Daniel Bogdanoff
@DanielBogdanoff
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Follow for geek stuff. Engineering, electronics, 3D printing. 'Resident Geek' @Keysight, host of Moore's Lobby podcast. Makes videos. Find me kinda everywhere!
Colorado Springs, CO
Joined April 2015
Rance button is π₯π₯.
Facebook marketplace listing for a Fluke multimeter, see if you notice anything strange in the image:
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Every undergrad electrical engineering test be like.
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Noise Figure - an RF Engineering measurement that tells you how much (or little) a device will impact your SNR
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I missed being on this site, time to pop back in I think!.
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An actual photo of me trying to do literally anything productive around the house on my days off. Somehow I started the task of putting groceries away and ended the task by building a garage storage rack out of spare 2x4 cutoffs
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Today I got a hilarious and wonderful Christmas surprise in the mail from @MakeAugusta!. Not in a million years would I have been able to guess what was in this package when he told me something was headed my way. David does pcb event badges and design - all USA made - 100%
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RT @BreakingTaps: EE friends: anyone know of a constant current driver breakout board that can source say 0-3A at 0.5-1V, with an input volβ¦.
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Pulled from the source code of a page, re: the Bambu 3d printer leak
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In many ways, the Signal Analyzer is a better tool, but there are situations where the oscilloscope is the thing you need. And an EVM <.6% is pretty darn okay!
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IF you are willing to give up some of the really-nice-RF-performance from a Signal Analyzer in order to get wider bandwidths, a real time oscilloscope has become a viable option.
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Here's a 5G NR OFDM signal being decoded on a scope
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So you don't have to look at 0 Hz - 110 GHz, you can just work on, say, 65 GHz - 75 GHz and IGNORE the rest of the signal, cutting down 1/f noise.
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The scopes can essentially bake-in a 5 GHz or 10 GHz or 30 GHz bandpass filter anywhere in it's 110 GHz range.
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Here's where the scope + some specialty hardware & software design comes in
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A very high-end signal analyzer will give you a couple GHz of bandwidth max
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Traditionally you measure these signals with a Signal/Spectrum Analyzer, but bandwidth comes at a steep cost. And, you simply cannot get 110 GHz (or even 5 or 10 GHz) of bandwidth on a signal analyzer.
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But, lots of modern RF tech uses very wide bandwidths (multiple GHz), historically we were looking at 10s or 100s of MHz.
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So, a rule of thumb is that if you want the lowest noise, use a very small bandwidth (frequency range).
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So, the wider your bandwidth, the more noise you are going to have. You'll have a "higher noise floor".
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A 110 GHz scope is noisy for RF measurements, because noise is directly related to your bandwidth (the amount of spectrum you're looking at). 1/f noise, or "pink noise"
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