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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Hey Guys,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>There has been a lot of interest in the PCGM recently so I'm going do a run 25-50 of them if you're interested.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Let me know.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Mark Guibord<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>Micro-Node International<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'>702-528-4700<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> App_rpt-users [mailto:app_rpt-users-bounces@lists.allstarlink.org] <b>On Behalf Of </b>Jeff Carrier<br><b>Sent:</b> Sunday, May 07, 2017 6:32 PM<br><b>To:</b> app_rpt-users@lists.allstarlink.org<br><b>Subject:</b> Re: [App_rpt-users] App_rpt-users Digest, Vol 99, Issue 9<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Joe, <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Did you lock it to a GPSDO? Jim mentioned this mod to me about a year ago and I never had a chance to give it a try. My previous overlap area was tolerable but I've added a third transmitter so it may be time to try this finally.<o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On Sun, May 7, 2017 at 10:00 AM, <<a href="mailto:app_rpt-users-request@lists.allstarlink.org" target="_blank">app_rpt-users-request@lists.allstarlink.org</a>> wrote:<o:p></o:p></p><p class=MsoNormal>Send App_rpt-users mailing list submissions to<br> <a href="mailto:app_rpt-users@lists.allstarlink.org">app_rpt-users@lists.allstarlink.org</a><br><br>To subscribe or unsubscribe via the World Wide Web, visit<br> <a href="http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br>or, via email, send a message with subject or body 'help' to<br> <a href="mailto:app_rpt-users-request@lists.allstarlink.org">app_rpt-users-request@lists.allstarlink.org</a><br><br>You can reach the person managing the list at<br> <a href="mailto:app_rpt-users-owner@lists.allstarlink.org">app_rpt-users-owner@lists.allstarlink.org</a><br><br>When replying, please edit your Subject line so it is more specific<br>than "Re: Contents of App_rpt-users digest..."<br><br>This site is dedicated to the memory of Jim Dixon WB6NIL<br><br><br>Today's Topics:<br><br> 1. RTCM Simulcast and 9.6 MHz Phase locking (Joe Moskalski)<br> 2. Re: RTCM Simulcast and 9.6 MHz Phase locking (Joe Leikhim)<br><br><br>----------------------------------------------------------------------<br><br>Message: 1<br>Date: Sun, 7 May 2017 03:13:26 -0400<br>From: Joe Moskalski <<a href="mailto:kc2irv@gmail.com">kc2irv@gmail.com</a>><br>To: app_rpt mailing list <<a href="mailto:App_rpt-users@ohnosec.org">App_rpt-users@ohnosec.org</a>><br>Subject: [App_rpt-users] RTCM Simulcast and 9.6 MHz Phase locking<br>Message-ID:<br> <<a href="mailto:CAES28qyXLtJMUoGqAYk5bKU_eE2Nciq_9QQC48rBDSeZigtgHA@mail.gmail.com">CAES28qyXLtJMUoGqAYk5bKU_eE2Nciq_9QQC48rBDSeZigtgHA@mail.gmail.com</a>><br>Content-Type: text/plain; charset="utf-8"<br><br>I wanted to throw this email out to the group for all those who want to<br>simulcast with the RTCM. For those who don't know, in order to make the<br>RTCM suitable for simulcast you must have a more accurate 9.6 MHz clock for<br>the RTCM in order to ensure the audio sounds acceptable in the overlap<br>areas. I did this a few months ago using 9.6 MHz OCXO's. This worked<br>reasonably well. Not as well as I would have liked but the system was very<br>usable, but of course I wanted it to be better. Since the PCGM<br>(Programmable Clock Generation Module) is no longer available, I decided to<br>roll my own as some say.<br>I created a PLL circuit that can accept a 10 MHz, 1 MHz or 100 KHz<br>reference input and produce a phase locked 9.6 MHz out for the RTCM. I have<br>been testing this over the past few days and it has made an great<br>improvement in the audio quality in the overlap. The quality of the audio<br>in the overlap areas sounds very, very good, it's very similar to what I<br>expect to hear in commercial simulcast systems. My circuit is heavily based<br>off of an old Motorola MSF5000 HSO PLL circuit that I was able to adapt and<br>modify to my needs. There are other uses for this circuit that make it<br>attractive for simulcasting but I wont get into them here. I am will to<br>share my schematic and bill of materials (digikey) with anyone. Please send<br>me an email and I will be willing to share all of my information on the<br>project.<br><br><<a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon" target="_blank">https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon</a>><br>Virus-free.