Instructions

5.Front Panel Operation
28
Term Explanation
FSK Rate:
The frequency at which the output frequency shifts between the carrier frequency
and the Hop frequency (Internal Modulation only).
ASK (Amplitude Shift Keying)
Amplitude Shift Keying modulation is a modulation technique that shifts the output signal
amplitude between two amplitudes: the carrier amplitude and modulating amplitude.
Current Parameter
Carrier Frequency
Carrier Amplitude
Carrier Waveform
Modulating Waveform
Load
ASK Rate
Mod Type
Source
Modulating Amplitude
Figure 5-17: The User Interface of ASK
How to set the parameters of ASK
(1) Press Mod function button, then press F1 to select Mod.
(2) Press F1 to switch Mod Type to ASK. 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 ASK source.
(5) If you select Internal, press F3 to set the ASK 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 lower of the
carrier amplitude and modulating amplitude when the external input signal is logic
low level and output the greater 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 Amplitude. Carrier waveform amplitude shifts to the modulating