Each input channel has its own external attenuation settings. The attenuation control is automatically set to the correct value
when you attach a probe with a TekProbe/TekVPI interface to the instrument. You can change the external attenuation by
entering a multiplier or ratio with one control, or by entering a dB value with the other control.
Bandwidth control window
From the Vertical menu, select Bandwidth Limit.
Overview
Use the Bandwidth control window to filter unwanted high-frequency noise from the waveform and to decrease the noise
bandwidth.
To use
1. Click a Channels button to select the vertical input channel.
2. Use the drop-down list box to select the range of frequencies to acquire.
Behavior
Bandwidth refers to the range of frequencies that the instrument can acquire and display accurately with less than 3 dB
attenuation.
Each input channel has its own bandwidth selection. Bandwidth selections with (HW) indicate a hardware/analog-only filter. See
the Vertical Setup Control Window for more information on controls that affect the bandwidth selections.
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.
What do you want to do next?
Learn more about the Vertical controls.
Vertical setups
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 493
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