<div dir="ltr">Hi Joe,<div><br></div><div>I can answer part of that for you.</div><div><br></div><div>You do need a GPS with NMEA or TSIP. The RTCM needs to know the time so it can time stamp the UDP packets when sending them to the server.</div><div><br></div><div>If you go to <a href="http://svn.ohnosec.org/viewvc/projects/allstar/voter/?root=svn">http://svn.ohnosec.org/viewvc/projects/allstar/voter/?root=svn</a> and look at the VOTER Protocol.pdf and the votersystem.pdf, and look at the protocol parts, you may answer some of your questions.</div><div><br></div><div>I know the required NMEA sentences are out there somewhere, but I don't recall where I saw them.</div><div><br></div><div>You can adjust the launch delay on each RTCM, but I do not believe it does any sort of auto adjust.</div><div><br></div><div><br></div><div>Lee</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Jun 4, 2016 at 6:03 PM, Joe Moskalski <span dir="ltr"><<a href="mailto:kc2irv@gmail.com" target="_blank">kc2irv@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div>I will be setting up a 2 site UHF simulcast system in the coming months and so far I have only one question to ask. The RTCM manual is a little vague on the GPS part of the setup. Normally, with other types of radio simulcast products (which I am very familiar with several) all you need to properly time the audio is a 1 pps signal from the GPS reference. The RTCM manual makes mention of the NMEA/TSIP data being connected but does not explicitly say if that serial data is needed or if only the 1 pps is needed for simulcast operation. From the other simulcast products I have worked with, you set your bulk delay to a value larger then the delay required for the furthest site and the system will adjust. Does the RTCM version of simulcast work the same way? I just want to be sure because this will determine what type of GPS locked reference oscillator I choose for the project. <br><br></div>Regards,<br></div>KC2IRV<br></div>-Joe<br></div><div><br>
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