
D
a.
Select
2
P
and
turn
the
knob
to
get
minimum
reading
on
8153A
display
(maximum
value
at
negative
sign).
b.
Select
2"
B
and
turn
the
knob
to
get
minimum
reading
on
8153A
display
.
Y
ou
should
repeat
this
step
several
times
using
the
smallest
step
size
when
turning
the
knob
.
The
Extinction
Ratio
is
the
absolute
maximum
of
any
measured
value
(without
the
negative
sign)
Note
The
maximum
measured
value
is
one
that
might
only
occur
momentarily
and
after
several
tries
because
of
random
position
changes
,
that
is
,
you
need
to
approach
the
\minimum
position"
from
both
sides
,
for
both
parameters
several
times
.
11.
Note
the
measured
result
in
your
test
record
12.
Repeat
list
item
6
to
list
item
11
for
1510nm,
1530
nm
and
1560
nm.
Always
change
wavelength
setting
on
all
instruments
of
the
test
setup
,
and
make
sure
to
optimize
the
maximum
transmission
of
the
lter
.
Example
P
erformance
T
est
for
the
HP
8169A
Option
020
T
est
T
est
Description
Minimum
Result
Maximum
Measurement
No
.
Spec
.
Spec
.
Uncertainty
III.
Extinction
Ratio
W
avelength
Extinction
Ratio
1470nm
40dB
43.5dB
1510nm
45dB
48.2dB
1530nm
45dB
50.6dB
1560nm
40dB
44.5dB
D-12
P
erformance
T
est