Automotive Ethernet Compliance: The Five Test Modes

Figure 1:Automotive Ethernet electrical compliance test
is defined at the connector of the transmitter

Following up on our introduction to Automotive Ethernet compliance testing, let's move on to an overview of the five test modes that comprise the compliance test suite for the 100Base-T1 protocol. The test modes allow for a common pattern to test stressful conditions across all devices. Testing in this fashion offers the best possible odds for achieving true interoperability.

Introduction to Automotive Ethernet Compliance Testing

As with most any networking scheme, Automotive Ethernet is subject to standardization to ensure that the various components of a given system reliably pass signals among themselves. Where there is a standard for a protocol, there must also be testing for compliance with that standard. This will be the first in a series of posts detailing compliance test of the Physical Media Attachment (PMA) aspect of the Automotive Ethernet standard.

Back to Basics: Metrology

Some sciences are more obscure than others; these may be of interest and importance to relatively few. The term “metrology” may leave even some science geeks scratching their heads, but for those in the test and measurement arena, metrology is an extremely critical area of scientific endeavor.

The Periodic Table of Oscilloscope Tools: Document

Oscilloscope users can find themselves managing a lot of detail in the course of driving their instruments. They need to keep track of instrument setups. They have to know standards-based compliance test routines backward and forward. Often, the need arises to remotely control the oscilloscope, interface it with other applications, and export/import acquisition data. And, importantly, the oscilloscope has to aid, and not hinder, collaboration with other members of the engineering team(s).

And thus we arrive at the end of our survey of the Periodic Table of Oscilloscope Tools with the Document portion.

• Hardcopy: Use the oscilloscope's Print button to pre-define a documentation action and execute that action with the press of one button. Select to create a file of a screen image in a variety of formats; send an email with an attached screen image; copy data to a clipboard; print a document; or save the waveform data, screen images, panel setups, and the end user's annotations as a LabNotebook (see below).

The Periodic Table of Oscilloscope Tools: Analyze (Part III)

We're nearing the end of our tour of the Periodic Table of Oscilloscope Tools, our way of presenting our broad palette of oscilloscope tools in a concise, clear fashion. In this installment, we'll finish up the Analyze grouping, by far the largest on the Periodic Table.

The Periodic Table of Oscilloscope Tools: Analyze (Part II)

Figure 1: The Analysis
tools in an oscilloscope
lend it debug power

Oscilloscopes are central to many engineering tasks, but perhaps to none more so than debugging. Something is going on with your design but you don't know what it is. However, armed with an oscilloscope with the sort of sophisticated analysis tools found in Teledyne LeCroy's instruments, even Mr. Jones can get to the bottom of the problem. Let's continue our survey of the Periodic Table of Oscilloscope Tools with more on analysis tools.

The Periodic Table of Oscilloscope Tools: Analyze (Part I)

Figure 1: Analysis tools deepen
insight into waveform behavior
and relationships

The path from problem to solution via oscilloscope moves through a number of stages. Doing so involves capture of a signal, determining how it's to be viewed, taking measurements of various parameters, and possibly applying math functions to the waveform. All of these stages depend on the roster of tools that the oscilloscope brings to bear on the process. Teledyne LeCroy's Periodic Table of Oscilloscope Tools represents our view of the world of such tools.