Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sun-barr!rutgers!uwvax!chaource.cs.wisc.edu!peng
From: peng@chaource.cs.wisc.edu (PENG)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: Re: What (exactly) are MFM and RLL Modulation Techniques?
Message-ID: <11301@spool.cs.wisc.edu>
Date: 18 Sep 90 22:23:32 GMT
References: <4304@trantor.harris-atd.com> <1453@gold.GVG.TEK.COM> <4313@trantor.harris-atd.com> <1456@gold.GVG.TEK.COM>
Sender: news@spool.cs.wisc.edu
Distribution: na
Organization: U of Wisconsin CS Dept
Lines: 11

In article <1456@gold.GVG.TEK.COM> grege@gold.GVG.TEK.COM (Greg Ebert) writes:

[explanation about the difference between RLL and MFM deleted]

Thanks for your explanation.  I believe many of us have learned a lot from
your series of articles.  But there seem to be two other terms that are
frequently connected with hard disk encoding, NRZ and ZBR.  NRZ seems to
stand for "non return to zero."  And I have no idea what ZBR stands for.
Would you care to explain these two terms to us?  Thanks!

-peng