Tektronix TDS3012C User Manual page 114

Reference
Function
Math waveform
Cursors and automatic
measurements
Gray-scale
Slow Horizontal Settings.
slower, the oscilloscope may display waveforms in roll mode. As the
rolling waveform fills the screen, the waveform intensity and vector fill
appears to decrease. The oscilloscope automatically reduces the number
of displayed points in order to maintain a high acquisition rate: this does
not represent a loss of acquired data.
When you stop the acquisition, the original waveform intensity and
vector fill returns to the display.
Using Zoom and Delay Together.
same time to magnify a delayed acquisition.
Fast Time-Base Settings.
of the waveform shows in the display. The waveform record icon
indicates that portion with brackets. Push the zoom
use the horizontal Position control to scroll through the entire waveform
to see any portion you want. The affected time-base settings are shown
in the next table.
Acquisition resolution
Normal
Fast Trigger
At the fastest time-base settings, the maximum zoom magnification
factor is also reduced.
Delay Interactions.
time-base setting and acquisition resolution. If you set a large positive
86
Horizontal zoom
Remains valid;
magnifies and
positions with other
waveforms
Remain functional with
valid readouts
Gray-scale information
may be temporarily
reduced
At horizontal Scale settings of 40 ms/div or
You can use both zoom and delay at the
At the fastest time-base settings, only a portion
Affected time-base settings
100 ns/div to 1 ns/div
4 ns/div to 1 ns/div
The maximum delay setting is a function of the
TDS3000C Series Oscilloscope User Manual
Horizontal preview
Remains fixed; does
not track changes to
channel waveforms
Remain locked to
channel waveforms
Gray-scale information
is lost
button and then