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

Joe Leikhim rhyolite at leikhim.com
Wed Mar 30 11:09:10 EDT 2016

Here are some products to start with;

There is the Raven M4x


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)

Motorola Spectra Tac (Obsolete Now Motorola has pretty much abandoned 
analog FM technology. Uses 600 ohm VF circuits,)

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.


Are you looking for some more in depth RF design aspects of receiver 
voting? I can help perhaps.



On 3/8/2016 5:20 AM, Steve Wright wrote:
> On 05/03/16 06:00,  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



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