RIGOL Chapter 2 Front Panel Operations
2-52 DG1000Z User’s Guide
To Select Modulation Source
Press Mod Source to select “Int” or “Ext” modulation source.
1. Internal Source
When internal source is selected, the modulating waveform is set as a Square
with 50% duty cycle, and the frequency at which the output phase “shifts”
between “carrier phase” and “modulating phase” is determined by “PSK Rate”.
2. External Source
When external source is selected, the generator accepts the external modulating
signal from the [CH1/Sync/Ext Mod/Trig/FSK] connector at the rear panel.
Note: for the [CH1/Sync/Ext Mod/Trig/FSK] connector, controlling PSK
modulation externally is different from controlling AM/FM/PM modulations
externally. In PSK modulation, you can set the modulating polarity.
To Set Modulating Rate
When internal source is selected, press PSK Rate to set the frequency at which the
output phase shifts between “carrier phase” and “hop phase”.
Use the numeric keyboard or direction keys and knob to input the desired
frequency value.
The frequency range is from 2mHz to 1MHz and the default is 100Hz.
Note: when external modulation source is selected, this menu will be grayed out and
disabled.
[CH1/Sync/Ext Mod/Trig/FSK]
[CH2/Sync/Ext Mod/Trig/FSK]
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