|Joel Probing a High Speed Serial Signal with a Tektronix BERTScope|
Most engineers don’t remember their first network analyzer, but they all remember their first oscilloscope. A first oscilloscope to an engineer is a rite of passage. Most people think of their childhood and remember their first kiss, their first beer, their first car. Engineers remember their first oscilloscope, and it always holds a special place in their heart (not to say we neglect the other firsts….).
Please add to the comments of this post and tell me about your first oscilloscope – even if it’s not Tektronix, I’d love to hear the story!
In the world of oscilloscopes, one company owns more than half the market and is about the oldest name in the industry, Tektronix. That is my company, and though my blog will be technologically focused (and not one big ad for Tektronix), I will often use Tektronix oscilloscopes for illustration due to the fact that they are the industry standard and I do work for Tektronix. Tektronix consistently leads the industry in bandwidth, noise performance, effective number of bits, and sampling rate. It is a technology driven company and that shows in the many products that have come out over the years. Other companies may occasionally beat Tektronix to a performance mile mark, but over the years, Tektronix stays consistently ahead as the market leader. In my humble opinion, Tektronix also understands how an engineer uses an oscilloscope and still has the best user interface in the industry.
|First Trigger Oscilloscope - Tektronix 511|
One thing I love about working for Tektronix is that you can find circuits in textbooks developed by Tektronix engineers, and 65 years of patents on technologies we take for granted today. Tektronix innovated many display techniques for CRT’s and even invented the technology behind Plasma TV. And of course, whenever Hollywood wants a laboratory to look high-tech, they always have a Tektronix scope on the rack.
When John Locke sat at the computer in “Lost” typing those digits again and again, two Tektronix 502A Dual Beam Oscilloscopes sat behind him, doing something really important (although they never explained what!). These dual beam oscilloscopes were immensely popular, and it is cool to see them immortalized in one of the best TV shows in recent times.
When I show a customer a new Tektronix MSO4104B, I am often treated to a story about their first Tektronix scope and how it changed their life. Did I mention it is great to work for a legendary company?
Another major player in the world of test and measurement is Agilent (formerly known as Hewlett-Packard or HP). Mostly known for their RF portfolio (spectrum analyzers and network analyzers), they have been in the oscilloscope market for many years. They are still a distant number 2 player to Tektronix, but have made many improvements to their portfolio recently. Having lagged Tektronix in bandwidth for the past 5 years, they finally introduced a higher bandwidth real-time scope last year to claim bandwidth leadership (for now….). Recently, they introduced their own line of bench scopes, after selling OEM-labeled Rigol scopes for many years. In the world of oscilloscopes, they are a solid #2.
Rohde is a pretty exciting newcomer to the oscilloscope world. Rohde is a premier RF company based in Germany, and for years the Tektronix sales force established their name in the United States, primarily competing with the Agilent RF portfolio. Their relationship ended several years ago, and Rohde really only participated in the low end of the oscilloscope market through their Hameg oscilloscopes. Last year, Rohde made headlines with a new oscilloscope family going up to 2GHz. Key features they advertise are the digital trigger, fast update rate, rapid FFT processing (spectral analysis), and adjustable display grids. They are still a small player, but that could change in the future.
That’s the world of oscilloscopes, and I hope to blog at least once a week on a topic I find interesting, or one suggested to me by a customer or a reader. In the future, I plan to discuss what to look for in a new scope (bandwidth, sample rate, memory, ENOB, update rate, application support, probing, etc) and what to look for in a low-cost used oscilloscope. I hope to keep my blog applicable to a home hobbyist with a $500 oscilloscope and to a power-user designing PCI-Express Gen 3 interfaces, Wideband Satellite Communication, or Radar systems. I welcome comments as well, but please keep discussions civil.
As I said above, please fill in the comments of this article with some memories of your favorite first oscilloscope.
My name is Mikael Nielsen and i'm an electrician from denmark. I'm currently looking in to buying an oscilloscope, in the 6000-7000$ range.
It has to be able to log data for an extended period of time, and several channels simultaneously. The signals i'm looking at are ranging from 1-10v dc encoder signals, to 160-200A current consumption. What to buy?
Hi Joel, just happened across your blog. Keep the scope articles coming, I too am looking at a scope possibly a MSO4054B. I'd like segmented memory which is available on the 5000 series but am not that keen on Windows. Was all set to buy but am now just holding my breath for http://www.scoperevolution.com/ReplyDelete
Fingers crossed it's in my price range.
Oh yes, first scope I used during my studies was an HP54600B, funnily enough now I am self employed that's what I am back to. Used to love the built in Tetris feature. Used a lot of Tek in the UK and grew to love it.
You mention LeCory invented the DSO in 1985. Tektronix introduced the 468 oscilloscope in 1982. Tek added digital storage to the popular (industry standard) 465 oscilloscope.ReplyDelete
I can tell you about my first 'scope.
My name is Asadullah . I live in Pakistan.
I built my own first scope in 1964. It started with my having found a 2 inch round face tube in the scrap market which sold stuff discarded by the American base in Peshawar, the “Badaber” Comms base. (Peshawar, Cold War era)
I had a triode pentode tube which I used as a sweep oscillator and a bunch of 5k Allen-Bradley pots for vertical and horizontal shift. There was no front end amplifier. but at the lowest beam accelerating voltage I could look at and discern voltages in the mV range. It took me bit to find out how beam current is collected via the secondary emission from the phosphor. I had no books to guide me and am very proud of having discovered it on my own. Not much, I admit, but by a high school lad from a 3rd world country. I later modified it to look at modulation envelopes on my tiny QRP transmitter. ( Illegal as I had no license.)
So here is the story of my first 'scope.
I now own several Tek scopes and a lecroy. But the home brew was the best.
Need to take exception on Walter "inventing" the DSO. Please see http://www.spokesman.com/stories/2005/jul/24/digital-oscilloscope-inventor-moriyasu-dies/ReplyDelete
Let me know if there's some correction to be made here, firstname.lastname@example.org