Exfo PSO-100 Series Optical Sampling Oscilloscopes Manual de usuario Pagina 60

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Setting up and Using the Optical Sampling Oscilloscope
52 PSO-100
Displaying Histograms
Displaying Histograms
You can view either a horizontal or a vertical histogram of the data to help
you better see the distributions in the time or power direction. For
example, you can select a vertical histogram to measure the SNR, or a
horizontal histogram to measure the RMS timing jitter.
In the figure below, we have selected a vertical histogram, and selected a
window using the mouse. A red square shows the histogram window. The
histogram is shown to the left and the mean, the standard deviation, the
SNR values, and the number of histogram hits are
shown in the measurement box at the bottom of the application.
10*log
10
mean
2
std
2
()=()
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