
5
[:SOURce]:AM:INT
ernal:FREQuency?
Syntax
[:SOURce ]:AM:INTernal:FREQuency?
[MIN j DEF jMAX ]
Description
This
query
returns
the
frequency
of
the
amplitude
modulation,
as
a
oating
point
number
in
Hertz.
If
you
specify
MIN ,
DEF ,
or
MAX
with
the
query
,
it
will
return,
respectively
,
the
minimum,
default,
or
maximum
modulation
frequency
.
Example
OUTPUT
724;":AM:INT:FREQ
40.4KHZ"
OUTPUT
724;":AM:STAT
ON"
OUTPUT
724;":AM:INT:FREQ?"
ENTER
724;A$
[:SOURce]:AM:SOURce
Syntax
[:SOURce ]:AM:SOURce
<wsp>
INT j INT1 jINT2 jEXT j0 j 1 j2
Description
This
command
chooses
the
type
or
source
of
the
modulation
of
the
laser
output.
Set
the
source
to
INT ,
INT1
or
0
to
select
internal
modulation,
set
the
source
to
INT2
or
1
to
select
coherence
control,
or
set
the
source
to
EXT
or
2
to
select
external
modulation.
The
default
is
for
internal
modulation
to
be
selected.
Modulation
Input
When
external
modulation
is
selected,
the
signal
is
modulated
according
to
the
signal
applied
to
the
modulation
input
on
the
front
panel
of
the
instrument.
The
maximum
signal
that
can
be
applied
is
5V
pp
,
which
results
in
15%
modulation
of
the
optical
output.
[:SOURce]:AM:SOURce?
Syntax
[:SOURce ]:AM:SOURce?
Description
The
query
returns
the
current
state
of
modulation.
A
returned
value
of
0
indicates
that
internal
modulation
is
selected.
A
returned
value
of
1
indicates
that
coherence
control
is
selected,
2
indicates
that
external
modulation
is
selected.
Example
OUTPUT
724;":AM:SOUR
ON"
OUTPUT
724;":AM:SOUR?"
ENTER
724;A$
Remote
Commands
5-19
Summary of Contents for 8167A
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Page 164: ...D Figure D 1 Test Setup for the Wavelength Tests D 4 Performance Tests ...
Page 177: ...D Figure D 5 Test Setup for the Source Spontaneous Emission Test Performance Tests D 17 ...
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