This year's OFC in San Francisco featured one thing, or so it seemed: 1.6T. Every company making optical modules was showing them lest they be left behind in the always accelerating data rate race. As with any emerging technology, test equipment must … [Read More...] about OFC 2025: Test equipment
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FROM THE EDITORS
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Aimee Kalnoskas
Ethernet/LXI digitizers feature 12-bit resolution and up to 4.7 GHz bandwidth -
Martin Rowe
OFC 2025: Test equipment -
Rick Nelson
How to use convolution to implement filters: part 4 -
Emma Lutjen
Design World presents the 2024 LEAP Awards Winners: Test & Measurement -
Kenneth Wyatt
Characterize EMI from dc-dc converter ringing
FAQs
Phone chargers produce EMI: We compared four
The switching power supplies that regulate output voltage produce radiated emissions. Our tests compare waveforms that give clues as to how the chargers operate. While evaluating the Uni-T UPO1202 oscilloscope, I used the Uni-T UTG962E Function/Arbitrary Waveform Generator and noticed some … [Read More...] about Phone chargers produce EMI: We compared four
Characterize EMI from dc-dc converter ringing
Switching power supplies produce radiated and conducted emissions caused by ringing. Oscilloscope and spectrum-analyzer measurements let you see them. DC-DC converters are ubiquitous in most electronic products. While more efficient than linear regulators, they can also produce considerable … [Read More...] about Characterize EMI from dc-dc converter ringing
Review: Micsig TO3004 tablet oscilloscope
If you're looking for a portable oscilloscope for field troubleshooting or for demonstrations, look at the Micsig TO series. Here's my take on the four-channel 300 MHz variant, TO3004. The Micsig TO3004 oscilloscope (Figure 1) is an 8-bit, four-channel, tablet-sized portable oscilloscope … [Read More...] about Review: Micsig TO3004 tablet oscilloscope
How to use convolution to implement filters: part 4
A windowed sinc function can implement a low-pass filter, and a two-dimensional convolutional filter can blur or sharpen images. In part 3 of this series, we introduced a low-pass filter based on the Sinc function and described the need for windowing to compensate for sampling and … [Read More...] about How to use convolution to implement filters: part 4
Why engineers need IC ESD and TLP data
Design Engineers need ESD and TLP characterization data to make informed decisions to design robust circuits and systems. Engineers often review semiconductor data among several manufacturers when designing a circuit or system. While two or more ICs may perform satisfactorily under normal … [Read More...] about Why engineers need IC ESD and TLP data
How to use convolution to implement filters: part 3
A windowed sinc filter outperforms a moving-average filter in the frequency domain. In part 2 of this series, we described a type of convolution filter called the moving-average filter, and we demonstrated that it is effective at removing Gaussian white noise in the time domain but performs … [Read More...] about How to use convolution to implement filters: part 3
How to use convolution to implement filters: part 2
A moving-average filter can address white noise in the time domain but performs poorly in the frequency domain. In part 1 of this series, we defined convolution, denoted by the * symbol, and looked at a simple geometrical example of how it operates to produce a new function y(t) from two given … [Read More...] about How to use convolution to implement filters: part 2
How to use convolution to implement filters: part 1
Convolution is used in a variety of signal-processing applications, including time-domain-waveform filtering. In a recent series on the inverse fast Fourier transform (FFT), we concluded with a mention of convolution and its application to filtering. Convolution Q: What is convolution? A: … [Read More...] about How to use convolution to implement filters: part 1
What is second generation beamforming?
Second-generation beamforming refers to advanced designs using more sophisticated signal processing algorithms, larger antenna arrays, and the ability to generate higher quality, more focused beams that dynamically adapt to user movement and changing environments. This article looks at how basic … [Read More...] about What is second generation beamforming?
How are NRZ and PAM different in an eye diagram?
Eye diagrams are important tools in telecommunications for analyzing the performance of digital signals, such as noise, distortion, and intersymbol interference. This FAQ compares the non-return-to-zero (NRZ) and pulse modulation (PAM) formats, which are common ways of reading an eye diagram. NRZ … [Read More...] about How are NRZ and PAM different in an eye diagram?
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What is the importance of resolution in an oscilloscope?
When looking at the oscilloscope feature of a multi-instrument device or when comparing two benchtop oscilloscopes, the first specifications that we look at are the bandwidth and sample rate. While these are incredibly important specs, often most design work is done well within the limits of most products and the more critical specification to consider is resolution. Did you know that while most […]
