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most recent messages 5/24/2013 4:49:53 PM Gary We have plenty of problems with internet access right here. The last mile, or in my particular case, the last 50 feet, is in a flakey state of disrepair, with Comcast and building management each... blog roll message boards chat Friday Fun: Where Do You Live & Work? Michael Dunn, Editor in Chief, Scope Junction, 5/24/2013 Comment now 6 comments "Where do you work" has two kinds of answers: A geographical locale, and a personal environment. What are your answers? Most recent post, Gary, 5/24/2013 4:49:53 PM We have plenty of problems with internet access right here. The last mile, or in... Time Domain? Frequency Domain? Frequency of the Phase Domain! Ransom Stephens, PhD, Applied Electrodynamics, RansomsNotes.com, 5/23/2013 Comment now 17 comments Fourier created the path between the time and frequency domains 200 years ago. Oscilloscopes master the time domain; add Fourier transform software and they can master the frequency domain, too. Most recent post, JohnMower, 5/24/2013 10:41:13 AM I've read your paper in the past! Thanks for posting this, I find it very interesting... Phase Noise Analyzers Take Over From Scopes Michael Dunn, Editor in Chief, Scope Junction, 5/22/2013 Comment now 4 comments Phase noise analyzers have traditionally been RF tools, but they're seeing more use in other areas when scopes and spectrum analyzers run out of steam. Most recent post, MD, 5/23/2013 5:19:43 PM If you mean that the internal oscillator was locked to the external signal of interest,... Notching the Frequency Response? Just Listen Michael Dunn, Editor in Chief, Scope Junction, 5/21/2013 Comment now 22 comments I recently came across an article by Rich Pell on EE Times discussing headphone equalization (EQ). Pell describes inserting a couple of notches to compensate for ear-canal resonances. I had to check this out. Most recent post, MD, 5/24/2013 8:39:33 AM Our own EngineerBill has written a chapter in it :-) How Many Bits Would You Like With That? Michael Dunn, Editor in Chief, Scope Junction, 5/20/2013 Comment now 52 comments Several manufacturers have been publicizing 12-bit scopes lately. How important is higher resolution, and do you need it? Most recent post, MD, 5/23/2013 4:58:17 PM > I see absolutely no compelling reason to stick with 8-bit, if 12-bit is... Bouncing Short Beats Clean Short for Real-World Testing Glen Chenier, Engineer, 5/17/2013 Comment now 21 comments Gadgetech's recent blogs on test thoroughness reminded me how some faults are found only because a specific method is followed, along with a bit of luck. This tale also demonstrates the beauty of a four-channel scope that sees almost everything that goes on simultaneously. Most recent post, Glen Chenier, 5/22/2013 3:39:18 PM >The card functioned normally when running on the extender board, Wonder how... Measuring (Small) Phase Errors With a Scope Ramkumar Ramaswamy, PhD, Chief Scientist, 5/16/2013 Comment now 8 comments Recently I was working on the design of a simple quadrature upconversion module for a Software Defined Radio (SDR) front-end. What it did was fairly straightforward -- take the baseband I and Q outputs from a direct-conversion receiver (an ADRF6850) and feed these to two modulators (the good old MC1496), configured as I and Q modulators, then combine ... Most recent post, Myscope, 5/24/2013 5:06:41 AM "And some scopes have a phase measurement function built-in, though without knowing... Choosing a Cheap Android – Help! Michael Dunn, Editor in Chief, Scope Junction, 5/15/2013 Comment now 49 comments In some previous blogs, we've discussed iOS apps, oscilloscope and other, as well as remotely controlling a scope from a device. Now, I want to get a cheap Android tablet to see what it can do in this arena. But you need to help me pick one. Most recent post, Myscope, 5/23/2013 12:27:55 AM MD, apart from that you have to