[App_rpt-users] RTCM Simulcast question

[Lee Woldanski]

Hi Joe,

Copying the list so they see your update/questions.

As for votemond/votermon, yes, go with Allmon2. Easier to configure, and
many more features at your disposal. :)


Lee

On Sat, Jun 4, 2016 at 6:21 PM, Joe Moskalski <kc2irv at gmail.com> wrote:

> Ok, thank you, now I can be sure I get the correct GPS reference unit.
> Thank you for the link, I had not seen this before.
> With this information I will be using this unit for my GPS data, 1pps and
> 10 Mhz. I have tested one of these it should will work.
>
>
> http://www.ebay.com/itm/10MHZ-Output-Sine-Wave-GPS-Disciplined-Clock-GPSDO-Antenna-Power-Supply-USA-/281802105734?hash=item419cb6e386:g:to0AAOSwKIpV-hf7
>
> Also does anyone know of someone who has successfully setup a simulcast
> system with the RTCM's? I was just wondering if I could touch base with
> them and possibly avoid any common pitfalls.
>
> Just in case any one was wondering I will be using Kenwood TKR-840
> repeaters for this project.
>
> Another question I have is there are references to the votmond java
> application for monitoring the system but I believe Allmon2 succeeds
> votmond, is this correct?
>
> On Sat, Jun 4, 2016 at 9:09 PM, Lee Woldanski <ve7fet at tparc.org> wrote:
>
>> Hi Joe,
>>
>> I can answer part of that for you.
>>
>> 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.
>>
>> If you go to
>> http://svn.ohnosec.org/viewvc/projects/allstar/voter/?root=svn and look
>> at the VOTER Protocol.pdf and the votersystem.pdf, and look at the protocol
>> parts, you may answer some of your questions.
>>
>> I know the required NMEA sentences are out there somewhere, but I don't
>> recall where I saw them.
>>
>> You can adjust the launch delay on each RTCM, but I do not believe it
>> does any sort of auto adjust.
>>
>>
>> Lee
>>
>> On Sat, Jun 4, 2016 at 6:03 PM, Joe Moskalski <kc2irv at gmail.com> wrote:
>>
>>> 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.
>>>
>>> Regards,
>>> KC2IRV
>>> -Joe
>>>
>>>
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>>
>>
>>
>> --
>> Lee Woldanski, AScT
>> VE7FET
>>
>
>


-- 
Lee Woldanski, AScT
VE7FET
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