<br><a href="http://www.avast.com" target="_blank">www.avast.com</a><br><<a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link" target="_blank">https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link</a>><br><#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20170507/ad8c4eb9/attachment-0001.html" target="_blank">http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20170507/ad8c4eb9/attachment-0001.html</a>><br><br>------------------------------<br><br>Message: 2<br>Date: Sun, 7 May 2017 03:42:25 -0400<br>From: Joe Leikhim <<a href="mailto:rhyolite@leikhim.com">rhyolite@leikhim.com</a>><br>To: Users of Asterisk app_rpt <<a href="mailto:app_rpt-users@lists.allstarlink.org">app_rpt-users@lists.allstarlink.org</a>><br>Subject: Re: [App_rpt-users] RTCM Simulcast and 9.6 MHz Phase locking<br>Message-ID: <<a href="mailto:35ee60f8-a760-363b-0d28-1b6c9967cebd@leikhim.com">35ee60f8-a760-363b-0d28-1b6c9967cebd@leikhim.com</a>><br>Content-Type: text/plain; charset="utf-8"; Format="flowed"<br><br>Thanks Joe;<br><br>I would certainly be interested in your documentation. Does this solve<br>the problem of transmit PL tone jumping phase on key up, as Hayden<br>encountered?<br><br>Joe L<br><br>On 5/7/2017 3:13 AM, Joe Moskalski wrote:<br>> I wanted to throw this email out to the group for all those who want<br>> to simulcast with the RTCM. For those who don't know, in order to make<br>> the RTCM suitable for simulcast you must have a more accurate 9.6 MHz<br>> clock for the RTCM in order to ensure the audio sounds acceptable in<br>> the overlap areas. I did this a few months ago using 9.6 MHz OCXO's.<br>> This worked reasonably well. Not as well as I would have liked but the<br>> system was very usable, but of course I wanted it to be better. Since<br>> the PCGM (Programmable Clock Generation Module) is no longer<br>> available, I decided to roll my own as some say.<br>> I created a PLL circuit that can accept a 10 MHz, 1 MHz or 100 KHz<br>> reference input and produce a phase locked 9.6 MHz out for the RTCM. I<br>> have been testing this over the past few days and it has made an great<br>> improvement in the audio quality in the overlap. The quality of the<br>> audio in the overlap areas sounds very, very good, it's very similar<br>> to what I expect to hear in commercial simulcast systems. My circuit<br>> is heavily based off of an old Motorola MSF5000 HSO PLL circuit that I<br>> was able to adapt and modify to my needs. There are other uses for<br>> this circuit that make it attractive for simulcasting but I wont get<br>> into them here. I am will to share my schematic and bill of materials<br>> (digikey) with anyone. Please send me an email and I will be willing<br>> to share all of my information on the project.<br>><br>> <<a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon" target="_blank">https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon</a>><br>> Virus-free. <a href="http://www.avast.com" target="_blank">www.avast.com</a><br>> <<a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link" target="_blank">https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link</a>><br>><br>><br>><br>><br>> _______________________________________________<br>> App_rpt-users mailing list<br>> <a href="mailto:App_rpt-users@lists.allstarlink.org">App_rpt-users@lists.allstarlink.org</a><br>> <a href="http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br>><br>> To unsubscribe from this list please visit <a href="http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users</a> and scroll down to the bottom of the page. Enter your email address and press the "Unsubscribe or edit options button"<br>> You do not need a password to unsubscribe, you can do it via email confirmation. If you have trouble unsubscribing, please send a message to the list detailing the problem.<br><br>--<br>Joe Leikhim<br><br><br>Leikhim and Associates<br><br>Communications Consultants<br><br>Oviedo, Florida<br><br><a href="mailto:JLeikhim@Leikhim.com">JLeikhim@Leikhim.com</a><br><br><a href="tel:407-982-0446">407-982-0446</a><br><br><a href="http://WWW.LEIKHIM.COM" target="_blank">WWW.LEIKHIM.COM</a><br><br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <<a href="http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20170507/460471e9/attachment-0001.html" target="_blank">http://lists.allstarlink.org/pipermail/app_rpt-users/attachments/20170507/460471e9/attachment-0001.html</a>><br><br>------------------------------<br><br>Subject: Digest Footer<br><br>_______________________________________________<br>App_rpt-users mailing list<br><a href="mailto:App_rpt-users@lists.allstarlink.org">App_rpt-users@lists.allstarlink.org</a><br><a href="http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users" target="_blank">http://lists.allstarlink.org/cgi-bin/mailman/listinfo/app_rpt-users</a><br><br><br>------------------------------<br><br>End of App_rpt-users Digest, Vol 99, Issue 9<br>********************************************<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>