Rigol DG822 - Page 122

RIGOL Chapter 2 Command System
2-108 DG800 Programming Guide
[:SOURce[<n>]][:MOD]:FSKey:SOURce
Syntax
[:SOURce[<n>]][:MOD]:FSKey:SOURce {INTernal|EXTernal}
[:SOURce[<n>]][:MOD]:FSKey:SOURce?
Description
Sets the FSK modulation source of the specified channel to internal (INTernal) or external (EXTernal)
modulation source.
Queries the FSK modulation source of the specified channel.
Parameter
Name
Type
Range
Default
[<n>]
Discrete
1|2
1
{INTernal|EXTernal}
Discrete
INTernal|EXTernal
INTernal
Remarks
 DG800 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