RIGOL DG1000Z Series - Manual (Page 151)

Chapter 2 Command System RIGOL
DG1000Z Programming Guide 2-139
[:SOURce[]][:MOD]:PM:SOURce
Syntax [:SOURce[]][:MOD]:PM:SOURce {INTernal|EXTernal}
[:SOURce[]][:MOD]:PM:SOURce?
Description Set the PM modulation source of the specified channel to internal (INTernal) or
external (EXTernal) modulation source.
Query the PM modulation source of the specified channel.
Parameter Name Type Range Default
[] Discrete 1|2 1
{INTernal|EXTernal} Discrete INTernal|EXTernal INTernal
Explanation  DG1000Z can receive the modulation waveform from the internal or external
modulation source.
 When internal modulation source is selected, the modulation waveform can be
SINusoid, SQUare, TRIangle, RAMP, NRAMp, NOISe or USER and the default is
SINusoid. NOISe can be used as modulation waveform but cannot be used as
carrier waveform.
 When external modulation source is selected, the signal generator receives the
external modulating signal from the corresponding [Mod/Trig/FSK/Sync]
connector at the rear panel. At this point, the phase deviation of the
modulated waveform is controlled by the ±5 V signal level of the connector.
For example, if the phase deviation is set to 180°, +5V signal level
corresponds to a 180º phase variation. The lower the external signal level, the
less deviation would be generated.
 When [:SOURce[]] or [] is omitted, the system sets the related
parameters of CH1 by default.
Return Format The query returns INT or EXT.
Example :SOUR1:PM:SOUR EXT /*Set the PM modulation source of CH1 to external
modulation source*/
:SOUR1:PM:SOUR? /*Query the FM modulation source of CH1 and the
query returns EXT*/