HP 54750A, User Manual, Page: 282 / 478

General Purpose Oscilloscope Menus
FFT Menu
Figure 10-4. An FFT display .
Y ou may also notice that there are three horizontal lines of numbers below
the graticule area. The rst line lists the horizontal scale and position settings
of the time domain. The second line lists the vertical and horizontal settings
of the FFT . It is labeled \FT" for F ourier transform. The third line lists the
vertical scale and oset settings of channel 2.
Because the frequency domain may be new to you, let's look at the second
line of numbers . The rst number is the vertical scale in dB/div . The second
number is the oset in dBm at the center of the lower graticule area. The
third number is the horizontal scale in frequency/div . The fourth number is
the center frequency value .
T o maximize the use of the display area, some of the instrument's features
share the lower area of the display . The vertical settings and automatic
measurement results share the same area of the display; the marker results ,
statistics results , and the horizontal settings of the frequency domain share
the same area of the display .
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