User Manual

Set carrier frequency

See Carrier wave frequency setting

Select modulation source

UTG2000B function/arbitrary waveform generator can select internal or external modulation

source. After you use DSBAM function, you can see that modulation source is internal by

default. You can change it with multi-functional knob on the interface for using DSBAM

function or by pressing Param → Source

Figure 4- 10 Select modulation source

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 DSBAM function, you can see that modulation wave is sine wave by default.

You can change it with multi-functional knob on interface for using amplitude modulation

function or by pressing Param → ModWave

Square wave: duty ratio is 50%

Rising ramp wave: symmetry degree is 100%

Falling ramp wave: symmetry degree is 0%

Arbitrary wave: when selecting arbitrary wave as modulation waveform, function/arbitrary

waveform generator limits length of arbitrary wave to 4Mpts by automatic test count.

Noise: white Gaussian noise

External source

In case of external modulation source, modulation wave and frequency will be hidden in

parameter list, when an external waveform will be used to modulate carrier waveform.

DSBAM depth is controlled by ±5V signal level on external analog modulation input terminal

(Modulation In connector) of back panel. For example, if modulation depth in parameter

list is set to be 100%, SUM output amplitude is the maximum when external modulation

signal is +5V and the minimum when external modulation signal is -5V.