Vertical Setups Bandwidth Control Window
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
(see page 481) for more information
on controls that affect the bandwidth selections.
(see page 494)
To take ac curate 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 m ore about the Vertical controls. (see page 498)
Enhanced Bandwidth
From the Vertical menu, select Bandwidth Enhanced.
494 DSA/DPO70000D, MSO/DPO/DSA70000C, DPO7000C, and MSO/DPO5000 Series
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