
to
the
worst
case
transmission
state
of
polarization
8.
Press
4
Circle
5 ,
and
NNNNNNN
P
,
to
select
P
.
9.
Search
for
the
line
of
longitude
with
the
minimum
power
(use
a
similar
method
as
for
the
position
of
the
polarizing
lter;
rst
changing
the
tens
,
then
the
units
,
then
the
hundredths).
10.
Press
NNNNNNN
"
B
,
to
select
"
B
.
11.
Search
for
the
angle
of
latitude
with
the
minimum
power
.
Setting
the
Optimum
Transmission
SoP
.
12.
Read
the
value
for
"
B
from
the
display
.
13.
A
dd
180
to
this
value
.
14.
Type
in
the
new
value
,
and
press
4
Enter
5 .
The
state
of
polarization
is
now
set
to
the
value
for
the
current
setup
that
gives
the
greatest
power
through
the
ber
.
This
is
possible
here
because
the
ber
behaves
linearly
.
F
or
non-linear
components
the
polarizations
for
worst
case
and
optimum
transmission
will
not
be
on
opposite
sides
of
the
sphere
,
and
the
angle
between
them
is
a
characteristic
of
the
component.
Setting
a
State
of
P
olarization
2-7