New 110 GHz Oscilloscope – UXR Q&A #35

Brig Asay, Melissa, and Daniel Bogdanoff sit down to answer the internet’s questions about the new 110 GHz UXR oscilloscope. How long did it take? What did it cost? Find out!

Brig Asay, Melissa, and Daniel Bogdanoff sit down to answer the internet’s questions about the new 110 GHz UXR oscilloscope. How long did it take? What did it cost? Find out!


Some of the questions & comments

S K on YouTube: How long does it take to engineer something like this? With custom ASICs all over the place and what not…

Glitch on YouTube: Can you make a budget version of it for $99?

Steve Sousa on YouTube: But how do you test the test instrument?? It’s already so massively difficult to make this, how can you measure and qualify it’s gain, linearity etc?

TechNiqueBeatz on YouTube: About halfway through the video now.. what would the practical application(s) of an oscilloscope like this be?

Alberto Vaudagna on YouTube: Do you know what happen to the data after the dsp? It go to the CPU motherboard and processed by the CPU or the data is overlayed on the screen and the gui is runner’s by the CPU?

How does a piece of equipment like that get delivered? I just don’t think UPS or Fedex is going to cut it for million+ dollar prototype. It would be nice to see some higher magnification views of the front end.

Ulrich Frank:mNice sturdy-looking handles at the side of the instrument – to hold on to and keep you steady when you hear the price…

SAI Peregrinus: That price! It costs less than half the price of a condo in Brooklyn, NY! (Search on Zillow, sort by price high to low. Pg 20 has a few for $2.7M, several of which are 1 bedroom…)

RoGeorgeRoGeorge: Wow, speechless!


Maic Salazar Diagnostics: This is majestic!!

Sean Bosse: Holy poop. Bet it was hard keeping this quiet until the release.

jonka1: Looking at the front end it looks as if the clock signal paths are of different lengths. How is phase dealt with? Is it in this module or later in software?

cims: The Bugatti Veyron of scopes with a price to match, lol

One scope to rule them all…wow! Keyesight drops the proverbial mic with this one

Mike Oliver: That is a truly beautiful piece of equipment. It is more of a piece of art work than any other equipment I have ever seen.

Gyro on EEVBlog: It’s certainly a step change in just how bad a bad day at the office could really get!
TiN: I have another question, regarding the input. Are there any scopes that have waveguide input port, instead of very pricey precision 1.0mm/etc connectors?
Or in this target scope field, that’s not important as much, since owner would connect the input cable and never disconnect? Don’t see those to last many cable swaps in field, even 2.4mm is quite fragile.

User on EEVBlog: According to the specs, It looks like the 2 channel version he looked at “only” requires 1370 VA and can run off 120V.  The 4 channel version only works off 200-240V

The really interesting question: how do they calibrate that calibration probe.
They have to characterize the imperfections in it’s output to a significantly better accuracy than this scope can measure.  Unless there’s something new under the sun in calibration methodology?

Mikes Electric Stuff‏ @mikelectricstuf: Can I get it in beige?

Yaghiyah‏ @yaghiyah: Does it support Zone Triggering?

User on Twitter:

It’ll be a couple paychecks before I’m in the market, but I’d really be interested in some detail on the probes and signal acquisition techniques. Are folks just dropping a coax connector on the PCB as a test point? The test setup alone has to be a science in itself.

I’d also be interested in knowing if the visiting aliens that you guys mugged to get this scope design are alive and being well cared for.

Hi Daniel, just out of curiosity and within any limits of NDAs, can you go into how the design process goes for one of these bleeding-edge instruments? Mostly curious how much of the physical design, like the channels in the hybrid, are designed by a human versus designed parametrically and synthesized

How Internet is Delivered – Data Centers and Infrastructure – #12

Laser Netflix delivery, backyard data centers, and how the internet gets delivered to homes and businesses. This week’s podcast guest is optical guru Stefan Loeffler. Hosted by Daniel Bogdanoff and Mike Hoffman, EEs Talk Tech is a twice-monthly engineering podcast discussing tech trends and industry news from an electrical engineer’s perspective.

