Author Topic: Oscilloscope training class (long)  (Read 133176 times)

0 Members and 3 Guests are viewing this topic.

Offline w2aew

  • Super Contributor
  • ***
  • Posts: 1659
  • Country: us
  • I usTa cuDnt speL enjinere, noW I aR wuN
    • My YouTube Channel
Re: Oscilloscope training class (long)
« Reply #100 on: December 29, 2012, 03:04:22 AM »
@w2aew;
"To test this hypothesis on your scope, setup the 100k or 1MHz square wave and make the rise time measurement. Without changing the horizontal controls, simply change the square wave frequency on the FG down to 100Hz.  You should still have a rising edge on the screen, and it should still be reading the same fast rise time.  This is the true rise time. "

Exactly! Same rising edge & same rise time.

As usual, thank you very much for your detailed explanation.

Regards.

It is very unfortunate that your scope LIES to you at the lower sweep speeds.  Better digital scopes will at LEAST tell you that they have "low resolution" or "insufficient sample rate" for a given measurement in these types of cases.  It's good that you now know about this characteristic of your scope.

By the way, I touch upon this topic of insufficient sampling a little bit near the beginning of this video that I did regarding risetime measurements:
« Last Edit: December 29, 2012, 03:25:18 AM by w2aew »
======================================
YouTube channel: http://www.youtube.com/w2aew
FAE for Tektronix
 

Offline tinhead

  • Super Contributor
  • ***
  • Posts: 1798
  • Country: 00
    • If you like my hacks, send me a donation
Re: Oscilloscope training class (long)
« Reply #101 on: January 21, 2013, 10:13:28 AM »
@w2aew;
"To test this hypothesis on your scope, setup the 100k or 1MHz square wave and make the rise time measurement. Without changing the horizontal controls, simply change the square wave frequency on the FG down to 100Hz.  You should still have a rising edge on the screen, and it should still be reading the same fast rise time.  This is the true rise time. "

Exactly! Same rising edge & same rise time.

As usual, thank you very much for your detailed explanation.

Regards.

It is very unfortunate that your scope LIES to you at the lower sweep speeds.  Better digital scopes will at LEAST tell you that they have "low resolution" or "insufficient sample rate" for a given measurement in these types of cases.  It's good that you now know about this characteristic of your scope.

as the manufacturer of his DSO designed their first model (2008), it was a 1:1 TDS2000 (A/B) series clone. I have here one,
and even with chinese firmware on it, knowing TEK, i can completly blind navigate through almost all menus. And gues what this DSO can, yes, it shows (a chinsese character) when measured values can not be properly calculated.

I have no idea why the "current" model, which was however designed already 3.5yrs ago, is not having such simple functionality.
Maybe simply lazy developer. I did reversed (partialy) their firmware and i know that they at least analyzing waveform risetime before they applying filters - so the data "valid, not valid, value" is there somewhere.

But this is exactly the "small" difference between some old known manufacturers and the rest of the world.
Or maybe simple question of price (diff between Hantek and Tek is already >500USD) ?

Maybe both, but this is what all the beginners out there should realize before they buy anything.
I don't want to be human! I want to see gamma rays, I want to hear X-rays, and I want to smell dark matter ...
I want to reach out with something other than these prehensile paws and feel the solar wind of a supernova flowing over me.
 

Offline FrozenHaxor

  • Contributor
  • Posts: 27
  • Country: pl
    • My random stuff
Re: Oscilloscope training class (long)
« Reply #102 on: March 12, 2013, 12:41:34 AM »
@w2aew
You have done such a great job on all of your Oscilloscope tutorials, it's amazing how certain things can be explained on completely another level by the right person.
 

Offline RjSa

  • Contributor
  • Posts: 21
  • Country: ve
Re: Oscilloscope training class (long)
« Reply #103 on: March 12, 2013, 02:16:55 AM »
This is excellent! I have been looking for videos like these for a long time.

