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

[Jeff Ackerman]

XIPAR does not do GPS timing of the audio so there will be no timing of
audio.  Its called "simple voter", no frills.  XIPAR simply selects the
best receiver based on DSP signal strength measurements.

On Wed, Mar 30, 2016 at 9:01 AM, Joe Leikhim <rhyolite at leikhim.com> wrote:

> 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>
> 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> 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
>>
>> Are you looking for some more in depth RF design aspects of receiver
>> voting? I can help perhaps.
>>
>> Joe
>>
>> www.leikhim.com
>>
>>
>> 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
>>
>> 407-982-0446
>>
>> WWW.LEIKHIM.COM
>>
>>
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>
>
>
> --
> Jeff Ackerman
> kg6uyz at gmail.com
>
>
> --
> Joe Leikhim
>
>
> Leikhim and Associates
>
> Communications Consultants
>
> Oviedo, Florida
> JLeikhim at Leikhim.com
> 407-982-0446
> WWW.LEIKHIM.COM
>
>


-- 
Jeff Ackerman
kg6uyz at gmail.com
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