Laser-delivered Netflix and backyard data centers!

The conversation continues with optical communications guru, Stefan Loeffler. In this episode, Daniel Bogdanoff and Mike Hoffman discuss optical infrastructure today and what the future holds for optics.

Video version (YouTube):


Audio Version:

Discussion Overview:

Optical Communication Infrastructure 00:30

Optics = Laser-driven Netflix delivery system

Client-side vs line-side 1:00

Line-side is the network that transports the signals from the supplier to the consumer

Client-side is the equipment that is either a consumer or business, accepting the data from the network provider.


Yellow cables in your wall indicate presence of fiber 1:40

Technically, optics is communication using radiation! But it is invisible to us as humans. 2:20


Getting fiber all the way to the antenna is one of the major new technologies 2:30

But this requires you to have power at the antenna 2:45

However, typically there is a “hotel” or  base station at the bottom of the antenna where the power is and where fiber traditionally connects, instead of up to the antenna

Really new or experimental antennas have fiber running all the way up the pole  3:28


Network topologies- star, ring, and mesh 3:42

Base stations are usually organized in star-form, or a star network pattern. A star network starts at a single base station and distributes data to multiple cells

Rings (ring networks) are popular in metro infrastructure because you can encircle an entire area 4:20

Optical rings are like traffic circles for data.

Is ring topology the most efficient or flexible? 6:20

An advantage of ring and mesh topologies is built-in resilience

Mesh topologies have more bandwidth but require more fiber optic cable 7:10

How often is the topology or format of a network defined by geography or regulations? 8:30


How consumers get fiber 9:20

Business or academic campuses typically utilize mesh networks on the client side, subscribing to a fiber provider

Fiber itself or a certain bandwidth using that fiber can be leased

If you’re a business, like a financial institution, and latency or bandwidth is critical, leasing fiber is necessary so you have control over the network 9:45


What’s the limiting factor of optical? 

What are the limitations of the hardware that’s sending/receiving optical signals? 11:08

Whatever we do in fiber, at some point, it is electrical 11:27

There will be a tipping point where quantum computing and photon-computing (optical computing) comes into play 11:40

Will optical links ever compete with silicon? Maybe we will have optical computers in the future 12:02

The limiting factor is the power supply 12:40

What’s costing all this energy? 12:58

The more data (bits and bytes) we push through, the more energy in the form of optical photons or electrons we are pushing through. We also must use a DSP for decoding which costs energy

One of the first 100 Gb links between two clients was between the New York Stock Exchange and the London Stock Exchange 14:00


The evolution of the transmission of data 14:45 

Will we ever have open-air optical communication? 15:50

RF technology uses open-air communication today, but it is easy to disturb

The basic material fiber is made of is cheap (silica, quartz), and can be found on any beach 16:08

Whereas copper has a supply problem and, thus, continues to increase in price


Other uses for optical 16:33

Crystal fiber and multicore fiber is being experimented with to increase the usable bandwidth

Optical, as waveguides, can be built into small wafer sections 17:15

Optics is used in electrical chips when photons are easier to push through than electrons

Cross-talk can happen with optical, too 18:13

Testing is done with optical probing, which works because of optical coupling

Optical-to-electrical converter solution 


Optical satellite communication 19:48

Hollow-fiber could be used in a vacuum, such as space

The refractive index of the fiber’s core is higher than the cladding, which guides the optical signal through 21:05

A hollow-fiber would be like a mini mirror tube


Optical data transmission 21:25 

Higher carrier frequencies means you can modulate faster, but there’s more loss and dispersion

This means optical communication could be harder in open-air vs. in traditional fiber 22:45

70-80% headroom is typical

The congested part of a network drives the change in technology. 24:25


Mega data centers vs. distributed data centers 

Cooling and power is important so big data centers are being built by Google, Facebook, Netflix in places where cheap, cool water is abundant 24:30

Distributed data centers are becoming more popular than mega-data centers 24:55

All images on Facebook have “cdn” in the URL because the image is hosted on a content distribution network, or cloud

Data centers are described by megawatts (MW) of power, not size or amount of data processed 26:20

Internal data center traffic takes up about 75% of the traffic 27:47

Distributed networks utilize a mesh network and require communication between networks


Telecom starts using faster fiber when about 20% of the fiber is used 28:55

This 20% utilization is also common in CAN busses because of safety-critical data communication

Uptime guarantees require the Telecom industry to keep this number at 20%


Keysight optical resources and solutions  31:00

Predictions 31:45

Also, check out our previous conversations with Stefan about Optical Communication 101 and Optical Communication Techniques.

