Author Topic: Osciiloscope video  (Read 8023 times)

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Offline lnx64

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Osciiloscope video
« on: November 08, 2013, 06:00:52 am »
Have been playing around a little with my Tektronix 2236 today.

Thought this was kinda cool.

The screenshot below, used my laptop as a way to generate the precise vertical sawtooth required from my Sega Genesis, which is actually 59.92 Hz.  The horizontal was achieved actually by simply setting my timebase knob to sweep at the right speed that I needed, and then use the little cal knob to dial it in correctly.  This isn't perfect though, it still loose horizontal hold.  The vertical over time DOES scroll.  The composite video output of the console is connected to the Z input of the scope.

The second link, is just completely from my soundcard.  It was a 32-bit 96KHz audio file.

Enjoy!



And

 

Offline Tac Eht Xilef

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Re: Osciiloscope video
« Reply #1 on: November 08, 2013, 06:17:08 am »
The second link, is just completely from my soundcard.  It was a 32-bit 96KHz audio file.
...

I approve of this video  :-+
 

Offline mtdoc

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Re: Osciiloscope video
« Reply #2 on: November 08, 2013, 06:32:19 am »
Awesome!

.

The second link, is just completely from my soundcard.  It was a 32-bit 96KHz audio file.



Link to the file?  I would love to show this to my kids on my 2236
 

Offline lnx64

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Re: Osciiloscope video
« Reply #3 on: November 08, 2013, 06:59:01 am »
I'm on my phone right now and the link is from my friend. He generated the file, I'll ask him if I can link directly from his server or if I should relink it.
 

Offline ElectroIrradiator

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Re: Osciiloscope video
« Reply #4 on: November 08, 2013, 07:41:01 am »
Nice video. :)

If you can find a DC coupled audio output, then you should be able to prevent the display from bouncing all over the place.
 

Offline Stonent

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Re: Osciiloscope video
« Reply #5 on: November 08, 2013, 11:18:45 am »
The second link, is just completely from my soundcard.  It was a 32-bit 96KHz audio file.
...

I approve of this video  :-+

VF-31 also approves.

The larger the government, the smaller the citizen.
 

Offline lnx64

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Re: Osciiloscope video
« Reply #6 on: November 08, 2013, 09:20:55 pm »
Awesome!

.

The second link, is just completely from my soundcard.  It was a 32-bit 96KHz audio file.



Link to the file?  I would love to show this to my kids on my 2236
Here you go, sorry I took longer than expected, I slept in.

http://www.mediafire.com/download/rerbr9kclc3dt9w/felix.flac

It's a FLAC file, VLC works good, but I noticed on some sound cards, you may need to invert channel B.
 

Offline Stonent

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Re: Osciiloscope video
« Reply #7 on: November 08, 2013, 09:35:28 pm »
Oh good it is in flac format. I tried an mp3 of oscillofun once and it just filled the screen with garbage, once I found a flac it was fine.
« Last Edit: November 08, 2013, 11:59:39 pm by Stonent »
The larger the government, the smaller the citizen.
 

Offline mtdoc

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Re: Osciiloscope video
« Reply #8 on: November 08, 2013, 09:47:33 pm »


Here you go, sorry I took longer than expected, I slept in.


Excellent!  Thank you.
 

Offline Hydrawerk

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Re: Osciiloscope video
« Reply #9 on: November 08, 2013, 09:57:22 pm »
Doesn't work at my DSOX2002A, but I think that I do not have enough good PC sound card.
Amazing machines. https://www.youtube.com/user/denha (It is not me...)
 

Offline lnx64

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Re: Osciiloscope video
« Reply #10 on: November 08, 2013, 10:26:07 pm »
Doesn't work at my DSOX2002A, but I think that I do not have enough good PC sound card.
You'll need to find the specs on your sound card.  The file is 32-bit 96KHz.

Audacity can slow it down so it doesn't get aliased by the sound card, distorting the graphics, you'll just have to match the sampling rate of your sound card though.  Might be 48KHz max or something.  Even if 16-bit that should be fine, it's 32-bit float.
 

Offline lnx64

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Re: Osciiloscope video
« Reply #11 on: November 09, 2013, 07:57:04 am »
Here's video of the raster image btw.

There's obviously far better ways to do this.  I did it the odd, hard, and unique way..
 

