Carrying out specific processes
Virtual digital oscilloscopes, 60 MHz
VII - 43
Carrying out specific processes (continued)
d) Graphical
representation
The instrument simultaneously displays the FFT and the trace f(t).
The curve displayed in the 'FFT Trace’ window represents the amplitude in
V or dB for the different frequency components of the signal depending on
the selected scale.
The continuous component of the signal is removed by the software.
Two representations are possible:
When the zoom is activated only the zoomed zone is displayed:
The displacement of the zoomed zone is done using the mouse by moving
the scroll bar or the scroll buttons.
Origin of the frequency
0 dB
origin
Horizontal
representation scale
Reference
traces
Zoom
activation
Origin of the
frequency
Linear representation
Logarithmic representation
Zoom
activation
0V trace
origin
Zoom increase
Zoom decrease
Exit zoom
Location of the
displayed zoomed
zone in the memory.
Horizontal scale
of the zoomed trace
Left zoom
scrolling button
Right zoom scrolling
button
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