User`s guide

Chapter 4 Application Examples RIGOL
DSG3000 User’s Guide 4-5
To Output RF Modulated Signal
This section introduces how to output an AM modulated signal. Set the carrier
frequency to 800 MHz, the carrier amplitude to -20 dBm, the AM modulation depth to
60% and the modulation frequency to 20 kHz.
1. Restore to factory setting
Press System  Reset  Preset Type  “Factory” and then press Preset to
restore the factory setting (by default, the modulation source is internal and the
modulation waveform is sine).
2. Set the carrier frequency and amplitude
(1) Carrier Frequency
Press FREQ  Frequency, use the numeric keyboard to input the
frequency value (800) and select the desired unit (MHz) from the pop-up
unit menu or unit keys.
(2) Carrier Amplitude
Press LEVEL  Level, use the numeric keyboard to input the amplitude
value (-20) and select the desired unit (dBm) from the pop-up unit menu or
unit keys. You can also press Enter to select the default unit (dBm).
3. Set the AM modulation parameters
(1) Press AM to enter the amplitude modulation parameter setting interface.
(2) Press Depth, use the numeric keyboard to input the value of the
modulation depth (60) and select the desired unit (%) from the pop-up unit
menu or by pressing Enter.
(3) Press Freq, use the numeric keyboard to input the frequency value (20)
and select the desired unit (kHz) from the pop-up unit menu or unit keys.
(4) Press Switch and select “On” to enable the AM function. The backlight of
AM goes on.
4. Enable the RF modulation output
Press MOD and the backlight goes on. Then, press RF and the backlight goes
on. The MOD and RF labels are displayed in the status bar of the user interface.
The RF modulation output is enabled. At his point, the [RF OUTPUT 50Ω]
connector outputs RF modulated signal according to the current configuration.
NOTE: The backlights of RF and MOD should be lit.