User Manual 55
Ramp: 50% symmetry.
Note: Noise can be used as modulating waveform but cannot be used as carrier waveform.
External Source
With the External source, an external waveform modulates the carrier waveform. The Phase
Deviation is controlled by the ±2.5 V signal level on the front-panel
[Sync/Mod/Trig]
connector.
Other Channel
Other channel: CH1 and CH2 can be used as modulation sources reciprocally. When CH1 is used
as the modulated wave, CH2 can be used as the modulation source. And vice versa.
5.13.5 Modulating Waveform Frequency
When internal modulation source is selected, press
Frequency
to set the frequency of the
modulating waveform.
Use the numeric keyboard or direction keys and knob to input the desired frequency value.
The frequency range is from 2mHz to 50KHz and the default is 100Hz.
Note: This menu will be grayed out and disabled when other modulation sources except the
internal modulation source are selected.
5.13.6 PWM Deviation
Press
Deviation
softkey and input the desired value using the numeric keyboard or direction keys
and knob.
Duty cycle deviation represents the variation (in %) of the modulated waveform duty cycle relative
to the original pulse duty cycle.
Duty cycle deviation range: 0% to 50%
。
The duty cycle deviation cannot exceed the current pulse
duty cycle. The duty cycle is limited by the minimum duty cycle and current edge time setting.
When "Ext" modulation source is selected, duty deviation is controlled by the ±2.5V signal level at
