User Manual

Modulation Function 44
Function Explanation
Type PM Phase modulation
Source Internal The source is internal
External The source is external. Use the [Aux In/Out] connector at the rear panel.
Phase Dev Phase deviation ranges from 0° ~ 360°.
Shape Sine Choose the modulating waveform.
Square
Triangle
UpRamp
DnRamp
Noise
Arb
PM Freq Set the modulating waveform frequency. Frequency range: 1mHz~1MHz.
Figure 9.4 Setting Interface of PM Modulation
9.1.5.5 Phase Deviation
Press Phase Dev to highlight the parameter, and then use the numeric keyboard or arrow keys and knob to input the
desired value.
• Use the numeric keyboard or arrow keys and knob to input the desired value.
• The range of phase deviation is from 0° to 360° and the default value is 100°.
Note: The methods of setting other parameters of PM are similar to AM.
9.1.5.6 FSK
The FSK is Frequency Shift Keying, the output frequency of which switches between two preset frequencies (carrier
frequency and the hop frequency or sometimes known as mark frequency (1) and space frequency (0)).
Press Mod → Type → FSK, the parameters of FSK modulation are shown in Figure 9.5.
9.1.6 Key Frequency
When internal modulation source is selected, press Key Freq to set the rate at which the output frequency shifts between
“carrier frequency” and “hop frequency”.