Technical Appendix Specifications for the RADIO SYSTEM UPGRADE

Section 2. RADIO SYSTEM PERFORMANCE REQUIREMENTSThis Section describes system performance requirements for the new radio networks or specificsubsystems. The acceptance test procedures required to demonstrate compliance with the performancerequirements here are contained in other Sections of the Specification.Radio CoverageA. The City has selected repeater and receiver sites based on experience of reliableperformance with regard to signal strength and building penetration. The Contractorshall be responsible for meeting a communications reliability level specified herein at95% of locations served by the proposed sites, in narrowband digital mode.B. At the City’s Option, this will be confirmed through outdoor signal strengthmeasurements (to ensure enough margin exists for predicted indoor coverage) andBER measurements (for overall outdoor coverage and simulcast overlap). Thecontractor shall be contractually bound to meet this requirement in the areas shownon their submittals.C. The contractor shall be responsible for the actual effectiveness of propagationcoverage of the radio system, including both the voice quality and the signal levelachieved. Contractors shall submit verifiable coverage prediction maps showinganticipated coverage performance given the sites proposed herein.D. The required City Service coverage areas are shown in the Appendix. All areasshould be combined and treated as one contiguous area. A geo-coded form is alsoavailable from the City upon request.Radio Site SelectionThe Proposal shall include all proposed primary conventional radio sites, including the newtransmitters defined in Special Operation Requirements TRANS3 and TRANS2.Basis of Coverage DesignThe above goal is based on the following design criteria:1. Transmit powers and receiver sensitivity as described in the Specifications2. Delivered Audio Quality (DAQ) of 3.4, equivalent to a Bit Error Rate (BER) of2%.3. DAQ criterion of 3.4 is described in TSB-88B as "Speech understandable withrepetition only rarely required. Some Noise/Distortion." The above criteriaconform to the approach described in the most recent version of TIA TSB-88B,Wireless Communications Systems; Performance in Noise and Interference –Limited Situtations; Recommended Methods for Technology – IndependentModeling, Simulation and Verification.4. UHF (450-470 MHz) coverage predictions are based on the following:City of San Luis Obispo 28 Radio System Upgrade TECHNICAL APPENDIX