[arm-allstar] Anyone running RTCM?

[R. Wayne]

I called you on your 14 machine and got no reply. I noticed that I could hear myself unkeying (but not speaking) but that does not dissuade us from wanting (needing) a voted system. Our Inland Empire machine can be heard just fine all over So. Calif. but Rose Hills blocks us to the west since moving up to Heap’s Peak. Even on the 210/134 corridor out to Santa Monica but limited RX. Our vendor has a PV site and we’ve thought of a multi-site simulcast system. But as you know Tim, here in So. Calif. there is significant overlap. That means a centrally located TX site like you have. That will cost us $350/mo. just for site rental. But that gives us an intranet if that’s what we want. If going the simulcast route we’d elect to use Oat, Heap’s and Quartzite but they all overlap significantly. I wonder if anyone has thoughts on tis that they might share.

From: Tim Sawyer 
Sent: Thursday, September 10, 2015 3:35 PM
To: ARM Allstar 
Subject: Re: [arm-allstar] Anyone running RTCM?

If you want to hear a voted system connect to 2531 and call me, WD6AWP.

On Thu, Sep 10, 2015 at 1:41 PM, Chris Zenchenko <wb9rsq at gmail.com> wrote:

  I’d love to hear of some nodes running the voting. I have no interest in multiple transmit sites but the voting could really make a difference. 

  I’ve never heard a good analog controller based one yet. 

  Nobody takes enough care to balance the audio and match the receiving and transmitting equipment. 

  Even slight differences in models or levels makes voting sound poor to me. 

  If you have a channel with a longer path you get noise and you can usually tell when a system votes to that channel. 

  Maybe the RTCM makes voting possible. 

  I’d want to listen for days and even weeks before I plunked down dollars. 



  From: arm-allstar-bounces at hamvoip.org [mailto:arm-allstar-bounces at hamvoip.org] On Behalf Of Sam Skolfield
  Sent: Thursday, September 10, 2015 3:32 PM
  To: ARM Allstar <arm-allstar at hamvoip.org>
  Subject: Re: [arm-allstar] Anyone running RTCM?



  It works, but not perfectly. If you have minimal overlap, it's acceptable, but once your coverage starts to overlap, it gets hairy. Typical of any simulcast system to a certain extent, but perhaps a little worse than others. 

  There is a high-level system that used to simulcast from two big mountain tops using RTCMs (BIG overlap) and it was  really rough whenever you were in earshot of both transmitters. 



  I will say that the voting using RTCMS is absolutely fantastic. I have had amazing results. 





  On Thu, Sep 10, 2015 at 4:24 AM, Steve Wright <stevewrightnz at gmail.com> wrote:

    I just read that the RTCM simulcast multi-transmitter system actually
    DOESNT work.

    Can anyone shed light?


    S


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  Sam Skolfield


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