[rescue] doubt regarding wireles ethernet...

Brian Hechinger rescue at sunhelp.org
Thu Jul 19 13:13:12 CDT 2001


> what you have here is a 20mhz signal.  When an ethernet station 
> transmits it sends 1volt peak to peak across the transmit pins.  This 
> signal is modulated with Manchester encoding.  This serves as both a 
> clock signal and a data signal.  A zero looks like this(---|__), a 
> one looks like this(__|---).  So a positive to negative transition 
> means 0, and a negative to positive transition means 1.  What you 
> need to do is set it up so that the voltage accross pins 1 and 2 on 
> your computer gets fed into the amplifier on the transmitter.  The 
> reciever should be able to demodulate that signal and supply the same 
> voltage accross pins 3 and 6 on the hub.  The same should be done for 
> the other(hub back to computer) channel.  I hope this helps.

ok, he just said what i was trying to say, but did a MUCH better job of it. :)

-brian



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