44 episodes

Inspired by over-the-cubical-wall conversations about the changing world of electronics and electrical engineering, Daniel Bogdanoff and Mike Hoffman created an electrical engineering podcast. Covering a broad range of topics from the basics of electrical engineering to the tough engineering problems of tomorrow’s technologies, Daniel & Mike bring in members of Keysight’s engineering team to provide their unique perspectives.

EEs Talk Tech - An Electrical Engineering Podcast EEs Talk Tech - An Electrical Engineering Podcast

    • Technology
    • 4.8 • 32 Ratings

Inspired by over-the-cubical-wall conversations about the changing world of electronics and electrical engineering, Daniel Bogdanoff and Mike Hoffman created an electrical engineering podcast. Covering a broad range of topics from the basics of electrical engineering to the tough engineering problems of tomorrow’s technologies, Daniel & Mike bring in members of Keysight’s engineering team to provide their unique perspectives.

    Measurement Overkill and why "Accuracy" is the Wrong Word

    Measurement Overkill and why "Accuracy" is the Wrong Word

    Metrology Podcast

    May 20th is a special day - World Metrology Day! Get a bit of history and learn about all things metrology when you join Daniel Bogdanoff, Bob Stern, and Chris Cox in this special Metrology Day electrical engineering podcast!

    App note mentioned by Bob: https://bit.ly/DecisionRules

    More about Keysight metrology, calibration, and services: https://www.keysight.com/find/metrology

    Topics and time tags:

    0:00 World metrology day, and a brief history of the meter and the ohm

    2:00 Keysight University has FREE test gear courses!

    2:45 Bob Stern, Keysight Metrologist Chris Cox, Keysight Regional Metrologist

    4:30 Why does metrology matter? How does it impact us? The global economy relies on a consistency of measurement and test, which is why metrology is important. It allows measurements made in one country to be used and replicated in other countries.

    7:25 Metrology and measurement traceability is important. An unbroken chain of traceability is one of the key components of metrology and calibration. It's a bit like a game of telephone leading back to SI units.

    10:00 Keysight DMMs get calibrated off the first commercially available Josephson Junction - a tool that uses quantum physics to provide a very stable voltage.

    11:16 Accuracy vs. Measurement Uncertainty A production engineer might say "accuracy" but really it's all about "measurement uncertainty" Vocabulary of international metrology (VIM): https://www.bipm.org/en/publications/guides/vim.html

    12:15 A practical example of how different instruments have different levels of uncertainty

    13:45 What's the significance of measurement uncertainty for a user of test gear or a production engineer?

    15:33 The internal adjustments that the factory makes to an instrument are some of the most closely guarded intellectual property / trade secrets.

    18:15 The Army uses mobile Josephson junctions to test the DMMs used in Apache helicopter field testing.

    18:45 Metrology overkills - times when people went overboard with their measurement uncertainty

    21:10 How do you quantify measurement uncertainty? There's "test uncertainty ratio" which uses your expanded measurement uncertainty.

    23:00 You can also get to percent risk, which is easy to wrap your head around. Bob Stern and Chris Cox authored some papers on this topic.

    24:00 Why do people make measurements in the first place? There are no perfect measurements

    26:45 Metrology in the government/military vs. private sector

    29:00 There are a lot of factors for metrology equipment calibration and the engineering metrology equipment. There are different "levels" of calibration and different depth of reporting

    • 33 min
    Life Lessons from electroBOOM! - DON'T PLAY WITH HIGH VOLTAGE! (Mehdi Sadaghdar Interview)

    Life Lessons from electroBOOM! - DON'T PLAY WITH HIGH VOLTAGE! (Mehdi Sadaghdar Interview)

    That time Mehdi almost died on camera, science & tech on YouTube, 50 takes of the same scene, and more life advice from Mehdi Sadaghdar, aka electroBOOM! Join Mehdi and Daniel Bogdanoff in an random park in downtown New York City in this electrical engineering podcast episode.

    Mehdi is awesome check him out at: https://www.youtube.com/electroboom

    Episode sponsored by the 5G track, everything you need to know about 5G everything: https://www.keysight.com/find/LEARN5G



    Approximate time tags:

    He gives away tools to people that actually need it

    electroBOOM is bringing electronics and electrical engineering to the mainstream

    Science channels are really growing on YouTube

    How much does Mehdi prepare for his videos?

    Most of Mehdi's mistakes and explosions are planned and scripted

    The comment section is always interesting

    Mehdi has a Master's Degree in Electrical Engineering

    He doesn't have a very good pain tolerance

    He has a hard time keeping a straight face when something's coming in the video

    Jacob's Ladder project - he almost died and learned that he should not be a mechanical engineer
    "I would be dead if it wasn't for my flimsy wiring…"

    Before he became a full time YouTuber he worked doing electronics for a boating steering and control company

    Mehdi got his undergrad degree in Iran, Master's in Canada

    How Mehdi got into electronics - one of his relatives got him an electronics kit as a kid and he loved it

    electroBOOM is not as good of a channel name as his daughter's channel, electroCUTE

    Mehdi works really hard on his videos

    Most underrated joke: "I don't have a very long term memory"

    Mehdi's wife didn't used to like his videos, she thought they were boring. But, she's since come around

    He watches PewDiePie and lots of science channels

    Mehdi and "Mr. Tripod" do all his production work

    The content is what matters, it's not about the production value

    Every paragraph that he reads, he tries it 10 - 50 times so that it comes out straight. Usually it's just the last take that he keeps

    Is it "recording" or "taping"? Can you still say "taping?"

