You need to test, we're here to help.

You need to test, we're here to help.

20 June 2017

VIDEOS: Exploring MAUI with OneTouch

MAUI with OneTouch makes child's play of complex oscilloscope operations
Figure 1: MAUI with OneTouch makes
child's play of complex oscilloscope
operations
If a picture is worth a thousand words, how many words is a video worth, even if it's only 10 to 15 seconds long? If the videos in question illustrate how to use Teledyne LeCroy's MAUI with OneTouch next-generation user interface (Figure 1), their value is inestimable. Once you've seen how easy it is to use an oscilloscope with MAUI with OneTouch, you'll know it was time well spent.

19 June 2017

Why Automotive Ethernet?

The MOST infotainment protocol offers a higher aggregate bandwidth than Automotive Ethernet, but its 150-Mb/s bandwidth is shared across the network
Figure 1: The MOST infotainment protocol offers a higher
aggregate bandwidth than Automotive Ethernet, but its 150-Mb/s
bandwidth is shared across the network
In recent posts, we've been reviewing the subject of Automotive Ethernet in general and the BroadR-Reach protocol in particular. In today's installment, let's look at some of the benefits of using the protocol while comparing it to some other protocols that see usage in the automotive environment.

14 June 2017

Fundamentals of the BroadR-Reach Protocol

BroadR-Reach delivers bandwidth of 100 Mb/s
Figure 1: BroadR-Reach
delivers bandwidth of
100 Mb/s
The burgeoning complexity of vehicular networks, the resultant high bandwidth demands, and the harshness of the automotive environment have driven the development of what we know today as Automotive Ethernet. Our last post began an overview of Automotive Ethernet technology, focusing on the physical/mechanical constraints and industry trends that influenced the protocol's development. Next, let's look more closely at the BroadR-Reach protocol.

12 June 2017

Back to Basics: Automotive Ethernet

Automotive Ethernet handles a wealth of functionality
Figure 1: Automotive Ethernet handles
a wealth of functionality
Today's vehicles are as networked, if not more so, than our homes, offices, and factories. According to one estimate, the wiring harness for a multiplexed bus in a high-end luxury vehicle can weigh as much as 110 lbs. Hence the rise of standards for automotive networking such as Automotive Ethernet (Figure 1). Let's begin a survey of the basics of Automotive Ethernet: What is it, where did it come from, where is it going, and what are the testing requirements?

30 May 2017

An Inside Look at an Automotive Ethernet Seminar

Students gain first-hand experience in Automotive Ethernet protocol testing
Figure 1: Students gain first-hand experience in
Automotive Ethernet protocol testing
Teledyne LeCroy's Automotive Technology Center (ATC) in Farmington Hills, MI recently hosted a full-day seminar on Automotive Ethernet. Below, Bob Mart, product line manager, shares some of his thoughts on how the seminar went and provides a preview of Teledyne LeCroy's next live Automotive Ethernet day at the ATC on June 15, 2017 (detailed information on this and other automotive-related events can be found here).

19 May 2017

Testing the DDR Memory Interface's Physical Layer (Part IV)

Probes are a key element of the total signal acquisition system
Figure 1: Probes are a key element of the total signal
acquisition system
In this multipart survey of testing the DDR interface's physical layer, we've looked at the basics of the interface itself, a high-level overview of the testing, how to access DDR signals, and read/write burst separation. In this installment, we'll cover preparation for the actual testing.

24 April 2017

Testing the DDR Memory Interface's Physical Layer (Part III)

For analysis purposes. it's critical to separate read and write bursts of interest
Figure 1: For analysis purposes. it's critical to separate
read and write bursts of interest
Last time around, we began examining some of the challenges that come with testing the DDR interface's physical layer. In that post, we concentrated on getting to the devices' physical connections by various means including interposers, backside vias, and DIMM series resistors. Now, presuming we've managed to gain access to the DDR's ball-grid array, the next hurdle is separation of read and write bursts.

11 April 2017

Testing the DDR Memory Interface's Physical Layer (Part II)

A typical BGA package for DDR memory
Figure 1: Shown is a typical BGA
package for DDR memory
In the first of this series of posts, we undertook a high-level view of physical test of a DDR memory interface. Moving forward, let's look into some of the specific challenges one faces in a close examination of these interfaces.

05 April 2017

Testing the DDR Memory Interface's Physical Layer (Part I)

Clock, strobe, and data are three critical signals in DDR test
Figure 1: Clock, strobe, and data are
three critical signals in DDR test
In an earlier post, we took a brief tour through what constitutes a DDR memory interface: clock, command, address, and strobe+data lines linking a memory controller and an array of DRAM memory ICs. Next, we'll examine what DDR interface testing is all about, concentrating primarily on the physical layer.

29 March 2017

Fundamentals of the DDR Memory Interface

A representative test setup for physical-layer DDR testing
Figure 1: A representative test setup
for physical-layer DDR testing
Double data-rate (DDR) memory has ruled the roost as the main system memory in PCs for a long time. Of late, it's seeing more usage in embedded systems as well. Let's look at the fundamentals of a DDR interface and then move into physical-layer testing (Figure 1).

20 January 2017

Back to Basics: Three-Phase Sinusoidal Voltages

Three-phase AC voltages consist of three voltage vectors
Figure 1: Three-phase AC voltages
consist of three voltage vectors
In a previous post, we briefly covered the basics of single- and three-phase AC power systems. Single-phase systems, as we've noted, comprise a single voltage vector with a magnitude (in VAC) and a phase angle. Of course, a three-phase voltage consists of three voltage vectors and three phase angles. This installment will go on to describe three-phase AC voltages in similarly brief fashion.