HP 54540 Series - Page 247

Measurements
Measurement Considerations
Measurement Considerations
In the repetitive and real-time modes, measurements are made two or three
times per second when continuous is on and statistics is off. When statistics
is on, Measurements are made every time the oscilloscope triggers.
When continuous is turned off, the markers are placed on the display
showing where the measurement was made. This helps you verify that the
oscilloscope is measuring the correct phenomena and to aid you in
windowing the signal for measurement.
Statistics are available on the oscilloscope, so you may display the mean,
standard deviation, min, and max for each measurement result.
In the user defined mode, you may also define some of the measurement you
want to make. Specify your own thresholds rather than usiiig the standard
10, 50, and 90 percent levels. Specify the IEEE standard definitions of
thresholds and measurements. Or set thresholds in either voltage or percent.
You may rely on the oscilloscope to set top and base, or define those levels
yourself in voltage. The Atime, +width, -width measurement is also under
your control.
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