The Dual FFT Analyzer includes two plots for displaying measurement information. The information displayed can be chosen independently for each plot. The lower plot can be hidden completely.
Display Options
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Measurement
Any of the supported measurements may be selected for display in either or both plots. -
Autoscale
Autoscale enables the vertical scale and range to be set automatically, which can make it easier to keep the live signal(s) visible in the plot. Sometimes, when a measurement doesn't appear as expected, setting Autoscale to Auto can solve the problem. When autoscale is off, the vertical scale of the plot can be manually adjusted by a two-finger pinch gesture within the axis label region of the plot. The range can be adjusted by a single-finger slide gesture within the axis label region. -
FR Mag Vertical Axis
Three vertical scale types are available for viewing the transfer function magnitude: Linear, Logarithmic, and dB. -
Sq IR Vertical Axis
Three vertical scale types are available for viewing the squared impulse response function magnitude: Linear, Logarithmic, and dB. -
Unwrap Phase
The Unwrap Phase switch enables you to select whether you would prefer to keep the phase response plot wrapped between + and - 180 degrees, or unwrapped. -
Horizontal Axis
Two horizontal scale types are available for viewing spectra: Linear and Logarithmic. The desired scale type is determined by the selection of this control. -
Frequency Units
This segmented control lets you choose whether to display frequencies in Hz or cpm (cycles per minute).
Cursor Options
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Peak Track
The cursor may be configured to automatically move to the frequency of the peak value within the current spectrum. This option allows the peak track function to be disabled, or to track the maximum or minimum peak within the spectrum. -
Harmonic Cursors
Additional vertical cursors may be automatically placed at harmonics (integer multiples) of the current (fundamental) cursor frequency (enter a value up to 128).