Bandwidth limit, Bandwidth limiting setup, Averaging – Teledyne LeCroy WaveRunner XI SERIES Operator’s Manual User Manual

Page 55: Linear and (sinx)/x interpolation, Interpolation setup, Inverting waveforms, Quickzoom, Turning on a zoom, Finding scale, Using find scale

PERATOR

’

ANUAL

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

200 MHz

20 MHz

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,

for example.

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

in the

Vertical Adjust dialog.

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