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General Public Area >> PicoScope >> Scope sampling
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Message started by jarvissamuel on Dec 9th, 2007 at 2:21pm

Title: Scope sampling
Post by jarvissamuel on Dec 9th, 2007 at 2:21pm
From 200s to 500.00s requested on igntion pattern check it out

http://youtube.com/watch?v=YJEbhELLJQY

Title: Re: Scope sampling
Post by Tom Roberts on Dec 9th, 2007 at 2:45pm
Nice job illustrating the importance of higher sample rates, Sam.[smiley=thumbsup.gif]

Title: Re: Scope sampling
Post by Mick on Dec 9th, 2007 at 4:58pm
I really like the way you do this video stuff,

I bet this one is for that Nathan guy me, carl and yourself have come across   [smiley=wallbash1.gif] http://video.google.com/videoplay?docid=6498941883251678606 what was the sample rate on this one can you put up the psdata file please.

Mick

Title: Re: Scope sampling
Post by Ronnie on Dec 9th, 2007 at 5:20pm
Hi Mick.

I have ran across him myself.We had a discussion on using a test light on primary.


I think he is someone else who use to be on IATN under another name.There cannot be two of them.

Ronnie.

Title: Re: Scope sampling
Post by jarvissamuel on Dec 9th, 2007 at 5:45pm
Mick

Nathan was an inspiration for this project but I do not see him adveresely.  He has some valid points on scopes with lesser resources.  The other movie you linked was for someone inquiring about a genisys scope module.  I just did a video clip of both I actually tried emulate the display of the genisys on the pico.  I believe the sample rate is whatever the default is using the automotive preset.  I actually made the genisys scope capture look better though it has a grid thats seems to cover up a lot it can be turned on or off

How about this psd instead its of the 500,000 sample request running 4 live windows 3 at different zoom levels :)
https://old.autonerdz.com/cgi/yabb2/YaBB.pl?action=downloadfile;file=ignition_500000s_composite.psdata (268 KB | )

Title: Re: Scope sampling
Post by jarvissamuel on Dec 9th, 2007 at 5:45pm
and for those without the picosoftware here is a screen shot.
ignition_500000s_composite.gif (77 KB | )

Title: Re: Scope sampling
Post by fisher on Dec 9th, 2007 at 6:42pm
Do you have then four windows open... I have never done that... there is just one scope but four windows and PICO software  is operable on all four windows - neato. You could open a second window and zoom in on a questionable cylinder having picked it out of the line-up while the vehicle was running. How about saving captures? Can you save on one window if you want while the rest are running?

Title: Re: Scope sampling
Post by fisher on Dec 9th, 2007 at 9:32pm
I dont know how to put four different windows at once on a screen to start out with. That would be easy to learn, something about cascading or tiling Windows is what you did,  is that right?   Is Pico's power diminished by the having of four screens used at once? Maybe that would be the limitation of the computer.
         

Title: Re: Scope sampling
Post by markB on Dec 10th, 2007 at 12:22am
The PicoScope 6 software will enable you to open more than one view. Simply right click on the scope window and choose Add View | Scope.

All of the views will display the same data but the new view will enable you to zoom in and different areas of interest.

Title: Re: Scope sampling
Post by Tom Roberts on Dec 10th, 2007 at 11:11am
Mark,

Thanks for dropping in   ;)

Fisher,

We have an extensive training movie library on PicoScope use covering 5.xx and 6.xx versions.  These are available to all who purchase a kit from Autonerdz or subscribe to our support and training package.

PicoScope 5 will allow you to run several scopes simultaneously with different settings, time bases, etc.  This does not reduce the scope performance as each scope window takes turns sampling the data.  Pico 6 can't do this presently but we hope to get that capability back in a future build.

Title: Re: Scope sampling
Post by Danny Berry, Sr. on Jan 2nd, 2008 at 2:43pm
Hi Tom,

This has nothing to do with sampling but I noticed that Pico 5.xx had a meter view capability and 6.xx version does not. Are they going to get that back as well?

Thanks,
Danny


Title: Re: Scope sampling
Post by Tom Roberts on Jan 2nd, 2008 at 3:04pm
I don't know, Danny.  The meter view wasn't all that useful unless you wanted to see big digital numbers.  The scope measurement functions are faster and there are more of them and they are more precise with more options.

They may put meter views in Pico 6 but I think it would be pretty low on the list of priorities unless there are a lot of requests for it.

Title: Re: Scope sampling
Post by Danny Berry, Sr. on Jan 2nd, 2008 at 4:36pm
OK Tom,

If I had the scope setup to use as a multimeter with the Ta00 leads attached to a channel and had a probe measurement set up to take a resistance in ohms for a simple example. The scope would give this a a straight line trace right.

P.S
I added your Zip file of custom probes that I found on the site.

Thanks,

DANNY

Title: Re: Scope sampling
Post by Tom Roberts on Jan 2nd, 2008 at 5:00pm
Danny,

There is no Ohms measurement.  With a scope, we look at dynamic voltage drops to see resistance issues.  Ohms measurements are not all that useful for many reasons.  


Quote:
I added your Zip file of custom probes that I found on the site.


Excellent   8-)

Title: Re: Scope sampling
Post by fisher on Jan 2nd, 2008 at 8:57pm
If a solenoid was rated at 100 to 200 ohms reisitance, and it was within range; does not make it good, because a short could equal the original resistance; but if it DOES not fall in range then regardless of it's operating characteristic it is no good.
An open circuit becomes obvious with an ohm meter.

Title: Re: Scope sampling
Post by Danny Berry, Sr. on Jan 4th, 2008 at 11:36am
Fisher,

Good point. Also if your checking for an open circuit only on a wire, or coil winding , with a digital multimeter. I use one  with a continuity test selection feature with an audible alarm. If it busses it is not open if it does not buss it is open (disconnected and isolated from the circuit of coarse).

Danny

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