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Bode Plot with PicoScope ?

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Bode Plot with PicoScope ?

Postby Guest » Tue Aug 26, 2008 12:00 pm

Hello,

we need to test the frequency response of a PI (PID)
loop and the system. To use PicoScopes would be nice,
so do you have an idea how to solve this problem ?

Best Regards,
Marco
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Postby picojohn » Fri Aug 29, 2008 10:07 am

Hello Marco,

I am curious that you wish to measure frequency response rather than step response.

You could conceivably measure the latter with one of our oscilloscopes, however, you would need to define the parameters.

Regards
John
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Postby Guest » Fri Aug 29, 2008 3:13 pm

Hi John,

for this application i need to measure the frequency
response, it is a very slow system in the range of 0.01 - 10Hz.
Step response is also important to see how the loop react to changes
in the system but this is easy to measure with an oscilloscope.
To design the loop it helps to see the transit frequency and phase,
therefor a bode plot is a nice tool. With a 2 channel scope and the build in
generator (awg) it should be possible to build up such a testsetup - what do you think ?

greetings,
marco



picojohn wrote:Hello Marco,

I am curious that you wish to measure frequency response rather than step response.

You could conceivably measure the latter with one of our oscilloscopes, however, you would need to define the parameters.

Regards
John
Guest
 

Postby picojohn » Fri Sep 05, 2008 10:11 am

Hi Marco,

What you wish to achieve is technically feasible if you were to write your own application software, and your solution would be an interesting and useful addition to this forum.

You could of course simply use cursors in PicoScope to determine time difference between channels (and therefore determine phase) at various spot frequencies, which you could then plot graphically.

Regards
John
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Bode Plots

Postby Guest » Mon Sep 08, 2008 4:19 pm

I agree, the PicoScope would be an excellent platform for Bode plots. I have put it in as a suggestion for a long time now. The manual way is just to time consuming. I have one of our software engineers looking into writing code for this. If PicoScope would do this I would be willing to work with them and spend extra for the software application just to do Bode plots. They already have some of the basic software in the spectral feature. I am also prepared to buy an upgraded scope, from the 3000 series I currently have, to a 5000 series scope.
I currently use a 2630 Tektronix Fourier Analyzer which is obsolete and we can not even get it repaired anymore. I must get something more reliable.
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Re: Bode Plots

Postby Guest » Wed Sep 10, 2008 6:01 pm

Hello,

so we are two persons who need such instrument
and i think there will be a lot more out there that
need Bode Plots for testing and development.

So it would ne nice to know if PICO TECH. will
include this option or not ?

As an option the Vellemann Scope + Function Generator
can perform a Bode Plot, but i don't like thier products,
so a solution from Pico would be better.

greetings,
marco



Anonymous wrote:I agree, the PicoScope would be an excellent platform for Bode plots. I have put it in as a suggestion for a long time now. The manual way is just to time consuming. I have one of our software engineers looking into writing code for this. If PicoScope would do this I would be willing to work with them and spend extra for the software application just to do Bode plots. They already have some of the basic software in the spectral feature. I am also prepared to buy an upgraded scope, from the 3000 series I currently have, to a 5000 series scope.
I currently use a 2630 Tektronix Fourier Analyzer which is obsolete and we can not even get it repaired anymore. I must get something more reliable.
Guest
 

Postby picojohn » Thu Sep 11, 2008 11:00 am

Hi Marco & Guest,

Thank you for your inputs and, I shall pass them to our product planning team for consideration.

Regards
John
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Re: Bode Plot with PicoScope ?

Postby Another Guest » Sat Jan 16, 2010 2:47 am

Hello,

Just wanted to give a third agreement on that. I know some other scopes have that ability, and I would like my picoscope to be able to do that too.
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Re: Bode Plot with PicoScope ?

Postby Guest » Wed Jan 20, 2010 9:17 am

Hello,

I'd also just like to join the club. I had a Velleman before and used its ability to record bode plots heavily. When I bought the Picoscope I just presumed it would be able to do this as well and was quite dissapointed to find it couldn't.

I get the answer "suggest it to the developers" for three years now. Could you give us a hint what they answered?

I like the scope in its other aspects, but I'm missing the bode tool badly.
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Re: Bode Plot with PicoScope ?

Postby PeterF » Wed Jan 20, 2010 10:26 am

There are many functions that we do want to put into PicoScope6, Bode Plots are one. The only difficulties are time and engineering resources. Unfortunately, I cannot give any indication of when, or in what order, we can roll-out new features. We are working as fast as we can!
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Re: Bode Plot with PicoScope ?

Postby giordy72 » Fri Apr 09, 2010 4:18 pm

Hi forum :)
I'm another one who wants the bode plot function!
I have a brand new 2204 and i was wondering to use labview to check the frequency response of some audio amplifiers...unfortunatly it crash 2 sec after labview call the picoscope llb, but I don't want to go offtopic so i will post this issue in the right section of the forum.
Coders...I need the bode plot function in Picoscope6 :-)
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Re: Bode Plot with PicoScope ?

Postby Guest » Mon Jul 19, 2010 11:17 am

I've gone for the Velleman for the same reason - Bode plots... but I really wanted the Picoscope.
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Re: Bode Plot with PicoScope ?

Postby francislinus » Tue Jul 20, 2010 6:25 am

i`m using a Pico 2000 series and wish we had this bode plot capability.
I also have a low cost CLIO 7 system which does excellent bode plotting (frequency response) both in electrical and acoustics domain.
it`s also has exteremely easy to use and has whole lot of features ,quite amazing for it`s price.the only snag is it`s all within the audio spectrum.
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Re: Bode Plot with PicoScope ?

Postby Maren » Thu Jun 09, 2011 2:35 pm

*bonk*

One year later, still no bode plot! Just reminding.
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Re: Bode Plot with PicoScope ?

Postby ziko » Tue Jul 12, 2011 9:32 am

Hi sorry about this but it is still on our to do list unfortunately I cannot give any timescales.
Ziko

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