    Batteries can explode in beautiful ways

    what other good science channels do you recommend?
    Cody's Lab, Smarter Every Day, Veratisium, The Sci Show

    Follow Mehditation on YouTube as well: https://www.youtube.com/mehditation

    If you really want to learn electronics, you must experiment. Just pickup some random project, start building, and you will learn.
    And if you don't care about electronics, do something else. I don't know…

    …but don't play with high voltage!

    • 21 min
    Little Big Power: Femtoamps and Regenerative Supplies

    Little Big Power: Femtoamps and Regenerative Supplies

    When power systems get ridiculous...

    Power goes way beyond basic bench power supplies. Daniel Bogdanoff sits down with Chris Cain to explore femtoamp measurements, 100 kV multi-quadrant regenerative power systems, noise, and space-borne solar arrays in this EEs Talk Tech electrical engineering podcast!


    Learn more about the Keysight RP7900 regenerative power systems (RPS) and the Keysight CX3300 Dynamic Current Analyzers

    Recording from New Jersey with Chris Cain, who manages teams for electronic industrial products, like power, DMMs, function generators, DAQs, board test, etc.

    Current analyzer behind us measures FEMTOAMPERES of current. This is useful for RF and IoT systems.

    Chris’s most spectacular equipment failure – a new engineer put their electrolytics in backwards

    For extra large electrolytic capacitors people design vent holes in PCB 8:15 High power power supplies. 5kW and 10 kW power supplies

    Two quadrant power supplies vs. one quadrant power supplies

    A 100 kV power supply!? What’s that used for? Battery emulation for things like electric cars. The supply has to be able to both source and sink power, and switch between the two very quickly

    A regenerative power supply (RPS) rectifies input voltage and puts it back on the AC mains instead of dissipating it as heat like a normal electronic load. So, the overall cooling requirements are very different for an RPS than a normal electronic load. One of the big costs for industrial factories is air conditioning and heat management. So, a regenerative power supply is very useful because it reduces heat.

    Regenerative power supplies are also useful for testing photovoltaic inverters, for both terrestrial and space solar systems.

    Noise parameters for high power systems

    Power is very complex, and the systems are very dynamic

    Giant toroidal transformers are used for power supplies and are dynamically controlled. They also are leveraged from systems like source measure units (SMUs).

    Precision current measurement is very different than measurement, it often uses a triax

    Some systems have 5 or 6 wire measurements to help with guardbanding

    • 28 min
    5G, Beamforming, & MIMO

    5G, Beamforming, & MIMO

    5G means business. With wired speeds coming in over the air, designers are turning to new wireless techniques like beamforming, MIMO, and advanced tower synchonization designed to pump you full of bits. Find out more as Daniel Bogdanoff sits down with Brig Asay and Joe Haver to discuss the changing wireless ecosystem of tomorrow.




    4G was sub 6 GHz, but 5G is much higher frequencies (24 GHz, 28 GHz, 39 GHz, and above 50 GHz)

    4G test strategies: simple source and a middle-of-the-line signal analyzer. There were also some combo boxes that were both signal sources and signal analyzers.

    5G testing requires more powerful setups. There are still generators, but they have to be more powerful. FR2, 100 MHz, 200 MHz, 400 MHz wide bands make things more complicated.

    Chambers and OTA (over the air) testing and MIMO systems make things much more complicated.

    And, a 5G system has to cover all of these ranges.

    MIMO for 5G - MIMO means "Multiple Input Multiple Output"

    Beamforming is also being implemented. Designers need to be able to test and see all the 5G signals at once.

    7:00 Beamforming explanation and discussion - essentially beams can be directed with constructive and destructive interference to send signals to UEs (user equipment).

    5G beamforming significantly increases the power delivered to a UE. Want to try it? Try "Build a beam" here: https://www.keysight.com/main/editorial.jspx?cc=US&lc=eng&ckey=2800374

    5G brings wired-level speeds to wireless systems, which will open up brand new markets that haven't even been defined yet.

    5G security

    Are 5G bandwidths a challenge? A wider carrier channel means more interference and a lower effective number of bits / SNR (signal to noise ratio). So, the wide 5G bands require a more robust design. This is especially true for distance.

    Even windows are potentially a challenge with 5G frequencies, so beamforming becomes critical.

    Testing 5G with a signal analyzer / spectrum analyzer - is it doable? Sorta... How do you look at four distinct bands at one time?

    The UXR oscilloscope can actually look at multiple bands at once at 0.5 EVM (error vector magnitude).

