f.
Measure
the
output
power
and
note
the
result
in
the
T
est
Record.
2.
Attenuation
Function
T
est
g.
On
the
power
meter
,
press
4
Disp! Ref
5 .
Press
4
dB
5
to
select
a
display
in
dB
.
h.
Using
the
modify
keys
on
the
HP
8153A
with
the
module
under
test,
increase
the
attenuation
and
check
that
the
output
power
changes
.
Note
the
reaction
on
the
T
est
Record.
i.
Set
the
attenuation
to
0.0dB
.
3.
Modulation
Function
T
est
j.
Using
a
BNC
cable
,
connect
the
power
meter
transducer
output
to
the
oscilloscope
input
and
set
the
oscilloscope
as
follows:
0.5V/DIV
DC
coupled,
1ms/DIV
.
k.
On
the
power
meter
,
switch
the
autoranging
o
and
select
the
-20dBm
range
.
l.
On
the
HP
8153A
with
the
module
under
test,
press
4
Pa
ram
5
to
select
the
AUX
parameter
.
Monitor
the
frequency
change
on
the
oscilloscope
as
you
set
the
modulation
to
270Hz,
1kHz,
and
then
to
2kHz.
Use
4
*
5
and
4
+
5
to
modify
the
modulation.
Note
the
reaction
on
the
T
est
Record.
4.
Stability
T
est
a.
Enable
the
HP
81541MM
LED
output
and
allow
the
instruments
to
warm
up
for
60
minutes
.
b.
Select
the
channel
with
the
source
.
i.
Press
4
Pa
ram
5
to
select
the
AUX
parameter
.
Set
this
parameter
to
CW .
ii.
Press
4
Pa
ram
5
to
select
the
ATT
parameter
.
Set
this
parameter
to
zero
.
c.
On
the
power
meter:
i.
Cover
the
input
to
the
sensor
with
a
plastic
cap
and
press
4
Zero
5
to
zero
the
meter
.
ii.
Press
4
Pa
ram
5
to
select
the
parameter
.
Set
this
parameter
to
the
value
displayed
for
the
source
.
iii.
Press
4
Pa
ram
5
to
select
the
T
parameter
.
Set
this
parameter
to
1s .
D-4
P
erformance
T
ests
Summary of Contents for 81541MM
Page 2: ......
Page 4: ......
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Page 8: ...Figures D 1 Performance Test Setup D 3 Tables C 1 HP 81541MM Speci cations C 1 Contents 2 ...