UHF Repeater coverage problem

[RFI-EMI-GUY]

A repeater system must be tested for desense (TNRD) into a proper 50 ohm load and then teested again on the installed antenna system. The goal is to have none, 0 dB, desense into 50 ohm load and nearly zero dB into the antenna. You may find you have site noise and that is tested and measured similarly by substituting antenna and load with no TX activated. If your shop has not done this, their job is half done.

 

[speedway_navigator]

The DB Spectra comes with a two port hybrid combiner and if that's disconnected the insertion loss will be less.

I had a call to VA hospital with a paging coverage problem. They had a UHF repeater and VHF paging xmtr cross band coupled into a custom DAS. The VA police decided to ditch their UHF system and go with the county's 800 trunk system. The feed from the repeater to the coupler was hanging in the air since the repeater had been removed.

They ended up spending a tidy sum of our tax payer dollars to install an 800 MHz DAS because they had poor coverage after the switch.

 

[prcguy]

I had a call to VA hospital with a paging coverage problem. They had a UHF repeater and VHF paging xmtr cross band coupled into a custom DAS. The VA police decided to ditch their UHF system and go with the county's 800 trunk system. The feed from the repeater to the coupler was hanging in the air since the repeater had been removed.

They ended up spending a tidy sum of our tax payer dollars to install an 800 MHz DAS because they had poor coverage after the switch.

Where are the radio system drawings for the building and who failed to update them or to even look at them when changing radio systems? When I was working people would be fired over something like this. Everything must be documented and up to date at all times, otherwise you get what you described.

 

[speedway_navigator]

Where are the radio system drawings for the building and who failed to update them or to even look at them when changing radio systems? When I was working people would be fired over something like this. Everything must be documented and up to date at all times, otherwise you get what you described.

It's the feds, no one accepts responsibility.
I bet if someone ran a report on the number of times the VAPD used common TGs on the county's system it would be minimal.