Rigol DG800 Series - Page 129

Chapter 2 Command System RIGOL
DG800 Programming Guide 2-115
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 phase "shifts" between "carrier phase" and "modulating
phase" (
[:SOURce[<n>]][:MOD]:PSKey:PHASe) is determined by the modulation rate
(
[:SOURce[<n>]][:MOD]:PSKey: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 PSK modulation
externally is different from controlling AM/FM/PM modulations externally. While controlling the PSK
modulation, you can set the polarity (
[:SOURce[<n>]][:MOD]:PSKey: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:PSK:SOUR EXT /*Sets the PSK modulation source of CH1 to external modulation source.*/
:SOUR1:PSK:SOUR? /*Queries the PSK modulation source of CH1 and the query returns EXT.*/
[:SOURce[<n>]][:MOD]:PSKey:STATe
Syntax
[:SOURce[<n>]][:MOD]:PSKey:STATe {ON|1|OFF|0}
[:SOURce[<n>]][:MOD]:PSKey:STATe?
Description
Enables or disables the PSK modulation function of the specified channel.
Queries the on/off status of the PSK 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
 PSK (Phase Shift Keying): the signal generator shifts the output phase between two preset phases (the
carrier phase and modulation phase).
 The PSK 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 PSK
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:PSK:STAT ON /*Enables the PSK modulation function of CH1.*/
:SOUR1:PSK:STAT? /*Queries the on/off status of the PSK modulation function of CH1 and the query
returns ON.*/