Thanks
 

Offline EExtrom

  • Contributor
  • Posts: 11
  • Country: fi
Re: Oscilloscope training class (long)
« Reply #104 on: March 12, 2013, 03:19:40 AM »
Thank you soo much, regardless of the sound!  :-+
 

Offline RobB

  • Contributor
  • Posts: 37
Re: Oscilloscope training class (long)
« Reply #105 on: March 13, 2013, 05:01:29 AM »
Yep I have to agree. Some of the clearest and concise tut's on O'scopes and circuit theory around.  :-+ :-+ :-+ :-+ :-+
I have subscribed the the Youtube channel for some time.
« Last Edit: March 13, 2013, 05:04:47 AM by RobB »
 

Offline usreworkstationsMODS

  • Newbie
  • Banned!
  • Posts: 3
  • Country: 00
    • The BGA Warehouse
Re: Oscilloscope training class (long)
« Reply #106 on: May 22, 2013, 03:54:19 PM »
I helped teach a class on the basics of oscilloscopes to the New Jersey Antique Radio Club. This club is dedicated to the restoration and preservation of antique radios - mainly from the golden age of broadcasting. The class was geared entirely around analog scopes, since that's the type of scope that these guys would most likely come across or have access to for their radio restoration projects. We affectionately called the class "Scopes for Dopes", and it was a great success.


Fortunately, the session was videotaped. We had two projectors going - one with presentation slides, and one with a video camera feed that was focused on a few scopes on a table for demonstration.




To make it easier to navigate this long video - over 2 hours long, here is a list of time-stamps and the topics that begin at those timestamps. Using this "table of contents", you can easily move the youtube player location to the topic of interest.


0:00:00 Opening and Agenda
0:02:50 Brief History of Oscilloscopes – with Al Klase
0:15:00 Start of Basics of Oscilloscopes – with Alan Wolke
0:19:00 Basic Block Diagram of an Oscilloscope
0:19:50 Oscilloscope / Display Overview
0:23:00 Display Section Functions and Controls
0:28:10 Vertical Section Description
0:33:17 Vertical Scale / Coupling Controls, Input Impedance
0:38:04 Vertical Mode Controls
0:48:05 In-circuit Example of using two traces on the oscilloscope
0:52:41 Horizontal Section Description
0:53:48 Horizontal Sweep Types & Controls
1:10:15 Triggering (Synchronization) Section Description
1:13:19 Trigger Source, Mode and Coupling Controls
1:19:56 Trigger Level and Slope Controls
1:23:29 Introduction to Oscilloscope Probes
1:31:45 1X and 10X Passive Probes
1:34:00 10X Probe Compensation and Use Considerations
1:48:48 XY Mode of Operation
2:00:12 Front Panel Control Layout
2:02:20 Pop Quiz!
2:03:00 Wrap Up: Oscilloscope adds Intuitive Feel to circuit operation
2:04:45 Questions and Answers
2:13:35 Brief History of Oscilloscope Tubes

Also, if you are interested, I have a couple of other oscilloscope videos on my YouTube channel:
http://www.youtube.com/w2aew
...including a tutorial on 1X and 10X probes...

Awesome! Really really cool!I like your style of teaching. I am learning more about Oscilloscope as we are more interested in this market.

Offline w2aew

  • Super Contributor
  • ***
  • Posts: 1659
  • Country: us
  • I usTa cuDnt speL enjinere, noW I aR wuN
    • My YouTube Channel
Re: Oscilloscope training class (long)
« Reply #107 on: June 22, 2013, 10:36:01 AM »
I recently added a video that discusses the waveform sampling process in typical digital oscilloscopes.


======================================
YouTube channel: http://www.youtube.com/w2aew
FAE for Tektronix
 

Offline Branqazwsx

  • Supporter
  • ****
  • Posts: 11
  • Country: us
Re: Oscilloscope training class (long)
« Reply #108 on: October 07, 2013, 10:30:51 AM »
great info, I learned a lot
 

Offline coreybus

  • Contributor
  • Posts: 8
Re: Oscilloscope training class (long)
« Reply #109 on: October 07, 2013, 10:45:37 AM »
Perfect. I have been searching everywhere for something like this to help me out with my electrical engineering degree. One word of advice. Do something with your youtube tags, because i searched 'Oscilloscope Tutorials' and the like on youtube and never did your video come up. But great none the less
 

Offline ttyz

  • Contributor
  • Posts: 6
  • Country: ru
    • ttyz electronics blog
Re: Oscilloscope training class (long)
« Reply #110 on: October 07, 2013, 06:54:16 PM »
Great! that was very useful! Thanks!
 

Offline georgedone

  • Contributor
  • Posts: 8
Re: Oscilloscope training class (long)
« Reply #111 on: October 07, 2013, 11:23:57 PM »
Really nice ! Thanks for sharing !
 

Offline deanriverson

  • Contributor
  • Posts: 7
Re: Oscilloscope training class (long)
« Reply #112 on: October 08, 2013, 03:32:52 AM »
Really great material, thanks for the pointers!
 

