Hi All,
I am working with my Fire Prevention folks on Distributed Amplifier Systems in the city in which I work.
I recently assisted with/observed coverage testing at a new concrete tilt-up industrial complex being built.
A little background first:
Law enforcement is on a Motorola P25 700MHz countywide trunked system
Fire is on a city-owned repeated analog VHF system with on-scene tactical communications in simplex
The coverage tests are coming back as failing (predicted based on completion of construction and occupation) on the uplink side. I am assuming at this point that it is the 700 trunked system that is failing, absent specific information from the vendor.
The vendor is stating that the -95db uplink signal strength requirement is being waived by some other jurisdictions around us. Can anyone explain that rationale? It seems to me that being able to transmit out of a building would be just as important as receiving into the building. Also, out of curiosity, why the -95db threshold? Is it related in particular to digital communications - sufficient DAQ or is it important to analog as well? It can't be an arbitrary number.
Thanks in advance,
Mark
Sent from my SM-N960U using Tapatalk
I am working with my Fire Prevention folks on Distributed Amplifier Systems in the city in which I work.
I recently assisted with/observed coverage testing at a new concrete tilt-up industrial complex being built.
A little background first:
Law enforcement is on a Motorola P25 700MHz countywide trunked system
Fire is on a city-owned repeated analog VHF system with on-scene tactical communications in simplex
The coverage tests are coming back as failing (predicted based on completion of construction and occupation) on the uplink side. I am assuming at this point that it is the 700 trunked system that is failing, absent specific information from the vendor.
The vendor is stating that the -95db uplink signal strength requirement is being waived by some other jurisdictions around us. Can anyone explain that rationale? It seems to me that being able to transmit out of a building would be just as important as receiving into the building. Also, out of curiosity, why the -95db threshold? Is it related in particular to digital communications - sufficient DAQ or is it important to analog as well? It can't be an arbitrary number.
Thanks in advance,
Mark
Sent from my SM-N960U using Tapatalk