Monitor Audio ASW100 User Manual download pdf (Page 199)

FFT Analyzer

AM700 Audio Measurement Set User Manual

4-87

Contrast is adjustable using the scaling on the vertical axis of the Spectrogram

display. Select the y-axis and rotate the control knob to adjust the contrast of the

display or press the front-panel Rescale button. Horizontal expansion in the x-axis

of the display can be used to closely examine the area around one of the spectral

components.

In Multitone mode the choices are Point Plot and Table display.

Point Plot. Point Plot is a plot of settled data points with a choice of plotting only

points, lines, or points with interconnecting lines.

Table. The acquired data is displayed in tabular format showing the vertical axis

values in left column and the horizontal axis value in the right column.

Input Range

Input range can be set to a range that matches the dynamic range of the input signal

amplitude. Input Range settings can be made either through the Main Menu Input

selections in the FFT application, as shown in Figure 4-40, or through the Configure

menu for Input Selection. There is a choice of 12 range steps and an auto selection

that looks at the incoming signal and sets the input range accordingly.

NOTE. If the manual gain is set too high, the applied signal can overdrive the A/D

converter and clip the incoming signal. This condition produces erroneous

measurement;, therefore, setting the gain to auto is the usual manner of operation to

avoid this possibility.

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Monitor Audio ASW100 User Manual Page 199