Offline Hydrawerk

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Re: Osciiloscope video
« Reply #12 on: November 09, 2013, 03:20:16 pm »
At my PC I have an integrated sound card in my motherboard named Intel Topsfield dp43tf.
There is probably a RealTek ALC888VC audio codec.
http://www.realtek.com.tw/products/productsView.aspx?Langid=1&PFid=28&Level=5&Conn=4&ProdID=135
It could be set to 96kHz sampling rate, maybe... I am not familiar with this.  :-/O
« Last Edit: November 09, 2013, 03:27:33 pm by Hydrawerk »
Amazing machines. https://www.youtube.com/user/denha (It is not me...)
 

Offline lnx64

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Re: Osciiloscope video
« Reply #13 on: November 09, 2013, 03:34:15 pm »
At my PC I have an integrated sound card in my motherboard named Intel Topsfield dp43tf.
There is probably a RealTek ALC888VC audio codec.
http://www.realtek.com.tw/products/productsView.aspx?Langid=1&PFid=28&Level=5&Conn=4&ProdID=135
It could be set to 96kHz sampling rate, maybe... I am not familiar with this.  :-/O
I'll be honest, same brand of DAC my MacBook Pro uses, and it looks like it supports the same formats.  It should work.

Try it in VLC with volume at 100%, and computer volume at 100%..  Maybe something is just making it play wrong or something.  I would think even a DSO can do this, though it'll show the retrace lines, unlike the analog scope.
 

Offline Stonent

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Re: Osciiloscope video
« Reply #14 on: November 10, 2013, 06:39:08 am »
Felix the FLAC the wonderful wonderful FLAC.
The larger the government, the smaller the citizen.
 

Offline Stonent

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Re: Osciiloscope video
« Reply #15 on: November 10, 2013, 11:07:21 am »
I tried the flac with a couple of players on my android phone and it just jumped to the end without any sound. I had previously fed oscillofun from a flac into my scope with no problems. I guess it doesnt like the 96k stuff.
The larger the government, the smaller the citizen.
 

Offline Kryoclasm

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Re: Osciiloscope video
« Reply #16 on: November 10, 2013, 03:00:07 pm »
The riddle - on a Tektronix 453 oscilloscope   :-+

“I predict that very shortly the old-fashioned incandescent lamp, having a filament heated to brightness by the passage of electric current through it, will entirely disappear.” -Nikola Tesla
 

Offline lnx64

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Re: Osciiloscope video
« Reply #17 on: November 10, 2013, 04:57:54 pm »
The riddle - on a Tektronix 453 oscilloscope   :-+


He cheated. NTSC signal. That's no vector. :p  But that is my next project. Proper lm sync separator chip and NTSC video.
 

Offline BravoV

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Re: Osciiloscope video
« Reply #18 on: November 10, 2013, 05:04:22 pm »
The riddle - on a Tektronix 453 oscilloscope   :-+


He cheated. NTSC signal. That's no vector. :p  But that is my next project. Proper lm sync separator chip and NTSC video.

Thats not cheating, its called pure "analog" magic.  :P

Btw, is there any program that can convert any video to that FLAC signal ? or that one is "hand-crafted" ?  ???

Offline mtdoc

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Re: Osciiloscope video
« Reply #19 on: November 10, 2013, 09:33:59 pm »
I tried unsuccessfully to get Felix going on my Tek 2236, 2467 and my Rigol 2072A using 2 different computers. I could kind of barely make out some of the animation during portions of it...but no joy :-[
 

Offline lnx64

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Re: Osciiloscope video
« Reply #20 on: November 10, 2013, 09:58:45 pm »
I tried unsuccessfully to get Felix going on my Tek 2236, 2467 and my Rigol 2072A using 2 different computers. I could kind of barely make out some of the animation during portions of it...but no joy :-[
Since people seem to be having problems with the FLAC, I might try re-downloading it and doing it on my tek tonight.  I wonder if media fire butchered the file.
 

Offline lnx64

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Re: Osciiloscope video
« Reply #21 on: November 10, 2013, 10:00:24 pm »
The riddle - on a Tektronix 453 oscilloscope   :-+


He cheated. NTSC signal. That's no vector. :p  But that is my next project. Proper lm sync separator chip and NTSC video.

Thats not cheating, its called pure "analog" magic.  :P

Btw, is there any program that can convert any video to that FLAC signal ? or that one is "hand-crafted" ?  ???
I'll be doing it too soon, once I get the LM sync separator chip.

There is, it'll take me some time to find the link though..  There's a bit of conversion that has to be done.
 


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