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3
Using the Oscilloscope
To use the markers
Markers make it easier to make precise measurements because the marker
measurement readouts show exact voltage and time positions for the
markers. The measurements are based on actual waveform data from the
acquisition system, not on approximations based on the display position,
so you can be sure that the values are highly accurate.
Using the marker and measurement controls, you control two sets of
markers within the oscilloscope graticule. You use markers to make more
accurate measurements of waveform events than you could make visually.
Both time and voltage differences between the markers are updated
continuously on the screen. By default, the markers track the source
waveform. Voltage measurements from the markers are the value of the
waveform at the time set with the marker arrow keys.
• To select the type of marker mode that you want to use, press the
• To turn on Marker A, push the Position knob until the marker that you
• To turn on Marker B, push the Position knob until the marker that you
• To move a marker, turn the Position knob.
To use the quick measurements
The action taken when the [Multi Purpose] key is pressed depends on the
feature selected in the Customize Multipurpose dialog box. The default
feature is QuickMeas (quick measurements), which is described as follows.
• To turn on the quick measurement display, press the [Multi Purpose] key.
• To measure parameters for another waveform, press the [Multi Purpose]
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[Markers] key until the mode appears in the pop- up dialog box.
want to move appears in the pop- up dialog box.
Marker A has a solid line pattern on the waveform display. It is
associated with the first available source on the display.
want to move appears in the pop- up dialog box.
Marker B has a dashed line pattern on the waveform display. It is
associated with the first available source on the display.
In Measurement Marker mode, the marker position cannot be changed.
The five preset measurements defined in the Quick Measurement
configuration are enabled and results are displayed on the screen for
the first waveform source. The factory default measurements are: Vp- p,
Period, Frequency, Rise time, and Fall time.
key until that waveform is the one shown in the measurement readout.
Continuing to press the [Multi Purpose] key cycles through each of the
waveforms available.
Agilent Infiniium 90000 Q-Series Oscilloscopes User's Guide
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