User Manual

Figure 4- 21 Set carrier waveform
Set carrier frequency
See Carrier Frequency Wave Setting
The frequency range of pulse wave is 1μH~30MHz. Default frequency is 1kHz. To set carrier
frequency, please use multi-functional knob and direction key in the interface or press soft
function key Param → Freq and input the required value and select the unit.
Set carrier duty ratio
The range of duty ratio of pulse wave is 0.01%~99.99%. Default duty ratio is 50%. To set
carrier duty ratio, please use multi-functional knob and direction key in the interface or press
soft function key Param → Duty , input the required value and select the unit.
Select modulation source
UTG2000B function/arbitrary waveform generator can select internal or external modulation
source. After you use PWM function, you can see that modulation source is internal by default.
You can change it with multi-functional knob on the interface for using frequency modulation
function or by pressing Param → Source → External
Note: the modulation source can only be selected after PWM function is used.
Press Menu → Mod → Type → PMW (if Type is not highlighted, it may be necessary to
press soft key Type twice to display the next screen of sub-tags) to use PWM function.
Figure 4-22 Select modulation source
1) Internal source
In case of internal modulation source, modulation wave can be sine wave, square wave, rising
ramp wave, falling ramp wave, arbitrary wave and noise, and is sine wave by default. After you
use PWM function, you can see that modulation wave is sine wave by default. You can change
it with multi-functional knob on interface for using PWM function or by pressing
Param → ModWave
Square wave: duty ratio is 50%
Rising ramp wave: degree of symmetry is 100%
Falling ramp wave: degree of symmetry is 0%
Arbitrary wave: when selecting arbitrary wave as modulation waveform, function/arbitrary
waveform generator limits length of arbitrary wave to 4kpts by automatic test count.
Noise: white Gaussian noise
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