User’s Manual MSO/UPO2000 Seri es
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generator limits the length of arbitrary wave to 4 kpts by automatic sampling point mode.
Noise
：
White Gauss noise
⑤
Set the frequency of modulating wave
Set the frequency of modulating wave to 2mHz
～
50kHz (the default is 100Hz). When AM function is
enabled, the default frequency of modulating wave will be displayed. Adjusting Multipurpose knob,
numeric keyboard to set the frequency value.
⑥
Set the depth of modulating wave
Modulating depth indicates the changing of amplitude, it expressed by percentage. AM modulating
depth can set to 0%~120%. The default is 50%. Adjusting Multipurpose knob, numeric keyboard to set
the modulating value.
Output a constant amplitude when the modulating depth is 0% (a half of the setting carrier amplitude)
Output amplitude will change along with modulating wave when the modulating depth is 100%.
Output amplitude will not over 10 Vpp when the modulating depth is greater than 100%. (Load is 50Ω.)
(2)
Frequency Modulating
（
FM
）
In frequency modulating, the modulated waveform usually consists of a carrier wave and a modulated
wave, and the carrier frequency will change with the amplitude of the modulated wave.
①
Enable FM modulating
Press MENU to extend menu list, press Modulate to select FM modulating as shown in Figure 17-5.
Figure
17-5
②
Select carrier waveform
FM carrier waveform can be sine wave, square wave, ramp wave, pulse wave or arbitrary wave (except
DC). The default is sine wave. After FM modulating is selected, press Carrier soft key to enter carrier
waveform interface, press Multipurpose knob to select the desired carrier waveform, as shown in Figure
17-6.
