2
Using
the
Internal
Modulation
The
internal
modulating
source
is
a
square
wave
with
a
50%
duty-cycle
.
Y
ou
can
set
both
the
amplitude
and
the
frequency
of
this
signal.
The
amplitude
is
set
by
the
power
parameter
.
This
is
the
maximum
output
power
of
the
output
signal;
at
the
minimum,
nothing
is
output.
Figure
2-8.
The
Modulated
Signal
Setting
the
Output
P
ower
of
a
Modulated
Signal
Y
ou
can
set
the
output
power
of
a
modulated
signal
if
the
display
looks
like
this:
Figure
2-9.
Setting
the
Output
P
ower
of
an
Internally
Modulated
Signal
Press
4
OUTPUT
POWER
5 ,
NNNNNNNNNNNNNNNNNNNN
Mod/CW
,
and
NNNNNNNNNNN
Int
as
necessary
to
get
to
this
display
.
See
\Changing
the
V
alue
of
a
P
arameter"
in
Chapter
1
if
you
need
details
on
how
to
edit
parameters
.
Y
ou
can
change
the
units
by
pressing
NNNNNNNNNNNNNNNNN
W/dBm
.
The
notes
above
about
excessive
power
,
and
the
analog
output
apply
also
to
the
power
of
a
modulated
signal.
Setting
the
Frequency
of
a
Modulated
Signal
Y
ou
can
also
set
the
frequency
of
a
modulated
signal
from
the
display
shown
above
.
Press
N
NNNNNNNNNNNNN
Freq
to
select
the
parameter
.
See
\Changing
the
V
alue
of
a
P
arameter"
in
Chapter
1
if
you
need
details
on
how
to
edit
parameters
.
Y
ou
can
change
the
units
by
pressing
NNNNNNNNNNNNNNNNNNNN
Hz/kHz
while
you
are
editing
the
value
.
The
new
units
come
into
eect
when
you
press
4
ENTER
5 .
Setting
Wavelength
and
P
ower
2-11
Содержание 8167A
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Страница 164: ...D Figure D 1 Test Setup for the Wavelength Tests D 4 Performance Tests ...
Страница 168: ...D Figure D 2 Test Setup for the Maximum Output Power Test except HP 8168F D 8 Performance Tests ...
Страница 177: ...D Figure D 5 Test Setup for the Source Spontaneous Emission Test Performance Tests D 17 ...
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