Measurements and Math Functions 5
InfiniiVision 7000B Series Oscilloscopes User’s Guide 159
The standard deviation shown in Statistics is calculated using the same
formula used for calculating the standard deviation measurement. The
formula is shown in the section titled “Std Deviation” on page 172.
The source channel of the measurement is shown in parenthesis after the
measurement name. For example: "Freq(1)" indicates a frequency
measurement on channel 1.
You can switch the statistics Display On or Display Off. Statistics continue to
accumulate even when the statistics display is off.
When you navigate away from the Measurements Menu, the statistics
display will no longer be displayed, but statistical data collection will
continue. Return to the Measurements Menu to see the data again.
To reset the statistics measurements, press the Reset Statistics softkey. This
resets all statistics and begins recording statistical data again.
Each time a new measurement (for example: frequency, period, or
amplitude) is added the statistics are reset and accumulation of statistical
data begins again.
When the [Single] key is pressed, statistics are reset and a single
measurement is done (count = 1). Successive [Single] acquisitions
accumulate statistical data ( and the count is incremented).
Press the Transparent softkey to disable the Transparent mode. This shows
statistics with a gray background. Press the Transparent softkey again to
enable Transparent mode. This writes measurement values, statistics, and
cursor values on the screen without a background. This controls the
display of statistics in both measurements and the optional Mask test
feature.
The Increment Statistics softkey only appears when the acquisition is stopped
and the optional segmented memory feature is off. Press the [Single] or
[Run/Stop] key to stop the acquisition. You can use the horizontal position
control (in the Horizontal control section of the front panel) to pan
through the waveform. Active measurements will stay on screen, allowing
you to measure various aspects of the captured waveforms. Press Increment
Statistics to add the currently measured waveform to the collected
statistical data.
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