Reference
You can use the f
ollowing methods to eliminate aliases:
Increase the sample rate by adjusting the Horizontal Scale to a faster
frequency set
ting. Since you increase the Nyquist frequency as you increase
the horizontal frequency, the aliased frequency components should appear at
their proper frequency. If the increased number of frequency components
shown on the screen makes it difficult to measure individual components,
push the zoom button
to magnify the FFT waveform.
Use a filter on the source signal to bandwidth limit the signal to frequencies
below that of the Nyquist frequency. If the components you are interested
in are below the built-in bandwidth settings (20 MHz bandwidth for all
oscillos
copes, 150 MHz bandwidth for 300 MHz and 500 MHz oscilloscopes),
set the source signal bandwidth to the appropriate value. Push the Vertical
Menu button to access the source channel bandwidth menu.
TDS3000C Series Oscilloscope User Manual 77
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