B&K Precision 2516 - Manual - Manual (Page 53)

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On
Off
Turn On/Off the FFT waveform.
When using the FFT function, first select the channel source by toggling the
button from the FFT menu 1 to change Source between CH1 and
CH2.
Use the
button from the FFT menu 1 to select the Window to use.
Descriptions of each window are provided in Table 11 - FFT Window
Options above.
Use the button in the FFT menu 1 to adjust the FFT Zoom. You can
also use the horizontal timebase keys to change the FFT Zoom.
The FFT waveform can be displayed as part of the full screen or as a split
screen from channel 1 and/or 2. Below illustrates the differences.
Figure 22 - FFT Full Screen (left), Split Screen (right)
The vertical position of the FFT waveform can be adjusted using channel 1
vertical position keys (if Source is CH1) or channel 2 vertical position keys
(if Source is CH2) . The position can always be set back to 0 by going into
FFT menu 2 and pressing to select ToZero.