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benz
  Are you a good spectral citizen?   Note from Ben Zarlingo: This is the third in our series of guest posts by Nick Ben, a Keysight engineer. In this post he provides an overview of adjacent channel power, a measure of how well your products play with others.   In the previous edition of The Four Ws, I discussed the fundamentals of noise figure.… (Show more)
benz
  Spectrum crowding is bad, but I think interference is worse He’s guilty of some degree of hyperbole, but Lou Frenzel highlights a fundamental issue in his recent column Spectrum Apocalypse: The Coming Death of Wireless. We’re all aware of the limited nature of our shared spectrum resource, and Lou extrapolates to a future in which crowding… (Show more)
benz
  While some are timeless, others evolve This post will be brief, partly a consequence of the wildfires that have affected the Santa Rosa headquarters of Keysight and modified all our schedules, at least a little. Without getting too metaphysical, the fires and their aftermath are a powerful reminder that things are always changing. This is… (Show more)
benz
  A new RF tool leveraged two evolving technologies These days, vector signal analyzers (VSAs) are in broad use, especially in wireless, aerospace, and defense applications. They’re essential for designing the complex modulated and time-varying signals that have become ubiquitous. However, VSAs haven’t been around nearly as long as spectrum or… (Show more)
benz
  Even great minds fail sometimes, but we can revise our mental models Though this blog is created by a company that makes hardware and software, the core of our work—and yours—is problem solving and optimization. In the past, I’ve said that success in this work demands creativity, judgement, and intuition. I’ve also written (several times) about… (Show more)
benz
  Avoiding extra functionality in your circuits A common saying among electrical engineers is that if you want an oscillator, try building an amplifier. This is all too often accurate, and unwanted oscillations in amplifiers can be a problem for designs at almost any frequency, from very low to high. Of course, if you design an oscillator it… (Show more)
benz
  A pre-filter to manage an excess of information In the first two decades of the modern spectrum analyzer—say from the 1960s to the 1980s—it was arguably possible for an RF engineer to know almost everything about making spectrum measurements. One reason: the signals and the analyzers were relatively simple. Signals were generally assumed to be… (Show more)
benz
  When gems turn to coal, engineers get creative Despite their flaws, I have described YIG preselector filters as the gems in microwave signal analyzers. These preselectors solve a problem created when mixers are used to downconvert signals for analysis: The mixers produce multiple outputs from a single input frequency, including the main… (Show more)
benz
  Bring your best engineering game, and use all the measurement tools available The term Internet of Things (IoT) has been around a few years, and sometimes it feels over-hyped. When some folks start musing breathlessly about a near future in which virtually everything will be connected, it feels like they’ve taken the concept a little too far.… (Show more)
benz
  How about “ACA out of detent” Some people of my generation viewed the 1960s race to the Moon as an alternative to a military conflict, with the astronauts as the point of the spear. They were the space equivalents of fighter pilots, doing a more civilized kind of combat. Or maybe they were modern-day cowboys, taming the wildest frontier. I was… (Show more)
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