look for camera options, SIM based voice/video calling... Can You Lend Me an ARM? Michael Dunn, Editor in Chief, Scope Junction, 5/14/2013 Comment now 55 comments I really like microprocessors and microcontrollers, little chips with the only goal in life to do your bidding. And I keep wanting to do one interesting project or another, though never seem get around to it. But I plan to change that. Most recent post, Wale Bakare, 5/21/2013 4:11:10 PM I was referring to language translator phone call app. This particular mobile app... The Direct View Storage Tube Shiv Balakrishnan, DSP & Test Expert, 5/13/2013 Comment now 14 comments Engineers of a certain vintage (I won't say how old except you had to be around in the late 1970s or early 80s) might remember the Tek 4051 desktop computer, or the venerable Tek 4014 graphics display terminal. The graphics came in only one color -- green -- but the quality of the picture was superb, and these terminals were popular in engineering ... Most recent post, Myscope, 5/22/2013 11:48:20 PM "Sure, marketing works. Yet, do not take away quality and great engineering." Afritgo,... Friday Fun: Test Those Tubes Michael Dunn, Editor in Chief, Scope Junction, 5/10/2013 Comment now 52 comments Believe it or not, every Radio Shack -- hell, almost every drugstore -- once had a tube tester sitting at the back, available for all to use. Pulling a bunch of tubes out of a malfunctioning radio or TV, and heading off to test them, was always an exciting little excursion! Most recent post, MD, 5/14/2013 6:53:08 PM > I consider it important for students in any branch of engineering to have... Next 5 blogs + All blogs All blogs most commented 52 How Many Bits Would You Like With That? Michael Dunn, Editor in Chief, Scope Junction, 5/20/2013 22 Notching the Frequency Response? Just Listen Michael Dunn, Editor in Chief, Scope Junction, 5/21/2013 17 Time Domain? Frequency Domain? Frequency of the Phase Domain! Ransom Stephens, PhD, Applied Electrodynamics, RansomsNotes.com, 5/23/2013 6 Friday Fun: Where Do You Live & Work? Michael Dunn, Editor in Chief, Scope Junction, 5/24/2013 4 Phase Noise Analyzers Take Over From Scopes Michael Dunn, Editor in Chief, Scope Junction, 5/22/2013 blog roll message boards chat 5/24/2013 4:49:53 PM Re: Hi Life in NC: We have plenty of problems with internet access right here. The last mile, or in my particular case, the last 50 feet, is in a flakey state of disrepair, with Comcast and building management each claiming the other is responsible for mainte... Gary on Friday Fun: Where Do You Live & Work? 5/24/2013 3:11:03 PM Re: Hi Life in NC: Now if only rural Internet access started seeing improvements. MD on Friday Fun: Where Do You Live & Work? 5/24/2013 1:44:06 PM Re: Hi Life in NC: Largely, I will write that I live on the web. There are many things that I do that no matter where I live, provided there is Internet, I am fine. It does not matter if I am near HBS, MIT, Stanford. I am not sure I am benefiting much from the... goafrit on Friday Fun: Where Do You Live & Work? 5/24/2013 1:39:39 PM Re: You can't beat Boston: >> The reason I moved here in the first place is that as far as I know, Boston is the only largish city in America that's within an easy I iwish I have the capability to control where I can live. It is where the opportunity comes... afritgo on Friday Fun: Where Do You Live & Work? 5/24/2013 1:34:53 PM You can't beat Boston: Where else can you go to workout in the gym, and on the Precor to your left is an MIT Engineer, and on the Precor to the right is a Harvard doctor? If you like science and engineering, this location just can't be beat. The reason I moved here... Gary on Friday Fun: Where Do You Live & Work? 5/24/2013 1:10:13 PM Hi Life in NC: >a university spawning a local ecosystem and culture I live on the fringes of RTP (Research Triangle Park). Can't get much more relevant than that when it comes to high tech in the southeastern USA. A great number of the major players are... gadgetech on Friday Fun: Where Do You Live & Work? 5/24/2013 10:41:13 AM Re: -140 dBc: I've read your paper in the past! Thanks for posting this, I find it very interesting and I certainly need to spend more time reading about phase noise. I have one question: φ[f] != ƒ[φ(t)] ? or am I looking at this incorrectly? Thanks,... JohnMower on Time Domain? Frequency Domain? Frequency of the Phase Domain! 