Bandwidth Limit; Bandwidth Limiting Setup; Averaging; Linear And (Sinx)/X Interpolation - LeCroy WaveRunner Xi series Operator's Manual

Bandwidth Limit

Reducing the bandwidth also reduces the signal and system noise, and prevents high frequency aliasing.

Bandwidth Limiting Setup

To set bandwidth limiting:
1. In the menu bar, touch Vertical, then select a channel from the drop-down menu.
2. Touch inside the Bandwidth field and select a bandwidth limit value from the pop-up menu.
The options are:
Full
o
200 MHz
o
20 MHz
o

Averaging

The WaveRunner Xi oscilloscope allows you the opportunity to continuously average your signal to reduce signal
noise and aid in signal evaluation. If you want to use averaging, select a value here by touching inside the
Averaging field and entering a value up to 1 million sweeps on the pop-up keypad.

Linear and (SinX)/X Interpolation

Linear interpolation, which inserts a straight line between sample point, is best used to reconstruct straight-edged
signals such as square waves. (Sinx)/x interpolation, on the other hand, is suitable for reconstructing curved or
irregular waveshapes, especially when the sample rate is 3 to 5 times the system bandwidth.

Interpolation Setup

1. Touch the button for the channel you want to set up,
2. In the dialog area, touch inside the Interpolation field under Pre-Processing. "Pre-Processing" means
before Math processing.
3. Touch inside the Interpolation field. A pop-up menu appears offering Linear or Sinx/x interpolation.
4. Touch the button for the type of interpolation you want.

Inverting Waveforms

Touch the Invert checkbox to invert the waveform for the selected channel.

QuickZoom

QuickZoom automatically displays a zoom of the channel or trace on a new grid.

Turning On a Zoom

Touch the Zoom button

Finding Scale

You can access the Find Scale button from the Vertical Adjust dialog. This feature automatically calculates
peak-to-peak voltage, and chooses an appropriate Volts/Div scale to fully display the waveform.

Using Find Scale

1. Touch the trace label for the waveform you desire.
2. Touch the Find Scale icon.
WRXi-OM-E Rev C
in the Vertical Adjust dialog.
O
for example.
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