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d <br />cl> <br />n <br />fD <br />a" <br />Specification changes required to expand the system to a 1515 Channel System: <br />294,375 <br />136,975 431,350 <br />M <br />I - Increase 10 -Channel system to 1 5 -Channel system, both north and south sites <br />In March 1993 the user survey performed by Pallons Associates dictated a system design <br />h-+ <br />of 10 -Channels for the east end of the County. The latest survey, November 1995, indicated <br />an increase to 1,563 users. Under FCC loading requirements of 100 radios per channel, the <br />10 -Channel system would be insuffteient to handle the latest number of users. The total <br />frequency allocation available to the County is 20 channels (10 existing and 10 pooled (NPSPAC)). <br />Of the 20 channels, IS have been designed to operate on the east coast in a simulcast mode; the <br />remaining S channels'will be trunked seamlessly in the western portion of the County. <br />2- Seamless 5 -Channel West Multi -site 195,609 <br />195,609 <br />The original system included a requirement for the radio operator, when traveling west, to <br />physically switch the radio to the west tower when the signal became weak from the east <br />transmitter sites. The recommended system makes the west tower a 5 -Channel seamless <br />system which will automatically switch the radio and it will be transparent to the radio <br />user ensuring coverage and personal safety. ; <br />3- 1 5 -Channel Hot Stand-by (Hobart Tower) 193,954 <br />193,954 <br />The original system did not include a stand-by system, ready at all•times to come on line in the event of <br />failure of &a simulcast mode of operation, preventative maintenance, or software upgrades. Without <br />LJ <br />this capability, all users of the system would be out of service until the main system came back on line. <br />4- Additional installation and engineering costs 164,184 <br />164,184 <br />The following equipment must be installed, documented and engineered to provide adequate <br />operation of the 800 MHz system: <br />- 4 -Channels for Mutual Aid and associated antenna system <br />- 3 additional consoles and switch interfaces <br />- 10 digital voice interface modules <br />- 35 digital modems <br />y - telephone patch <br />- UPS system <br />- 2 site controllers for multi -site operations <br />- 1 5 -channel and antenna system at Hobart Tower <br />Q <br />Subtotals Changes due to expansion 848 122 0 <br />0 0 136,973 097 <br />-985 <br />l'o <br />1 <br />1 <br />