5/24/2013 8:39:33 AM Re: Baby Crying: Our own EngineerBill has written a chapter in it :-) MD on Notching the Frequency Response? Just Listen 5/24/2013 5:24:19 AM Scope like objects: Spectrum analyzer has a majority !!!. Both spectrum and logical analyzer are useful like scopes. Myscope on Scope-Like Objects 5/24/2013 5:06:41 AM Re: Digital: "And some scopes have a phase measurement function built-in, though without knowing the method used, accuracy might be suspect." MD, I believe that such measurements can be making accurate, once after calibrating the device. Myscope on Measuring (Small) Phase Errors With a Scope 5/24/2013 12:38:43 AM Baby Crying: "Yes, one at 2500Hz, but much sharper than the original graph. Another peak around 3200Hz. No peak noticed around 7500, though that's where I start to roll off significantly!" -MD It sounds like a nice resonance for the sound of a baby crying... cgervasi on Notching the Frequency Response? Just Listen 5/23/2013 6:34:34 PM Re: -140 dBc: I meant big as in long, not bug. Ransom on Time Domain? Frequency Domain? Frequency of the Phase Domain! Next 5 messages + All messages All messages blog roll message boards chat 4/27/2013 10:33:39 AM Friday April 26th Live Chat here, 1230ET: Hey, interesting ideas, I would imagine T&M will move ever more closer to the world of Labview and automated test. Starngely, that LCR bridge that i posted has ATE features built-in and it is from 70's/early 80's! H. Sanders Sheriff 4/26/2013 2:31:03 PM Friday April 26th Live Chat here, 1230ET: I think that I have a test-board that I can futz around with. I will stay after work a bit and see what I can TDR. jason8957 Blogger 4/26/2013 2:28:42 PM Friday April 26th Live Chat here, 1230ET: I have this server on my desk with all my software on it and I can just cable it to any system that I want to mess with using x16 PCIe. jason8957 Blogger 4/26/2013 2:27:10 PM Friday April 26th Live Chat here, 1230ET: http://sine.ni.com/images/products/us/03221101_m.jpg jason8957 Blogger 4/26/2013 2:26:39 PM Friday April 26th Live Chat here, 1230ET: I have a server with the x16 MXIe card in it cabling to a PXIe chassis so that it can control the system remotely. jason8957 Blogger 4/26/2013 2:17:46 PM Friday April 26th Live Chat here, 1230ET: It's an external box with a PCIe cable? MD Blogger 4/26/2013 2:16:19 PM Friday April 26th Live Chat here, 1230ET: I use it all the time to connect to a server that I can remote desktop in to. jason8957 Blogger 4/26/2013 2:15:51 PM Friday April 26th Live Chat here, 1230ET: NI PXIe-8388 w 3m cable. x16 Gen2 MXI-Express for PXI Express Interface jason8957 Blogger 4/26/2013 2:15:41 PM Friday April 26th Live Chat here, 1230ET: I've been lurking. 73s till next time. cgervasi Apprentice 4/26/2013 2:14:39 PM Friday April 26th Live Chat here, 1230ET: Slow start turned into a great chat. I need to take off, but the chat remains open! See you around. MD Blogger Next 5 chats +		information resources sponsored content by Tektronix Creating Multi-SMU Systems with High Power System SourceMeter Instruments Application Note Parametric Curve Tracer Configurations Fundamentals of a Mixed Domain Oscilloscope Power Supply Measurement and Analysis Application Note Measurement Systems Signal Integrity: Important Factors to Consider Application Note The Basics of Serial Data Compliance and Validation Measurements All resources flash poll All polls twitter Follow us like us on facebook

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