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90 Chapter 4
Making Measurements
Preparing for Measurements
Measurement Control
Following your selection of the instrument mode and mode setup you
will use keys in the
Meas Control keys to control processes that affect the
running of the current measurement.
•
Measure - Toggles between Single and Cont (for continuous)
measurement states. When set to Single the measurement will
continue until it has reached the specified number of averages set by
the average counter. When set to Cont the measurement will run
continuously, and perform averaging according to the current
average type (repeat or exponential). The default is continuous. See
page 90 for an explanation of averaging.
•
Pause - Pauses the current measurement. Once toggled, the label of
the
Pause key changes to read Resume. Measurement settings can be
change while it is paused. The Resume key continues the active
measurement from the point at which it was paused.
•
Restart re-initiates the current measurement from the beginning
(including averaging), without changing the current measurement
settings. If the measurement is paused, then restart is the same as
resuming from the beginning of the measurement instead of from
the point at which it was paused.
Measurement Setup
The Meas Setup key accesses features that enable you to adjust
parameters of the current measurement, such as resolution bandwidth.
You will also use the
Meas Setup menu to access Average, Trig Source, and
Advanced measure setup feature menus.
The following features can be used with many measurements:
• Res BW - Changes the resolution bandwidth of a given
measurement. Selection of a narrower bandwidth will result in a
longer data acquisition time.
• Restore Meas Defaults - Presets only the settings that are specific
to the selected measurement. This will set the measure setup
parameters to the factory defaults, only for the currently selected
measurement.
Averaging
Features in the Average menu allow you to modify the number,
average mode, and type of averaging you use for the currently selected
measurement. The features available for averaging will vary slightly
depending on the measurement that is currently active. On the display
averaged trace results are shown in blue, while the instantaneous
signal is shown in yellow.