Take a look at http://www.usb-instruments.com/ . I ggot their new scope 
yesterday - looks like it's everything you need.

Limitation: A 1MHz sampling rate may put you off. Realistically, 
sampling rate should be about 5 times the highest frequency you will be 
observing, which limits you to 200KHz. Still a big improvement from the 
scopes using a sound card. $220.00.

Tom Stamm

Hasan A. Khan wrote:
> Hi,
> I am thinking of buying an oscilloscope and a function
> generator.  My needs are limited to hobby use, for now
> atleast.  I wanted something that could be controlled
> by my PC and would serve me for a few years in future
> as my abilities grow.  I liked the Velleman's
> instuments PCS500 scope and their PCG10 function
> generator which can communicate with the scope.  What
> is your opion of these Velleman instuments?  Any other
> similar options?
> 
> Here are the links to these instuments
> http://www.velleman.be/common/productlist.aspx?lan=1&id=346041
> http://www.velleman.be/common/productlist.aspx?lan=1&id=346034
> 
> 
> 
> -Hasan
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