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Chapter 6 Operations and Measurements RIGOL
MSO7000/DS7000 User's Guide 6-7
dB/dBm or Vrms. The vertical amplitude can be expressed both in log form and
linear form, with dB/dBm and Vrms as the unit respectively. If you need to
display the FFT spectrum within a larger dynamic range, dB/dBm is
recommended.
Press More X continuously to select "Span-Center" (frequency range to
center frequency) or "Start-End" (start frequency to stop frequency).
"Span-Center" (frequency range to center frequency): the frequency range
refers to the screen width, and you can divide the frequency range by 10 to
obtain the frequency per division. Press Span to set the frequency range of
the frequency-domain waveform. For setting methods, refer to descriptions
in "Parameter Setting Method". Press Center to set the frequency of
the frequency-domain waveform relative to the horizontal center of the
screen. For setting methods, refer to descriptions in "Parameter Setting
Method".
"Start-End" (start frequency to stop frequency): start frequency refers to
the frequency at the left side of the screen. Press Start to set the start
frequency of the frequency-domain waveform. For setting methods, refer to
descriptions in "Parameter Setting Method". Stop frequency refers to
the frequency at the right side of the screen. Press End to set the stop
frequency of the frequency-domain waveform. For setting methods, refer to
descriptions in "Parameter Setting Method".
Press More Peak Search to enter the peak search menu.
Press Peak Search continuously to enable or disable the peak search function.
When enabled, the peak search results are displayed on the screen, as shown in
the figure below. Enable the touch screen and tap the "Math" label at the top of
the peak search results to switch among Math1-Math4.
Press Peak Number, then rotate the multifunction knob or use the
pop-up numeric keypad to set the number of peaks. The available range is
from 1 to 15. By default, it is 5.
Press Threshold, then rotate the multifunction knob or use the pop-up
numeric keypad to set the threshold of the peak.
Press Excursion, then rotate the multifunction knob or use the pop-up
numeric keypad to set the excursion of the peak.
Press Table Order, then rotate the multifunction knob to select the
sorting mode of the peak. Press down the knob to select it. You can also
press Table Order continuously or enable the touch screen to select it. The
available sorting mode is "Amp Order" and "Freq Order". By default, it is
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