User's Manual

Table Of Contents

Chapter 2: Task Guide

To select transitional timing or store qualified

1. In the Sampling tab with Timing Mode selected, select the Transitional

Timing with Store Qualification configuration.

Transitional Timing

In Conventional Timing Acquisition mode, the analyzer stores

measurement data at each sampling interval. In Transitional Timing

Acquisition mode, the timing analyzer samples data at regular intervals,

but only stores data when there is a threshold level transition. Each

time a level transition occurs on any of the bits, data on all channels is

stored. A time tag is stored with each stored data sample so the

measurement can be reconstructed and displayed later.

NOTE: Transitional timing or store qualified timing, requires time tags to recreate the

data. Time tags are either stored in the memory resources of an unused pod

pair, or they are interleaved with the data in memory. If tags are interleaved

with the data, available memory depth is reduced by half.

Store Qualified Timing

Store qualified timing allows you to specify what data is stored during

the course of an acquisition. The level of data qualification can be

simple (Store Anything or Store Nothing), or more complex (Custom).

For information on setting up store qualification, refer to To specify

default storing (see page 71)