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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Yes, there is a type of PCM as you
mentioned. Unfortunately when you need the fastest response, for a snap roll,
everything moves at once to its maximum position.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=2 face=Tahoma><span
style='font-size:10.0pt;font-family:Tahoma'>-----Original Message-----<br>
<b><span style='font-weight:bold'>From:</span></b>
nsrca-discussion-bounces@lists.nsrca.org
[mailto:nsrca-discussion-bounces@lists.nsrca.org] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Bob Richards<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, December 19, 2006
9:43 AM<br>
<b><span style='font-weight:bold'>To:</span></b> NSRCA Mailing List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [NSRCA-discussion]
2.4 Ghz</span></font></p>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Seems about 10 years ago that I heard of one radio
manufacturer working on a PCM system with a priority type update. IOW, there is
not much reason to provide a fast frame rate if no channels are changing. If a
few channels are changing position, then this information can be sent
immediately in a single frame, and there is no need to immediately send the
channels that have not changed.<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Also, I was under the impression that PCM1024 was more
in the order of 45ms. I believe there are multiple frames sent to cover all 9
channels (similar to the two fields per frame of an interlaced TV signal).<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I still think about my old ACE Micropro radio. Simple
FM pulse stream. You could program it to put out only the number of channels
actually needed, so as to speed up the frame rate. Great for something like
pylon racers, you could have an update rate better than 12ms for a 4 channel
configuration. :-)<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Bob R.<o:p></o:p></span></font></p>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'><br>
<br>
<b><i><span style='font-weight:bold;font-style:italic'>Ed Alt
<ed_alt@hotmail.com></span></i></b> wrote:<o:p></o:p></span></font></p>
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<blockquote style='border:none;border-left:solid #1010FF 1.5pt;padding:0in 0in 0in 3.0pt;
margin-left:3.0pt;margin-top:5.0pt;margin-bottom:5.0pt'>
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<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>I just browsed some FAQ's on Futaba's site and they
had a response about frame rate for PCMG3. They state that it
is 17.6mS. I had seen someone's scope trace for PCM 1024 and they
had that at around 23 ms. I guess they have improved their PCM coding algorithm
with the introduction of the 14Z and 12Z? <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'> <o:p></o:p></span></font></p>
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<div>
<p class=MsoNormal style='margin-left:.5in'><font size=3 face="Times New Roman"><span
style='font-size:12.0pt'>Ed<o:p></o:p></span></font></p>
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</blockquote>
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