TDS 620A, 640A, & 644A User Manual
3Ć17
Cursor Measurements
Use the cursors to measure the difference (either in time or voltage) between
two locations in a waveform record.
Cursors are made up of two markers that you position with the general pur-
pose knob. You move one cursor independently or both cursors in tandem,
depending on the cursor mode. As you position the cursors, readouts on the
display report measurement information.
There are three cursor types:
horizontal
bar,
vertical bar,
and
paired
(Fig-
ure 3-8).
Horizontal bar cursors
measure vertical parameters (typically volts).
Vertical bar cursors
measure horizontal parameters (typically time or frequen-
cy).
Horizontal Bar Cursors Vertical Bar Cursors
Paired Cursors
Figure 3-8: Cursor Types
Paired cursors
measure both vertical parameters (typically volts) and horizon-
tal parameters (typically time) simultaneously.
Look at Figure 3-8. Note that each of the two paired cursors has a long
vertical bar paired with an
X
. The
X
s measures vertical parameters (typically
volts); the long vertical bars measure horizontal parameters (typically time or
frequency). (See
Cursor Readouts
on page 3-18 for more information.)
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