Re: New joystick communication standard proposal

[Eric . Boon]

> The length of the cable will not have much limitations, except for the
> resistance of it:

Which is exactly the reason to mak it not too long.  The longer the cable,
the higher the resitance (and impedance) will become. The result of this is
that the flanks (signal changes) will 'flatten':

signal on short cable:
      ___
 |___|   |___
     ^---^-------- flanks
signal on long cable:
      ___
 |___/   \___

signal on very long cable:

      ___
 |_.-'   `-._

signal on way too long a cable:

 |-------------

When the cable is too long, the flanks become that 'flat' that they may
lead to a undetermined signal state on the line, or the flanks and low/high
signals may disappear completely, with the line signal floating somewhere
in between. This of course implies a lot of transmission errors.

>So don't make the cable too long. I'm not an expert in this too, but I
>know something of it.... (at least, I should, I'm a 4th year physics-student
>now...)

Well, this is what _I_ know about it, having studied neither physics, nor
electronics :-)

        Eric (hard core CompSci :-))
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