<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman, new york, times, serif;font-size:12pt"><DIV>Sorry....there is no PWM implementation in our current radio systems signals to the servos.......</DIV>
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<DIV>The TX/RX signal is a series of PPM pulse groups in a specific order, one for each channel. Each pulse group in the signal represents a channel to the RX the RX decodes them and send the the appropriate Pulse Position Moduated signal to the individual servos....</DIV>
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<DIV>PCM encodes more data into the signals and each "frame" of data contains position commands and failsafe info. This is more like simplex serial communications.......</DIV>
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<DIV><BR>Richard</DIV>
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<B><SPAN style="FONT-WEIGHT: bold">From:</SPAN></B> Duane Beck <duane.e.beck@comcast.net><BR><B><SPAN style="FONT-WEIGHT: bold">To:</SPAN></B> General pattern discussion <nsrca-discussion@lists.nsrca.org><BR><B><SPAN style="FONT-WEIGHT: bold">Sent:</SPAN></B> Saturday, June 20, 2009 8:07:33 PM<BR><B><SPAN style="FONT-WEIGHT: bold">Subject:</SPAN></B> Re: [NSRCA-discussion] Servo Signals<BR></FONT><BR>Over-the-air transmitted signal is PPM. The RX separates each channel and sends PWM to the servo.<BR><BR>http://www.rcgroups.com/forums/attachment.php?attachmentid=2474091<BR>http://www.pabr.org/pxarc/doc/pxarc.en.html#opwm_ppm<BR><BR>Duane<BR><BR>Richard Lewis wrote:<BR>> More accurately it is a pulse position signal. The RX sends a beginning pulse that the RX recognizes and then a position pulse at a later time. The time between the start pulse and the position pulse is the absolute position that the servo is commanded to
move to.<BR>> Link to a tutorial:<BR>> http://www.hooked-on-rc-airplanes.com/servo-tutorial.html<BR>> Richard<BR><BR>_______________________________________________<BR>NSRCA-discussion mailing list<BR><A href="mailto:NSRCA-discussion@lists.nsrca.org" ymailto="mailto:NSRCA-discussion@lists.nsrca.org">NSRCA-discussion@lists.nsrca.org</A><BR>http://lists.nsrca.org/mailman/listinfo/nsrca-discussion<BR></DIV></DIV></div></body></html>