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<TITLE>RE: [hfsig] bytes per minute</TITLE>
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<P><FONT SIZE=2>Ok...thanks.</FONT>
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<P><FONT SIZE=2>Then if MT63 has a user throughput of 200 WPM, then this is 1200 CPS or 7200 Characters per minute (cpm). If a character is considered one byte, then 7200 cpm is 7200 bytes/minute.</FONT></P>
<P><FONT SIZE=2>Walt/K5YFW</FONT>
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<P><FONT SIZE=2>-----Original Message-----</FONT>
<BR><FONT SIZE=2>From: hfsig-bounces@lists.tapr.org</FONT>
<BR><FONT SIZE=2>[<A HREF="mailto:hfsig-bounces@lists.tapr.org">mailto:hfsig-bounces@lists.tapr.org</A>]On Behalf Of chris@yipyap.com</FONT>
<BR><FONT SIZE=2>Sent: Tuesday, May 17, 2005 4:23 PM</FONT>
<BR><FONT SIZE=2>To: hfsig@lists.tapr.org</FONT>
<BR><FONT SIZE=2>Subject: [hfsig] bytes per minute</FONT>
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<P><FONT SIZE=2>I understand 'Net' bytes per minute to be the rate</FONT>
<BR><FONT SIZE=2>of "user" data through the channel. The channel</FONT>
<BR><FONT SIZE=2>itself may involve compression, forward error correction</FONT>
<BR><FONT SIZE=2>or other methods which increase or decrease the</FONT>
<BR><FONT SIZE=2>number of bytes per second put through the channel</FONT>
<BR><FONT SIZE=2>to achieve that level of user data flow.</FONT>
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<P><FONT SIZE=2>According to this page,</FONT>
<BR><FONT SIZE=2><A HREF="http://www.qsl.net/zl1bpu/MT63/Technical.html" TARGET="_blank">http://www.qsl.net/zl1bpu/MT63/Technical.html</A></FONT>
<BR><FONT SIZE=2>the rate for MT63 is 20 characters per second with</FONT>
<BR><FONT SIZE=2>a 2khz bandwidth, which would be ~ 20 Bps, and 160 bps.</FONT>
<BR><FONT SIZE=2>That would be (20 * 60 ) 1200 Bytes per minute.</FONT>
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<P><FONT SIZE=2>Twenty characters per second, 5 character "words", 60 seconds</FONT>
<BR><FONT SIZE=2>per minute, would give 240 WPM (?)</FONT>
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<P><FONT SIZE=2>This page:</FONT>
<BR><FONT SIZE=2><A HREF="http://www.arrl.org/FandES/field/regulations/techchar/PACTOR-II.html" TARGET="_blank">http://www.arrl.org/FandES/field/regulations/techchar/PACTOR-II.html</A></FONT>
<BR><FONT SIZE=2>says Pactor II max is 1200bps, roughly 7.5 times faster.</FONT>
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<P><FONT SIZE=2>Chris</FONT>
<BR><FONT SIZE=2>kc0atc</FONT>
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