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<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=703140820-25082004>Scott,</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=703140820-25082004></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN class=703140820-25082004>So how
many "cycles" of 1200 or 2200 fit into the period allowed for 1200 baud
?</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=703140820-25082004></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=703140820-25082004></SPAN></FONT> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Scott Miller
[mailto:scott@3xf.com]<B>On Behalf Of </B>scott@opentrac.org<BR><B>Sent:</B>
Wednesday, 25 August 2004 4:22 PM<BR><B>To:</B> vk4tec@tech-software.net;
'TAPR APRS Mailing List'<BR><B>Subject:</B> RE: [aprssig] APRS tone encode
question<BR><BR></DIV></FONT>
<DIV><SPAN class=756551706-25082004><FONT color=#0000ff face=Arial size=2>It
just means that when you switch from one tone to the other, you stay at the
same place in the waveform. You get a sine wave that's stretched and
compressed in places, but it doesn't have any jumps or flat spots in
it.</FONT></SPAN></DIV>
<DIV><SPAN class=756551706-25082004><FONT color=#0000ff face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=756551706-25082004><FONT color=#0000ff face=Arial
size=2>Scott</FONT></SPAN></DIV>
<DIV><SPAN class=756551706-25082004><FONT color=#0000ff face=Arial
size=2>N1VG</FONT></SPAN></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
aprssig-bounces@lists.tapr.org [mailto:aprssig-bounces@lists.tapr.org]<B>On
Behalf Of </B>Andrew Rich<BR><B>Sent:</B> Tuesday, August 24, 2004 10:33
PM<BR><B>To:</B> Scott Miller; 'TAPR APRS Mailing List'<BR><B>Subject:</B>
RE: [aprssig] APRS tone encode question<BR><BR></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=390013205-25082004>what is phase continuous ?</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=390013205-25082004></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=390013205-25082004></SPAN></FONT> </DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> Scott Miller
[mailto:scott@3xf.com]<BR><B>Sent:</B> Tuesday, 24 August 2004 11:41
PM<BR><B>To:</B> vk4tec@tech-software.net; 'TAPR APRS Mailing
List'<BR><B>Subject:</B> RE: [aprssig] APRS tone encode
question<BR><BR></DIV></FONT>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=946463713-24082004>No, it requires that the phase be
continuous. Since 2200 isn't an even multiple of 1200 baud it
wouldn't come out even anyway. In the OpenTracker, a pointer to the
current sine value is incremented each step. The size of the
increment depends on which tone is being sent at the
moment.</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=946463713-24082004></SPAN></FONT> </DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=946463713-24082004>Scott</SPAN></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=946463713-24082004>N1VG</SPAN></FONT></DIV>
<BLOCKQUOTE dir=ltr style="MARGIN-RIGHT: 0px">
<DIV align=left class=OutlookMessageHeader dir=ltr><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B>
aprssig-bounces@lists.tapr.org
[mailto:aprssig-bounces@lists.tapr.org]<B>On Behalf Of </B>Andrew
Rich<BR><B>Sent:</B> Tuesday, August 24, 2004 1:58 AM<BR><B>To:</B> TAPR
APRS Mailing List<BR><B>Subject:</B> RE: [aprssig] APRS tone encode
question<BR><BR></FONT></DIV>
<DIV><FONT color=#0000ff face=Arial size=2><SPAN
class=796545708-24082004>Does Packet require the tone shift from 1200 to
2200 to occur at a zero crossing ? </SPAN></FONT></DIV>
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