AVR-Chat

I have an Ant8 myself, and am very happy with it.
500 MHz means your max sample rate is 2 nS.  This 
means your logic analyzer can tell you when things
really happen, +- 2 nS.  

At 40 MHz, you get +- 25nS -- still pretty good.

Sometimes, you want to insure you catch some 
very transient (ie short) pulses.  At 40 MHz,
you'll ignore anything shorter than 25 nS. 

--- In AVR-Chat@yahoogroups.com, techy fellow <techyf@y...> wrote:
> Hi Alex,
>  
> Thanks alot for the info. As I am into MCUs, I need an equipment to 
help me to test my projects. I will be getting an AVR ICD or ICD2 for 
PIC. But when comes to testing of circuits, I think I need something 
more than just ICD.
>  
> I thought of using a logic analyzer since it is meant for digital 
circuits. Actually, I am about to build one appeared in Elektor 
magazine Feb 2003 issue. Top speed is 40 Mhz. Pale in comparison to 
the one sold by Rocky Logic (500 Mhz). I thought since almost all 
MCUs is less than 32Mhz (even for ATMega 128), a 40Mhz model should 
do the job. Why do we need 500 Mhz ?
>  
> cheers,
> Davis
> 
> 
> Alex Gibson <alxx@a...> wrote:
> techy fellow wrote:
> 
> >Hi Guys,
> > 
> >Can someone pls let me know whether the aforementioned is a good 
equipment to 
> >invest ? Or I should go for a typical 2 channels Oscilloscopes ?
> > 
> >Thanks in advance for your help.
> >Davis
> >
> >  
> >
> 
> What do you need ?
> 
> What frquency range ?
> What bandwidth ?
> 
> What are you going to use it for ?
> 
> I usually use micros and similar boards up to 100MHz
> so ended up buying two second hand scopes and a usb  based logic 
analyser.
> 
> The one I use most of the time a HP 54502A
> dual channel 400MHz dso.
> 
> One I use only when I need to debug something
> higher than 200MHz  HP54501  1GHz quad channel scope.
> 
> Logic analyser  great when debugging micros.
> easy to use and easy to carry.
> http://www.rockylogic.com/products/ant8.html
> http://www.rockylogic.com/products/ant8spec.html
> good for up to around 100MHz.
> I use this a lot. Windows software only though.
> Still waiting on them to release their api
> so you can call it from your own software.
> 
> What I find is it is usually easier to have equipment that doesn't 
need 
> a computer.
> Hit the switch and it is up and running.
> Can have hassles with usb based equipment especially if other 
devices 
> your using use
> the same manufacturers device but with a different driver or 
different 
> driver version.
> 
> Alex Gibson
> 
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