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Bandwidth Control Window
Access this control window from the Vertical menu Bandwidth command.
Overview
Use the Bandwidth control window to filter unwanted high
frequency noise from the waveform and to decrease the noise
bandwidth. Specify the range of frequencies that you want to
acquire by selecting the appropriate button in the control
window.
To Use
Click a Channel button at the top of the control window to
select the vertical input channel. Click one of the Bandwidth
buttons to select the bandwidth of frequencies that you want to
acquire.
Behavior
The bandwidth refers to the range of frequencies that the
instrument can acquire and display accurately with less than
3dB attenuation. Each input channel has its own bandwidth
selection.
To acquire all frequencies on the selected channel, click Full. To limit frequencies above 150
MHz, click 150 MHz; to limit frequencies above 20 MHz, click 20 MHz.
To take accurate measurements, the input frequency should be much less than the rated bandwidth
of the instrument. A good rule to follow is to ensure the bandwidth of the instrument system is
three to five times the bandwidth of the signal that you want to measure.
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