3.
On
the
power
meter:
a.
Cover
the
input
to
the
sensor
with
a
plastic
cap
and
press
4
Zero
5
to
zero
the
meter
.
b.
Press
4
Pa
ram
5
to
select
the
parameter
.
Set
this
parameter
to
the
value
displayed
for
the
source
.
c.
Press
4
Pa
ram
5
to
select
the
T
parameter
.
Set
this
parameter
to
1s .
4.
Using
the
HP
81101A
C
cable
,
connect
the
output
of
the
source
to
the
input
of
the
sensor
.
Make
sure
that
the
cable
is
xed
and
that
it
cannot
be
moved
during
the
measurement.
5.
Select
the
MENU
mode
on
the
power
meter
.
a.
Press
4
Reco
rd
5
to
select
STABILTY .
b.
Press
4
Edit
5
and
select
the
T_TOTAL
parameter
.
Set
the
T_TOTAL
parameter
to
15
minutes
.
c.
Press
4
Edit
5
and
then
4
Exec
5
to
run
the
stability
application.
6.
When
the
stability
test
has
completed,
press
4
More
5
to
select
the
SHOW
application.
Press
4
Edit
5
and
then
4
Next
5 /4
Prev
5
to
display
the
DIFF
result.
Divide
this
result
by
2
to
obtain
the
value
for
the
stability:
D I
F
F
2
=
S
tabil
ity
(dB
)
Note
the
result
on
the
T
est
Record.
7.
Repeat
the
stability
measurement
(steps
5
and
6)
with
T_TOTAL
set
to
6
hours
.
HP
81552SM
P
erformance
T
ests
D-5