Copper vs. Fiber Optic Cable and Optical Communication Techniques – #11

Stefan Loeffler discusses the latest optical communication techniques
and advances in the industry as well as the use of fiber optic cable in electronics and long-range telecommunication networks. Hosted by Daniel Bogdanoff and Mike Hoffman, EEs Talk Tech is a twice-monthly engineering podcast discussing tech trends and industry news from an electrical engineer’s perspective.

Mike Hoffman and Daniel Bogdanoff continue their discussion with Stefan Loeffler about optical communication. In the first episode, we looked at “what is optical communication?” and “how does optical communication work?” This week we dig deeper into some of the latest optical communication techniques and advances in the industry as well as the use of fiber optic cable in electronics and long-range telecommunication networks.

Video version (YouTube):


Audio Version:


Discussion Overview:


Installation of optical fiber and maintenance of optical fiber

We can use optical communication techniques such as phase multiplexing

There’s a race between using more colors and higher bitrates to increase data communication rates.

Indium doped fiber amplifiers can multiply multiple channels at different colors on the same optical PHY.

You can use up to 80 colors on a single fiber optic channel! 3:52

How is optical communication similar to RF? Optical communication is a lot like WiFi 4:07

Light color in optical fiber is the equivalent of carrier frequencies in RF


How do we increase the data rate in optical fiber?

There are many multiplexing methods such as multicore, wavelength division, and polarization 4:50

Practically, only two polarization modes can be used at once. The limiting factor is the separation technology on the receiver side. 6:20

But, this still doubles our bandwidth!

What about dark fiber? Dark fiber is the physical piece of optical fiber that is unused. 7:07

Using dark fiber on an existing optical fiber is the first step to increasing fiber optic bandwidth.

But wavelengths can also be added.

Optical C-band vs L-band 7:48

Optical C-band was the first long-distance band. It is now joined by the L-band.

Is there a difference between using different colors and different wavelengths?

Optical fibers are a light show for mosquitos! 8:30


How do we fix optical fibers? 10:36

For short distances, an OTDR or visual light fault detectors are often used by sending red light into a fiber and lights up when there’s a break in the fiber


Are there other ways to extend the amount of data we can push through a fiber? 11:35

Pulses per second can be increased, but we will eventually bleed into neighboring channels

Phase modulation is also used

PAM-4 comes into play with coding (putting multiple bits in a symbol)

And QAM which relies on both amplitude and phase modulation

PAM-4 test solutions

How do we visualize optical fibers?  14:05

We can use constellation diagrams which plot magnitude and phase


Do we plan for data error? 15:00

Forward error correction is used, but this redundancy involves significant overhead



64 Gigabot (QAM-64) was the buzzword at OFC 2017 16:52

PAM is used for shorter links while QAM is used for longer links


How do we evaluate fiber? 18:02

We can calculate cost per managed bit and energy per managed bit

Energy consumption is a real concern 18:28


The race between copper and fiber 19:13

Fiber wins on long distance because of power consumption

But does fiber win on data rate?

Google Fiber should come to Colorado Springs…and Germany!

To compensate for the loss of the signal on the distance, you push more power in for transmitting and decrypting

Fibers attenuate the signal much less than copper does

But the problem comes when we have to translate the signal back into electrical on the receiving end

Is there a break-even point with fiber and copper? 22:15


Optical communication technology in the future

What speed are we at now and what’s the next technology? 23:05

600 G technology will be here eventually

We can expect 1.5 years between iterations in bandwidth. This is really slow in terms of today’s fast-paced technology.

We typically see 100 G speeds today


Predictions 26:00