Tektronix TDS5054, Руководство пользователя

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Measuring Waveforms
3- 124
TDS5000 Series User Manual
Taking Cursor Measurements
Because cursor measurements give immediate feedback on the amplitude or time
values they measure, they are usually quick to take and are more accurate than
graticule measurements. Also, since you can position cursors wherever you want
them on the waveform, they are easier to localize to a waveform segment or
feature than automatic measurements.
Table 3--8 defines the cursor types.
Table 3- 8: Cursor types
Cursor function Measurements Cursor readout
Horizontal cursors
Horizontal cursors measure vertical parameters (amplitude) in volts
or watts. The cursor readouts are defined as:
V1 = Level @ Cursor 1 with respect to its source ground level
V2 = Level @ Cursor 2 with respect to its source ground level
∆
V = Level @ Cursor 2 -- Level @ Cursor 1
Level is cursor displacement from the source ground multiplied by
the source in volts/div. The two cursors may have different sources
and therefore can have different volts/div settings.
Vertical cursors
T
Vertical cursors measure horizontal parameters.Typically the hori-
zontal parameters are in time or frequency, but depend on the units
you select. The cursor readouts are defined as:
T1 = Time @ Cursor 1 with respect to the trigger point
T2 = Time @ Cursor 2 with respect to the trigger point
∆
T = Time @ Cursor 2 -- Time @ Cursor 1
Time is divisions of displacement of the cursor from its source trigger
point multiplied by the source in time/div.
Paired (and Split) cursors
T
Paired cursors measure vertical parameters (typically volts) and
horizontal parameters (typically time or frequency) simultaneously.
Each cursor is, in effect, both a vertical and horizontal cursor. These
paired cursors cannot be moved off of the waveform.
Split cursors are the same as paired cursors except that the second
cursor can be on a different waveform than the first cursor. The
sources can have different volts/div settings.
Cursors can measure channel, reference, and math waveforms. You must set the
source of each cursor explicitly in the Cursor Setup control window.
Cursors are not available with histograms, or in XY or XYZ display modes.
Cursor Types