Acquiring and Displaying Waveforms
TDS 500B, TDS 600B, & TDS 700A User Manual
3–29
To avoid aliasing, be sure to sample the input signal at a rate more than twice as
fast as the highest frequency component. For example, a signal with frequency
components of 500 MHz would need to be sampled at a rate faster than
1 Gigasamples/second to represent it accurately and to avoid aliasing. The
following tips may help you eliminate aliasing on a signal:
H Try adjusting the horizontal scale.
H Try pressing the AUTOSET button.
H Try switching the acquisition mode (in the acquisition menu) to Envelope or
Peak Detect. Envelope searches for samples with the highest and lowest
values over multiple acquisitions; Peak Detect mode does the same but in a
single acquisition. Either can detect faster signal components over time.
H Try pressing the InstaVu acquisition button (TDS 500B and TDS 700A
models only). InstaVu mode results in waveform displays similar to those
obtained using an analog oscilloscope, due to its fast waveform capture rate.
Customizing the Display
The TDS Oscilloscope can display waveform records and other display elements
in different ways. This section describes how to adjust the oscilloscope display
style, intensity level, graticule, and format.
NOTE. TDS 500B and 700A models only: This section assumes you are using
Normal acquisitions mode and gives display settings for this mode. If you select
InstaVu acquisitions, procedures for making Style, Format, and Readout display
settings differ and some selections are not permitted. See Using InstaVuT
Acquisition Mode, on page 3–44, for setup differences and Incompatible Modes on
page 3–47.
To bring up the Display menu:
Press DISPLAY ➞ Settings (main) ➞ Display (pop-up).
The Display menu allows you to adjust the style, intensity level, graticule, and
format features described below. The Color menu allows you to alter color
settings for various display components such as waveforms and text. To find
more information on color, see Customizing the Display Color on page 3–34.
TDS 600B only: Press DISPLAY ➞ Style (main) ➞ Vectors, Dots, Intensified
Samples, Infinite Persistence, or Variable Persistence (side). (See Fig-
ure 3–17.)
Change Display Settings
Select the Display Style
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