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P25 failing to capture?

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70cutlass442

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We have a new to us P25 system (conventional multicast W/voting).

At times, units will key but you only hear a "click" as if they unkeyed, no voice. Is this what it sounds like to not capture? the same radio can key a second later and be just fine. These are mobile radios mostly, RSSI is good when they do come across. This is becoming a real issue for us.
 

a417

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are these issues isolated to a single site, or are they present anywhere on the system?
 

70cutlass442

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are these issues isolated to a single site, or are they present anywhere on the system?

This is global. We have two sites that vote. Initially I thought it was only occurring at the remote site and we had a network error, but I am not observing network issues when these problems occur. Also, if there is a network error, such as a link failing, each repeater would function independent and voice would still be heard (just no voting).
 

mrsvensven

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We have a new to us P25 system (conventional multicast W/voting).

At times, units will key but you only hear a "click" as if they unkeyed, no voice. Is this what it sounds like to not capture? the same radio can key a second later and be just fine. These are mobile radios mostly, RSSI is good when they do come across. This is becoming a real issue for us.
Does the comparator have a status display that shows you which sites are receiving signal and which is curently being voted? What does it show while this is occurring?

One way to narrow down if it's related to one specific site is to have a unit talk while, one at a time, you force each site to vote and monitor the audio.
 

RFI-EMI-GUY

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RF Technology Eclipse 2 base stations, Harris XG25M and P units.
Whose voter? Make/model? Can you observe the voting status for a few hours and see if it is a specific remote site ?

Edit:
P25/Analog Voting over IP
An industry first! No additional controllers required makes for easy configuration and no continual polling makes for low bandwidth.

Great to be the first!
 
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A system in Iowa we worked on had occasional voting with nothing but silence. Ira was at the site working on a paging system when he noticed the repeater's carrier detect LED come on but no audio came through. The tech checked the programming and found it would detect about 3 dB lower than what it took to pass audio to the xmtr and voter.
 

BMDaug

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A well implemented voting system is a work of art! There’s a reason they are a REALLY great idea on paper and more difficult to implement in practice! Especially when everything is configured in some software program… hundreds of fields and one incorrect parameter can send you into a massive troubleshooting campaign!

-B
 
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