User Manual
Modulation Function 45
Function Explanation
Type FSK Frequency shift keying modulation.
Source Internal The source is internal.
External The source is external. Use the [Aux In/Out] connector at the rear panel.
Key Freq Set the frequency at which the output frequency shifts between the carrier frequency and the
hop frequency (internal modulation only): 1mHz~1MHz.
Hop Freq Set the hop frequency.
Figure 9.5 Setting Interface of FSK Modulation
• Use the numeric keyboard or arrow keys and knob to input the desired value.
• The key frequency ranges from 1mHz to 1MHz.
• When external modulation source is selected, this menu is hidden.
9.1.7 Hop Frequency
The range of the hop frequency depends on the carrier frequency currently selected. Press Hop Freq to highlight the
parameter, and then use the numeric keyboard or arrow keys and knob to input the desired value.
• Sine: 1uHz~120MHz
• Square: 1uHz~25MHz
• Ramp: 1uHz~1MHz
• Arb: 1uHz~20MHz
Note: The methods of setting other parameters of FSK are similar to AM. In addition, the external modulating signal
of FSK must be Square which complies with the CMOS level specication.
9.1.7.1 ASK
When using ASK (Amplitude Shift Keying), the carrier frequency and key frequency will need to be set. The key frequency
is the shift rate of modulated waveform amplitude.
Press Mod → Type → ASK, the parameters of ASK modulation are shown in Figure 9.6.