AutoFocus User’s Guide 4
©1989-2018 Lauterbach GmbH
AutoFocus User’s Guide
Version 16-Nov-2018
Introduction
Sampling high-speed parallel buses requires special concepts to compensate for the effects of wave
reflections, component tolerances, different trace lengths, limited pad driver capabilities, signal coupling etc.
All these effects might add up to a reduced signal amplitude, jitter and channel-to-channel skew.
Trace port analyzers (TPAs) that cannot compensate for these issues might not be able to trace high-speed
targets, even if they support high data rates in theory.
The real challenge, however, is not to process high-speed data within a digital design, but to get the trace
signals from the target into the TPA hardware without any information loss.
Trace probes with AutoFocus technology meet that challenge!
Intended Audience
This manual categorizes users into the following groups:
•AutoFocus average users: In addition to reading chapter Installation, they should focus on the
sections Automatic Setup and Basic Checks.
•AutoFocus advanced users: As they are familiar with the above chapters and sections, advanced
users should also read the sections Advanced Checks and Manual Setup.
•AutoFocus expert users: As they are familiar with the above chapters and sections, they should
also read the section Protocol Check.
Prerequisites
• This document assumes that you already have the PowerTrace I or PowerTrace II hardware and
a fully functional TRACE32 software installation.
• For greater than 16-bit trace ports, you need a second flex extension cable. This prerequisites
does not apply AutoFocus II MIPI-based preprocessors.
