1. Tusa Consulting Services Ben Hill County, Georgia Board of Commissioners Testing and Analysis

2. Introduction #1 – Confirm radio programming
#2 – Confirm licensing/ site ERP
#3 – Confirm amplifier configuration
#4 – Perform intermodulation/ co-location study
#5 – Perform noise floor measurements
#6 – Perform line sweeps

3. Task #1 - Radio Programming
Confirmed correct programming of basestations
Sheriff’s
Hospital
Volunteer Fire
Road Department
County Jail
Confirmed correct programming of mobiles
Focused on Sheriff’s Office
Confirmed correct programming of portables

4. Task #2 – ERP / FCC Licensing
Sheriff’s Office – Triangle Tower
TX:
RX:
EMS – Hospital Tower
TX:
RX:
Volunteer Fire – GA Forestry Tower
TX:
RX:
Road Department
TX:
RX:

5. Task #2 – ERP / FCC Licensing
Sheriff’s Office – Triangle Tower
TX:
RX:
Not licensed for
Not an actual VHF frequency
Should be one of these:

6. Task #3 – Amplifier Configuration
Confirmed Sheriff’s basestation and amplifier are operating within FCC licensed ERP.

7. Task #4 – Intermodulation Study
Intermod interference is a process in which multiple transmitted frequencies combine to produce a result that impairs receive performance.
Sources can be other local or distant towers, but typically created from within the same site as receive system.
Not the same as co-location interference.
More to come with Task #4….

8. Task #5 - Effective Sensitivity

9. Task #6 - Perform Line Sweeps
‘System’ sweeps performed at each site
Return Loss, Distance to Fault
No issues found at any site

10. Task #4 – Co-Location Study
EMS Receive Frequency – MHz

11. Task #4 – Co-Location Study
Vol. Fire Receive Frequency – MHz

12. Task #4 – Co-Location Study
Road Dept. Receive Frequency – MHz

13. Task #4 – Co-Location Study
Sheriff’s Receive Frequency – MHz
Statewide TX Frequency – MHz

14. Task #4 – Co-Location Study
Statewide Use of – MHz

15. Conclusion
Sheriff needs to reprogram all radios to different currently licensed receive frequency:
Relocate all agencies to centrally located tower with more height
Conservation of resources
Single improved site
Vs. multiple/scattered/inadequate
Single point of contact/ responsibility for preventative and corrective radio maintenance and system organization

16. Project Conclusion Testing and Analysis Report

17. Questions?