I'm working on various options for a voter project for the local club. One of the choices is of course using AllStar. I've used RTCM's in the past but in non-voting applications. I need to make sure I capture all of the items (other than receivers, antennas, etc) related to make voting happen via AllStar. RTCM per remote receiver site. Internet access at remote receiver site (or private LAN if also available at server site) AllStar server at some site to perform the voting (possibly at TX site) RTCM at the TX location (also used for one of the voting receivers) GPS connected to the "master" TX RTCM (only one needed per system, right?) Internet access at the TX site if voting from there or RF one way link from server if not Additionally, what is the realistic time delay to be expected between input audio/keying and the repeater TX audio/keying? If it's 3/4 to 1 second, seems like everyone will hear the last few syllables they uttered after they unkey. I know that annoys me and anticipate the club members won't like it either. Has anyone developed a PC, RPi, BBB based voter to replace the GE, Motorola, JPS, Doug Hall, LDG systems? Maybe with some external audio stuff to go with the voter logic? Thanks for any and all input Mike / W5JR Alpharetta GA -- tnx Mike / W5JR Alpharetta GA
On 6/23/15 1:20 PM, J Roden wrote:
I'm working on various options for a voter project for the local club. One of the choices is of course using AllStar. I've used RTCM's in the past but in non-voting applications. I need to make sure I capture all of the items (other than receivers, antennas, etc) related to make voting happen via AllStar.
RTCM per remote receiver site. Internet access at remote receiver site (or private LAN if also available at server site) AllStar server at some site to perform the voting (possibly at TX site) RTCM at the TX location (also used for one of the voting receivers) GPS connected to the "master" TX RTCM (only one needed per system, right?)
You'll need a GPS at each site to time stamp the voice packets to ensure you compare the right time to the right time in terms of voice quality.
Additionally, what is the realistic time delay to be expected between input audio/keying and the repeater TX audio/keying? If it's 3/4 to 1 second, seems like everyone will hear the last few syllables they uttered after they unkey. I know that annoys me and anticipate the club members won't like it either.
You can tune this, but I've seen it be 250-500 ms by default.
Has anyone developed a PC, RPi, BBB based voter to replace the GE, Motorola, JPS, Doug Hall, LDG systems? Maybe with some external audio stuff to go with the voter logic?
I'd like to see that, but I don't think a general purpose PC will work for it unless it's really fast and doing only the one thing. The voter latency is totally deterministic and clocked to the same clock at each site, it would be very hard to do this in a general purpose PC. 73's -- Bryan Fields 727-409-1194 - Voice 727-214-2508 - Fax http://bryanfields.net
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Bryan Fields -
J Roden