User manual

Chapter 2 Front Panel Operations RIGOL
DG800 User's Guide 2-47
Frequency Shift Keying (FSK)
When using FSK (Frequency Shift Keying), you can configure the generator to "shift"
its output frequency between two preset frequency values ("carrier amplitude" and
"hop frequency").
To Select FSK Modulation
Press Menu  Modulation  "FSK" to enable the FSK function. When
Modulation is enabled, Sweep or Burst will be automatically disabled (if enabled
currently). Tap the icon
at the upper-right corner of the interface (when Sine is
selected as the carrier waveform) to view and set the parameters of the current
carrier waveform. Tap the icon
at the upper-right corner of the interface again
to go back to the current modulation parameter interface.
To Select the Carrier Waveform
FSK carrier waveform could be Sine, Square, Ramp, or Arbitrary waveform. The
default is Sine.
 Press Menu  Continuous to select the desired carrier waveform.
 Pulse, Noise, Harmonic, Dual-tone, and DC could not be used as carrier
waveform.
To Set Carrier Waveform Parameters
The different settings of various parameters (e.g. frequency, amplitude, offset, and
start phase) of the carrier waveform will affect the output FSK modulated waveform.
For different carrier waveform shapes, the ranges of the various parameters are
different (the ranges are related to the instrument model that you are using and the
currently selected carrier waveform). For all carrier waveform shapes, the default
values are 1 kHz frequency, 5 Vpp amplitude, 0 V
dC
offset, and 0° start phase.
 When the carrier waveform currently selected is Sine, Square, or Ramp, please
refer to descriptions in "To Output Basic Waveform" to set the parameters of
the carrier waveform currently selected.
 When the carrier waveform currently selected is arbitrary waveform, please
refer to descriptions in "To Output the Arbitrary Waveform" to set the
parameters of the carrier waveform currently selected.