User Manual

Set modulation depth

Modulation depth is degree of amplitude change, expressed in percentage. The range of

SUM depth is 0%~100%, 100% by default. When modulation depth is 0%, carrier wave is

output. When modulation depth is 100%, modulation wave is output. You can change it with

multi-functional knob and direction key on interface for using amplitude modulation function

or by pressing Depth . In case of external modulation source, the output amplitude of

instrument is also controlled by±5V signal level on external analog modulation input terminal

(Modulation In connector) of back panel.

Comprehensive example

First make the instrument run in SUM mode, and then set an internal sine wave of 1kHz as

modulation signal and a square wave with frequency of 2kHz, amplitude of 200mVpp and

duty ratio of 45% as carrier signal. Finally set modulation depth to be 80%. The specific

steps are as follows:

1)Use SUM function

Press Menu → Mod → Type → SUM (press soft key Type to select if Type is not

highlighted).

Figure 4- 7 Select SUM function

2)Select carrier waveform

After enabling SUM function, press Carrier → Type → Square .

You can press Param again until the following interface appears.