User Manual

RIGOL Chapter 4 Common Modulation Output
User‟s Guide for DG5000
4-14
Frequency Shift Keying (FSK)
When FSK (Frequency Shift Keying) modulation is selected, you can configure the
generator to make its output frequency “shift” between two preset frequencies
(“carrier frequency” and “hop frequency”). The “shift” frequency (FSK Rate) is
determined by the signal level inside the instrument or from the [ExtTrig] connector at
the rear panel.
To Select FSK Modulation
Press Mod  Type  FSK to enable FSK function.
 When Mod is enabled, Sweep or Burst will be automatically disabled (if
enabled currently).
 After FSK is enabled, the instrument will generate FSK waveform with the
currently specified carrier and modulating waveform.
To Select Carrier Waveform Shape
FSK carrier waveform shape could be Sine, Square, Ramp or arbitrary waveform, and
the default is Sine.
 Press the front panel key Sine, Square, Ramp or (Arb  Select Wform) to
select desired carrier waveform shape.
 Pulse (basic waveform), Noise and DC could not be used as carrier waveform.
To Set Carrier Frequency
After the carrier waveform shape is selected, you can press Freq/Period to highlight
“Freq”, and then use the numeric keyboard or knob to input desired frequency value.
The available carrier frequency varies with different carrier waveforms.
 Sine: 1 μHz to 250 MHz
 Square: 1 μHz to 120 MHz
 Ramp: 1 μHz to 5 MHz
 Arbitrary waveform: 1 μHz to 50 MHz