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<br />00\)295 <br /> <br />. <br /> <br />Base Station <br /> <br />The Handar Ba.e Station i. the central receiving point for data from <br />all the remote .ite.. D.ta i. tran.mitted directly to the ba.e .tation or <br />indirectly through one or more repe.ter.. <br /> <br />The Ba.e Station, .hown in Figure 7, con.i.t. of a receiver, antenna, <br />cable, and IBM PC XI' computer with monochrome or color di.play. The IBM <br />computer usn a Multi-tasking cpeuting Software System that allows data <br />proce..ing concurrently with data collection from the remote aite.. The <br />Bale Station computer al.o include. the Handar Enhanced Alert Software <br />progr~ that collect., .tore., proce..e., and display. all collected data <br />a. well a. providing the in.tallation configuration for the ALJDrr .y.te~ <br /> <br />The Handar ,41SV or '4sSU Receiver, .hown in Figure I, i. a .ingle <br />frequency receiver tuned to the ranote or repeater .ite frequency. The <br />output of the receiver i. a decoded .ignal connnected to the RS Z3Z .erial <br />port of the computer. <br /> <br />The '41 Receiver operate. concurrently at both 300 and LZOO baud <br />rate.. Con.equently, ir ha. the capability to operate with any of the <br />uiuing 300 baud Alert network. II well II a mill: of both 300 and lZOO baud <br />data transmitter.. It, therefore, will meet the impendins .tandard. for <br />lZOO baud data transmitter rate.. <br /> <br />. <br /> <br />The '41 al.o ha. an LED di.play that provide. a continuou.ly updated <br />readins of quality, noi.e, and loading--par~eter. that are quite u.eful, <br />particularly in den.e network., for trouble.hootins and i.olating the <br />cau.e. of invalid data. Invalid data may be cau.ed, for example, by noi.e <br />interference, or too high a .en.or load ins on the .y.te~ <br /> <br />. <br /> <br />,. <br />