Instructions

5.Front Panel Operation
27
Frequency generator or the Signal Voltage Level offered by the Ext Trig/Burst/Fsk In
connector in the rear panel. The Carrier Waveform can only be Sine. The user interface of
the FSK is shown as below.
Current Parameter
Carrier Frequency
Carrier Amplitude
Carrier Waveform
Modulating Waveform
Load
FSK Rate
Mod Type
Source
Hop Frequency
Figure 5-16: The User Interface of FSK
How to set the parameters of FSK
(1) Press Mod function button, then press F1 to select Mod.
(2) Press F1 to switch Mod Type to FSK. If the Carrier Waveform is not Sine, the
system will switch it to Sine automatically.
(3) Press button to display the waveform and parameters of the Carrier
Waveform. You can change the parameters, please refer to To Output Sine Signals on
page 12. Press button again to return to the Modulation mode interface.
(4) Press F5 to select Internal or External as FSK source.
(5) If you select Internal, press F3 to set the FSK Rate.
If you select External, press F3 to switch Slope between Positive and Negative.
The external source can be offered by the Ext Trig/Burst/Fsk In connector in the rear
panel. Set the Slope to Positive and the generator would output the carrier frequency
when the external input signal is logic low level and output the hop frequency when
the external input signal is logic high level. The situation is the opposite when the
Slope is set to Negative.
(6) Press F4 to set Hop Frequency. Carrier waveform frequency shifts to the Hop
frequency with the specified FSK rate, and then returns to the original frequency.