Subject:
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what is NRZ ??? (fwd)
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Newsgroups:
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lugnet.robotics
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Date:
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Mon, 22 Mar 1999 13:02:32 GMT
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Original-From:
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Jim Choate <ravage@einstein.ssz.com/antispam/>
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Viewed:
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1076 times
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----- Forwarded message from Erling :O) -----
From: "Erling :O)" <evo@ruc.dk>
Subject: what is NRZ ???
Date: Mon, 22 Mar 1999 12:29:36 +0100
when you write:
The IR protocol associated with sending a "message" to the RCX is
prettysimple. Bit encoding is 2400 baud, NRZ, 1 start, 8 data, odd parity, 1
stop bit. A '0' is coded as a 417us pulse of 38kHz IR, a '1' bit is 417usof
nothing.
what dose NRZ mean ?
----- End of forwarded message from Erling :O) -----
Normaly it means "Non-Return to Zero". It's used in communications protocols
where changes in state signal a change in the value of a bit. So if you
get a string of 1's for example there won't be any change in the signal
until a 0 is encountered.
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The Armadillo Group ,::////;::-. James Choate
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