Re: gEDA-user: Any DIY USB Scope project on schedule? Or some recommmendation?

[Wojciech Kazubski <wk@ire.pw.edu.pl>]

Hi
For me the analog bandwidth is a bit too low, this means that 250kHz sine can 
be digitalized with 80 samples per period. I think that 20MS/s is a some kind 
of a whistle, it cost a little, maybe a bit finer sampling accuracy plus some 
software to handle this. 
Another curious thing in product brochure is:

"Hardware upgradeable over USB"

Wojciech Kazubski

> Em Ter 23 Nov 2004 11:10, Christian Frisson escreveu:
> > Hi,
> >
> > I'm a audio-engineering student in need of a cheap portable 2-way scope
> > that could travel with me easily. Instead of second-hand standard
> > oscilloscopes and handheld advanced multimeters, the idea of a
> > high-transfer-rate (neither serial nor parallel) peripheral that could be
> > attached to a computer in order to use its screen and perfs seduced me.
> > The latest DS1M12 "Stingray" from USB-Instruments
> > (http://www.usb-instruments.com/), rated at 300€ circa, looks like a
> > killer for what I need, and it ads tonegen and partial Linux-compliance.
> > I'm not into HAM radio (at least FM synthesis), so the sampling specs
> > seem to be suitable. When it comes to tube homebrewing, I think an X10
> > probe should enlarge the 0-50V span to 0-500V without damage.
> >
> > Before diving in, have I missed something particuliar that should make me
> > turn away?
> >
> > Do you know if such a device has been turned into a DIY project? With
> > COMEDI (http://www.comedi.org) and/or xoscope (http://xoscope.sf.net)
> > compliance?
> >
> > Cheers,
> > Christian Frisson
>
> Very nice product. I am looking for a digital oscilloscope too, but those
> instruments in Brazil costs to much. I am a little confused, this produtc
> says it makes 20M samples per second, but have a analog bandwidth of 250k
> Hz. What is the greatest (in frequency) signal I can measure with it?
> Someone knows?