Reference
There are two waveform cursors; a reference cursor , an d a delta
cursor
. All difference (Δ) measurements are measured from the
reference cursor t o the delta cursor. A negativ e ΔX measurem ent means
that the delta cursor is positioned earlier in the waveform record than
the reference cursor. A negative ΔY measurement means that the
delta cursor is positioned at a lower Y waveform signal level than th e
reference cursor.
All absolute (@) measurements are referenced to the XY waveform's 0,
0 origin, and show the value of the active cursor.
0, 0 Origin. The XY w aveform origin is the 0 volt point of each source
waveform. Positioning b
oth source w avefo rm 0 volt points on the
vertical center graticule places the origin in the center of the screen.
Switching Between XY and YT. You can switch betw een XY and YT
display mod e to see the location of the cursors in the YT waveform. T he
waveform record icon at the top of the graticule also shows the relative
cursor positions in the waveform record.
Waveform Sources. You can use XY cursors on active acquisitions,
single sequence acquisitions, and reference waveforms. You need to
store bo th XY s ou
rce waveforms in order to recreate an XY waveform.
The X axis waveform must be stored in Ref1.
Display
Push the Display button to show the display m enu .
Bottom Side Description
DotsOnly Settoontoseedotsonly. Settooffto
see dots and vectors.
Persist Time
Sets persist time.
Set to Auto Sets the Waveform Intensity knob to
control the persistence time.
Waveform
Display
Clear
Persistence
Clears any displayed persistence .
TDS3000C Series O scilloscope User Manual 75
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