Instructions

4
.
Panel Operation
37
Frequency Shift Keying (FSK)
Using frequency shift keying modulation, the output frequency is shifted between
two preset frequency values (carrier frequency and hopping frequency). The
frequency at which the output moves between the two frequencies is determined
by the internal frequency generator (internal source) or the signal level (external
source) on the rear panel Ext Trig/Burst/Fsk In interface. The carrier wave can be a
sine wave, a square wave, a ramp wave, or an arbitrary wave. The user interface of
the frequency shift keying modulation is shown below.
Figure 4- 17: Frequency shift keying user interface
Steps to set frequency shift keying modulation
(1)
After pressing the Mod function key, press the Modulation type soft key, use
the knob to select, the modulation type is PSK, press the OK soft key. The
carrier waveform can be selected as needed. The following is a sine wave.
(2)
Press to display the waveform and parameters of the current carrier.
You can change the parameters of the carrier. For details, please refer to
Output Sine Wave on page 10. Press or Mod to return to the
modulation mode interface.
(3)
Press Source to select the source. If external is selected, connect the external
signal source to the Ext Trig/Burst/Fsk In interface on the rear panel and skip
to step (5). If you select internal, continue with the following steps.
Note: When the source selects external, set the slope to “positive”, then