    Why does 5G have so many different frequencies and bands? Isn't that excessive?

    Will 5G make it where I can get rid of my home internet provider?

    Beamforming from a cell tower is pretty easy, but it's much harder for a handset. So, there are systems that propose 5G downlinks, but 4G or 3G back up to the tower.

    Multiple towers can talk to the same handset AT THE SAME TIME! Multiple towers can provide the same packet at the same time to the same UE to increase the power. This means they are all working on the same clock as well.

    There are a number of ways to synchronize multiple cell towers at the same time. GPS is common, but there are a number of other feasible technologies.

    Brig has to get in his "vicious Keysight plug" for the mmWave extension on the UXR that lets an oscilloscope behave like a signal analyzer. It also uses a 1mm connector on the front end.

    Stupid question: if you had to describe 5G using five words that start with "G" what would they be?

    • 34 min
    USB4 - No more Mr. Nice Guy, your USB-C connector has to do it all!

    USB4 - No more Mr. Nice Guy, your USB-C connector has to do it all!

    New tunneling modes, the scoop on plugfests, and 40 Gbps!

    Get the FREE! Tech Tip eBook about testing 6 emerging technolgy standards: http://bit.ly/PodcastTechTrends

    Subscribe on YouTube ► http://bit.ly/KeysPodcastSub ◄

    It feels like USB 3.2 just came out, but USB4 is HERE! With USB4, gone are the days of wondering what's behind that USB Type-C connector - all the functionality is mandatory. And, you get double the speed! 40 Gbps over two 20 Gpbs lines keeps Moore's law happy (which makes us happy).

    Find out more in today's podcast with Jit Lim, Mike Hoffman, and Daniel Bogdanoff.

    Video version:

    Twitter: @DanielBogdanoff:

    Subscribe with your podcast tool:






    Notes & Topics:

    The USB-IF released the USB4 Spec in September
    USB4 requires that you use the USB Type C connector
    USB4 is fully backwards compatible
    USB4 uses a 20 Gbps x2 link (pronounced "by two") so Moore’s law still holds (yay!)
    USB 3.2 took 10 Gbps and doubled it to 20 Gbps

    It’s USB4 not USB 4.0 and not USB 4 (confirmed)

    With USB4 you must implement USB-PD (USB Power Delivery), but in the past it was optional.
    USB4 brings a doubling bitrates, you must use Type C connector, and must be backwards compatible all the way to USB2

    USB 3 and USB 3.2 had a lot of alternate modes, but USB4 implements a tunneling mode. With tunneling allows you to send packets of USB, DisplayPort, or PCIe inside of the USB protocol. This means you don’t have to run it as an alternate mode, which requires extra silicon.

    The silicon is often prototyped before a spec is actually released, so that the spec can match reality and be possible to build.

    USB4 is already being prototyped and tested. At the USB workshop-plugfest
    USB plugfests are very secret, and company names aren’t used. They use a “test ID number” instead of company name, and the attendance is very limited. In many cases, only Keysight and the company testing their device are allowed to be in the room while the testing is done.

    A “Compliance Test Spec” describes how you test a device against a specification. Because, you can’t test for every single thing in the spec, but you can test a subset of things to verify performance.


    Will USB take over everything? It depends on the other organizations and specifications groups. There are other ecosystems and organizations like VESA (DisplayPort) and HDMI that are autonomous. But, both HDMI and VESA have a USB Type-C mode that allows the protocols to work over a USB Type C connector

    USB4 implementation is very complex! The different speeds that could be used are pretty complex. USB4 is advertised 40 Gbps, but it’s actually 20 Gbps x2.

    It can be 5 Gbps, 10 Gbps, 20 Gbps, and run at x1 or x2, and it can also do alt modes.

    Are there any main competitors to USB4? What about the lightning connector from Apple?

    There’s evidence that there will be a USB4 native display, and some high end USB4 monitors already exist.

    USB4 is coming, and if you want to be on the leading edge you better get started now (and why)!

    38:20 - stupid questions:
    When will see USB5? What’s the lamest way someone could use USB4?
    If USB4 is truly universal, shouldn’t it go into space?

    Helpful Links:

    Keysight Bench Facebook page:

    Keysight RF Facebook page:

    EEs Talk Tech Electrical Engineering podcast:

    • 41 min
    Teaser: EEs Talk Tech Season 2

    Teaser: EEs Talk Tech Season 2

    It ain't over. We're back with a hot new season, premiering November 21, 2019!

    Google Play and Google Podcasts:

    • 1 min

Customer Reviews

4.8 out of 5
32 Ratings

32 Ratings

Cmos Eisley ,

Tech podcast

Great content. More, please!!

JoelS33 ,

Binge Worthy for EE’s

As a product designer, I found this podcast to be really interesting and enjoyable to listen to. Keep it up with other topics. I particularly enjoyed the USB4 and 5G discussions.

Whopperjaw MD ,

Excellent podcast

This podcast is interesting and entertaining. I always look forward to listening.

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