[App_rpt-users] Non-RTCM voter, where?

Joe Leikhim rhyolite at leikhim.com
Wed Mar 30 12:01:38 EDT 2016


Without GPS, how does XIPAR deal with jitter and network latency?

On 3/30/2016 11:25 AM, Jeff Ackerman wrote:
> If you looking for the alternative IP voting of the varuious app_rpt 
> flavors you can try XIPAR: http://www.xelatec.com/xipar/simplevoter
>
> It wont be as seamless of voting as a RTCM, but its much simpler, 
> doesnt require anything more then PC's, the IP backhaul and usb radio 
> interfaces with radios capable of giving discriminator audio.
>
> Conventional hardware voting comparators could work but require the 
> backhaul, which in most commercial applications is 4 wire e&m voice 
> circuits using either tone signaling or e&m signaling. (This method of 
> voting is done outside of allstar/app_rpt.)
>
> On Wed, Mar 30, 2016 at 8:09 AM, Joe Leikhim <rhyolite at leikhim.com 
> <mailto:rhyolite at leikhim.com>> wrote:
>
>     Here are some products to start with;
>
>     There is the Raven M4x
>
>     http://www.ravencomm.com/documents/products_doc3_23.pdf
>
>     Raytheon JPS SNV-12 (Though the future of this product is up in
>     the air, it was the defacto standard. Uses 600 ohm VF circuits, IP
>     connectivity needs to be overlaid)
>     http://www.simulcastsolutions.com/userfiles/file/appnotes/vSnv12App.pdf
>
>     Motorola Spectra Tac (Obsolete Now Motorola has pretty much
>     abandoned analog FM technology. Uses 600 ohm VF circuits,)
>     http://www.repeater-builder.com/motorola/spectra-tac/spectratac-index.html
>
>     The above voters all use some method of signal/noise voting. The
>     JPS SNV-12 and the Raven M4X use DSP to make decision, while the
>     Spectra Tac was pretty much an analog noise measurement vs a
>     status tone/audio AGC level. The SpectraTac does not support
>     non-Motorola receivers unless you know the "secret sauce" which I
>     am privy to.
>
>     This site has some practical examples of projects that are
>     simulcast, but by design incorporate the SNV-12 voters.
>
>     www.simulcastsolutions.com <http://www.simulcastsolutions.com>
>
>     Are you looking for some more in depth RF design aspects of
>     receiver voting? I can help perhaps.
>
>     Joe
>
>     www.leikhim.com <http://www.leikhim.com>
>
>
>     On 3/8/2016 5:20 AM, Steve Wright wrote:
>
>         On 05/03/16 06:00, mike at midnighteng.com
>         <mailto:mike at midnighteng.com> wrote:
>
>             FYI There are RTCM /voter systems for app_rpt if you want
>             to do it right.
>
>
>         Is there an example voting-RX project somewhere I can read about?
>
>         Non-RTCM please.  I know about the RTCM and I'm looking at
>         alternatives.
>
>
>         Many thanks,
>         Steve
>
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>
>     -- 
>     Joe Leikhim
>
>
>     Leikhim and Associates
>
>     Communications Consultants
>
>     Oviedo, Florida
>
>     JLeikhim at Leikhim.com
>
>     407-982-0446 <tel:407-982-0446>
>
>     WWW.LEIKHIM.COM <http://WWW.LEIKHIM.COM>
>
>
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>
>
>
> -- 
> Jeff Ackerman
> kg6uyz at gmail.com <mailto:kg6uyz at gmail.com>

-- 
Joe Leikhim


Leikhim and Associates

Communications Consultants

Oviedo, Florida

JLeikhim at Leikhim.com

407-982-0446

WWW.LEIKHIM.COM

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