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<DIV>----- Original Message ----- </DIV>
<DIV><B>From:</B> <A title=n9lhm@yahoo.com href="mailto:n9lhm@yahoo.com">Brian
Hoover</A> </DIV>
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<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [QuadList] Gene Kelley Show
color recording system</DIV>
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<BLOCKQUOTE
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: rgb(16,16,255) 2px solid"><PRE><BR><BR>Huh?<BR><BR>Quad video playback is about the most time-base stable
off-tape video you will ever <BR>come across. That's why the first analog time base correctors for quad only had <BR>a window of 2 microseconds. Any time base corrector should be able to play back <BR>quad video just fine.<BR><BR>Brian <BR></PRE></BLOCKQUOTE></TD></TR></TBODY></TABLE></BLOCKQUOTE>
<DIV>Brian:</DIV>
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<DIV>You're both right and wrong. Yes, the quad output is very stable, but
TBCs designed to work with helical formats don't work with quads due to the
difference in the nature of the timebase errors. The segmented transverse
scan presents a whole different set of errors as compared to a helical
deck.</DIV>
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<DIV>Then there's another advantage to using a digital TBC with a wide
correction window. While the original tight-lock servo design of the early
quads was necessary, the use of more modern TBC's allows much less stringent
servo systems and much faster lock-up time. That's partly how the later
model quads achieved such fast lock-up.</DIV>
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<DIV>Don</DIV></BODY></HTML>