FM
Subsystem
[SOURcel
:
FM
[
:
DEViat ion]
?
[
:
DEViat ion]
<NRf
>
[<f
req term>]
Sets FM deviation. *RST value is
3
kHz.
:
STATe?
:STATe
ON
I
OFF
I
1
I
0
Turns FM modulation ON or OFF. FM is not turned on by just setting
FM:DEViation. Turning FM 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
1
EXTernal
[,
INTernal
I
,EXTernall
Selects FM source. *RST value is INTernal.
:
EXTernal
:
COUPling?
:COUPling
AC
I
DC
Sets source coupling for FM. The GROund parameter defined by the
1991 SCPI Command Reference (17.4.9.2) is not supported. *RST
value is
DC.
:
INTernal
:FREQuency?
:
FREQuency
<NRf
>
[<f
req term>]
Sets the frequency of the FM internal signal source. Legal values are
400
Hz
and
1
kHz.
*RST value
is
1
kHz.
HP-IB Programming
2-15
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