60
4
）
. Continue to acquire data until the waveform record is full.
5
）
. Display the newly-acquired waveform.
■
Time Base:
The oscilloscope digitizes waveforms by acquiring the value of an
input signal at discrete points. The time base allows you to control how often the
values are digitized.
To adjust the time base to a horizontal scale that suits your purpose, use the
S/div knob.
■
Time Domain Aliasing
：
Aliasing occurs when the oscilloscope does not sample the signal fast enough
to construct an accurate waveform record. When this happens, the oscilloscope
displays a waveform with a frequency lower than the actual input waveform, or
triggers and displays an unstable waveform.
Sampled points
Apparent low-frequency
waveform due to aliasing
Actual high-frequency waveform
Picture 2.9-5
Operate Introduction:
Set up Sampling Format
You can press the “Acquisition” option button or turn the “Universal” knob
to select “Sampling” mode, “Peak Detect” mode or “Average” mode..
Set up Averages
When you select “Average” format, you can press the “Averages” option
button to select “4”, “16”, “32”, “64”, “128”or “256”.
Set up function interpolation
You can also turn Sins/x interpolation on or off. Press the corresponding option
button to turn Sins/s on or off.
“On” is sin interpolation
Summary of Contents for SDS1000 Series
Page 146: ...138 Coupling DC...
