AM
Subsystem
CSOURcel
:
AM
CAL
Subsystem
[
:
DEPTh]
?
[:DEPTh] <NRf>
[<AM
term>]
Sets
AM
depth in percent. *RST value
is
30%.
:
STATe?
:STATe
ON
I
OFF
I
1
I
0
Turns
AM
modulation
ON
or OFF. AM
is
not turned on by just setting
AM:DEPTh. Turning AM modulation
ON
will not automatically turn
OFF any other types of modulation. Turning any or all modulation
types
ON
or OFF must be done explicitly.
If
a
modulation type is
turned
ON
while another modulation type
is
ON,
an execution error
-221
is
generated, and the state of the instrument
is
unchanged. *RST
value is OFF.
:
SOURce?
:SOURce INTernal
I
EXTernal [,INTernal 1,EXTernalI
Selects
AM
source. 'RST value is INTernal.
:
EXTernal
:
COUPling?
:COUPling
AC
I
DC
Sets source coupling for
AM.
The GROund parameter defined by the
1991 SCPI Command Reference (17.1.9.2) is not supported. *RST
value is
DC.
:
INTernal
:FREQuency?
:
FREQuency
<NRf
>
[<f
req term>]
Sets the frequency of the
AM
internal signal source. Legal values are
400
Hz
and
1
kHz.
*RST value
is
1
kHz.
[SOURcel
:
CAL
:
DCFM
Eliminates the offset in dc FM
so
that the carrier frequency remains
the same with no modulation applied. External dc modulation
must be
on
to implement this calibration or execution error -221
is
generated.
2.14
HP-IB
Programming
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