Warp wrote:
>   Sending a raw digital signal over a cable doesn't require modulation.
> It can be as simple as "no current = 0", "current = 1". 

Except it's impossible to recognise the difference between "current" and 
"shouldn't be current but there's minute noise on the line."

In other words, you need some minimum amount of current before you say it's 
actually a 1, right?

And if the current you detect is right on the border between what you 
consider "zero current" and "one current", then it's not digital. And that 
happens every time the current goes between a zero and a one.

Indeed, the whole *reason* for using digital is to make broader swaths of 
analog come out to the same value. If you actually *could* transmit digital 
signals, you wouldn't *need* to.

-- 
Darren New, San Diego CA, USA (PST)
   The question in today's corporate environment is not
   so much "what color is your parachute?" as it is
   "what color is your nose?"

Post a reply to this message