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Set modulation depth
Modulation depth is the degree of amplitude change, expressed as a 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 the multi-functional control and direction keys on the interface for using amplitude
modulation function or by pressing Depth. When using an external modulation source, the output amplitude of the
instrument is also controlled by ±5V signal level on external analog modulation input terminal (Modulation In connector) on
the back panel.
Comprehensive example
First set the instrument to 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 the
modulation depth to be 80%.
The specific steps are as follows:
1)
Use SUM function
Press MOD to use the function and select SUM function (press soft key Type to select ).
Figure 4- 101 Select SUM function
2)
Set modulation signal parameters
Set with the multi-functional control and direction keys after using SUM function. You can also press soft keys of function
on the above interface for using the SUM function. To set the parameters, press the corresponding soft key, input the
required value and select the unit.
