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'[EE]: Ant8 - cheap logic analyzer'
2003\02\22@115724 by Tal

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In case somebody is looking for a cheap logic analyzer.

http://www.rockylogic.com/

$170, 8 Chan USB logic analyzer, 500ksps.

Saw an ad in a magazine, didn't try it yet.

Tal

(I am not affiliated with them in any way)

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2003\02\25@151645 by LARRY REYNOLDS

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Tal,

       I have one of these things and so far, it's nice.  But, having said
that, I must tell you that I have only given it quite basic evaluation
on simple circuits.

       Is it worth the money??  If your only looking for 8 bits and limited
analyzer memory, the price and performance are great!

Larry


Tal wrote:
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2003\02\25@223446 by j galt

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I would buy one if they would offer variable capture rates and appropriate
depths for each rate. The thing should take advantage
of the pc. First off it is spec'd at 500Msps (not 500Ksps) but for
only 3k depth. Why can't the also offer 50Msps for 50Meg depth
and 5Msps for the entire depth of the free space on your hard drive?

Dave

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2003\02\25@232529 by LARRY REYNOLDS

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Dave,

       I believe the ANT8 is a GREAT entry level logic analyzer for the price
and will work fine for my intended purposes at the present.

       I looked at the Link Systems, but found them a bit expensive for my
humble income.  This is a hobby for me.

       Maybe the (future?) ANT16? will have what you are looking for.

       But, I would suggest you ask your questions to the folks at rockylogic.

Larry

j galt wrote:
>
><snip>...  The thing should take advantage
> of the pc. First off it is spec'd at 500Msps (not 500Ksps) but for
> only 3k depth. Why can't the also offer 50Msps for 50Meg depth
> and 5Msps for the entire depth of the free space on your hard drive?
>
> Dave

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2003\02\25@232744 by LARRY REYNOLDS
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By the way Dave,

       The sample speed can be set anywhere from 500MS/s down to 100 s/s.

Larry


j galt wrote:
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2003\02\26@005554 by jim barchuk

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Hi Dave!

On Tue, 25 Feb 2003, j galt wrote:

> I would buy one if they would offer variable capture rates and appropriate
> depths for each rate. The thing should take advantage
> of the pc. First off it is spec'd at 500Msps (not 500Ksps) but for
> only 3k depth. Why can't the also offer 50Msps for 50Meg depth
> and 5Msps for the entire depth of the free space on your hard drive?
>
> Dave

Which is the slowest link? The hard drive, the USB link, or the capture
module. Clue: It's not the capture module. :) You are limited by the
weakest link.

Yes, RAM is cheap, and they could have as easily added a DIMM socket (or
two! Imagine a G of pod-RAM!) to which you add RAM at your leisure. But
this'd add, rough guess, $20-$40, for development and parts. Plus the
-power- for the RAM, which they may already be streching. External PS
rather than USB powered? Add another $20 for development, parts, and
wallwart.

Yes, they could offer slower speeds with direct connect, but again, that
costs development time.

The two purposes of this device are price and speed. Those it has.

Prediction: Ant8-TNG will include everything I mentioned, for around $200.
For what they're doing now I hope they make a billion bucks so they an
afford to develop TNG.

Have a :) day!

jb

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2003\02\26@092339 by j galt

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jim barchuk <RemoveMEjbTakeThisOuTspamJBARCHUK.Take.This.Out.COM> wrote;
>
>Which is the slowest link? The hard drive, the USB link, or the capture
>module. Clue: It's not the capture module. :) You are limited by the
>weakest link.
>

My mistake. I didn't realize USB was so slow. Still there is some rate at
which it should be able to collect data on the pc to huge depths.



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2003\02\28@045149 by jim barchuk

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Hi j!

> >>>http://www.rockylogic.com/
> >>>
> >>>$170, 8 Chan USB logic analyzer, 500ksps.
> >>>Saw an ad in a magazine, didn't try it yet.

> >Which is the slowest link? The hard drive, the USB link, or the capture
> >module. Clue: It's not the capture module. :) You are limited by the
> >weakest link.
> >
>
> My mistake. I didn't realize USB was so slow. Still there is some rate at
> which it should be able to collect data on the pc to huge depths.

It does one thing, at very high speed, at a reasonable price. Speed is
it's primary target market. The buffer built into the module is very
limited. It talks to the host 'however' it does. Anything more, such as
more buffer, or different comm techniques, cost bunches more silicon, and
that breaks the 'price' objective. As I said there'll probably be more
versions that do more things but this one is to get them off the ground
and into the market and build a reputation and following.

Or not, if their management is as klunky as their web site. ;)

Have a :) day!

jb

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