Instructions

Chapter 2 Command System RIGOL
DG2000 Programming Guide 2-95
[:SOURce[<n>]][:MOD]:AM:DSSC
Syntax
[:SOURce[<n>]][:MOD]:AM:DSSC {ON|1|OFF|0}
[:SOURce[<n>]][:MOD]:AM:DSSC?
Description
Enables or disables the AM carrier waveform suppression function of the specified channel.
Queries the on/off status of the AM carrier waveform suppression function of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
{ON|1|OFF|0}
Bool
ON|1|OFF|0
OFF
Remarks
 DG2000 supports two types of amplitude modulation: normal amplitude modulation and double
sideband suppressed carrier (DSB-SC) amplitude modulation. In the normal amplitude modulation, the
modulated waveform contains carrier waveform components. Because carrier waveform components
carry no information, the modulation is less efficient. In order to improve the modulation efficiency,
the carrier waveform components are suppressed on the basis of the normal amplitude modulation. At
this time, the modulated waveforms all carry information. This method is called double sideband
suppressed carrier modulation.
 When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default.
Return Format
The query returns ON or OFF.
Example
:SOUR1:AM:DSSC ON /*Enables the AM carrier waveform suppression function of CH1.*/
:SOUR1:AM:DSSC? /*Queries the on/off status of the AM carrier waveform suppression function of
CH1 and the query returns ON.*/
[:SOURce[<n>]][:MOD]:AM:INTernal:FREQuency
Syntax
[:SOURce[<n>]][:MOD]:AM:INTernal:FREQuency {<frequency>|MINimum|MAXimum}
[:SOURce[<n>]][:MOD]:AM:INTernal:FREQuency? [MINimum|MAXimum]
Description
Sets the AM modulation frequency of the specified channel.
Queries the AM modulation frequency of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
<frequency>
Real
2 mHz to 1 MHz
100 Hz
Remarks
 This command is only applicable to the internal modulation source
(
[:SOURce[<n>]][:MOD]:AM:SOURce).
 When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default.
Return Format
The query returns the AM modulation frequency in scientific notation, with 7 effective digits. For example,
1.500000E+02 (the AM modulation frequency is 150 Hz).