RIGOL
DG900 Programming Guide
2-101
[:SOURce[<n>]][:MOD]:FM:INTernal:FUNCtion
Syntax
[:SOURce[<n>]][:MOD]:FM:INTernal:FUNCtion {SINusoid|SQUare|TRIangle|RAMP|NRAMp|NOISe|USER}
[:SOURce[<n>]][:MOD]:FM:INTernal:FUNCtion?
Description
Sets the FM modulation waveform of the specified channel.
Queries the FM modulation waveform of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
{SINusoid|SQUare|TRIangle|RAMP|NRA
Mp|NOISe|USER}
Discrete SINusoid|SQUare|TRIangle|RAM
P|NRAMp|NOISe|USER
SINusoid
Remarks
This command is only applicable to the internal modulation source
[:SOURce[<n>]][:MOD]:FM:SOURce
).
When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default.
SQUare: 50% duty cycle; TRIangle: 50% symmetry; RAMP: 100% symmetry; NRAMp: 0% symmetry;
USER: the arbitrary waveform selected for the specified channel.
Return Format
The query returns SIN, SQU, TRI, RAMP, NRAM, NOIS, or USER.
Example
:SOUR1:FM:INT:FUNC SQU /*Sets the FM modulation waveform of CH1 to Square.*/
:SOUR1:FM:INT:FUNC? /*Queries the FM modulation waveform of CH1 and the query returns SQU.*/
[:SOURce[<n>]][:MOD]:FM:SOURce
Syntax
[:SOURce[<n>]][:MOD]:FM:SOURce {INTernal|EXTernal}
[:SOURce[<n>]][:MOD]:FM:SOURce?
Description
Sets the FM modulation source of the specified channel to internal (INTernal) or external (EXTernal)
modulation source.
Queries the FM modulation source of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
{INTernal|EXTernal}
Discrete
INTernal|EXTernal
INTernal
Remarks
DG900 can receive modulating waveform from the internal or external modulation source.
When the internal modulation source is selected, the modulation waveform can be SINusoid, SQUare,
TRIangle, RAMP, NRAMp, NOISe, or USER. The default is SINusoid. NOISe can be used as the
modulation waveform but cannot be used as carrier waveform.
When the external source is selected, the generator receives the external modulating signal from the
rear-panel [Sync/Ext Mod/Trig/FSK] connector. At this time, the frequency deviation of the
modulated waveform is controlled by the ±5 V signal level on the connector. For example, if the
frequency deviation is set to 1 kHz, +5 V signal level corresponds to a 1 kHz increase in frequency and
-5 V signal level corresponds to a 1 kHz decrease in frequency.
Summary of Contents for DG952
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