Instructions

Chapter 2 Command System RIGOL
DG2000 Programming Guide 2-107
Remarks
 DG2000 can receive modulating waveform from the internal or external modulation source.
 When the internal source is selected, the modulating waveform is set as a Square with 50% duty cycle.
At this time, the rate at which the output frequency "shifts" between "carrier frequency" and "hop
frequency" (
[:SOURce[<n>]][:MOD]:FSKey[:FREQuency]) is determined by the modulation rate
(
[:SOURce[<n>]][:MOD]:FSKey:INTernal:RATE).
 When the external source is selected, the generator receives the external modulating signal from the
rear-panel [Sync/Ext Mod/Trig/FSK] connector. For the connector, controlling FSK modulation
externally is different from controlling AM/FM/PM modulations externally. While controlling the FSK
modulation, you can set the polarity (
[:SOURce[<n>]][:MOD]:FSKey:POLarity).
 When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default.
Return Format
The query returns INT or EXT.
Example
:SOUR1:FSK:SOUR EXT /*Sets the FSK modulation source of CH1 to external modulation source.*/
:SOUR1:FSK:SOUR? /*Queries the FSK modulation source of CH1 and the query returns EXT.*/
[:SOURce[<n>]][:MOD]:FSKey:STATe
Syntax
[:SOURce[<n>]][:MOD]:FSKey:STATe {ON|1|OFF|0}
[:SOURce[<n>]][:MOD]:FSKey:STATe?
Description
Enables or disables the FSK modulation function of the specified channel.
Queries the on/off status of the FSK modulation 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
 FSK (Frequency Shift Keying): the signal generator shifts the output frequency between two preset
frequencies (the carrier frequency and hop frequency).
 The FSK carrier waveform can be Sine, Square, Ramp, or Arbitrary waveform. The default is Sine. Pulse,
Noise, and DC cannot be used as carrier waveform. The different settings of various parameters (e.g.
frequency, amplitude, offset, and start phase) of the carrier waveform will affect the output FSK
modulated waveform.
 When [:SOURce[<n>]] or [<n>] is omitted, the system sets the related parameters of CH1 by default.
 If the sweep function (
[:SOURce[<n>]]:SWEep:STATe) or burst function
(
[:SOURce[<n>]]:BURSt[:STATe]) is currently enabled, it will be disabled automatically when the
modulation function is enabled.
 If the harmonic function is currently enabled (
[:SOURce[<n>]]:HARMonic[:STATe]), the modulation
function cannot be enabled (i.g. the harmonic cannot be modulated).
Return Format
The query returns ON or OFF.
Example
:SOUR1:FSK:STAT ON /*Enables the FSK modulation function of CH1.*/
:SOUR1:FSK:STAT? /*Queries the on/off status of the FSK modulation function of CH1 and the query
returns ON.*/