Tektronix DPO2304SX, Printable Help

Page: 685 / 920

Controls. From the Menu bar, select Vertical > Bandwidth Enhancement.
■
When Analog Only is selected, the bandwidth enhancement filter is not applied to the input data.
■
When Digital Filters (DSP) Enabled is selected, the bandwidth enhancement filter is turned on whenever the base sample
rate of the channel, or higher, is selected using the horizontal time base controls. When in Enabled,, the filter will turn off if
the sample rate goes lower than the base rate or if other oscilloscope settings are selected that do not support the filter
operation, such as Fast Acquisition.
Coupling
All instruments and probes specify a maximum signal level. Do not exceed the limit, even momentarily, as the input channel or
probe may be damaged. Use external attenuators if necessary to prevent exceeding the limits.
Coupling determines whether an input signal is directly connected to the input channel (DC coupling), connected through a DC
blocking capacitor (AC coupling), or not connected at all (GND coupling).
The input resistance of each input channel can be 1 MΩ or 50 Ω. To properly terminate signals when using coaxial cables, or to
support active probes with different termination requirements, select the termination in the Coupling control window.
All probes expect a specific coupling and input termination. Both coupling and input termination are displayed on the screen. If
the instrument determines the coupling and termination required by the probe, either implicitly because of the TekProbe/TekVPI
interface or through performing a probe compensation, the instrument sets the required coupling and input termination.
Consider the following when you use 50 Ω termination with any channel:
■ The instrument does not accurately display frequencies under 200 kHz if AC coupling is selected.
■ The instrument reduces the maximum volts per division setting for the channel to 1 V from 10 V (10 V from 100 V with a 10X
probe attached), since input amplitudes appropriate for the higher settings would overload the 50 Ω input.
■ The instrument switches to 50 Ω termination and DC coupling if you connect an active probe. Active probes also reduce the
maximum volts per division.
What do you want to do next?
Learn about the Vertical Setup window.
Learn about the Termination control window.
Scaling and positioning
The scaling and positioning controls determine the portion of the input signal received by the acquisition system. Set vertical
scaling, positioning, and DC offsets to display the features of interest on your waveform and to avoid clipping.
Waveform data outside of the vertical acquisition window is clipped; that is, the data is limited to the minimum or maximum
boundaries of the vertical acquisition window. This causes inaccuracies in amplitude-related measurements. For more
information see
Vertical Acquisition Window Considerations .
Oscilloscope reference
DPO70000SX, MSO/DPO70000DX, MSO/DPO70000C, DPO7000C, and MSO/DPO5000B Series 653