Teledyne-lecroy AORM - Advanced Optical Recording Measurements Manual de usuario descargar pdf (Pagina 14)

12 ISSUED: June 2013 923133 Rev A

Field Description

Show

Determine

s which table of values is displayed below the grid.

When Parameters is selected, a checkbox is displayed that

enables you to turn on or off the display of statistics values.

Source This can be a channel, math function, or memory

trace. A Use Equalizer checkbox is provided to

apply a filter to the data source.

Data Gate This can be a channel, math function, memory

trace, or other. It specifies the input that will be

used to determine where to perform measurements

on the input signal. The polarity is always high.

Use

Equalizer

This checkbox enables filtering of the data source.

Data Slope Polarity of the pits/spaces to use for the

measurement, when appropriate. Pos polarity

refers to pits, Neg polarity refers to spaces, Both

can be selected to use both pits and spaces.

Data

Hysteresis The Hysteresis selection imposes a limit above and

below the Threshold, which precludes

measurements of noise or other perturbations

within this band. The width of the band is specified

in divisions.

Guidelines for Use

1. Hysteresi

s must be larger than the ma

ximum

noise spi

ke you want to ignore.

2. The larg

est value of hysteresis usable

is less

than the dista

nce from the threshold to the closest

extreme value of the waveform.

3. Unle

ss you know the largest noise and closes

extreme level

that will ever occur on any cycle,

leave some margin on both sides of the threshold.

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