4-6 Description
Fig.4-3 Zoom window
Also choosing the best scale range 120 dB or 140 dB can be helpful to
better distinguish signals and disturbances.
Sweep: the two radio buttons in this box allow the user to select the Linear
or Logarithmic frequency scale.
Logarithmic scale is used to emphathise and clearly display low
frequencies even thow high ones are included in the graph. High
frequencies are therefore compressed to the high side of displayed range.
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