I am starting up a youtube training channel

Fredrick Owner Georgia Posted   Latest   Edited  

I own and operate Mobile Diagnostic Solutions in Atlanta. I have also taught training classes in the area. I was asked to start the classes back up again, but decided I would try youtube instead. It is taking me some practice to make better quality videos. I am sure I will continue to improve on that from. If you like what i put out there, hit subscribe for me please. Thanks everyone. youtube​.​com/watch?v=WkvfN6…

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Benjamin Owner/Technician
Georgia
Benjamin Default
 

Thanks. That video has easy to understand explanations, I just subscribe. My YouTube name is OneLegged hondamechanic

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Stephen Educator
Ohio
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I have a website that I'm building (have already got it up and running). It is a clearing house of automotive repair training resources. I will add your site to the training materials with a hyperlink to your YouTube channel. I'm adding all kinds of content to it as we speak. Check out the site and if you would like, you can contact me and contribute to it. Wish you all the best. autoednet​.​com

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Kyle Technician
Florida
Kyle Default
 

I will check it out. Thanks!

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Rudy Technician
California
Rudy Default
 

Subscribed.

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Dmitriy Analyst
Ontario
Dmitriy Default
   

I am sure the author has the best intentions, but, and I am sorry to say that, this video contains dangerous misinterpretations of scope specifications. If anything, it just gives ammunition to fans of some scopes to claim that their scopes are being treated unfairly. Just two examples (out of many): 1. diag​.​net/file/fapvntg21… ​ What does it mean "Unknown" for the eScope? The scope…

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Fredrick Owner
Georgia
Fredrick Default
   

Hi Dmitriy, thanks for your critique. There is a buffer onboard the escope or at least I would think there has to be.,... some kind of buffer. I can't see data being sent from a processor directly to a transfer cable. If any packet were lost or rejected, it could not be resent and would simply be lost forever. So I would find it very hard to believe that any type of data collection device would…

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Dmitriy Analyst
Ontario
Dmitriy Default
 

"If they truely are sending data from a processor directly to a communication cable, then I would be very surprised, but without engineering level information I don't think there is any way anyone could possibly know for certain there is no cache whatsoever onboard." Here is what the Picoscope engineering team says about this: picotech​.​com/library/oscill…

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Rudy Technician
California
Rudy Default
 

Further down in the article linked,Pico indicates that it does indeed have a cache for data. While the sampling is quick. I do not believe it is direct. It seems that it the data were transferred directly over the USB cable, it would be too much and over load the cable or slow down the PC : In streaming mode, just like PicoScope 6, the PicoScope driver tells the scope to capture data…

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Dmitriy Analyst
Ontario
Dmitriy Default
 

The driver is a piece of software running on the PC and its buffer is in the PC’s memory. It’s more to organize transfer on the PC side. The key sentence is the first one: to transfer each sample or small group of samples to the PC with minimum delay. This is where magic happens.

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Fredrick Owner
Georgia
Fredrick Default
   

I think we are arguing over semantics here. Even in streaming mode there has to be some kind of buffer or cache. When data packets are sent, there is a check to make sure they were received. "Jitter" is a real thing that can happen with communication between two devices. The system has to have a way to handle errors if they get every so slightly out of sync, or if a packet just gets rejected or…

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Rudy Technician
California
Rudy Default
 

Dmitriy- those two examples were not exactly misinformation,IMO. rather they were lack of complete information. You said there were many examples. Can you give 2 more examples that were just plain wrong?

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Dmitriy Analyst
Ontario
Dmitriy Default
 

Thanks for lighting fire under my toes, Rudy, here are a couple more: 1:23 "Bandwidth is how fast of a frequency scope's sampling is". And illustration: diag​.​net/file/fa9g2otwi… Compare to the engineering definition I fetched from Picoscope website: diag​.​net/file/f2a4dlkfh… ​ The latter does not talk about sampling at all because it concerns distortion of the…

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Fredrick Owner
Georgia
Fredrick Default
 

Yea, I could have used the textbook definition of bandwidth and just said verbatim "The signal bandwidth in hertz refers to the frequency range in which the signal's spectral density (in W/Hz or V2/Hz) is nonzero or above a small threshold value. That definition is used in calculations of the lowest sampling rate that will satisfy the sampling theorem. The threshold value is often defined…

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Stephen Technician
Tennessee
Stephen Default
 

Hi Dmitriy, I thought I had an email address for you but can’t find it. Would you send one to me at …? Thanks Steve …

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Paul Mobile Technician
Ontario
Paul Default
 

Subscribed.

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