Emax

I think a DSO is a better option here as this investigation will most likely involve looking at the signal waveforms. A logic analyzer will usually have 
more channels and a deeper memory than a DSO but it will just show logic transitions. A DSO with a combined logic analyzer pod would probably be 
ideal, but more expensive.

/Tristan

Saturday, November 22, 2008, 5:39:23 AM, you wrote:

>
so the non-USB port didn't work?

That link I sent the other week was to a 422 adapter card that was able 
to run synchronous.... is the issue that this card can only be clock 
master, or something???

PS, you do NOT need a digital storage oscilloscope. A logic analyser 
will tell you way more here.

esynthesist wrote:

>Thanks Tristan.
>
>I'm wondering though: even if we find the actual cause of the problem 
>(timing or signal level), I guess there's not much we can do to solve 
>the problem. Besides making a custom communication board of course.
>Because I don't think characteristics such as "clock to data 
>relationship" can be configured on any normal commercial RS422 port 
>device for PCs, right ?
>That's in fact the only reason why I didn't invest in a scope yet: 
>exactly knowing the problem would be nice, but not being able to 
>solve it would be frustrating :-)
>Man ! I would love the standard PC RS422 ports to be externally 
>clockable ! Why is this (once again) one of those "Mac"-only 
>features !
>
>Question: the RS422 communication "timeout period" on the Emax can be 
>configured with a SYSEX command (from 1 to 127 seconds). But I guess 
>this is not something that can help on the lowel level data 
>syncronization problem we are dealing with here, right ? I 
>guess "our" problem is more related to the speed at which a stream of 
>bits (as a whole) is entering the Emax port ?
>
>///E-Synthesist 
>
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