User Manual

Modulation Function 43
Function Explanation
Type FM Frequency modulation
Source Internal The source is internal
External The source is external. Use the [Aux In/Out] connector at the rear panel.
Freq Dev Set the frequency deviation
Shape Sine Choose the modulating waveform.
Square
Triangle
UpRamp
DnRamp
Noise
Arb
FM Freq Set the modulating waveform frequency. Frequency range 1mHz~1MHz (internal source).
Figure 9.3 Setting Interface of FM Modulation
9.1.5.3 Frequency Deviation
Press FM Dev to highlight the parameter, and then use the numeric keyboard or arrow keys and knob to input the desired
value.
• The deviation should be equal to or less than the carrier frequency.
• The sum of the deviation and the carrier frequency should be equal to or less than maximum frequency of the selected
carrier waveform.
Note: The methods of setting other parameters of FM are similar to AM.
9.1.5.4 PM
The modulated waveform consists of two parts: the carrier and the modulating waveform. In PM, the phase of the carrier
varies with the instantaneous voltage level of the modulating waveform.
Press Mod → Type → PM, the parameters of PM modulation are shown in Figure 9.4.