Offline shk1d29

  • Contributor
  • Posts: 10
  • Country: us
Re: Oscilloscope training class (long)
« Reply #113 on: October 08, 2013, 07:17:42 AM »
Great tutorials. I used them back in highschool, but its been over 20 years or so ago. I'm just relearning again as a hobby. This is fun stuff.
 

Offline kalobg

  • Contributor
  • Posts: 9
Re: Oscilloscope training class (long)
« Reply #114 on: October 08, 2013, 04:25:19 PM »
Great video!
 

Offline w2aew

  • Super Contributor
  • ***
  • Posts: 1659
  • Country: us
  • I usTa cuDnt speL enjinere, noW I aR wuN
    • My YouTube Channel
Re: Oscilloscope training class (long)
« Reply #115 on: October 08, 2013, 10:57:39 PM »
Great video!

Thanks! Which one?  There are over 100 on my channel now, most of them are tutorials of some sort.
======================================
YouTube channel: http://www.youtube.com/w2aew
FAE for Tektronix
 

Offline Chris Wilson

  • Frequent Contributor
  • **
  • Posts: 851
  • Country: gb
  • Race car engineer, dog lover, hoarder.
Re: Oscilloscope training class (long)
« Reply #116 on: October 08, 2013, 11:01:29 PM »
IMO all of them! :) Yet to see a boring or bad one ;) Appreciated, great YouTube channel!
Best regards,

                 Chris Wilson.
 

Offline roach969

  • Contributor
  • Posts: 7
Re: Oscilloscope training class (long)
« Reply #117 on: October 11, 2013, 03:22:42 PM »
Thank you for this.  I've been out of the electronics field for quite some time and am getting back into it.  As life goes, if you don't use it, you lose it!  So I'm a bit rusty and this is a great start.  Thanks again!
 

Offline npnlamp

  • Contributor
  • Posts: 19
Re: Oscilloscope training class (long)
« Reply #118 on: October 13, 2013, 03:57:25 AM »
Thanks really good tutorials! Also i found this online oscilloscope emulator: http://www.virtual-oscilloscope.com/simulation.html
Hope that helps someone :D
 

Offline roach969

  • Contributor
  • Posts: 7
Re: Oscilloscope training class (long)
« Reply #119 on: October 22, 2013, 09:51:57 AM »
Thanks really good tutorials! Also i found this online oscilloscope emulator: http://www.virtual-oscilloscope.com/simulation.html
Hope that helps someone :D

Great tool, thanks for posting!
 

Offline npnlamp

  • Contributor
  • Posts: 19
Re: Oscilloscope training class (long)
« Reply #120 on: October 23, 2013, 04:29:30 AM »
Thanks really good tutorials! Also i found this online oscilloscope emulator: http://www.virtual-oscilloscope.com/simulation.html
Hope that helps someone :D

Great tool, thanks for posting!

Glad it helped!
 

Offline leno

  • Newbie
  • Posts: 4
Re: Oscilloscope training class (long)
« Reply #121 on: November 02, 2013, 09:17:15 PM »
thank to you all I have learnt a lot
 

Offline BeerCannon

  • Contributor
  • Posts: 45
  • Country: us
Re: Oscilloscope training class (long)
« Reply #122 on: December 06, 2013, 01:40:30 PM »
Watching this has been on my 'to-do' list.  Finally put in the time today to watch the whole thing.  Very informative and enjoyable.  Thanks so much for posting the video!
 

Offline w2aew

  • Super Contributor
  • ***
  • Posts: 1659
  • Country: us
  • I usTa cuDnt speL enjinere, noW I aR wuN
    • My YouTube Channel
Re: Oscilloscope training class (long)
« Reply #123 on: December 06, 2013, 03:06:06 PM »
Watching this has been on my 'to-do' list.  Finally put in the time today to watch the whole thing.  Very informative and enjoyable.  Thanks so much for posting the video!

I'm glad you enjoyed it. I have many more (shorter) videos on my channel, dealing with everything from various scope and Test & Measurement topics, circuit tutorials, troubleshooting vids, and ham radio topics.
Http://www.youtube.com/w2aew
======================================
YouTube channel: http://www.youtube.com/w2aew
FAE for Tektronix
 

Offline Tallie

  • Regular Contributor
  • *
  • Posts: 106
  • Country: us
Re: Oscilloscope training class (long)
« Reply #124 on: January 03, 2014, 06:54:54 AM »
Thanks for posting this!
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf