Icom IC-80AD Instruction Manual - Page 42
Dv Mode Programming
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6 DV MODE PROGRAMMING N About the D-STAR system In the D-STAR (Digital Smart Technologies for Amateur Radio) system, repeater linking via a 10 GHz backbone and/ or internet gateway provides you with much wider coverage range during digital voice mode operation. • D-STAR system outline Repeater A 10 GHz Area 440 MHz Station A Zone Repeater B 440 MHz Station B Internet network Repeater C 440 MHz Station C 10 GHz Zone Repeater D 440 MHz Station D In traditional repeater operation, stations that are communicating must both be in the repeater's operating area. However, D-STAR repeaters can be linked via a 10 GHz backbone, as shown in the illustration at left. Using D-STAR, stations A and B can communicate even though they are in widely separated repeater operating areas. Furthermore, D-STAR repeaters can be linkled through an internet gateway, which can extend the communication range dramatically. For example, when station B uses the internet gateway connection, it can communicate with station C even though they are thousands of miles apart! By using the gateway connection, long distance communication is possible using 144 or 440 MHz digital voice! In the D-STAR system, an independent repeater's operating area is called an Area and a group that of linked repeaters via a 10 GHz backbone is called a Zone. About time-out timer function The IC-80AD has a time-out timer function for digital repeater operation. The timer limits a continuous transmission to approx. 10 min. Warning beeps will sound approx. 30 sec. before time-out and then again immediately before time-out. 34