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SDG7000A User Manual
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133
10.3 Sweep
Sweep is a special type of frequency modulation (FM). When the sweep is on, the carrier output
frequency can be varied according to a set rhythm (linear/logarithmic) and can be controlled by
a trigger signal.
Waveform Preview
Mod/Sweep/Burst quick setting
Sweep type setting
Trigger source selection
Sweep parameter setting area
Quickly switch to carrier parameter setting page
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10.3.1 Sweep Type
There are two sweep types, linear and logarithmic, as detailed in the following table.
Table 10-12 Types of sweeps
Sweep Type
Description
Linear
This means that the modulating waveform is a sawtooth, which controls
the frequency moves from the start frequency to the stop frequency
following Linear variation
Log
The frequency variation follows a 10
x
law and is often used for frequency
response testing. The frequency response is generally plotted in
logarithmic coordinates (10 octaves), so to see the frequency response in
a logarithmic plot, a uniform distribution of sample points requires the use
of a logarithmic sweep
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