Display Waveform or Trace Data
The
fi
gure to the right shows the frequency
domain window’s trace indicator.
1.
An
RF
trace indicator is placed at the
Reference Level.
2.
A capital
M
appears if the maximum
trace is turned on.
3.
A capital
A
appears if the average trace
is turned on.
4.
A capital
N
appears if the normal trace
is turned on.
5.
The small
m
appears if the minimum
trace is turned on.
Orange highlighting indicates the currently
selected trace. In the
fi
gure to the right,
the small
m
, which stands for the minimum
trace, is highlighted. This indicates that the
minimum trace is currently selected.
Detection Types
The MDO4000 calculates FFTs with a 1,000 to ~2,000,000 point output, depending on the acquisition settings. It then
reduces that FFT output into a 1,000 pixel-wide display. This means that approximately 1 to 2,000 FFT points get
compressed into each pixel column. The MDO4000 gives you several choices as to how this compression is done. The
choices are: +peak, sample, average, and -peak. The
fi
gure below illustrates how these detection methods work in a 5:1
compression, where
fi
ve points are reduced to each pixel column.
1.
FFT points
2.
Decimation
3.
+Peak: Uses the highest amplitude point
in each interval.
4.
Sample: Uses the
fi
rst point in each
interval.
112
MDO4000 Series Oscilloscopes User Manual
Summary of Contents for MDO4054-3
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