Viewing profile — btoptical

These are great saws. The founder originally just wanted to sell his safety device to table saw manufacturers. He had no takers so he started his own company. My next door neighbor…

Really none of that is correct. Firstly it's not at all equivalent to an AM radio. It is an AM modulated carrier but that's about it. The detection scheme direct detection and not …

While impressive it's not clear why such a low phase noise oscillator is needed. This oscillator looks like it takes up lots of space and power. So some justification for the devic…

Let's figure out just how much area we need for solar panels. The US consumes about 19.05M barrels of oil per day. Each barrel of oil is about 1.6 MWh of power. So this is 31017210…

Yes, a conventional 2-port MMI will generally give you a pi/2 phase shift of one port relative to another. If you combine the 2 ports again with another MMI, you have built a Mach-…

She also spun out the original HP business of test and measurement equipment, chips, transceivers, etc as Agilent (now Keysight). I never ever thought of HP as a computer company. …

Kind of the stuff of science fiction but...I can imagine that if we could put someone in a medical induced coma for a long-period of time, sort of like suspended animation, we coul…

A better non-paywall source is here: http://www.lightreading.com/business-employment/how-do-nokia... ? Includes discussion of how such a merger would affect Juniper. Juniper is ALU…

I've been to lots of them all over the world, names you'd recognize, and they've all had 48V.

These big switch boxes typically end up being about thermal management and this box looks like thermal design was an afterthought. Also I'm not sure the power entry design is reall…

The Whole Foods in Almaden (affluent South San Jose) hires off-duty San Jose PD to provide security. The officers are in full uniform and carry their utility belt and service weapo…

Error Correction Coding is hardly mundane and in modern communication systems far from trivial. There is a lot more to ECC than Reed-Solomon. Basically nothing in our digital world…

You may also like this: http://youtu.be/CIZNh1G2vNI This guy built a fully functional scale model of a Ferrari 310 including the V12 engine all from photos. He built every part. He…

Yep at Univ. of Rochester as physics undergrads we were often allowed a single sheet of paper with anything on it (we were told no microfiche!). I did a few open book exams but sti…

It's easier to lay a subsea cable than to go overland in remote areas. Take a look at the subsea map of Africa as an example. In Africa the subsea links are there because it's too …

In some cases the cable is buried on the sea floor by a special plow. It's incredible that the cable can be buried up to 6m deep in the mud on the bottom. Cable burial is intended …

Yes. It's a 100G service though. Infinera runs on 25G spacing so at 25G dual wave dual polarization is 100G in the same spectral efficiency as single wave.

See for example: http://newswire.telecomramblings.com/2013/01/telstra-global-... So you have to separate the "wet" plant from the terminal gear. The speed of the terminal gear is c…

Nope this will be 100G per wave not 40G. 40G was a stop-gap technology that never really shipped in large volume. With the advent of coherent optical, everyone just went to 100G (e…

Nope, the new fiber will be high dispersion compared to the old fiber and also will not have dispersion compensation along its length. The old cable was designed for OOK signaling.…

A fiber is point-to-point unless there's an add/drop along the way. A submarine cable is point-to-point between say California and Japan or New York and Southampton. That 5GHz radi…

If you'd like a different perspective regarding the quality of your broadband connection and the reasons for congestion this is a good read that basically says ATT at least does no…