Re: Advice on PC Based Logic Analyzer


"logicgeek" <logic.analyzer@xxxxxxxxxxx> a écrit dans le message de news:
9591c2c7-93e1-4bbf-bd75-35bcfcfade68@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
On Apr 14, 5:24 pm, Jean-Yves <no-pub-for-jypoc...@xxxxxxx> wrote:
In article
<e2b39746-56eb-4b83-82f9-855ba1839...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,





logicgeek <logic.analy...@xxxxxxxxxxx> wrote:
Hi

I'm considering to purchase a pc based logic analyzer. After a bit of
shopping around I narrowed down my options to either the Logicport
from Intronix or the Annie-USB from Janatek, maybe even their Logic-16
as well.

Before I make the final decision, is there anyone of you that owns any
of these instruments?
The obvious reason for the logicport is the fact that it costs only U
$389 for 32 channels and 500Mhz sampling rate. I have however read
this little faq article on janatek's website on how to
evaluate(compare) between various logic analyzers and I'm having
doubts of buying a logicport. The Annie-USB although a tad more
expensive seems to be a really good quality instrument. Any of you
having thoughts on this.

Luckily the need is not pressing so I have a couple of days.

8 channels is too low for a logic analyzer
16 is a minimum
34 is far enought

My only concern thou is that it sports only 8-
channels. However they have a nice little article on their website
about evaluating logic analyzers and I must say that I agree with this
rticle in that I will rather buy 8 'good channels' with sufficient
buffer depth than 32 channels and anyway not be able to use them all.
(snip)

I fully agree with Jean-Yves, 8 channels is definitively not enough for a
logic analyzer. Put it this way : If you need only 8 channels then very
probably a decent 4-channels scope will be enough, and you will use such
scope far more often than your logic analyzer. However if you have a REAL
problem that actually needs a logic analyzer then you will need at leat
20-30 channels. Just thinking at the tasks for which we have switched on our
TLA704 in the past 2 or 3 years we always used more than 8 channels. Even
for the last use (debugging of a GPIB interface) we needed 8 channels for
data plus 8 channels of control lines.
Cheers,
Robert
www.alciom.com


.

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